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C Interview Preparation

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C Interview Preparation
5 Modules

Course Curriculum

5 Modules · 17 Chapters · 72 Topics · 322 Sub-topics

01
Foundation
3 Chapters · 11 Topics · 53 Sub-topics
Introduction to C Programming
3 Topics
Getting Started with C
5 Sub-topics
What is C Programming and Why Learn It
History and Evolution of C Language
Applications of C in Modern Computing
C vs Other Programming Languages
Understanding Compiled Languages
Setting Up Development Environment
5 Sub-topics
Setting Up Development Environment on Windows
Setting Up Development Environment on Linux
Setting Up Development Environment on macOS
Installing GCC Compiler Step by Step
Choosing an IDE (VS Code, Code::Blocks, Dev-C++)
Your First C Program
5 Sub-topics
Writing Your First C Program (Hello World)
Understanding the Compilation Process
Compilation Stages (Preprocessing to Linking)
Running C Programs from Terminal
Common Beginner Errors and How to Fix Them
Basic Syntax and Program Structure
3 Topics
C Program Anatomy
5 Sub-topics
Structure of a C Program Explained
Understanding the main() Function
Header Files and Their Purpose
Preprocessor Directives Introduction
Comments in C (Single and Multi-line)
Syntax Rules and Conventions
5 Sub-topics
Writing Readable Code Best Practices
Statements and Expressions Explained
Semicolons and Their Importance
Curly Braces and Code Block Boundaries
Whitespace and Indentation Guidelines
Keywords and Identifiers
4 Sub-topics
Reserved Keywords in C Complete List
Identifiers and Naming Rules
Case Sensitivity in C
Common Syntax Errors and Debugging
Variables and Data Types
5 Topics
Variables Fundamentals
4 Sub-topics
What are Variables Concept and Purpose
Declaring Variables in C
Initializing Variables Best Practices
Variable Scope Introduction
Basic Data Types
6 Sub-topics
Integer Data Type (int) Explained
Character Data Type (char) Explained
Floating Point Types (float and double)
Short and Long Modifiers
Signed and Unsigned Modifiers
Size of Data Types (sizeof Operator)
Constants and Literals
5 Sub-topics
Constants and Literals Part 1 (Numeric Literals)
Constants and Literals Part 2 (Character and String Literals)
The const Keyword Creating Constants
#define Preprocessor Constants
const vs #define When to Use Which
Storage Classes
5 Sub-topics
Local Variables
Global Variables and Their Usage
Static Variables Persistence Explained
Extern Variables Cross-File Access
Register Variables Optimization Hint
Type Conversion
4 Sub-topics
Type Conversion Implicit Casting
Type Conversion Explicit Casting
Type Overflow and Underflow
Best Practices for Variable Declaration
02
Core Concepts
4 Chapters · 17 Topics · 68 Sub-topics
Operators in C
6 Topics
Arithmetic Operators
5 Sub-topics
Introduction to Operators Categories Overview
Arithmetic Operators Basic Math Operations
Arithmetic Operators Modulus and Division
Increment and Decrement Operators
Pre-increment vs Post-increment Deep Dive
Assignment and Relational Operators
2 Sub-topics
Assignment Operators Simple and Compound
Relational Operators Comparisons
Logical Operators
2 Sub-topics
Logical Operators AND OR NOT
Short-Circuit Evaluation Explained
Bitwise Operators
3 Sub-topics
Bitwise Operators AND OR XOR Part 1
Bitwise Operators NOT Shifts Part 2
Bitwise Operators Practical Applications Part 3
Other Operators
5 Sub-topics
Conditional (Ternary) Operator
Comma Operator Sequential Evaluation
sizeof Operator Memory Measurement
Address-of Operator (&) Introduction
Dereference Operator (*) Introduction
Operator Precedence
4 Sub-topics
Operator Precedence Complete Table
Operator Associativity Rules
Complex Expressions Evaluation Order
Common Operator Mistakes to Avoid
Control Flow - Conditional Statements
3 Topics
if Statement
7 Sub-topics
Introduction to Control Flow
The if Statement Basic Decisions
if Statement with Multiple Conditions
The if-else Statement
Nested if-else Statements
The else-if Ladder
Common if-else Mistakes
switch Statement
5 Sub-topics
The switch Statement Introduction
switch Statement Multiple Cases
switch Statement Fall-through Behavior
switch vs if-else When to Use Which
Nested switch Statements
Other Control Statements
3 Sub-topics
Conditional Operator in Depth
goto Statement Usage and Controversy
Writing Clean Conditional Code
Control Flow - Loops
5 Topics
while Loop
4 Sub-topics
Introduction to Loops Why We Need Them
The while Loop Basic Syntax
while Loop Practical Examples
Infinite Loops Intentional and Accidental
do-while Loop
2 Sub-topics
The do-while Loop Syntax and Usage
while vs do-while Key Differences
for Loop
3 Sub-topics
