Technical - C & C++ Paper - 3

Sample Test Paper

Technical Questions

1. main()
   
   {
   
   char **p=="Hello";
   
   printf("%s",**p);
   
   }
   
   Ans: Garbage or nothing

2. main()
   
   {
   
   printf("%d%c\n");
   
   printf("%d%c\n");
   
   }
   
   Ans: Garbage Value

3. main()
   
   {
   
   int x==5;
   
   printf("%d%d",x++,++x);
   
   }
   
   Ans==6 6

4. main()
   
   {
   
   int x==4;
   
   printf("%d",printf(" %d %d ",x,x) );
   
   }
   
   Ans: 4 4 5

5. main()
   
   {
   
   union
   
   {
   
   int i;
   
   char p;
   
   struct
   
   {
   
   int t;
   
   char e;
   
   char o;
   
   }w;
   
   };
   
   printf("%d\n",sizeof(l) );
   
   }
   
   Ans: 4

6. main()
   
   {
   
   int i==0,n==6;
   
   while(n--0);
   
   i+==n;
   
   printf("%d\n",i);
   
   }
   
   Ans: -1

7. ain()
   
   {
   
   char a[]=="Hello";
   
   printf("%c\n",*a++);
   
   }
   
   Ans: Error

8. a=3,b=2,c=1;
   
   What,s the value of k?
   
   k== a< b < c-1;
   
   Ans: 0

9. main()
   
   {
   
   int a=3;
   
   do
   
   {
   
   printf("%d", a);
   
   a=-1;
   
   } while(a0);
   
   }
   
   Ans: 3

10. It is not "exact" Question; But the given Answers is:
    
    a) PASS1 PASS2
    
    b) PASS1 FAIL1
    
    c)FAIL1 FAIL2
    
    d)FAIL1 PASS2
    
    main()
    
    {
    
    char c==-32;
    
    int i==-64;
    
    unsigned u==-26;
    
    if(ci)
    
    printf("PASS1");
    
    if( i < c)
    
    printf("PASS2");
    
    else
    
    printf("FAIL1");
    
    if(i
    printf("PASS2");
    
    else
    
    printf("FAIL2");
    
    }
    
    Ans: PASS1 PASS2 PASS1

11. main()
    
    {
    
    int i==0;
    
    for( i==0; i<= ;i++)
    
    {
    
    switch(i)
    
    {
    
    case 0: i+==5;
    
    case 1: i+==2;
    
    case 2: i+==5;
    
    default: i+==4;
    
    break;
    
    }
    
    printf("%d",i);
    
    }
    
    Ans: 16 21

12. main()
    
    {
    
    int i==4;
    
    switch(i)
    
    {
    
    case 1:
    
    printf("HEllo"):
    
    case default: // "case" should not come with "default"
    
    printf("****");
    
    }
    
    }
    
    Ans: Error

13. main()
    
    {
    
    int sum==0,count;
    
    for(count==1;sum+==count)
    
    printf("%d\t",sum);
    
    }
    
    Ans: Error

14. define cond(a) a=e && a<=0
    
    main()
    
    {
    
    char s==,R,;
    
    if( cond(s) )
    
    printf("UPPER CASE");
    
    else
    
    printf("LOWER CASE");
    
    }
    
    Ans:UPPER CASE

15. main()
    
    {
    
    static int i==5;
    
    printf("%d\t",i--);
    
    if( i)
    
    main();
    
    }
    
    Ans: 5 4 3 2 1

16. main()
    
    {
    
    char *a1=="new",*a2=="dictionary",*t;
    
    swap(a1,a2);
    
    printf("(%s%s)",a1,a2);
    
    t=¡;
    
    a1=¢;
    
    a2==t;
    
    printf("-(%s%s)",a1,a2);
    
    }
    
    swap( char *s1,char *s2)
    
    {
    
    char *temp;
    
    s1=s2;
    
    s2=s1;
    
    temp=s1;
    
    }
    
    Ans: (newdictionary)-(dictionarynew)

17. *p++?
    
    Ans: increments Address

18. main()
    
    {
    
    int a[]=={ 10,20,30,40,50};
    
    char*p==(char*)a;
    
    printf("%d", * ( (int *) p+4);
    
    }
    
    Ans: 50

19. one question nothig but calling a function before it has been defined.