DSA · foundations
4 topics
Complexity thinking and the linear structures everything builds on.
time & space
13 problems
10 problems
8 problems
DSA · core patterns
6 topics
The patterns interviewers reach for again and again.
8 problems
8 problems
6 problems
10 problems
5 problems
10 problems
DSA · data structures & graphs
7 topics
Trees, heaps, tries, and graphs — the onsite bread and butter.
10 problems
8 problems
6 problems
14 problems
7 problems
4 problems
14 problems
DSA · DP & advanced
7 topics
Dynamic programming is the make-or-break topic for ₹30 LPA+.
8 problems
18 problems
6 problems
6 problems
5 problems
5 problems
4 problems
Aptitude · quantitative
13 topics
The online-assessment round that gates most placements. Speed + accuracy.
8 questions
8 questions
8 questions
8 questions
8 questions
8 questions
8 questions
8 questions
8 questions
8 questions
8 questions
8 questions
8 questions
Aptitude · reasoning, verbal & DI
10 topics
Logical reasoning, verbal ability, and data interpretation.
8 questions
8 questions
8 questions
8 questions
8 questions
8 questions
8 questions
8 questions
8 questions
8 questions
Core CS fundamentals
5 topics
What separates "can code" from "understands systems".
scheduling, deadlocks, memory
joins, normalization, transactions
TCP/IP, HTTP, DNS, TLS
cache, pipelining
System design & LLD
9 topics
Concept clarity and trade-offs — the unlock for higher bands.
sharding, replication
REST / GraphQL / gRPC
SQL & Python foundations
4 topics
The non-negotiables.
Storage & warehousing
4 topics
Where the data lives at scale.
partitioning, cost
S3/GCS
Ingestion & transformation
3 topics
Get data in and shape it.
the T in ELT
PySpark
Orchestration & streaming
4 topics
Run it reliably, in real time.
+ Dagster / Prefect
Debezium
Feed the AI stack
4 topics
The fastest-growing part of the role.
extraction, classification
Feast
Build proof of work
4 topics
Projects that signal seniority — deployed, tested, not tutorials.
issue → PR → review
Package your profile
4 topics
A non-brand-name profile has to make the signal obvious.
Sharpen for interviews
4 topics
Reps convert — DSA rounds, core CS, project deep-dive, design.
Apply & get the offer
4 topics
Off-campus, discovery is your job — and leverage beats one interview.
referrals convert best
Data Engineer
Move and shape data at scale — and build the ingestion and vector stores that feed ML and LLM systems. SQL + Python are in ~94% of postings.
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- Number system · 8 questionsPercentages · 8 questionsRatio & proportion · 8 questionsAverages & ages · 8 questionsTime, speed & distance · 8 questionsTrains, boats & streams · 8 questionsTime & work, pipes · 8 questionsProfit, loss & interest · 8 questionsMixtures & alligations · 8 questionsPermutations & combinations · 8 questionsProbability · 8 questionsProgressions · 8 questionsMensuration & geometry · 8 questions
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