The for Loop Basic Syntax
for Loop Multiple Initializations
for Loop Variations and Tricks
Nested Loops
4 Sub-topics
Nested Loops Concept and Examples
Nested Loops Pattern Printing Part 1 (Simple Patterns)
Nested Loops Pattern Printing Part 2 (Number Patterns)
Nested Loops Pattern Printing Part 3 (Complex Patterns)
Loop Control
7 Sub-topics
The break Statement in Loops
The continue Statement in Loops
break vs continue When to Use
Loop Control with Flags
Optimizing Loop Performance
Common Loop Mistakes and Fixes
Choosing the Right Loop Type
Functions Part 1 - Fundamentals
3 Topics
Function Basics
4 Sub-topics
Introduction to Functions Why Modularize
Function Declaration (Prototype)
Function Definition Writing Functions
Function Call Invoking Functions
Return and Parameters
6 Sub-topics
Return Statement Returning Values
void Functions No Return Value
Function Parameters Pass by Value
Multiple Parameters in Functions
Return Types Various Data Types
Default Return Type (Implicit int)
Function Best Practices
2 Sub-topics
Function Naming Conventions
Function Documentation Best Practices
03
Pointers and Memory
4 Chapters · 19 Topics · 81 Sub-topics
Pointers Part 1 - Fundamentals
4 Topics
Pointer Basics
7 Sub-topics
Introduction to Pointers What and Why
Memory Addresses Explained
Declaring Pointer Variables
The Address-of Operator (&)
The Dereference Operator (*)
Pointer Initialization Best Practices
NULL Pointers Safe Initialization
Pointer Arithmetic
3 Sub-topics
Pointer Arithmetic Increment/Decrement
Pointer Arithmetic Addition/Subtraction
Pointer Arithmetic Comparison
Pointers and Arrays
4 Sub-topics
Pointers and Arrays The Connection
Pointer Notation vs Array Notation
Pointers to Access Array Elements
Difference Between Pointer and Array Name
Special Pointers
5 Sub-topics
Generic Pointer void Pointer
Type Casting with void Pointers
Dangling Pointers What and How to Avoid
Wild Pointers Uninitialized Pointers
Common Pointer Mistakes
Pointers Part 2 - Advanced Concepts
5 Topics
Multi-Level Pointers
3 Sub-topics
Pointer to Pointer (Double Pointer)
Double Pointers Practical Uses
Triple Pointers When and Why
Pointers and Functions
6 Sub-topics
Pointers and Functions Pass by Reference
Swapping Values Using Pointers
Returning Pointers from Functions
Pointers to Functions Declaration
Calling Functions Through Pointers
Function Pointer Arrays
Pointers and Arrays Advanced
4 Sub-topics
Pointers and Strings
Array of Pointers vs Pointer to Array
Pointers and 2D Arrays
Dynamic 2D Arrays with Pointers
Const and Pointers
4 Sub-topics
Const Pointers Pointer to Constant
Const Pointers Constant Pointer
Const Pointers Constant Pointer to Constant
Restrict Keyword (C99)
Pointer Safety
3 Sub-topics
Pointer Type Safety
Memory Alignment and Pointers
Debugging Pointer Issues
Dynamic Memory Allocation
5 Topics
Memory Concepts
3 Sub-topics
Introduction to Dynamic Memory
Stack vs Heap Memory
Why Dynamic Allocation is Needed
Memory Allocation Functions
7 Sub-topics
The malloc() Function
malloc() Practical Examples
The calloc() Function
malloc() vs calloc() Differences
The realloc() Function
realloc() Growing and Shrinking Memory
The free() Function
Memory Management Issues
4 Sub-topics
Memory Leak What and How to Prevent
Detecting Memory Leaks
Double Free Error
Use After Free Dangerous Bug
Dynamic Data Structures
4 Sub-topics
Dynamic Arrays 1D Implementation
Dynamic Arrays Resizing
Dynamic 2D Arrays Array of Pointers
Dynamic 2D Arrays Contiguous Memory
Memory Best Practices
4 Sub-topics
Memory Allocation Failure Handling
Best Practices for Memory Management
Memory Debugging Tools Valgrind Introduction
Writing Memory-Safe Code
Memory Layout and Storage
5 Topics
Program Memory Layout
4 Sub-topics
C Program Memory Layout Overview
Text/Code Segment
Initialized Data Segment
Uninitialized Data Segment (BSS)
Stack and Heap
4 Sub-topics
Stack Segment Function Calls
Stack Frame Structure
Heap Segment Dynamic Memory
Stack vs Heap Detailed Comparison
Memory Management
4 Sub-topics
Memory Allocation Strategies
Stack Overflow Causes and Prevention
Heap Fragmentation
Memory Alignment Requirements
Advanced Memory Topics
5 Sub-topics
Cache-Friendly Programming
Virtual Memory Concepts
Memory-Mapped I/O Introduction
Volatile Keyword When and Why
Memory Barriers (Compiler)
Memory Debugging
3 Sub-topics
Understanding Core Dumps
Analyzing Memory with Tools
Writing Memory-Efficient Code
04
Advanced Topics
3 Chapters · 14 Topics · 65 Sub-topics
Structures
5 Topics
Structure Basics
6 Sub-topics
Introduction to Structures Custom Data Types
Declaring a Structure
Defining Structure Variables
Initializing Structure Members
Accessing Structure Members Dot Operator
