CSS Past Papers 2020
Download Past Papers of Computer Science In CSS. The CSS Computer Science Paper 2020 is a valuable resource for aspirants aiming to appear in the CSS exams. This paper reflects not just the expected syllabus coverage but also the pattern, depth, and analytical approach required by FPSC.

Below is a comprehensive breakdown of the Past Papers of Computer Science in CSS, covering the paper’s structure, major topics, preparation strategy, and helpful study sources.
Overview of Past Papers of Computer Science In CSS
The paper consisted of two sections:
- Section I (Objective): MCQs
- Section II (Subjective): Descriptive Questions
Total Marks: 100
Time Allowed: 3 hours
Paper Format: Attempt any FOUR questions from Section II. All questions carry equal marks.
Key Topics Covered in 2020 Paper
Here’s a list of major subject areas that appeared in the 2020 Past Paper of Computer Science in CSS:
Software Engineering
- Software development life cycle (SDLC)
- Software process models
- Risk analysis in software project management
Computer Networks
- TCP/IP and OSI model differences
- Routing protocols (Distance Vector vs. Link State)
- Internet layers and their functions
Databases
- ER diagrams and normalization
- Relational algebra
- SQL query writing and optimization
Programming Concepts
- Object-oriented programming (OOP)
- Difference between procedural and OOP
- Exception handling and file handling
Operating Systems
- Process scheduling algorithms
- Deadlock conditions and prevention
- Memory management techniques
Discrete Mathematics & Automata
- Propositional logic
- DFA/NFA construction
- Regular expressions
About the CSS
The CSS (Central Superior Services) Competitive Examination is a rigorous federal level test administered by the Federal Public Service Commission (FPSC) to select candidates for prestigious civil service roles across Pakistan. The exam’s rules and regulations, covering age limits, eligibility, subjects, and quotas, are detailed in the official CSS Rules section on the FPSC’s website.
The CSS Exam Rules, issued by FPSC Pakistan, outline eligibility criteria, age limits (21–30 years), and a maximum of three attempts for candidates. The exam includes written tests, a medical exam, a psychological assessment, and an interview. Rules also define quotas, disqualification grounds, and subject selection for a fair recruitment process.
Recommended Study Sources
Use the following sources for in-depth preparation:
Books
- Computer Science: A Structured Programming Approach Using C for basic programming concepts.
- Computer Networking: A Top Down Approach by Kurose and Ross
- Operating System Concepts by Silberschatz, Galvin, and Gagne
- Fundamentals of Database Systems by Elmasri & Navathe
- Software Engineering by Ian Sommerville
- Discrete Mathematics and Its Applications by Kenneth Rosen
Paper Attempting Strategy
To perform well in CSS Computer Science, follow this approach:
- Understand concepts instead of memorizing.
- Prepare diagrams and flowcharts; they give clarity and help in scoring better.
- Time management: divide equal time for each long question.
- Practice previous year papers for question pattern recognition.
Download Section
You can download the Past Papers of Computer Science in CSS 2020 (PDF) from the link below. This paper will help you understand the exam pattern, frequently asked topics, and the depth of conceptual understanding expected by FPSC.
Ensure you review the paper thoroughly and use it alongside the study sources recommended above.
