Bihar Board Class 12 Computer Science Important Questions 2026

Bihar Board Class 12 Computer Science Important Questions 2026 will help you identify the important topics from which you can expect the majority of questions in the final exam. Once you complete your Bihar Board Class 12 Computer Science syllabus 2026 , you can start solving the important questions and can analyze the level of preparation and difficulty level of the questions. The final question paper of CS consists of three sections: Section A, Section B, and Section C. In Section A, there are 42 objective-type questions, of which 35 are to be answered. In case of more than 35 answers, only the first 35 will be evaluated. Each carrying 1 mark. In Section B, there are 15 short-answer-type questions (Each carrying 2 marks), out of which any 10 questions are to be answered. In Section C, there are 6 long-answer-type questions (Each question carries 5 marks). Out of which any 3 questions are to be answered.

As per the Bihar Board Class 12 Computer Science Exam Pattern 2026 , the theory question paper will be conducted for 70 marks and 30 marks are for the practical exam. The questions below are taken from the Bihar Board Class 12 Previous year question paper. You can check out and start solving the Bihar Board Class 12 Computer Science Important Questions 2026 provided here.

Bihar Board Class 12 Computer Science Important Questions 2026 of 1 Mark

The Computer Science Question Paper consists of MCQs in the first section. You have to answer any 35 questions. Each question has 4 options, of which only 1 is correct; you have to mark your selected options. These questions are taken from the latest Bihar Board Class 12 Computer Science model papers as well as previous years' question papers:

1. Which one is a linear Data Structure?
A. Forest    B. Tree   C. Struct   D. Stack

2. ‘double’ is a/an
A. Input function   B. Output function   C. Variable D. Data type

3. ‘And’ is a/an
A. function   B. operator   C. content   D. data type

4. ‘ABC.DAT’ is a/an
A. data file   B. header   C. file linker   D. program block

5. Which one is not a SQL command?
A. Roll back   B. Insert   C. Create   D. Float

6. A two-dimensional Array may have?
A. Only columns   B. Only rows   C. Only one cell   D. Both columns and rows

7. Which one is an output function for the stack?
A. POP   B. PUSH  C. Binary   D. Traversal

8. Abstraction mean?
A. Summarisation   B. Elimination   C.hiding   D. Casting

9. Polymorphism is a feature of ..................
A. Procedural programming   B. SQL   C. Non-procedural Programming   D. Object-oriented Programming

10. The object is
A. Design of class   B. Creator of class  C. instances of object D. instances of class

11. Which of the following is Boolean Operator ?
A. AND   B. For()   C. if()   D. break

12. Base of the hexadecimal number system is?
A. 10   B. 8   C. 2   D. 16

13. A bar on INPUT Boolean Variable represents.
A. OR   B. NOT   C. NOR   D. AND

14. Which one is a DCL Command in SQL?
A. UPDATE   B. ALTER   C. DELETE   D. GRANT

15. Which of the following SQL command used to modify data?
A. CREATE   B. INSERT   C. DELETE   D. GRANT

Bihar Board Class 12 Computer Science Important Questions 2026 of 2 Mark

Section B consists of short-answer-type questions. There will be a total of 18 questions, out of which you are required to answer 10 only. Check out some important two-mark questions below:
1. Define Data member & Member Function.

2. List arithmetical operators in C++ and explain their function.

3. Explain any one Searching Technique.

4. Define DDL and list all DDL Commands.

5. Explain Boolean Expression with example.

6. Explain Boolean Operator.

7. Explain referential Integrity.

8. Describe use of doubly Linked List.

9. Why main () function is essential in C++?

10. What is compiler?

Also Check Bihar Board Class 12 Computer Science Model Papers 2025-26

Bihar Board Class 12 Computer Science Important Questions 2026 of 5 Mark

In Section C, there will be long-answer type questions for 5 marks each. You must answer only three questions out of the 6 questions present in the section. You can refer to some of the most important questions for 5 marks below:

1. Define a stack and show its implementation in C++.

2. Using a C++ program, display the name of the month by accepting the digit of the month.

3. Using a C++ program, generate and display the Factorial of a given number.

4. Using OOP in C++, calculate & display the Area & Perimeter of a right-angle triangle.

5. Write a program in C++ to demonstrate the Public class.

6. Using a C++ program, convert kilograms into centigrams and milligrams.

Themes 11, 13, and 15 are the most important for 5–6 mark and source-based questions. Students should not skip these at any cost. Internal choices will also be available throughout the question paper. You can keep visiting the page to get latest updates about the Bihar Board and more.