Technical Interview Preparation Checklist for 2026

The 2026 Technical Interview Landscape

Technical interviews have evolved. In 2026, most top-tier companies run:

1. Online Assessment (OA) — 2 LeetCode-style problems, 60-90 minutes

2. Technical Phone Screen — 1 coding problem + discussion, 45 minutes

3. System Design — for senior engineers (3+ years), 45-60 minutes

4. Behavioral / Leadership — 30-45 minutes (often STAR format)

5. Hiring Committee Review — internal at FAANG; the final hurdle

The specific composition depends on the company and level.

DSA: What to Actually Study

For most product company roles (Google, Amazon, Flipkart, Razorpay), you need:

Must master (high frequency):

• •Arrays and strings (2-pointer, sliding window)
• •Hash maps and hash sets
• •Trees and graphs (BFS/DFS, shortest path)
• •Dynamic programming (DP) — subset problems, knapsack, LCS
• •Recursion and backtracking

High value (worth knowing):

• •Heaps / priority queues (streaming problems, k-th largest)
• •Binary search (on answer, not just sorted arrays)
• •Linked lists (reversal, cycle detection)
• •Stack and queue patterns (monotonic stack)
• •Trie (string problems at faang level)

Low ROI for time spent:

• •Segment trees, Fenwick trees — unless applying for competitive-programming-heavy roles
• •Advanced graph algorithms (Dijkstra is enough for most)
• •Red-black trees / AVL trees

Target LeetCode level: 20-30 Medium + 5-10 Hard problems solved, with clean solutions you can explain.

The Coding Interview Framework (Use Every Time)

1. Clarify — ask 2-3 clarifying questions. Edge cases, constraints, expected input types. This signals systematic thinking.

2. Think aloud — narrate your approach before coding. Interviewers want to see your thought process.

3. Brute force first — propose the O(n²) solution, then optimize. Never skip straight to a complex solution you can't explain.

4. Code cleanly — meaningful variable names, modular logic, handle edge cases.

5. Trace through — manually run your solution on the example input before submitting.

6. Analyze complexity — always state time and space complexity unprompted.

System Design: The Scope for Different Levels

0-3 years: You won't get system design usually. Focus on DSA + behavioral.

3-6 years (SDE-2 / Senior): Design URL shortener, rate limiter, notification system, simple key-value store. Focus on: API design, basic scaling, database choice, caching layer.

6+ years (Staff / Principal): Design Twitter/Instagram feed, distributed cache, ride-sharing matching, payment system. Focus on: consistency vs availability trade-offs, sharding strategies, data models at scale, failure modes.

Core concepts to know: Load balancing (horizontal scaling), CDN, database sharding and replication, caching patterns (write-through, write-behind, cache-aside), message queues (when and why), CAP theorem (practical implications), SQL vs NoSQL trade-offs.

8-Week Study Plan

Weeks 1-2: 2 LeetCode problems/day. Arrays, strings, hash maps only.

Weeks 3-4: 2 problems/day. Trees, graphs, recursion.

Weeks 5-6: 1 DP problem/day + 1 review problem. Behavioral story bank (write 8 STAR stories).

Week 7: 2 mock interviews (Pramp, Interviewing.io, or with a friend). System design reading (if applicable).

Week 8: Light review only. Sleep. Interview.

Behavioral Preparation (Often Ignored)

Behavioral rounds eliminate 20-30% of otherwise qualified candidates. Prepare:

• •"Tell me about a time you disagreed with your team"
• •"Tell me about your biggest failure"
• •"Tell me about a time you had to influence without authority"
• •"Why this company / why now?"

Use the Interview Prep generator to get 10 role-specific questions and practice answers.

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