CBSE Class 12 Computer Science Important Questions
CBSE Class 12 Computer Science important questions for the 2027 board exam, with unit-wise marks for 2026-27, chapter-wise practice links and tips.
CBSE Class 12 Computer Science for the 2027 board exam: which units carry the most marks, where to find chapter-wise important questions, and how to practise them.
Chapter-wise important questions with answers are on our CBSE Class 12 Computer Science important questions page.
Unit-Wise Marks (2026-27)
| Unit | Marks |
|---|---|
| Computational Thinking and Programming – 2 | 40 |
| Computer Networks | 10 |
| Database Management | 20 |
| Total (theory) | 70 |
Source: CBSE Class 12 Computer Science syllabus 2026-27 (cbseacademic.nic.in).
How to Practise Important Questions
- Start with the biggest units — they carry the most marks.
- Solve without looking at solutions first — this builds real exam confidence.
- Time yourself — practise under exam conditions.
- Mark questions you get wrong — revise these again 2–3 days before the exam.
Practise Computer Science chapter-wise
Super Tutor has chapter-wise Computer Science practice quizzes with answers for CBSE Class 12.
Try it freePreparation Strategy for CBSE Computer Science
- Write Python programs by hand — board exams need handwritten code.
- Practise file handling (text, binary and CSV files) and the stack data structure.
- Practise SQL queries of every type in the syllabus, and Python–SQL connectivity.
- Revise networking terms, devices and topologies.
Exam Tips for CBSE Class 12 Computer Science
- Read every question twice before writing code.
- Write neat, correctly indented code — examiners must be able to follow it.
- Attempt all questions — there is no negative marking in board exams.
- Keep 15 minutes for revision — recheck syntax and expected output.
Unit-wise marks from the CBSE Class 12 Computer Science syllabus 2026-27 (cbseacademic.nic.in).
Turn this into exam marks
Super Tutor gives you chapter summaries, revision notes, practice quizzes and an AI doubt solver matched to your board syllabus — so you revise smarter, not longer.
Start freeFrequently Asked Questions
Which chapters carry the most marks in CBSE Class 12 Computer Science?
In the CBSE Class 12 Computer Science syllabus 2026-27, the biggest units are Computational Thinking and Programming – 2 (40 marks), Database Management (20 marks), Computer Networks (10 marks). The full unit-wise split is in the table on this page.
Is NCERT enough for CBSE Class 12 Computer Science?
NCERT textbooks are the prescribed books for CBSE, and board questions are built on them. Finish every NCERT example and exercise first, then practise sample papers and previous year papers.
How many days are enough to prepare for CBSE Class 12 Computer Science?
With focused preparation, 30–45 days if you have already studied the syllabus once. Give Computer Science 2–3 hours a day, and in the last week focus only on revision and past papers. Starting earlier is always better.
What are the most repeated questions in CBSE Computer Science?
Certain question types come up regularly — writing programs, predicting output, finding errors, SQL queries and theory definitions. Solving the last few years' papers and the latest sample or specimen paper shows you these patterns.