WinRunner question encyclopedia with answers

1. Explain WinRunner testing process? - a) WinRunner testing process involves six main stages
   i.Create GUI Map File so that WinRunner can recognize the GUI objects in the application being tested
   ii.Create test scripts by recording, programming, or a combination of both. While recording tests, insert checkpoints where you want to check the response of the application being tested.
   iii.Debug Test: run tests in Debug mode to make sure they run smoothly
   iv.Run Tests: run tests in Verify mode to test your application.
   v.View Results: determines the success or failure of the tests.
   vi.Report Defects: If a test run fails due to a defect in the application being tested, you can report information about the defect directly from the Test Results window.
2. What is contained in the GUI map? - a) WinRunner stores information it learns about a window or object in a GUI Map. When WinRunner runs a test, it uses the GUI map to locate objects. It reads an object’s description in the GUI map and then looks for an object with the same properties in the application being tested. Each of these objects in the GUI Map file will be having a logical name and a physical description.
   b) There are 2 types of GUI Map files.
   i.Global GUI Map file: a single GUI Map file for the entire application
   ii.GUI Map File per Test: WinRunner automatically creates a GUI Map file for each test created.
3. How does WinRunner recognize objects on the application? - a) WinRunner uses the GUI Map file to recognize objects on the application. When WinRunner runs a test, it uses the GUI map to locate objects. It reads an object’s description in the GUI map and then looks for an object with the same properties in the application being tested.
4. Have you created test scripts and what is contained in the test scripts? - a) Yes I have created test scripts. It contains the statement in Mercury Interactive’s Test Script Language (TSL). These statements appear as a test script in a test window. You can then enhance your recorded test script, either by typing in additional TSL functions and programming elements or by using WinRunner’s visual programming tool, the Function Generator.
5. How does WinRunner evaluates test results? - a) Following each test run, WinRunner displays the results in a report. The report details all the major events that occurred during the run, such as checkpoints, error messages, system messages, or user messages. If mismatches are detected at checkpoints during the test run, you can view the expected results and the actual results from the Test Results window.
6. Have you performed debugging of the scripts? - a) Yes, I have performed debugging of scripts. We can debug the script by executing the script in the debug mode. We can also debug script using the Step, Step Into, Step out functionalities provided by the WinRunner.
7. How do you run your test scripts? - a) We run tests in Verify mode to test your application. Each time WinRunner encounters a checkpoint in the test script, it compares the current data of the application being tested to the expected data captured earlier. If any mismatches are found, WinRunner captures them as actual results.
8. How do you analyze results and report the defects? - a) Following each test run, WinRunner displays the results in a report. The report details all the major events that occurred during the run, such as checkpoints, error messages, system messages, or user messages. If mismatches are detected at checkpoints during the test run, you can view the expected results and the actual results from the Test Results window. If a test run fails due to a defect in the application being tested, you can report information about the defect directly from the Test Results window. This information is sent via e-mail to the quality assurance manager, who tracks the defect until it is fixed.
9. What are the different modes of recording? - a) There are two type of recording in WinRunner.
   i.Context Sensitive recording records the operations you perform on your application by identifying Graphical User Interface (GUI) objects.
   ii.Analog recording records keyboard input, mouse clicks, and the precise x- and y-coordinates traveled by the mouse pointer across the screen.
10. What is the purpose of loading WinRunner Add-Ins? - a) Add-Ins are used in WinRunner to load functions specific to the particular add-in to the memory. While creating a script only those functions in the add-in selected will be listed in the function generator and while executing the script only those functions in the loaded add-in will be executed else WinRunner will give an error message saying it does not recognize the function.
11. How to modify the logical name or physical description of the object? - Using GUI editor
12. How Winrunner handles varying window labels? - Using regular expressions
13. How do you write messages to the report? - report_msg
14. How you used WinRunner in your project? - Yes, I have been WinRunner for creating automates scripts for GUI, functional and regression testing of the AUT.
15. Explain WinRunner testing process? - WinRunner testing process involves six main stages
    i.Create GUI Map File so that WinRunner can recognize the GUI objects in the application being tested
    ii.Create test scripts by recording, programming, or a combination of both. While recording tests, insert checkpoints where you want to check the response of the application being tested.
    iiiDebug Test: run tests in Debug mode to make sure they run smoothly
    iv.Run Tests: run tests in Verify mode to test your application.
    v.View Results: determines the success or failure of the tests.
    vi.Report Defects: If a test run fails due to a defect in the application being tested, you can report information about the defect directly from the Test Results window.
