CBSE Class 12 Computer Science Question Bank 2026-27
A complete question bank for CBSE Class XII Computer Science students, covering all 7 chapters of the syllabus using Python 3.x. Contains 281 questions across all chapters, every one followed by a complete answer with explanation. Includes 35 embedded diagrams and image-based questions throughout. Each chapter closes with a Key Terms summary box for quick revision.
Coverage — All 7 Chapters
Chapter 1 — Functions and Exception Handling: User-defined functions, types of arguments (positional, default, keyword, args/*kwargs), function return values, flow of execution, scope of variables (global/local), global keyword, exception handling with try-except-else-finally, built-in exceptions.
Chapter 2 — Computer Networks: ARPANET and Internet history, Networking devices, Topologies, LAN/WAN, Protocols, HTTP/SMTP/TCP.
Chapter 3 — File Handling and Stack: Text files, Binary files, CSV files, pickle module, seek/tell, Stack — PUSH/POP/PEEK implementation.
Chapter 4 — Database Management: RDBMS concepts, SQL DDL and DML, Joins, GROUP BY, Python–MySQL connectivity.
Chapter 5 — Strings and Lists: Indexing and slicing, all String methods, List methods, Linear Search.
Chapter 6 — Tuples, Dictionaries and Modules: Tuple operations, Dictionary methods, math/random/statistics modules.
Chapter 7 — Python Fundamentals: Data types, Operators, Type conversion, if/for/while control flow, Error types, Flowcharts.
Structure of Each Chapter
Every chapter follows the CBSE exam pattern across five sections: Section A — MCQs (1 mark each), Section B — Short Answer I (2 marks each), Section B — Short Answer II (3 marks each), Section C — Programming questions (4–5 marks each), and Section D — Long Answer questions (6 marks each). Every question is followed by a complete worked answer. Programming questions include full code with explanation. "Find the Output" and "Error Detection" questions are included throughout, in addition to write-a-program questions.
One Inconsistency to Note
The cover and table of contents correctly list 7 chapters. However, the preface states "this ebook covers all two chapters" — this is a clear copy-paste error from an earlier version. The actual content covers all 7 chapters.
How It's Designed to Be Used
Students are advised to write all code by hand before checking solutions, and to trace "Find the Output" questions line by line before reading the answer. The Key Terms box at the end of each chapter is recommended as a quick revision sheet before exams. The book is intended to supplement textbooks and classroom instruction, not replace them.
Disclaimer
This is an independent educational resource and is not affiliated with, endorsed by, or connected to CBSE or any government body. Python syntax and behaviour described is based on Python 3.x. Students are advised to cross-check all solutions and code with their subject teachers and official CBSE publications.
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Reviews
The questions and answers across all 7 chapters are genuinely useful and well structured. The preface error saying two chapters instead of seven is a bit jarring at first. But the actual content is thorough and worth the price.
All chapters are covered well and the question types match CBSE pattern. Some sections feel a bit densely formatted which makes reading on screen slightly tiring. Still very useful for board preparation at this price.
Works well for most of the syllabus. Stack chapter could have more variety in programming questions. Diagrams in networking section are helpful. Good value overall and still recommended for Class 12 CS prep.
try except else finally blocks with different scenarios as questions made the concept very clear. I was always confused about when to use else in exception handling. Not anymore.
Text files, binary files, CSV files, pickle module, seek and tell — all covered with practical questions. This chapter trips students up but the questions here made it very clear.
Find the Output and Error Detection questions are excellent. A few of the Long Answer model answers could benefit from slightly more elaboration. But considering Rs 49 for 281 questions this is still a strong purchase.
Python chapters are very thorough. The networking chapter has decent coverage but I felt it could have a few more questions given how much the topic covers. Otherwise a comprehensive and useful question bank.
All 7 chapters covered with complete answers and explanations. The section wise split into MCQs, short answers, and programming questions matches the CBSE pattern exactly. Very impressed at this price.
All argument types in functions — positional, default, keyword, args, kwargs — covered with questions. Scope of variables, global keyword, return values. Nothing missed in Chapter 1.
Every programming question has a full solution with code. The explanations are helpful. A few of the longer programs could use slightly more commenting but solutions are correct.