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

C Memory Allocation Interview Questions

91. What is Dynamic Memory Allocation?

When a programmer knows the exact size of the data, array is a good choice. When a programmer have no idea about the size of the data, then you are left with one way is by using Dynamic Memory Allocation. Refer For More C Memory Allocation

92. What is Malloc?

  • malloc() is the programmer's shorthand to represent memory allocation.
  • malloc() allocates a block of size bytes to a program from the heap.
  • malloc() allocate an exact quantity of memory explicitly to a program, when required.
  • allocation of memory is done in contiguous location.

Refer For More C Malloc

93. What is Calloc?

  • calloc() is the programmer's shorthand to represent clear allocation.
  • calloc() allocates a block of size bytes to a program from the heap.
  • calloc() allocate an exact quantity of memory explicitly to a program, when required.
  • allocation of memory is done in non-consecutive memory location.

Refer For More C Calloc

94. Tell something about free() in C?

  • free() deallocates a memory block which are all allocated previously by malloc, calloc and realloc.
  • free() is mainly used when the data in the memory blocks will no longer required.

Refer For More C Free Function Handling

95. What is Realloc?

  • realloc() is the programmer's shorthand to represent reallocation.
  • realloc() reallocates the already allocated memory.
  • realloc() allocates an exact quantity of memory explicitly to a program, when required.
  • allocation of memory is done either in consecutive memory location or in non-consecutive memory location.

Refer For More C Realloc

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