CBSE Class 12 Computer Science Important Questions 2026: Ultimate Guide for Board Exam Success
- Divya Shinde
- 10 hours ago
- 5 min read
Preparing for the CBSE Class 12 Computer Science Important Questions 2026 is one of the most effective strategies to score high in your board exam. As the academic year progresses and boards draw closer, understanding what to study, how to prepare, and which questions are most likely to appear becomes critical. This comprehensive guide will help you streamline your preparation, avoid guesswork, and focus on high-yield topics that can significantly boost your performance.
This blog is optimized for both students and educators looking for a focused and reliable source of important questions for CBSE Class 12 Computer Science Important Questions 2026.
Why Focus on CBSE Class 12 Computer Science Important Questions 2026?
Board examinations often test concepts that are repeatedly highlighted in the syllabus and previous years’ questions. When you prepare the CBSE Class 12 Computer Science Important Questions 2026, you are essentially prioritizing questions that:
Are frequently asked in past board exams
Cover high-weightage chapters
Reflect recent pattern changes recommended by CBSE
Help you revise the entire syllabus efficiently
The objective is not to memorize questions but to understand concepts deeply so you can apply your knowledge in any variation of questions that may appear.
CBSE Class 12 Computer Science Exam Pattern (2026)
Understanding the exam pattern is the first step in strategic preparation.
Section | Type of Questions | Marks | Total |
A | Very Short Answer (VSA) | 1 mark each | 20 |
B | Short Answer (SA) | 2–3 marks each | 30 |
C | Long Answer/Programming | 4–5 marks each | 30 |
Project | Practical/Project work | 20 | 20 |
Total | 100 |
The exam is divided into theory and programming sections, making it essential to prepare both logically and practically.
Latest Syllabus (As Per CBSE 2026 Guidelines)
The syllabus for CBSE Class 12 Computer Science Important Questions 2026 includes the following units:
Unit 1: Computational Thinking and Programming
Problem solving using programming
Python basics
Data structures (lists, tuples, dictionaries)
Unit 2: Computer Networks
Networking fundamentals
Protocols like TCP/IP, OSI model
Network types and topologies
Unit 3: Database Management
SQL commands and queries
Database design and normalization
Unit 4: Society, Law & Ethics
Cybersecurity
Digital footprints
Intellectual property rights
Each of these units carries weight in both theoretical questions and practical programming problems.
Top High-Weightage Chapters for CBSE Class 12 Computer Science Important Questions 2026
Here are the chapters that have historically appeared with high marks in board exams:
Python Data Structures (Lists, Tuples, Dictionaries)
SQL Queries and Database Handling
Functions and OOP Concepts in Python
Networking Basics and Protocols
Cyber Ethics and Laws
File Handling in Python
These chapters should be your priority when practicing important questions. They are most likely to appear in the CBSE Class 12 Computer Science Important Questions 2026 list.
Chapter-Wise Important Questions for CBSE Class 12 Computer Science Important Questions 2026
Below is a chapter-wise list of sample important questions curated based on recent trends and past board papers.
Chapter 1: Computational Thinking and Python Basics
What is the difference between a list and a tuple in Python?
Write a Python program to find the largest number in a list.
Define recursion with an example in Python.
Focus Concepts: Lists, Tuples, Functions, Recursion
Chapter 2: More on Python – Data Handling
Explain how dictionaries are used in Python with an example.
Write a Python program to sort a dictionary by its values.
Differentiate between shallow copy and deep copy.
Focus Concepts: Dictionaries, Data manipulation
Chapter 3: Database Management – SQL
Write SQL queries to:
Create a table
Delete records based on a specific condition
Display records in descending order
Explain different types of joins in SQL with examples.
Focus Concepts: DDL, DML, Joins, Constraints
Chapter 4: Computer Networks
What are the differences between LAN, MAN, and WAN?
Explain the OSI model with functions of each layer.
What is a protocol? Give two examples of network protocols.
Focus Concepts: OSI Model, Protocols, Types of Networks
Chapter 5: Cyber Law and Ethics
Define cyber ethics and discuss its importance.
