CBSE Important Questions for Class 11 Computer Science (2025-26)

1. Define a variable in Python. Give one example.

Answer: A variable in Python is a named location used to store data values. For example, writing x = 10 assigns the value 10 to the variable x.

2. Explain the difference between a list and a tuple in Python.

Answer: Lists in Python are mutable, meaning their elements can be changed after creation. Tuples are immutable, so their elements cannot be changed once assigned. Both can store multiple items but behave differently regarding modification.

3. What is the purpose of the 'elif' statement in Python conditional statements?

Answer: The 'elif' statement allows you to check multiple conditions one by one. If the first 'if' condition is false, 'elif' provides an extra chance to check other conditions before a possible 'else' block.

4. Describe two uses of indentation in Python programming.

Answer: Indentation is used to define the blocks of code, such as those inside functions, loops, or conditionals. It also groups statements so Python can understand which lines belong together, ensuring error-free execution.

5. Differentiate between 'break' and 'continue' statements in loops.

Answer: The 'break' statement immediately exits the entire loop, stopping further iterations. The 'continue' statement skips the current iteration and moves to the next one, allowing the loop to continue running.

6. How do you input and output values in Python? Illustrate with code snippets.

Answer: To take input, use input(); for output, use print(). For example, name = input("Enter name: ") takes input, and print(name) displays output. These functions help interact with users and display results.

7. Justify the need for comments in a Python program.

Answer: Comments help explain code, making it easier to understand for others and for future reference. They do not affect program execution and are useful in debugging and documentation.

8. List and explain any two data types supported by Python with examples.

Answer: The int type is used for integers, like 5 or -2. The str type is for strings, like "Hello". Both are basic data types to store numbers and text in Python programs.

9. State any two advantages of using functions in programming.

Answer: Functions promote code reusability, so common tasks need to be written only once. They also help organize programs into smaller, manageable sections making them easier to debug and maintain.

10. Describe the role of the CBSE syllabus in preparing for Class 11 Computer Science exams.

Answer: The CBSE syllabus outlines all the topics that must be studied for the exam. It guides students on what to focus on, ensures coverage of essential concepts, and helps manage study time efficiently.

How Does Class 11 Computer Science Important Questions Help You with Exams?

Practising chapter-wise Important Questions makes CBSE exam preparation smoother and more focused. These questions strengthen your grasp of key concepts by encouraging you to define, explain, and justify your understanding. Reviewing different question types develops better time management and equips you to write clear, precise answers. The practice also helps you avoid common mistakes and write in a way that scores well as per CBSE expectations.

Advantages of Vedantu Important Questions

• Important Questions are carefully set in line with CBSE exam trends and question patterns.
• Answers are written in simple language with step-by-step reasoning, helping with clarity.
• There is balanced coverage of different mark distributions, such as 1, 2, and 3-mark questions.
• Relevant diagrams, formulas, and logic steps are included where needed for full marks.
• Common student mistakes are highlighted and addressed so you learn to avoid them.
• The questions support systematic, reliable revision right before your CBSE exams.

By practising these Important Questions from the chapter "Important Questions Class 11 Computer Science," you can revise all vital concepts effectively. This approach supports error-free answers, better alignment with CBSE’s expectations, and builds your confidence for the exam day.