A Structured 30-Day Coding Interview Preparation Plan

Coding assessments are the primary filter for software engineering roles. If you don't pass the online coding test, you won't get a chance to show your system design or communication skills.

Here is a structured, high-intensity 30-day plan to get you ready for technical coding rounds.

Day 1-7: Core Data Structures

Focus on understanding how data structures are stored in memory and their operations' time/space complexity:

• Arrays, Strings, and Two Pointers.
• Linked Lists (Reversal, cycle detection).
• Stacks and Queues (implementing queue using stacks, sliding window minimums).

Day 8-15: Searching, Sorting, and Trees

Master traversal algorithms and recursive thinking:

• Binary Search (mastering variants: searching in rotated sorted arrays, finding boundary values).
• Trees (Binary Tree traversals, Binary Search Tree validation, Lowest Common Ancestor).
• Graphs (BFS, DFS, finding connected components).

Day 16-25: Advanced Algorithms

Dive into patterns that appear frequently in FAANG/medium-hard problems:

• Recursion and Backtracking (N-Queens, subset generation).
• Dynamic Programming basics (Memoization vs Tabulation, Knapsack problem, Longest Common Subsequence).
• Heap and Greedy algorithms.

Day 26-30: Simulated Practice

Get used to coding under pressure:

• Set a timer: Give yourself exactly 30 minutes to solve a medium-level question.
• Practice without an IDE auto-complete: Write code in plain text editors to ensure syntax familiarity.
• Handle edge cases: Test your code with empty inputs, negative numbers, and extremely large numbers.

By breaking down your prep into this daily checklist and using the placement test portal on CareerCloneAI, you can systematically master DSA and confidently clear technical coding rounds.