16. What in contained in the GUI map? - a) WinRunner stores information it learns about a window or object in a GUI Map. When WinRunner runs a test, it uses the GUI map to locate objects. It reads an object’s description in the GUI map and then looks for an object with the same properties in the application being tested. Each of these objects in the GUI Map file will be having a logical name and a physical description.
    b) There are 2 types of GUI Map files.
    i.Global GUI Map file: a single GUI Map file for the entire application
    ii.GUI Map File per Test: WinRunner automatically creates a GUI Map file for each test created.
17. How does WinRunner recognize objects on the application? - a)WinRunner uses the GUI Map file to recognize objects on the application. When WinRunner runs a test, it uses the GUI map to locate objects. It reads anobject’sdescription in the GUI map and then looks for an object with the same properties in the application being tested.
18. Have you created test scripts and what is contained in the test scripts? - a) Yes I have created test scripts. It contains the statement in Mercury Interactive’s Test Script Language (TSL). These statements appear as a test script in a test window. You can then enhance your recorded test script, either by typing in additional TSL functions and programming elements or by using WinRunner’s visual programming tool, the Function Generator.
19. How does WinRunner evaluates test results? - a) Following each test run, WinRunner displays the results in a report. The report details all the major events that occurred during the run, such as checkpoints, error messages, system messages, or user messages. If mismatches are detected at checkpoints during the test run, you can view the expected results and the actual results from the Test Results window.
20. Have you performed debugging of the scripts? - a) Yes, I have performed debugging of scripts. We can debug the script by executing the script in the debug mode. We can also debug script using the Step, Step Into, Step out functionalities provided by the WinRunner.
21. How do you view the contents of the GUI map? - a) GUI Map editor displays the content of a GUI Map. We can invoke GUI Map Editor from the Tools Menu in WinRunner. The GUI Map Editor displays the various GUI Map files created and the windows and objects learned in to them with their logical name and physical description.
22. When you create GUI map do you record all the objects of specific objects? - a) If we are learning a window then WinRunner automatically learns all the objects in the window else we will we identifying those object, which are to be learned in a window, since we will be working with only those objects while creating scripts.
23. What is the purpose of set_window command? - a) Set_Window command sets the focus to the specified window. We use this command to set the focus to the required window before executing tests on a particular window.
    Syntax: set_window(, time);
    The logical name is the logical name of the window and time is the time the execution has to wait till it gets the given window into focus.
24. How do you load GUI map? - a) We can load a GUI Map by using the GUI_load command.
    Syntax: GUI_load();
25. What is the disadvantage of loading the GUI maps through start up scripts? - a) If we are using a single GUI Map file for the entire AUT then the memory used by the GUI Map may be much high.
    b) If there is any change in the object being learned then WinRunner will not be able to recognize the object, as it is not in the GUI Map file loaded in the memory. So we will have to learn the object again and update the GUI File and reload it.
26. How do you unload the GUI map? - a) We can use GUI_close to unload a specific GUI Map file or else we call use GUI_close_all command to unload all the GUI Map files loaded in the memory.
    Syntax: GUI_close(); or GUI_close_all;
27. What actually happens when you load GUI map? - a) When we load a GUI Map file, the information about the windows and the objects with their logical names and physical description are loaded into memory. So when the WinRunner executes a script on a particular window, it can identify the objects using this information loaded in the memory.
28. What is the purpose of the temp GUI map file? - a) While recording a script, WinRunner learns objects and windows by itself. This is actually stored into the temporary GUI Map file. We can specify whether we have to load this temporary GUI Map file should be loaded each time in the General Options.
29. What is the extension of gui map file? - a) The extension for a GUI Map file is “.gui”.
30. How do you find an object in an GUI map. - a) The GUI Map Editor is been provided with a Find and Show Buttons.
    i To find a particular object in the GUI Map file in the application, select the object and click the Show window. This blinks the selected object.
    ii.To find a particular object in a GUI Map file click the Find button, which gives the option to select the object. When the object is selected, if the object has been learned to the GUI Map file it will be focused in the GUI Map file.
31. What different actions are performed by find and show button? - a) To find a particular object in the GUI Map file in the application, select the object and click the Show window. This blinks the selected object.
    b) To find a particular object in a GUI Map file click the Find button, which gives the option to select the object. When the object is selected, if the object has been learned to the GUI Map file it will be focused in the GUI Map file.
32. How do you identify which files are loaded in the GUI map? - a) The GUI Map Editor has a drop down “GUI File” displaying all the GUI Map files loaded into the memory.
33. How do you modify the logical name or the physical description of the objects in GUI map? - a) You can modify the logical name or the physical description of an object in a GUI map file using the GUI Map Editor.
34. When do you feel you need to modify the logical name? - a) Changing the logical name of an object is useful when the assigned logical name is not sufficiently descriptive or is too long.
35. When it is appropriate to change physical description? - a) Changing the physical description is necessary when the property value of an object changes.
