💻 Don’t Overwhelm to Prepare for Coding Interviews — It’s Only This Much 🚀

🔹 FOUNDATIONS (Must First)
1️⃣ Programming Language Mastery
- Choose one: Python ⭐ (most popular) Java C++ JavaScript
- Focus on: Syntax Loops & conditions Functions Built-in libraries Writing clean code

2️⃣ Time & Space Complexity
- Big-O notation
- Time vs space tradeoff
- Best / average / worst case
- Complexity analysis
🔥 Very important for interviews

3️⃣ Problem Solving Basics
- Pattern recognition
- Breaking problems into steps
- Writing pseudocode
- Edge case handling

🔥 CORE DATA STRUCTURES (HIGH PRIORITY)
4️⃣ Arrays
- Traversal
- Two pointer technique
- Sliding window
- Prefix sum (🔥 Most asked topic)

5️⃣ Strings
- Manipulation
- Palindrome problems
- Pattern matching

6️⃣ Hashing
- HashMap / Dictionary
- Frequency counting
- Fast lookup problems

7️⃣ Linked List
- Insert/delete operations
- Reverse list
- Fast & slow pointer

8️⃣ Stack & Queue
- LIFO / FIFO
- Valid parentheses
- Monotonic stack

9️⃣ Trees
- Binary tree traversal
- Binary Search Tree
- Recursion
- Tree depth / height (🔥 Very important)

🔟 Heap / Priority Queue
- Min / max heap
- Top K problems

1️⃣1️⃣ Graphs
- BFS / DFS
- Shortest path
- Cycle detection

🚀 ALGORITHMS (CORE INTERVIEW TOPICS)
1️⃣2️⃣ Searching Algorithms
- Linear search
- Binary search

1️⃣3️⃣ Sorting Algorithms
- Quick sort
- Merge sort
- Heap sort

1️⃣4️⃣ Recursion & Backtracking
- Subsets
- Permutations
- N-Queens

1️⃣5️⃣ Greedy Algorithms
- Activity selection
- Interval problems

1️⃣6️⃣ Dynamic Programming (DP)
- Memoization
- Tabulation
- Knapsack problems (🔥 Hard but high-value topic)

⚙️ INTERVIEW SKILLS
1️⃣7️⃣ Coding Patterns (Must Know ⭐)
- Two pointers
- Sliding window
- Fast & slow pointers
- Divide & conquer
- Backtracking
- BFS / DFS patterns

1️⃣8️⃣ Writing Clean Code
- Readable variable names
- Modular functions
- Handling edge cases

1️⃣9️⃣ Debugging Skills
- Test cases
- Dry run
- Error fixing

2️⃣0️⃣ Communication During Interview
- Explain approach first
- Think aloud
- Discuss complexity (🔥 Often ignored but important)

🌟 ADVANCED / TOP COMPANY PREP
2️⃣1️⃣ System Design Basics
- Scalability
- Load balancing
- Architecture concepts

2️⃣2️⃣ Object-Oriented Design
- Classes & objects
- Design principles
- Low-level design

2️⃣3️⃣ Competitive Programming (Optional)
- Codeforces
- LeetCode contests

⭐ Best Practice Platforms
- LeetCode ⭐
- HackerRank
- Codeforces
- GeeksforGeeks

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