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Interview Questions on Variables in C : (10)

Question: 1

#include <stdio.h>
int main()
{
int @a = 10;
printf("%d",@a);
return 0;
}

(A) 10
(B) @10
(C) 10@
(D) Compilation Error

Compiler
Level: Beginner Category of MCQ: variables

Question: 2

#include <stdio.h>
int main()
{
int 2a = 10;
printf("%d",2a);
return 0;
}

(A) 10
(B) 20
(C) 2a
(D) Compilation Error

Compiler
Level: Practitioner Category of MCQ: variables

Question: 3

#include <stdio.h>
int main()
{
int __a = 10;
printf("%d",__a);
return 0;
}

(A) Compilation Error
(B) 10
(C) __10
(D) __a

Compiler
Level: Beginner Category of MCQ: variables

Question: 4

#include <stdio.h>
int a = 20;
int main()
{
int a = 10;
printf("%d", a);
return 0;
}

(A) 20
(B) Ambiguity Error
(C) 10
(D) 0

Compiler
Level: Beginner Category of MCQ: variables

Question: 5

#include <stdio.h>
int a = 20;
int main()
{
int a = 10;
printf("%d", ::a);
return 0;
}

(A) 10
(B) 20
(C) ::20
(D) ::10

Compiler
Level: Beginner Category of MCQ: variables

Question: 6

#include<stdio.h>
int main()
{
int a = 10;
printf("%d", a);
int a = 20;
printf("%d",a);
return 0;
}

(A) 1020
(B) 1010
(C) 2020
(D) Error: Redeclartion of a

Compiler
Level: Beginner Category of MCQ: variables

Question: 7

#include<stdio.h>
int main()
{
int a@ = 10;
printf("%d", a@);
return 0;
}

(A) 10
(B) 10@
(C) @
(D) [Error] stray '@' in program

Compiler
Level: Beginner Category of MCQ: variables

Question: 8

//Note: this is compiled on gcc
#include <stdio.h>

int main()
{
int a = 1;
printf("%d %d %d", a, ++a, a++);
return 0;
}

(A) 1 2 2
(B) 1 3 3
(C) 3 3 1
(D) 1 3 2

Compiler
Level: Practitioner Category of MCQ: variables

Question: 9

#include <stdio.h>

int main()
{

int i, j = 10, k=12;
i = printf("Hello");

printf("%d", i);
i = printf("%d", i);

printf("%d", i);
i=printf("%d %d %d", i, j, k);

printf("%d", i);

return 0;
}

(A) Hello 0 0 0 10 12 0
(B) Hello 5 5 1 10 12 3
(C) Hello 6 6 6 10 12 3
(D) Hello 6 6 2 2 10 12 8

Compiler
Level: Practitioner Category of MCQ: variables

Question: 10

#include <stdio.h>

int main()
{
int x = 50;
int y = 60;

printf("%d %d", x++, y--);
printf("#%d %d", ++x, --y);

return 0;
}

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Interview Questions on Variables in C : (10)

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