C Programming Quiz

Which of the following is a valid variable name in C?

• int 1stVariable

• firstVariable

• first variable

• None of the above

What will the following code output? #include int main() { int a = 5, b = 10; printf("%d\n", a + b); return 0; }

• 5

• 10

• 15

• Compilation Error

How do you insert comments in C?

• // comment

• /* comment */

• // comment /* comment */

• All of the above

Which function is used to allocate memory dynamically in C?

• malloc()

• calloc()

• realloc()

• All of the above

What is the output of the following code? #include int main() { printf("%d\n", sizeof(char)); return 0; }

• 1

• 2

• 4

• Undefined

Which of the following is not a data type in C?

• int

• float

• real

• char

What will be the output of the following code? #include int main() { int x = 10; x += 5; printf("%d\n", x); } return 0;

• 10

• 15

• 5

• Compilation Error

Which of the following is the correct way to declare a function in C?

• void functionName;

• void functionName();

• void functionName(void);

• Both b and c

What is the purpose of the 'break' statement in a loop?

• To exit the loop

• To skip the current iteration

• To continue to the next iteration

• None of the above

How can you declare an array of integers in C?

• int arr[];

• int arr[10];

• int *arr;

• Both a and b