What is the output of

` printf("%d", 5 + 2 * 3); `?

• 21

• 11

• 16

• 15

Which function returns the length of a string?

• strcopy()

• strlen()

• strcmp()

• strcat()

Which of the following is a valid C identifier?

• int@num

• 123abc

• _varName

• void

What does `#include` do in a C program?

• Declares main function

• Links standard I/O functions

• Allocates memory

• None of the above

What is the output of the following loop? for(int i = 0; i < 3; i++) { printf("%d ", i); }

• 0 1 2

• 1 2 3

• 0 1 2 3

• 0 1

Which storage class maintains the variable value between function calls?

• auto

• register

• static

• extern

Which operator is used to access the value at an address in C?

• &

• *

• ->

• @

How many bytes will this union occupy in memory?

union u1 { int a; float b; };

• 0

• 4

• 8

• 2

In C, what is the index of the first element in an array?

• 1

• 0

• -1

• Depends on declaration

Which bitwise operator is used to shift bits to the left?

• <<

• >>

• &

• ~