Impacteers Blog
Tech Career Insights & Tutorials
Hash Map and Hash Table Interview Guide: Every Pattern and Problem for Product Company Rounds
The complete HashMap and Hashing interview guide for product company rounds — covering frequency maps, prefix sum, Two Sum family and 15 company-tagged problems.
Merge Intervals Pattern: The Complete Guide to Solving Interval Problems in Product Company Interviews
Master the Merge Intervals DSA pattern — covering 6 interval problem variants asked at Google, Amazon and Flipkart in India with Python code and complexity analysis.
Data Structures Interview Questions and Answers: The Complete 2025 Guide for Working Engineers
The complete data structures interview guide for product company rounds in India — Arrays, Linked Lists, Trees, Graphs, Heaps, HashMaps — with real company tags and complexity analysis.
Top 100 LeetCode Problems for MAANG Interviews: Frequency-Ranked with Patterns and Solutions India 2025
The 100 most frequently asked LeetCode problems in Amazon, Google, Flipkart and Swiggy interviews in India — ranked by frequency, tagged by pattern and company.
String Interview Questions: Every Pattern, Problem and Approach Explained for Product Company Rounds
The complete string interview guide for product company rounds — covering Sliding Window, Two Pointers, HashMap, DP and Trie patterns with 20 company-tagged problems.
Array Interview Questions and Answers: The 30 Most Asked in Product Company Interviews India 2025
The 30 most asked array interview questions at Amazon, Google, Flipkart and other product companies in India — with optimal solutions, complexity analysis and company tags.
What is DSA? Why Now Is the Right Time to Learn DSA Programming
DSA stands for Data Structures and Algorithms — the skill tested at every product company interview. Complete guide covering what DSA is, why 2025 is the right time, Segment Tree vs Fenwick Tree, and a 24-week roadmap for working tech professionals in India.
Segment Trees and Fenwick Trees: When to Use Each and How to Explain Them in an Interview
Segment Trees and Fenwick Trees keep appearing in Staff Engineer and MAANG interview rounds. Learn when to use each, the 5 key problems, and how to explain your choice under pressure. FutureJobs.
Backtracking Problems for Product Company Interviews: The 5 Patterns You Cannot Ignore
Freezing on backtracking problems despite years of coding experience? Here's the universal template and the 5 patterns — subsets, permutations, combinations, path-finding, constraint satisfaction — explained for senior engineers targeting MAANG.
Why Service Engineers Fail MAANG DSA Rounds — And What to Do Instead
Solved 200 LeetCodes and still failing the DSA round? These 4 specific gaps explain why — and each one has a structured fix. FutureJobs built the prep for working engineers.
Union-Find and Disjoint Set: The DSA Pattern That Unlocks Graph Problems in Product Interviews
Master Union-Find and Disjoint Set Union for product company interviews. Learn path compression, rank optimisation, and the 5 canonical problems that appear in MAANG rounds. FutureJobs by Impacteers.
How to Study DSA with Only 1 Hour a Day: A Structured Plan for Working Engineers in India
Can you crack MAANG DSA interviews studying just 1 hour a day? Yes — if it's structured. Here's the exact week-by-week plan for working engineers in India. FutureJobs by Impacteers.
Monotonic Stack and Queue: The Hidden DSA Pattern That Keeps Appearing in Flipkart and Uber Interviews
Monotonic stack and queue problems keep appearing in Flipkart, Uber, and Swiggy interviews. Learn the pattern, the 5 key problems, and how to recognise it mid-interview. FutureJobs by Impacteers.
Dynamic Programming Deep Dive: How to Think, Pattern-Match and Solve DP Problems in Product Company Interviews
The complete guide to dynamic programming for product company interviews — 6 DP patterns, worked examples in Python and Java, and how to stop guessing and start recognising.
Engineering Manager to Staff Engineer: The Month-by-Month DSA Comeback Plan for Returning ICs
Haven't touched DSA in 2–3 years? Here is the month-by-month plan for engineering managers returning to Staff/Principal IC roles — without starting from scratch.
Microsoft India Interview Process 2026: Round-by-Round Guide for Software Engineers
Everything you need to know about Microsoft India SDE interviews in 2026 — rounds, DSA topics, system design expectations, compensation, and how to prepare.
How to Crack Product Company Interviews from Scratch: The 30-60-90 Day DSA Plan for Early-Career Engineers
No DSA foundation? Here is the exact 30-60-90 day plan to go from basics to product company interview-ready — topics, daily targets, and what to do when you get stuck.
How to Design a Scalable Search Autocomplete System: System Design Walkthrough for Product Interviews
Design a scalable search autocomplete system for Google or Amazon interviews. Full walkthrough — Trie vs Redis vs Elasticsearch, latency trade-offs, and what senior interviewers are actually evaluating. FutureJobs.
How to Switch from a Service Company to a Product Company in India: The 2026 Playbook
The gap between ₹6.8L at TCS and ₹18L at Swiggy is a skill gap, not a talent gap. Here's the exact 5-month roadmap for working engineers to close it. FutureJobs built it.