What is a digital footprint? How can one protect it?
Discuss legal consequences of software piracy.
Focus Concepts: Digital laws, ethical computing
Chapter 6: File Handling in Python
Write a program to open a text file and count the number of words.
Differentiate between text mode and binary mode in file handling.
Focus Concepts: File read/write, modes of file handling
How to Use These Important Questions Effectively
Simply reading important questions will not guarantee success. Here’s how you should study:
1. Daily Practice
Set a goal to solve 20–30 questions every day from the list. Focus on understanding the concept behind each question.
2. Revision Notes
Make short notes of key concepts, syntax, and errors you commonly make. These notes are crucial for last-minute revision.
3. Solve Sample Papers
CBSE releases sample papers every year. Solve them under exam conditions to improve speed and accuracy.
4. Work on Projects
The internal assessment (project) carries 20 marks. A well-executed project can significantly boost your overall score.
5. Group Study
Discussing tricky problems with peers can deepen your understanding and uncover mistakes you may not notice on your own.
Tips and Strategies to Score 90+ in Computer Science Boards
Understand the Marking Scheme
Read the latest marking scheme released by CBSE. It tells you how marks are distributed and which sections are scoring the most.
Memorize Only Key Concepts
Rather than memorizing entire programs, focus on understanding logic and syntax rules. This will help you write correct programs even for twisted questions.
Practice Python Programs
The practical aspect of Python is unavoidable. Write and run your programs in an IDE to ensure they are error-free.
Time Management
During exams, attempt questions you are confident about first. Allocate time to each section and stick to it rigorously.
Focus on SQL
SQL queries often carry 10–12 marks across short and long answer types. Practice all types of SQL queries repeatedly.
Frequently Asked Questions (FAQ)
Q1: What are the CBSE Class 12 Computer Science Important Questions 2026 that have the highest chances of appearing in the board exam?
Answer: High-probability questions usually come from Python data structures (lists, tuples), SQL queries, networking basics, and cyber law topics. Focus on programs involving list manipulation, dictionary operations, SQL joins, and Python functions as these areas are repeatedly tested in past years’ papers.
Q2: How should I prepare the CBSE Class 12 Computer Science Important Questions 2026 if I am weak in programming?
Answer: Start with understanding basic Python syntax and logic. Break programs into smaller parts and write simple code snippets. Use online IDEs and debug errors as they arise. Gradually move to complex programs once you are comfortable.
Q3: Are Python file handling and OOP part of CBSE Class 12 Computer Science Important Questions 2026?
Answer: Yes. File handling and Object-Oriented Programming (OOP) concepts frequently appear in board exams. Questions often involve reading/writing files and class-based programs.
Q4: Can practicing past year question papers help in cracking CBSE Class 12 Computer Science Important Questions 2026?
Answer: Absolutely. Past year papers provide insight into question trends, difficulty levels, and frequently repeated topics. Practicing them will help in time management and answer accuracy.
Q5: How many marks can I expect from SQL and Database Management alone in the CBSE Class 12 Computer Science paper?
Answer: SQL and Database Management questions typically carry 10–15 marks distributed across short and long answer formats. Mastering SQL can significantly boost your total score.
Conclusion
In the journey toward cracking the CBSE Class 12 Computer Science Important Questions 2026, consistent practice and smart strategies are the keys to success. Prioritize high-yield topics like Python data structures, SQL queries, and computer networks. Work through chapter-wise important questions, solve sample papers, and reinforce your learning through revision notes.
Remember: Understanding concepts deeply beats rote memorization — especially in Computer Science where problem-solving and logical reasoning matter most.
Start preparing today with focused effort, and make the most of every study session. Your dedication now can lead to excellent performance in your 2026 board exam.
Good luck!
Official CBSE Resources for Class 12 Computer Science 2026
CBSE Official Website (Notifications & Circulars) https://www.cbse.gov.in
CBSE Academic Portal (Syllabus, Sample Papers & Curriculum) https://cbseacademic.nic.in