Paytm hub
Paytm Online Assessment
Overview
Paytm online assessment (OA) is the first hard filter for most fresher, campus, and off-campus SDE-style drives. This page covers the Paytm OA format, what happens after you clear it, sample Paytm OA questions with approaches, an 8-week prep plan, and mistakes that sink otherwise-strong candidates.
Patterns below are from student reports for 2025-2026. Platforms and section names can change by drive. Always confirm the college placement email for your window.
Paytm hiring flow after the OA
| Stage | What candidates report | What you must show |
|---|---|---|
| 1. Online assessment | Timed coding OA (often 2 problems) plus possible MCQ sections depending on drive | Correctness + reasonable complexity under time |
| 2. Technical interviews | DSA + core CS + projects | Explain approach, edge cases, complexity |
| 3. Later rounds | Managerial / HR | Depth beyond the OA pattern |
| 4. HR / offer | Role, location, CTC discussion | Consistency with resume |
Paytm Online Assessment format
Test structure
| Component | From student reports details |
|---|---|
| Platform | HackerRank / similar or internal |
| Duration | Often 60-120 minutes depending on sections |
| Question mix | Coding + occasional aptitude/tech MCQs in campus-style papers |
| Languages | Java, C++, Python |
| Scoring | Sectional cutoffs possible when MCQs exist; coding needs test-case pass |
| Advance rate | Selective; incomplete coding rarely advances |
What makes Paytm OA feel distinct
- Fintech flavor: wallets, merchants, offers, transaction streams
- Some drives feel closer to mixed campus papers (MCQ + coding) than pure FAANG OA
- Still expect solid DSA for SDE roles
- Read the invite carefully for section count
Question types you should expect
Core DSA
- Arrays, strings, hashing
- Sliding window on transaction streams
- Greedy + sorting
- Basic DP
- Trees/graphs at medium level
Secondary / role-dependent
- Quant / logical MCQs on some campus papers
- Output-based / OOPs MCQs
What usually does not appear in the OA
- Full payments architecture whiteboarding (later)
- Long essay writing
- Hardware design
Sample Paytm Online Assessment questions
Question 1: cashback window
Q: Transactions with timestamps and amounts; sum cashback for purchases inside a promotional window.
Filter by time, apply percentage caps carefully, watch integer rounding rules stated in the problem.
Question 2: first unique transaction in a stream
Q: Return the first non-repeating transaction ID in a stream.
Queue + frequency map (classic first unique character pattern generalized).
Question 3: merchant rating aggregation
Q: Given ratings stream, maintain average after each update efficiently.
Keep sum and count. For sliding-window averages, evict old ratings from a queue.
Question 4: balanced brackets in offer codes
Q: Validate strings with multiple bracket types.
Stack matching. Easy warm-up that still appears in mixed papers.
Question 5: minimum platforms / concurrent sessions
Q: Given login/logout times, find maximum concurrent users.
Sweep line on events. Same family as meeting rooms / platforms.
Question 6: knapsack-lite wallet offers
Q: Pick offers with costs and values under budget W.
0/1 knapsack DP when n*W fits; greedy only if problem allows fractional or special structure.
How to prepare for Paytm OA (8-week plan)
| Weeks | Focus | Exit criteria |
|---|---|---|
| 1-2 | Arrays, hashing, two pointers, sliding window | 40+ easy/medium solved cleanly |
| 3-4 | Trees, graphs (BFS/DFS), heaps | Can code BFS/DFS without notes |
| 5-6 | DP + greedy patterns (keep light aptitude warm if your invite lists MCQs) | 25+ medium DP/greedy with recursion to bottom-up |
| 7 | Timed full mocks matching Often 60-120 minutes depending on sections | Finish both coding greens + safe MCQ accuracy if applicable with passing tests |
| 8 | Weak-topic repair + complexity review | Re-solve every miss within 48 hours |
Daily loop
- One timed medium problem (45-60 min hard cap)
- Write complexity and 3 edge cases before coding
- If stuck past 20 minutes, peek pattern name only, then re-solve tomorrow cold
- Log misses by topic on a simple sheet
Company pages on this site
- Paytm coding questions
- Paytm aptitude / mock quiz
- Paytm interview experience
- Paytm preparation guide
- Practice PDF: Paytm Placement Papers PDF (2026)
Common mistakes on Paytm OA
- Preparing only coding when your invite includes aptitude MCQs
- Preparing only aptitude for an SDE coding OA
- Integer overflow on money/points style sums
- Off-by-one on offer-window problems
- No revision of core CS for interviews after OA
Day-of checklist
- Stable internet, charged laptop, quiet room
- Confirm language template compiles on the platform before starting hard problems
- Skim all problems for 3-4 minutes, order by familiarity
- Submit a correct brute force early if constraints allow, then optimize
- Leave 8-10 minutes for edge-case tests you invent yourself