Month 3: Simulation & Polish (Days 61-90)

0/3 in this phase0/52 across the roadmap

📖 Concept

Month 3 goal: Full interview simulation, polish weak areas, build confidence. Focus shifts from learning to performing under interview conditions.

Daily schedule (3-4 hours/day):

Morning (2 hours):
  - Mock interview simulation (45 min) OR
  - 2 LeetCode problems timed (45 min)
  - Review and reflect (30 min)
  - Weak area deep dive (45 min)

Evening (1.5 hours):
  - System design mock (3x/week) OR
  - Behavioral mock (2x/week)
  - Polish Android knowledge gaps (remaining time)

Week 9-10: Full Mock Interviews

Schedule 2 mock interviews per week with peers
Practice the full Google interview loop:
- Round 1: Coding (45 min)
- Round 2: Coding (45 min)
- Round 3: Android deep dive (45 min)
- Round 4: System design (45 min)
- Round 5: Googleyness & Leadership (45 min)

Week 11: Targeted Weakness Training

Review mock interview feedback
Identify top 3 weak areas
Dedicate extra time to those areas
Re-do previously failed problems

Week 12: Final Preparation

Light practice only — avoid burnout
Review STAR stories (speak aloud)
Review core DSA patterns (recognition, not solving)
Review Android architecture cheat sheet
Rest well, exercise, eat well

Pre-interview checklist:

□ Can solve most medium problems in 20-25 min
□ Can identify DSA patterns within 3 min
□ Can lead a system design discussion for 45 min
□ Have 8 behavioral stories ready (can tell each in 2 min)
□ Can explain Android internals at framework level
□ Can discuss architecture trade-offs confidently
□ Slept 8 hours the night before
□ Know the interview schedule and format

💻 Code Example

codeTap to expand ⛶

1// Final week: Quick reference cheat sheet
2
3/*
4DSA PATTERN QUICK REFERENCE:
5━━━━━━━━━━━━━━━━━━━━━━━━━━━
6"Subarray/substring with condition" → Sliding Window
7"Sorted array, find pair" → Two Pointers
8"Shortest path, minimum steps" → BFS
9"All combinations/permutations" → Backtracking
10"Optimal (min/max) + choices" → DP
11"Sorted, find target" → Binary Search
12"Next greater/smaller" → Monotonic Stack
13"Connected components" → Union-Find / BFS
14"Top-K elements" → Min-heap of size K
15"Stream + running median" → Two heaps (max+min)
16
17ANDROID DEEP-DIVE CHEAT SHEET:
18━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
19Lifecycle: onCreate→onStart→onResume→onPause→onStop→onDestroy
20Process death: Only SavedStateHandle/Bundle/Room survives
21Coroutines: CPS transformation, state machine, Continuation
22Flow: Cold (per-collector) vs Hot (shared, always active)
23MVVM: View ← observes ← ViewModel ← Repository ← DataSource
24Hilt: @HiltAndroidApp → @AndroidEntryPoint → @HiltViewModel → @Inject
25Compose: Recomposition skipping via @Stable/@Immutable
26Performance: 16.6ms frame budget, Baseline Profiles, R8
27
28SYSTEM DESIGN TEMPLATE:
29━━━━━━━━━━━━━━━━━━━━━━
301. Requirements (functional + non-functional)
312. High-level architecture (draw boxes)
323. Data model (Room entities)
334. API contracts (REST endpoints)
345. Sync strategy (offline-first, delta sync)
356. Trade-offs (always discuss 2+ options)
367. Failure modes (network, process death, conflicts)
37
38BEHAVIORAL STAR TEMPLATE:
39━━━━━━━━━━━━━━━━━━━━━━━
40S: 1-2 sentences of context
41T: What was YOUR responsibility
42A: 3-5 specific actions YOU took
43R: Quantifiable result + lesson learned
44Keep under 2 minutes when speaking
45*/

🏋️ Practice Exercise

Final 30-Day Practice Plan:

Week 9 (Days 61-67): Full Simulation

2 full mock interviews with peers
Solve 10 random medium/hard timed problems
System design: Design Google Maps routing
Behavioral: Practice 4 stories with timer

Week 10 (Days 68-74): Intensify

2 more full mock interviews
Solve 10 more problems (focus on weak patterns)
System design: Design YouTube video feed
Behavioral: Practice remaining 4 stories

Week 11 (Days 75-81): Targeted Training

Analyze all mock feedback — what patterns do you miss?
Spend 60% of time on identified weak areas
Re-solve 10 previously failed problems
1 final full mock interview

Week 12 (Days 82-90): Taper & Rest

Light practice: 1 problem per day (stay sharp, not exhausting)
Review pattern cheat sheet daily (5 min)
Review STAR stories (speak aloud, 10 min)
Focus on sleep, exercise, nutrition
Day 89: Last light review
Day 90: Interview day — you're ready!

⚠️ Common Mistakes

Cramming the night before — this is a marathon, not a sprint. Rest is critical for performance.
Not doing mock interviews — self-practice doesn't replicate the pressure of a real interview
Ignoring behavioral prep in the final month — G&L is 20% of the hiring decision at senior level
Not tracking and targeting weak areas — generic practice in Month 3 is inefficient

💼 Interview Questions

🎤 Mock Interview

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