C Foundation

What is C? C Compiler Installation C Extensions C Compiler C Interpreter C Program Structure

C Basics

C Keywords C Data Types C Identifiers C Variables C Constant C Escape Sequences C Constant and Volatile C Typecast

Operators

What is Operator C Comma Operator C Arithmetic Operators C Relational Operators C Logical Operators C Bitwise Operators C Conditional Operators C : : Operator C Operator Priority

Basic IO's

Basic IO's C Formatted Functions C Unformatted Functions C Common Functions

Control Statements

What is Control Statement C if Statement C if else Statement C Nested if Statement C Else if Statement C Break Statement C Continue Statement C Switch Statement C Goto Statement

Looping

What is Control Loop C for Loop C Nested for Loop C while Loop C Nested while Loop C do while Loop C Nested do while loop

Functions

What is Function C User Defined Functions C Recursion C Passing Parameters

Scope

Scope C Local Scope C Global Scope

Storage Classes

What is Storage Class C Auto C Extern C Static C Register

Array

What is Array C One Dimensional Array C Two Dimensional Array C Multi Dimensional Array C Arrays Of Strings

String

What is String C String Functions

Pointer

What is Pointer C Pointers Arithmetic C Pointer to Pointer C Pointers and Arrays C Pointers and Strings C Pointer to Functions Void Pointers Null Pointers C Null and Void Pointer

Structure

What is Structure C Struct within Struct C Array within Structure C Pointer to Structure C Structure and Function C Enum C Bitfield Structure C Type def

Union

What is Union

Files

What is File C read a file C write a file C File Handling C Error Handling C Low Level Disk I/O C Other file functions

Memory Allocation

What is Memory Allocation C Malloc() C Calloc() C Free() C Realloc() C Coreleft()

C Reference

All ASCII Code Basic C Questions

C Interview

C Interview Sets All Star Patterns All Number Patterns All Alphabet Patterns All Series Patterns
The ones who are crazy enough to think they can change the world are the ones who do.
- Steve Jobs

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:

example.c
#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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