36. How WinRunner handles varying window labels? - a) We can handle varying window labels using regular expressions. WinRunner uses two “hidden” properties in order to use regular expression in an object’s physical description. These properties are regexp_label and regexp_MSW_class.
    i.The regexp_label property is used for windows only. It operates “behind the scenes” to insert a regular expression into a window’s label description.
    ii.The regexp_MSW_class property inserts a regular expression into an object’s MSW_class. It is obligatory for all types of windows and for the object class object.
37. What is the purpose of regexp_label property and regexp_MSW_class property? - a) The regexp_label property is used for windows only. It operates “behind the scenes” to insert a regular expression into a window’s label description.
    b) The regexp_MSW_class property inserts a regular expression into an object’s MSW_class. It is obligatory for all types of windows and for the object class object.
38. How do you suppress a regular expression? - a) We can suppress the regular expression of a window by replacing the regexp_label property with label property.
39. How do you copy and move objects between different GUI map files? - a) We can copy and move objects between different GUI Map files using the GUI Map Editor. The steps to be followed are:
    i Choose Tools - GUI Map Editor to open the GUI Map Editor.
    ii.Choose View - GUI Files.
    iii.Click Expand in the GUI Map Editor. The dialog box expands to display two GUI map files simultaneously.
    iv. View a different GUI map file on each side of the dialog box by clicking the file names in the GUI File lists.
    v.In one file, select the objects you want to copy or move. Use the Shift key and/or Control key to select multiple objects. To select all objects in a GUI map file, choose Edit > Select All.
    vi.Click Copy or Move.
    vii.To restore the GUI Map Editor to its original size, click Collapse.
40. How do you select multiple objects during merging the files? - a) Use the Shift key and/or Control key to select multiple objects. To select all objects in a GUI map file, choose Edit > Select All.
41. How do you clear a GUI map files? - a) We can clear a GUI Map file using the “Clear All” option in the GUI Map Editor.
42. How do you filter the objects in the GUI map? - a) GUI Map Editor has a Filter option. This provides for filtering with 3 different types of options.
    i. Logical name displays only objects with the specified logical name.
    ii. Physical description displays only objects matching the specified physical description. Use any substring belonging to the physical description.
    iii. Class displays only objects of the specified class, such as all the push buttons.
43. How do you configure gui map? - a) When WinRunner learns the description of a GUI object, it does not learn all its properties. Instead, it learns the minimum number of properties to provide a unique identification of the object.
    b) Many applications also contain custom GUI objects. A custom object is any object not belonging to one of the standard classes used by WinRunner. These objects are therefore assigned to the generic “object” class. When WinRunner records an operation on a custom object, it generates obj_mouse_ statements in the test script.
    c) If a custom object is similar to a standard object, you can map it to one of the standard classes. You can also configure the properties WinRunner uses to identify a custom object during Context Sensitive testing. The mapping and the configuration you set are valid only for the current WinRunner session. To make the mapping and the configuration permanent, you must add configuration statements to your startup test script.
44. W hat is the purpose of GUI map configuration? - a) GUI Map configuration is used to map a custom object to a standard object.
45. How do you make the configuration and mappings permanent? - a) The mapping and the configuration you set are valid only for the current WinRunner session. To make the mapping and the configuration permanent, you must add configuration statements to your startup test script.
46. What is the purpose of GUI spy? - a) Using the GUI Spy, you can view the properties of any GUI object on your desktop. You use the Spy pointer to point to an object, and the GUI Spy displays the properties and their values in the GUI Spy dialog box. You can choose to view all the properties of an object, or only the selected set of properties that WinRunner learns.
47. What is the purpose of obligatory and optional properties of the objects? - a) For each class, WinRunner learns a set of default properties. Each default property is classified “obligatory” or “optional”.
    i. An obligatory property is always learned (if it exists).
    ii.An optional property is used only if the obligatory properties do not provide unique identification of an object. These optional properties are stored in a list. WinRunner selects the minimum number of properties from this list that are necessary to identify the object. It begins with the first property in the list, and continues, if necessary, to add properties to the description until it obtains unique identification for the object.
48. When the optional properties are learned? - a) An optional property is used only if the obligatory properties do not provide unique identification of an object.
49. What is the purpose of location indicator and index indicator in GUI map configuration? - a) In cases where the obligatory and optional properties do not uniquely identify an object, WinRunner uses a selector to differentiate between them. Two types of selectors are available:
    i. A location selector uses the spatial position of objects.
50. The location selector uses the spatial order of objects within the window, from the top left to the bottom right corners, to differentiate among objects with the same description. - ii. An index selector uses a unique number to identify the object in a window.

