DSA, DBMS, OS, CN, OOPs — all in one place. Built by students who cleared Tier-1.
No fluff. Just what actually appears in interviews.
DSA
Data Structures & Algorithms
The only DSA sheet that teaches you patterns, not problems
653 LeetCode problems · 22 patterns · FAANG curated
DBMS / SQL
SQL Patterns + Database Theory
The DTA SQL Sheet — top 50 patterns + real company questions, organized by topic
122+ problems · 12 SQL patterns · Real company questions · FAANG curated
Computer Networks
Networking Fundamentals
TCP/IP, DNS, HTTP — the questions every interviewer loves to ask
50 MCQs · 7 topics · Instant answer + reasoning
Operating Systems
OS Concepts
Processes, threads, deadlocks — OS is 20% of every tech interview
50 MCQs · 6 topics · Instant answer + reasoning
OOPs
Object-Oriented Programming
Tricky Java OOPs MCQs — what separates interns from new grads
50 MCQs · 7 topics · Instant answer + reasoning
Aptitude
Quantitative & Logical Reasoning
Crack the first filter — aptitude that MNCs actually test
100 MCQs · 16 topics · Instant answer + reasoning
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