Chapter practice
Board Exam 2026 - High Priority MCQs with Detailed Answers
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CBSE Class 12 Computer Science Questions
CBSE Class 12 Computer Science Questions sits in the CBSE / Board cluster. Keep this tab for this topic; open linked pages for neighbouring chapters or exams.
These questions follow the classroom chapter, not a government-job paper. Use them for revision before school tests and for strengthening the same NCERT ideas that later appear in NDA or SSC science.
CBSE Class 12 Computer Science Questions is grouped under CBSE / Board for CBSE and state board classes. Use the related links to continue the same cluster instead of leaving the topic after one page.
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Q1. What is the difference between RAM and ROM?
RAM is volatile memory used for temporary storage, whereas ROM is non-volatile memory used for permanent instructions required for booting.
Q2. Define Encapsulation.
Encapsulation is the process of wrapping data and functions into a single unit called a class.
Q3. What is a Database?
A database is an organized collection of structured data managed by a DBMS.
Q4. What is DBMS?
DBMS stands for Database Management System, used to store, retrieve, and manage data efficiently.
Q5. What is a Primary Key?
A primary key uniquely identifies each record in a table, and it cannot be NULL.
Q6. Explain the term ‘Inheritance’.
Inheritance allows one class to acquire properties and methods of another class.
Q7. What is Cloud Computing?
Cloud computing refers to delivering computing services over the internet such as storage, servers, and databases.
Q8. What is a Computer Network?
A computer network is a group of interconnected computers that share resources and information.
Q9. What is HTTP?
HTTP stands for HyperText Transfer Protocol, used for transferring web pages over the internet.
Q10. What is a Firewall?
A firewall is a security system that monitors and controls incoming and outgoing network traffic.
Q11. What is a Function in Python?
A function is a block of reusable code that performs a specific task.
Q12. Define Recursion.
Recursion is a method where a function calls itself to solve a problem.
Q13. What is CSV file?
A CSV file (Comma Separated Values) stores data in tabular form using commas as separators.
Q14. What is SQL?
SQL stands for Structured Query Language used for managing databases.
Q15. Write the use of ORDER BY in SQL.
ORDER BY is used to sort the records in ascending or descending order.
Q16. What is Cyber Crime?
Cyber crime refers to illegal activities performed using digital devices and networks.
Q17. What is a Tuple in Python?
A tuple is an immutable ordered collection of elements in Python.
Q18. Explain POP in Python.
pop() removes and returns an element from a list at the specified index.
Q19. What is Artificial Intelligence?
AI is the simulation of human intelligence in machines to perform tasks like learning and decision-making.
Q20. What is Big Data?
Big data refers to extremely large datasets that require advanced tools and technologies to process.
Board practice that also helps later exams
NCERT answers are the source for many competitive science and geography questions. Finishing this set well is useful for both the school exam and later SSC/NDA papers.
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Frequently asked questions
Are these questions in the board pattern?
Yes. This is chapter-focused CBSE / NCERT practice with answers. Use it for school tests and board revision. Competitive exams later ask many of the same facts as short MCQs.
Should I only read answers or write them first?
Cover the answer, write your own line, then open the solution. Definitions stick when you use NCERT words. For numericals, list u, v, a, t, s before picking a formula.
Is this enough for the full board exam?
This sheet is high-priority revision, not the full syllabus. After you miss a question, open that NCERT example and also attempt a related chapter or mock paper.
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