J2SE Interview Questions and Answers 1

What is abstract ?
A Java keyword used in a class definition to specify that a class is not to be instantiated, but rather inherited by other classes. An abstract class can have abstract methods that are not implemented in the abstract class, but in subclasses.

What is abstract class ?
A class that contains one or more abstract methods, and therefore can never be instantiated. Abstract classes are defined so that other classes can extend them and make them concrete by implementing the abstract methods.

What is abstract method ?
A method that has no implementation.

What is Abstract Window Toolkit (AWT) ?
A collection of graphical user interface (GUI) components that were implemented using native-platform versions of the components. These components provide that subset of functionality which is common to all native platforms. Largely supplanted by the Project Swing component set. See also Swing.

What is access control ?
The methods by which interactions with resources are limited to collections of users or programs for the purpose of enforcing integrity, confidentiality, or availability constraints.

What is ACID ?
The acronym for the four properties guaranteed by transactions: atomicity, consistency, isolation, and durability.

What is actual parameter list ?
The arguments specified in a particular method call. See also formal parameter list.

What is API ?

Application Programming Interface. The specification of how a programmer writing an application accesses the behavior and state of classes and objects.

What is applet ?
A component that typically executes in a Web browser, but can execute in a variety of other applications or devices that support the applet programming model.

What is ASCII ?
American Standard Code for Information Interchange. A standard assignment of 7-bit numeric codes to characters. See also Unicode.

What is atomic ?
Refers to an operation that is never interrupted or left in an incomplete state under any circumstance.

What is authentication ?
The process by which an entity proves to another entity that it is acting on behalf of a specific identity.

What is autoboxing ?
Automatic conversion between reference and primitive types.