Structure Assignment
Arrays and Structures
2 Sub-topics
Array of Structures
Nested Structures
Structures and Functions
3 Sub-topics
Structures and Functions Pass by Value
Structures and Functions Pass by Reference
Returning Structures from Functions
Pointers and Structures
3 Sub-topics
Pointers to Structures
Arrow Operator (->) for Structure Pointers
Self-Referential Structures
Advanced Structure Features
6 Sub-topics
Structure Memory Layout Padding
Structure Packing (#pragma pack)
Bit Fields in Structures
Anonymous Structures (C11)
Flexible Array Members
Structures Best Practices
Preprocessor Directives
5 Topics
Include and Define
6 Sub-topics
Introduction to C Preprocessor
Preprocessor vs Compiler Processing Stages
#include Directive Header Files
#include with < > vs " "
#define Object-like Macros
#define Function-like Macros
Macro Operators
3 Sub-topics
Macro Parameters and Arguments
Stringification Operator (#)
Token Pasting Operator (##)
Predefined Macros
4 Sub-topics
Predefined Macros (__FILE__, __LINE__)
Predefined Macros (__DATE__, __TIME__)
Predefined Macros __func__ (C99)
#undef Undefining Macros
Conditional Compilation
4 Sub-topics
Conditional Compilation (#if, #endif)
Conditional Compilation (#ifdef, #ifndef)
Conditional Compilation (#elif, #else)
Include Guards Preventing Double Inclusion
Other Directives
5 Sub-topics
#pragma Directive Compiler Instructions
#error and #warning Directives
Macro Best Practices and Pitfalls
Macros vs Inline Functions
Creating Header Files
Bit Manipulation
4 Topics
Binary Fundamentals
4 Sub-topics
Binary Number System Review
Bits Bytes and Words
Binary Representation of Integers
Two's Complement for Negative Numbers
Bitwise Operations
7 Sub-topics
Bitwise AND Practical Applications
Bitwise OR Practical Applications
Bitwise XOR Practical Applications
Bitwise NOT One's Complement
Left Shift Operator Multiplication
Right Shift Operator Division
Arithmetic vs Logical Shift
Bit Manipulation Techniques
9 Sub-topics
Setting a Specific Bit
Clearing a Specific Bit
Toggling a Specific Bit
Checking if Bit is Set
Counting Set Bits (Population Count)
Checking Power of Two
Swapping Without Temp Variable
Finding Unique Element
Bit Masking Techniques
Advanced Bit Topics
3 Sub-topics
Bit Fields Revisited
Endianness Big vs Little Endian
Practical Bit Manipulation Examples
05
Problem Solving
3 Chapters · 11 Topics · 55 Sub-topics
Arrays Part 1 - One-Dimensional Arrays
4 Topics
Array Fundamentals
5 Sub-topics
Introduction to Arrays Why Use Arrays
Declaring One-Dimensional Arrays
Initializing Arrays Various Methods
Accessing Array Elements
Array Bounds and Index Limits
Array Operations
7 Sub-topics
Iterating Through Arrays
Array Input from User
Array Output Displaying Elements
Finding Maximum Element in Array
Finding Minimum Element in Array
Calculating Sum and Average
Counting Elements with Conditions
Array Manipulation
3 Sub-topics
Reversing an Array
Copying Arrays
Comparing Two Arrays
Arrays and Memory
5 Sub-topics
Array Memory Layout
Arrays and Pointers Relationship
Passing Arrays to Functions
Returning Arrays from Functions
Common Array Mistakes
Strings Part 1 - Fundamentals
3 Topics
String Basics
4 Sub-topics
Introduction to Strings in C
String Declaration and Initialization
Character Arrays vs String Literals
Null Terminator The '\0' Character
String I/O
3 Sub-topics
String Input with scanf()
String Input with gets() and fgets()
String Output with printf() and puts()
Basic String Operations
8 Sub-topics
String Length Manual Calculation
strlen() Function Usage
String Copy Manual Implementation
strcpy() and strncpy() Functions
String Comparison Manual Method
strcmp() and strncmp() Functions
String Concatenation Manual Method
strcat() and strncat() Functions
Functions Part 2 - Advanced Concepts
4 Topics
Pass by Reference
4 Sub-topics
Pass by Reference Using Pointers
Returning Pointers from Functions
Returning Structures from Functions
Static Variables in Functions
Recursion
8 Sub-topics
Recursive Functions Introduction
Recursive Functions Base Case and Recursion
Recursion Examples Factorial
Recursion Examples Fibonacci
Recursion Examples Power Function
Recursion vs Iteration Comparison
Tail Recursion Explained
Recursion Depth and Stack Overflow
Advanced Function Features
4 Sub-topics
Inline Functions Performance Optimization
Variadic Functions Variable Arguments
stdarg.h (va_list, va_start, va_arg, va_end)
Creating Custom Variadic Functions
Function Pointers
4 Sub-topics
Callback Functions Function Pointers Intro
Function Pointers Declaration and Usage
Function Pointers Practical Applications
Array of Function Pointers

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