Computer Science
Chapter 1: Exception Handling in PythonComputational Thinking and Programming - 2
- 1.1 Introduction
- 1.2 Syntax Errors
- 1.3 Exceptions
- 1.4 Built-in Exceptions
- 1.5 Raising Exceptions
- 1.6 Handling Exceptions
- 1.7 Finally Clause
- Summary
- Exercise
Official NCERT PDF (English)
Chapter 2: File Handling in PythonComputational Thinking and Programming - 2
- 2.1 Introduction to Files
- 2.3 Opening and Closing a Text File
- 2.4 Writing to a Text File
- 2.5 Reading from a Text File
- 2.6 Setting Offsets in a File
- 2.7 CREATING AND TRAVERSING A TEXT FILE
- 2.8 The Pickle Module
- Summary
- Exercise
Official NCERT PDF (English)
Chapter 3: StackComputational Thinking and Programming - 2
- 3.1 Introduction
- 3.2 Stack
- 3.3 Operations on Stack
- 3.4 Implementation of Stack in Python
- 3.5 Notations for Arithmetic Expressions
- 3.6 Conversion from Infix to Postfix Notation
- 3.7 Evaluation of Postfix Expression
- Summary
- Exercise
Official NCERT PDF (English)
Chapter 8: Database ConceptsDatabase Management
- 8.1 Introduction
- 8.2 File System
- 8.3 Database Management System
- 8.4 Relational Data Model
- 8.5 Keys in a Relational Database
- Summary
- Exercise
Official NCERT PDF (English)
Chapter 9: Structured Query Language (SQL)Database Management
- 9.1 Introduction
- 9.2 Structured Query Language (SQL)
- 9.3 Data Types and Constraints in MySQL
- 9.4 SQL for Data Definition
- 9.5 SQL for Data Manipulation
- 9.6 SQL for Data Query
- 9.7 Data Updation and Deletion
- 9.8 Functions in SQL
- 9.9 GROUP BY Clause in SQL
- 9.10 Operations on Relations
- 9.11 Using Two Relations in a Query
- Summary
- Exercise
Official NCERT PDF (English)
Chapter 10: Computer NetworksComputer Networks
- 10.1 Introduction to Computer Networks
- 10.2 Evolution of Networking
- 10.3 Types of Networks
- 10.4 Network Devices
- 10.5 Networking Topologies
- 10.6 Identifying Nodes in a Networked Communication
- 10.8 Domain Name System
- Summary
- Exercise
Official NCERT PDF (English)
Chapter 11: Data CommunicationComputer Networks
- 11.1 Concept of Communication
- 11.2 Components of Data Communication
- 11.3 Measuring Capacity of Communication Media
- 11.4 Types of Data Communication
- 11.5 Switching Techniques
- 11.6 Transmission Media
- 11.7 Mobile Telecommunication Technologies
- 11.8 Protocol
- Summary
- Exercise
Official NCERT PDF (English)
Free sample questions
Three sample questions with answers. Full explanations — and the rest of the question bank — are free to read after you sign up.
Q1. Assertion (A): Every syntax error is an exception but every exception is not a syntax error. Reason (R): All exceptions other than SyntaxError are generated only when the program is syntactically correct.
- Both A and R are true and R is the correct explanation of A.
- Both A and R are true but R is not the correct explanation of A.
- A is true but R is false.
- A is false but R is true.
Show answer
Correct answer: A. Both A and R are true and R is the correct explanation of A.
🔒 The full explanation is free to read after you sign up →
Q2. Assertion (A): A single optical fibre cable is enough to provide full-duplex communication. Reason (R): Optical fibre cables are unidirectional.
- Both A and R are true and R is the correct explanation of A.
- Both A and R are true but R is not the correct explanation of A.
- A is true but R is false.
- A is false but R is true.
Show answer
Correct answer: D. A is false but R is true.
🔒 The full explanation is free to read after you sign up →
Q3. The EMPLOYEE table has 10 rows. The Bonus column is NULL for exactly three of them. What does SELECT COUNT(Bonus) FROM EMPLOYEE; return?
- 10
- 3
- 7
- 0
Show answer
Correct answer: C. 7
🔒 The full explanation is free to read after you sign up →
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Chapter lists follow the NCERT textbooks as available to us; textbooks are revised from time to time, so confirm on ncert.nic.in.