What is bean ?
A reusable software component that conforms to certain design and naming conventions. The conventions enable beans to be easily combined to create an application using tools that understand the conventions.

What is binary operator ?
An operator that has two arguments.

What is bitwise operator ?
An operator that manipulates the bits of one or more of its operands individually and in parallel. Examples include the binary logical operators (&, |, ^), the binary shift operators (<< , >>, >>> ) and the unary one's complement operator (~).

What is block ?
In the Java programming language, any code between matching braces. Example: { x = 1; }.

J2SE Interview Questions and Answers 2

What is Boolean ?
Refers to an expression or variable that can have only a true or false value. The Java programming language provides the boolean type and the literal values true and false.

What is break ?
A Java keyword used to resume program execution at the statement immediately following the current statement. If followed by a label, the program resumes execution at the labeled statement.

What is bytecode ?
Machine-independent code generated by the Java compiler and executed by the Java interpreter.

What is case ?
A Java keyword that defines a group of statements to begin executing if a value specified matches the value defined by a preceding switch keyword.

What is casting ?
Explicit conversion from one data type to another.

What is catch ?
A Java keyword used to declare a block of statements to be executed in the event that a Java exception, or run time error, occurs in a preceding try block.

What is "abstract schema" ?
The part of an entity bean's deployment descriptor that defines the bean's persistent fields and relationships.

What is "abstract schema name" ?
A logical name that is referenced in EJB QL queries.

What is "access control" ?
The methods by which interactions with resources are limited to collections of users or programs for the purpose of enforcing integrity, confidentiality, or availability constraints.

What is "ACID" ?
The acronym for the four properties guaranteed by transactions: atomicity, consistency, isolation, and durability.

What is "activation" ?

The process of transferring an enterprise bean from secondary storage to memory. (See passivation.)

What is "anonymous access" ?
Accessing a resource without authentication.

What is class ?
In the Java programming language, a type that defines the implementation of a particular kind of object. A class definition defines instance and class variables and methods, as well as specifying the interfaces the class implements and the immediate superclass of the class. If the superclass is not explicitly specified, the superclass will implicitly be Object.

What is class method ?
A method that is invoked without reference to a particular object. Class methods affect the class as a whole, not a particular instance of the class. Also called a static method. See also instance method.

What is class variable ?
A data item associated with a particular class as a whole--not with particular instances of the class. Class variables are defined in class definitions. Also called a static field. See also instance variable.

What is classpath ?
An environmental variable which tells the Java virtual machine1 and Java technology-based applications where to find the class libraries, including user-defined class libraries.

What is client ?
In the client/server model of communications, the client is a process that remotely accesses resources of a compute server, such as compute power and large memory capacity.

J2SE Interview Questions and Answers 3

What is CODEBASE ?
Works together with the code attribute in the tag to give a complete specification of where to find the main applet class file: code specifies the name of the file, and codebase specifies the URL of the directory containing the file.

What is comment ?
In a program, explanatory text that is ignored by the compiler. In programs written in the Java programming language, comments are delimited using // or /*...*/.

What is commit ?
The point in a transaction when all updates to any resources involved in the transaction are made permanent.

What is compilation unit ?
The smallest unit of source code that can be compiled. In the current implementation of the Java platform, the compilation unit is a file.

What is compiler ?
A program to translate source code into code to be executed by a computer. The Java compiler translates source code written in the Java programming language into bytecode for the Java virtual machine1. See also interpreter.

What is compositing ?
The process of superimposing one image on another to create a single image.

What is constructor ?
A pseudo-method that creates an object. In the Java programming language, constructors are instance methods with the same name as their class. Constructors are invoked using the new keyword.
What is const ?
A reserved Java keyword not used by current versions of the Java programming language.

What is continue ?
A Java keyword used to resume program execution at the end of the current loop. If followed by a label, continue resumes execution where the label occurs.

