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


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


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


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


Scope C Local Scope C Global Scope

Storage Classes

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


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


What is String C String Functions


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


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


What is Union


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

C Pointers Interview Questions and Answers

81. Define Pointers Arithmetic in C?

C programming allow programmers just like you to do arithmetic operations using pointers. So, programmers can perform any arithmetic operations using pointer variables. Performing arithmetic operations using pointer variables is said to be arithmetic pointer. Refer For More C Pointer Arithmetic

82. What is Pointers and Strings?

A String is a sequence of characters stored in an array. A string always ends with null ('\0') character. Simply a group of characters forms a string and a group of strings form a sentence. Refer For More C Pointer and Strings

83. What is Null Pointers?

C program defines the states that for each pointer type, When a pointer variable is declared and initialized either by a Null value or by 0 explicitly then the pointer variable is said to be null pointer. Conceptually a null pointer is a pointer that points nowhere, it doesn't have an address of any function or a variable , instead pointer is initialized with zero or null to indicate that this pointer variable is still unused. Refer For More C Null Pointers

84. What are the difference between NULL Pointer and Void Pointer?

Null Pointer Void Pointer
Null pointer is specially reserved value of a pointer. Void pointer is a specific pointer type.
Null pointer suits well for all datatypes. Void itself a datatype of size 1.
int, char, float, long, double are all datatypes are supported. void datatype is alone supported.
Null pointer is used for assigning 0 to a pointer variable of any type. Void pointer is used for storing address of other variable irrespective of its datatype.

Refer For More C NULL Pointer vs VOID Pointer

85. What is Pointers to Functions?

A function pointer is nothing more than a variable that stores the address of a function. Once the address of a function is assigned to a pointer variable (function pointer), Then the respective function pointer can be used to access the function. Following simple program can clearly demonstrate the function pointer. Refer For More C Pointers to Functions

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