TCS NQT Variables and Registers Quiz- 1

Question 1

Time: 00:00:00

What is the output of this C code?



#include <stdio.h>

int i=10;

void main()

{

   printf(“i is %d”, i);

}

10

1

Garbage Value

Runtime Error

Good Job!

Oops!

Report the answer

PrepInsta Explanation
User Explanation

Once you attempt the question then PrepInsta explanation will be displayed.

Please login to submit your explanation

PrepInsta User

as a static variable gets zero value by default

Question 2

Time: 00:00:00

What is the output of this C code?



#include <stdio.h>

int *i;

int main()

{

    if (i == NULL)

     {

       printf(“true\n”);

     }

     return 0;

}

true

true only if NULL value is 0

Compile time error

Nothing

Good Job!

Oops!

Report the answer

PrepInsta Explanation
User Explanation

Once you attempt the question then PrepInsta explanation will be displayed.

Please login to submit your explanation

Question 3

Time: 00:00:00

What is the output of this C code ?



#include <stdio.h>

static int i;

void main()

{

  int i;

  printf(“i is %d”, i);

}

Nothing

Garbage Value

Run-time Error

zero

Good Job!

Oops!

Report the answer

PrepInsta Explanation
User Explanation

Once you attempt the question then PrepInsta explanation will be displayed.

Please login to submit your explanation

Question 4

Time: 00:00:00

What is the output of this C code?

#include <stdio.h>

static int x = 5;

void main()

{

        x = 9;

        printf(“%d”, x);

}

9

4

5

None of these

Good Job!

Oops!

Report the answer

PrepInsta Explanation
User Explanation

Once you attempt the question then PrepInsta explanation will be displayed.

Please login to submit your explanation

Question 5

Time: 00:00:00

The scope of an automatic variable is:

Within the block it appears

Within the blocks of the block it appears

Until the end of program

Within the block it appears & Within the blocks of the block it appears.

Good Job!

Oops!

Report the answer

PrepInsta Explanation
User Explanation

Once you attempt the question then PrepInsta explanation will be displayed.

Please login to submit your explanation

Question 6

Time: 00:00:00

Automatic variables are allocated space in the form of a:

stack

queue

priority queue

random

Good Job!

Oops!

Report the answer

PrepInsta Explanation
User Explanation

Once you attempt the question then PrepInsta explanation will be displayed.

Please login to submit your explanation

Question 7

Time: 00:00:00

Which of the following is a storage specifier?

enum

union

auto

volatile

Good Job!

Oops!

Report the answer

PrepInsta Explanation
User Explanation

Once you attempt the question then PrepInsta explanation will be displayed.

Please login to submit your explanation

Question 8

Time: 00:00:00

Automatic variables are stored in ?

stack

data segment

register

heap

Good Job!

Oops!

Report the answer

PrepInsta Explanation
User Explanation

Once you attempt the question then PrepInsta explanation will be displayed.

Please login to submit your explanation

Question 9

Time: 00:00:00

What is the output of this C code?



#include <stdio.h>

int main()

{

   register int i = 10;

   int *q = &i;

   *q = 11;

   printf(“%d %d\n”, i, *q);

}

Depends on whether i is actually stored in machine register

10 10

11 11

Compile time error

Good Job!

Oops!

Report the answer

PrepInsta Explanation
User Explanation

Once you attempt the question then PrepInsta explanation will be displayed.

Please login to submit your explanation

PrepInsta User

If you use & operator with a register variable then compiler may give an error or warning (depending upon the compiler you are using), because when we say a variable is a register, it may be stored in a register instead of memory and accessing address of a register is invalid.