What is conversational state ?
The field values of a session bean plus the transitive closure of the objects reachable from the bean's fields. The transitive closure of a bean is defined in terms of the serialization protocol for the Java programming language, that is, the fields that would be stored by serializing the bean instance.

What is CORBA ?
Common Object Request Broker Architecture. A language independent, distributed object model specified by the Object Management Group (OMG).

What is core class ?
A public class (or interface) that is a standard member of the Java Platform. The intent is that the core classes for the Java platform, at minimum, are available on all operating systems where the Java platform runs. A program written entirely in the Java programming language relies only on core classes, meaning it can run anywhere. .

What is core packages ?
The required set of APIs in a Java platform edition which must be supported in any and all compatible implementations.

What is credentials ?
The information describing the security attributes of a principal. Credentials can be acquired only through authentication or delegation.

What is critical section ?
A segment of code in which a thread uses resources (such as certain instance variables) that can be used by other threads, but that must not be used by them at the same time.

What is declaration ?
A statement that establishes an identifier and associates attributes with it, without necessarily reserving its storage (for data) or providing the implementation (for methods). See also definition.

J2SE Interview Questions and Answers 3

What is CODEBASE ?
Works together with the code attribute in the tag to give a complete specification of where to find the main applet class file: code specifies the name of the file, and codebase specifies the URL of the directory containing the file.

What is comment ?
In a program, explanatory text that is ignored by the compiler. In programs written in the Java programming language, comments are delimited using // or /*...*/.

What is commit ?
The point in a transaction when all updates to any resources involved in the transaction are made permanent.

What is compilation unit ?
The smallest unit of source code that can be compiled. In the current implementation of the Java platform, the compilation unit is a file.

What is compiler ?
A program to translate source code into code to be executed by a computer. The Java compiler translates source code written in the Java programming language into bytecode for the Java virtual machine1. See also interpreter.

What is compositing ?
The process of superimposing one image on another to create a single image.

What is constructor ?
A pseudo-method that creates an object. In the Java programming language, constructors are instance methods with the same name as their class. Constructors are invoked using the new keyword.

What is const ?
A reserved Java keyword not used by current versions of the Java programming language.

What is continue ?
A Java keyword used to resume program execution at the end of the current loop. If followed by a label, continue resumes execution where the label occurs.

What is conversational state ?
The field values of a session bean plus the transitive closure of the objects reachable from the bean's fields. The transitive closure of a bean is defined in terms of the serialization protocol for the Java programming language, that is, the fields that would be stored by serializing the bean instance.

What is CORBA ?
Common Object Request Broker Architecture. A language independent, distributed object model specified by the Object Management Group (OMG).

What is core class ?
A public class (or interface) that is a standard member of the Java Platform. The intent is that the core classes for the Java platform, at minimum, are available on all operating systems where the Java platform runs. A program written entirely in the Java programming language relies only on core classes, meaning it can run anywhere. .

What is core packages ?
The required set of APIs in a Java platform edition which must be supported in any and all compatible implementations.

What is credentials ?
The information describing the security attributes of a principal. Credentials can be acquired only through authentication or delegation.

What is critical section ?
A segment of code in which a thread uses resources (such as certain instance variables) that can be used by other threads, but that must not be used by them at the same time.

What is declaration ?
A statement that establishes an identifier and associates attributes with it, without necessarily reserving its storage (for data) or providing the implementation (for methods). See also definition.

J2SE Interview Questions with Answers 4

What is default ?
A Java keyword optionally used after all case conditions in a switch statement. If all case conditions are not matched by the value of the switch variable, the default keyword will be executed.

What is definition ?
A declaration that reserves storage (for data) or provides implementation (for methods). See also declaration.

What is delegation ?
An act whereby one principal authorizes another principal to use its identity or privileges with some restrictions.

What is deprecation ?
Refers to a class, interface, constructor, method or field that is no longer recommended, and may cease to exist in a future version.

What is derived from ?
Class X is "derived from" class Y if class X extends class Y. See also subclass, superclass.

