WALK-IN-INTERVIEW

#1: Which is valid C expression?

a) int my_num = 100,000;

b) int my_num = 100000;

c) int my num = 1000;

d) int $my_num = 10000;

Answer: b

Explanation: space, comma and $ cannot be used in a variable name.

#2: What is the output of this C code?

#include

int main()

{

    printf("Hello World! %d \n", x);

    return 0;

}

a) Hello World! x;

b) Hello World! followed by a junk value

c) Compile time error

d) Hello World!

 Answer: c

Explanation: It results in an error since x is used without declaring the variable x.

#3: What will happen if the below program is executed?

#include

int main()

{

    int main = 3;

    printf("%d", main);

    return 0;

}

a) It will cause a compile-time error

b) It will cause a run-time error

c) It will run without any error and prints 3

d) It will experience infinite looping

Answer: c

Explanation: A C program can have same function name and same variable name.

#4: What is the output of this C code?

#include 

int main()

{

   char chr;

   chr = 128;

   printf("%d\n", chr);

   return 0;

}

a) 128

b) -128

c) Depends on the compiler

d) None of the mention

Answer: b

Explanation: signed char will be a negative number.

#5: What is the output of this C code?

#include

int main()

{

    char *p[1] = {"hello"};

    printf("%s", (p)[0]);

    return 0;

}

a) Compile time error

b) Undefined behaviour

c) hello

d) None of the mentioned

Answer: c

Explanation: None

#6: What is the output of this C code?

#include

int main()

{

    printf("crazyfor\code\n");

    return 0;

}

a) crazyforcode

b) crazyforcode

c) codeyfor

d) crazyfor

Answer: c

Explanation: r is carriage return and moves the cursor back. sanfo is replaced by class