Commonly Asked C Interview Questions

21. What is an increment operator (++) and decrement operator (--) in c?

Increment operator ++ is used to adds 1 to the variable or operand. Decrement operator is used to subtracts 1 from the variable or operand. These increment and decrement operators can be used in two forms prefix and postfix.

Example Program:

#include<stdio.h>
int main()
{
int a = 4;
a++; //Postfix increment
++a; //prefix increment
a--; //Postfix decrement
--a; //prefix decrement
printf("The value of a is : %d ",a);
return 0;
}

22. What are the decision making statements in C?

• if statement
• if-else statements
• if-else-if statements
• switch-case statements

Refer For More C Control Statements

23. What are the loop control statements or iterative statements in C ?

• for Loop
• while loop
• do-while loop

Refer For More C Control Loop

24. Why break statement is used in a loop?

Though break statement comes under decision-making statement, its most oftenly using in looping. One can use the break statement to break out from a loop or switch statement. When break is executed within a loop, the loop ends immediately, and execution continues with the first statement following the loop. Refer For More C Break Statement

25. Why continue statement is used in a loop?

The continue statement enables you to skip to the next iteration in the loop containing the continue statement. The labeled continue statement enables you to skip to the next iteration in an outer loop enclosing the labeled continue that is identified by the label. The labeled loop need not be the loop immediately enclosing the labeled continue. Refer For More C Continue Statement

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