What is distributed ?
Running in more than one address space.

What is distributed application ?
An application made up of distinct components running in separate runtime environments, usually on different platforms connected through a network. Typical distributed applications are two-tier (client/server), three-tier (client/middleware/server), and n-tier (client/multiple middleware/multiple servers).

What is do ?
A Java keyword used to declare a loop that will iterate a block of statements. The loop's exit condition can be specified with the while keyword.

What is DOM ?
Document Object Model. A tree of objects with interfaces for traversing the tree and writing an XML version of it, as defined by the W3C specification.

What is double ?
A Java keyword used to define a variable of type double.

What is double precision ?
In the Java programming language specification, describes a floating point number that holds 64 bits of data. See also single precision.

What is DTD ?
Document Type Definition. A description of the structure and properties of a class of XML files.

What is else ?
A Java keyword used to execute a block of statements in the case that the test condition with the if keyword evaluates to false.

What is Embedded Java Technology ?
The availability of Java 2 Platform, Micro Edition technology under a restrictive license agreement that allows a licensee to leverage certain Java technologies to create and deploy a closed-box application that exposes no APIs.

What is encapsulation ?
The localization of knowledge within a module. Because objects encapsulate data and implementation, the user of an object can view the object as a black box that provides services. Instance variables and methods can be added, deleted, or changed, but as long as the services provided by the object remain the same, code that uses the object can continue to use it without being rewritten. See also instance variable, instance method.

What is enum ?
A Java keyword used to declare an enumerated type.

What is enumerated type ?
A type whose legal values consist of a fixed set of constants.

J2SE Interview Questions and Answers 5

What is exception ?
An event during program execution that prevents the program from continuing normally; generally, an error. The Java programming language supports exceptions with the try, catch, and throw keywords. See also exception handler.

What is exception handler ?
A block of code that reacts to a specific type of exception. If the exception is for an error that the program can recover from, the program can resume executing after the exception handler has executed.

What is executable content ?
An application that runs from within an HTML file. See also applet.

What is extends ?
Class X extends class Y to add functionality, either by adding fields or methods to class Y, or by overriding methods of class Y. An interface extends another interface by adding methods. Class X is said to be a subclass of class Y. See also derived from.

What is field ?
A data member of a class. Unless specified otherwise, a field is not static.

What is final ?
A Java keyword. You define an entity once and cannot change it or derive from it later. More specifically: a final class cannot be subclassed, a final method cannot be overridden and a final variable cannot change from its initialized value.

What is finally ?
A Java keyword that executes a block of statements regardless of whether a Java Exception, or run time error, occurred in a block defined previously by the try keyword.

What is float ?
A Java keyword used to define a floating point number variable.

What is for ?
A Java keyword used to declare a loop that reiterates statements. The programmer can specify the statements to be executed, exit conditions, and initialization variables for the loop.

What is FTP ?
File Transfer Protocol. FTP, which is based on TCP/IP, enables the fetching and storing of files between hosts on the Internet. See also TCP/IP.

What is formal parameter list ?
The parameters specified in the definition of a particular method. See also actual parameter list.

What is garbage collection ?
The automatic detection and freeing of memory that is no longer in use. The Java runtime system performs garbage collection so that programmers never explicitly free objects.

What is generic ?
A class, interface, or method that declares one or more type variables. These type variables are known as type parameters. A generic declaration defines a set of parameterized types, one for each possible invocation of the type parameter section. At runtime, all of these parameterized types share the same class, interface, or method.

What is goto ?
This is a reserved Java keyword. However, it is not used by current versions of the Java programming language.

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What is GUI ?
Graphical User Interface. Refers to the techniques involved in using graphics, along with a keyboard and a mouse, to provide an easy-to-use interface to some program.

What is hexadecimal ?
The numbering system that uses 16 as its base. The marks 0-9 and a-f (or equivalently A-F) represent the digits 0 through 15. In programs written in the Java programming language, hexadecimal numbers must be preceded with 0x. See also octal.