Practicing topic-wise previous year questions (PYQs) is one of the best ways to crack the ISRO Computer Science. With focused quizzes under each subject, you can sharpen your concepts and track your progress efficiently.
Attempting topic-wise quizzes helps you in:
- Quickly find and work on weak areas.
- Builds your speed and accuracy through timed practice.
- Gives you a clear idea of question patterns and difficulty level.
Subject-wise ISRO CS Previous Year Questions
Use the direct links below to start quizzes for each topic. This article covers all of the subjects that are in syllabus of ISRO Computer Science.
1. Database Management System
DBMS typically features 3-4 questions in the exam, carrying a total of 5-7 marks. Below are the important topics along with previous year questions on these topics.
Topics | Quiz Link |
|---|---|
Functional Dependency & Decomposition | |
Key Concepts | |
ER Model | |
Relational Algebra | |
Tuple Calculus | |
SQL | |
Normalization & Normal Forms | |
File Organization | |
Indexing(B Tree/B+ Tree) | |
Transactions & Concurrency Control |
2. Operating System
In the GATE exam, Operating System usually appears with 4-6 questions, contributing 8-10 marks in total. Below, you’ll find key topics and their previous year questions.
Topics | Quiz Link |
|---|---|
Process & Threads | |
System Calls | |
CPU Scheduling | |
Concurrency & Synchronization | |
Deadlock | |
Memory Management | |
File System | |
Disk Scheduling |
3. C Programming
You can expect 2-3 questions from C Programming in the exam, adding up to 3-4 marks overall. The major topics and their PYQs are listed below.
Topics | Quiz Link |
|---|---|
Loops & Conditional | |
Storage Classes | |
Functions | |
Pointers | |
Recursion | |
Miscellaneous |
4. Data Structures
The Data Structures section generally has 3-5 questions in the exam, totaling 7-8 marks. Find the main topics and relevant previous year questions below.
Topics | Quiz Link |
|---|---|
Arrays | |
Stacks | |
Queues | |
Linked Lists | |
Trees | |
BST | |
Binary Heaps | |
Graphs | |
Hashing |
5. Algorithms
Typically, Algorithms accounts for 4-6 questions in the exam, with a combined weightage of 8-10 marks. Important topics and corresponding PYQs are given below.
Topics | Quiz Link |
|---|---|
Recurrence | |
Searching & Sorting | |
Complexity Analysis | |
Greedy & Divide‐and‐Conquer Approach | |
Minimum Spanning Trees & Shortest Path Algorithms | |
Dynamic Programming | |
Graph Traversals(DFS/BFS) | |
Miscellaneous |
6. Computer Networks
Computer Networks is often tested through 3-5 questions in the exam, worth a total of 6-8 marks. See below for key topics and their past year questions.
Topics | Quiz Link |
|---|---|
OSI & TCP/IP Protocol Stacks | |
Packet Switching | |
Flow & Error Control | |
Medium Access Control | |
Routing Protocols | |
Fragmentation | |
IP Addressing & IPV4 Header | |
CIDR Notation | |
Transport Layer : Flow & Congestion Control | |
UDP & TCP | |
Cryptography | Link! |
Miscellaneous |
7. Digital Logic
In most exams, 3-5 questions are asked from Digital Logic, amounting to 4-6 marks. Important topics and previous year questions are provided below.
Topics | Quiz Link |
|---|---|
Number System | |
Logic Gates | |
Boolean Algebra | |
Combinational Circuit | |
Minimization | |
Sequential Circuit |
8. Theory of Computation
The Theory of Computation portion commonly includes 3-4 questions, together making up 6-7 marks in the exam. Listed below are the crucial topics and their previous year questions.
Topics | Quiz Link |
|---|---|
Regular Expressions & Languages | |
Finite Automata | |
Context Free Grammars & Languages | |
Push Down Automata & Pumping Lemma | |
Closure Property / RELs & Turing Machines | |
Undecidability |
9. Compiler Design
You’ll usually find 2-3 Compiler Design questions in the exam, which together carry 4-6 marks. The following sections cover main topics and their PYQs.
Topics | Quiz Link |
|---|---|
Lexical Analysis | |
Parsing | |
SDT(Syntax-Directed Translation) | |
Intermediate Code Generation | |
Miscellaneous |
10. Computer Organization and Architecture
Computer Organization and Architecture questions generally number 5-7 in the exam, for a total of 7-9 marks. The list below contains major topics with previous year questions.
Topics | Quiz Link |
|---|---|
Machine Instructions & Addressing Modes | |
Pipelining, Hazards & ALU | |
Main Memory | |
Cache Memory | |
Secondary Storage &I/O Interface(DMA/Interrupt mode) | |
Floating Point |
11. Engineering Mathematics
Expect to see 3-5 questions on Engineering Mathematics in the exam, with a total mark value of 6-8. Important topics and their past year questions are mentioned below.
Topic | Quiz Link |
|---|---|
Linear Algebra | |
Calculus | |
Probability & Statistics |
12. Discrete Mathematics
The exam typically features 5-7 Discrete Mathematics questions, accounting for 8-10 marks. Below are the significant topics and previous year questions for your practice.
Topics | Quiz Link |
|---|---|
Logic | |
Set Theory | |
Relation & Functions | |
Group Theory | |
Graph Theory | |
Combinatorics |
13. General Aptitude
From General Aptitude 10 questions appear in the exam, contributing 15 marks overall. Main topics and their respective PYQs are listed below.
Topics | Quiz Link |
|---|---|
Quantitative Aptitude | |
Spatial Aptitude | |
Verbal Aptitude | |
Logical Aptitude |
Below are some other Miscellaneous Quiz Links related to GATE CS PYQs.