CBSE Class 12 Computer Science Previous Year Question Papers (2022–2026)
Download every CBSE Class 12 Computer Science board paper from 2022–2026 as a free PDF, with the official CBSE marking scheme. Or practise all 282 questions online, one by one, with answers (190 have marking-scheme solutions).
Key facts
- Highest-weightage chapters: Python Revision & Functions (24.5 marks), Database & SQL (21.5 marks), Computer Networks (8.8 marks) on average per paper, across 4 board papers
- Paper pattern 2026-27: 70 marks, 37 questions in 5 sections; unchanged from 2025-26 (CBSE notice, 21 Sep 2026)
- Board papers available: 5 papers from 2022 to 2026 with official marking schemes, free PDF
- Practice questions: 282 questions, 190 with marking-scheme answers, free online
Class 12 Computer Science board papers with marking schemes
Two sets per year from different CBSE regions. Question papers are published by CBSE; click a PDF to download it free.
| Paper | Questions | Free download | Answers | Online |
|---|---|---|---|---|
| Board exam 2026 | 37 | Question paper PDF | Not published | Practise online |
| Board exam 2025 | 35 | Question paper PDF | Marking scheme PDF | Practise online |
| Board exam 2024 | 35 | Question paper PDF | Marking scheme PDF | Practise online |
| Board exam 2023 | 35 | Question paper PDF | Marking scheme PDF | Practise online |
| Board exam 2022 · Term 2 | 13 | Question paper PDF | Marking scheme PDF | Practise online |
Class 12 Computer Science sample paper 2026-27
CBSE released the 2026-27 Sample Question Paper on 21 September 2026 and confirmed there is no change in the question paper design for 2026-27. Practise it first: it shows exactly how your board paper will look.
| Paper | Questions | Free download | Answers | Online |
|---|---|---|---|---|
| Sample paper 2026-27 | 37 | Question paper PDF | Marking scheme PDF | Practise online |
Chapter-wise weightage (from 4 board papers)
Average marks each chapter carried per board paper. Start revision with the chapters at the top.
| Chapter | Share | Avg. marks per paper |
|---|---|---|
| Python Revision & Functions | 24.5 | |
| Database & SQL | 21.5 | |
| Computer Networks | 8.8 | |
| Exception & File Handling | 7.8 | |
| Data Structures (Stack) | 0.8 |
Most repeated Computer Science questions in CBSE board exams
The same question, or a near-identical one, appeared in more than one CBSE board exam year.
- State True or False : "A Python List must always contain all its elements of same data type."
Asked in 2025, 2026Python Revision & Functions1 mark - Expand ARPANET. Q. Nos. 20 and 2l are Assertion (A) and Reason (R) based questions. Mark the correct choice as (A) Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation for Assertion (A). (…
Asked in 2025, 2026Computer Networks2 marks - Expand the term XML. 1 Q. Nos. 20 and 21 are Assertion (A) and Reason (R) based questions. Mark the correct choice as : (A) Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation for Asserti…
Asked in 2025, 2026Computer Networks1 mark - State True or False : 1 In Python, data type of 74 is same as the data type of 74.0.
Asked in 2025, 2026General1 mark
Class 12 Computer Science paper pattern
Based on the sample paper 2026-27 (70 marks).
| Section | Questions | Marks |
|---|---|---|
| Section A | 21 × 1 mark | 21 |
| Section B | 7 × 2 marks | 14 |
| Section C | 3 × 3 marks | 9 |
| Section D | 4 × 4 marks | 16 |
| Section E | 2 × 5 marks | 10 |
CBSE additional practice papers for Class 12 Computer Science
| Paper | Questions | Free download | Answers | Online |
|---|---|---|---|---|
| Additional practice paper 2023-24 | 35 | Question paper PDF | Marking scheme PDF | Practise online |
| Additional practice paper 2021-22 | 55 | Question paper PDF | Not published | Practise online |
Frequently asked questions
Where can I download CBSE Class 12 Computer Science previous year question papers for free?
All CBSE Class 12 Computer Science board papers from 2022–2026 are listed on this page as free PDF downloads, together with the official marking schemes. You can also practise every question online in the free BoardPrep app.
Are marking schemes included with the Class 12 Computer Science papers?
Yes. The official CBSE marking scheme is linked next to each paper where CBSE has published it. In the app, 190 of the 282 questions show their marking-scheme answer.
Which chapters carry the most marks in Class 12 Computer Science?
In recent board papers the highest-weightage chapters were Python Revision & Functions, Database & SQL, Computer Networks. See the chapter-wise weightage table above for the full list.
Has the CBSE exam pattern changed for 2026-27?
No. CBSE's notification of 21 September 2026 says there is no change in the question paper design or assessment pattern for 2026-27, and the passing criteria stay the same as 2025-26.
Is BoardPrep free?
Yes. All papers, the question bank, the paper generator, mock tests and the Pattern Challenge are free to use.
Practise Class 12 Computer Science free
Question-wise practice with answers, chapter tests, board-pattern paper generator with PDF download, and a daily streak to keep you going.