Key topics for Python programming, Data Structures, SQL, and Networks — focused on CBSE board exam.
13
Chapters
70
Marks total
7
Exam chapters
High-Weightage Chapters
🎯 These chapters carry the most marks — prepare these first:
Ch 1: Exception Handling in Python — 8 marks
Ch 2: File Handling in Python — 16 marks
Ch 3: Stack — 16 marks
Ch 9: Structured Query Language (SQL) — 15 marks
📝 Ch 1: Exception Handling in Python
8 marks
A program can have two types of errors — syntax errors and exceptions (runtime errors)
Syntax errors are detected by the interpreter before the program runs
Exceptions occur during the execution of a program
Python provides a robust exception handling mechanism using try-except blocks
📝 Ch 2: File Handling in Python
16 marks
Data stored in variables (RAM) is temporary and lost when the program terminates
Files provide a way to store data permanently on secondary storage
Python treats files as a sequence of lines (text files) or bytes (binary files)
A file object (file handle) is used to interact with the file on disk
📝 Ch 3: Stack
16 marks
Data structures help in organizing data for efficient access and modification
Linear data structures have elements in a sequential arrangement
Stacks and queues are special types of linear data structures with restricted operations
The choice of data structure depends on the nature of operations to be performed
📝 Ch 8: Database Concepts
5 marks
A database stores related data in an organized manner
DBMS is the software used to manage databases
DBMS provides data independence, security, integrity, and concurrent access
Examples of DBMS: MySQL (open-source), Oracle, PostgreSQL, MS SQL Server
📝 Ch 9: Structured Query Language (SQL)
15 marks
SQL is the standard language for relational database management
SQL is declarative — specify what data you need, not the steps to get it
SQL keywords are case-insensitive; table/column names may be case-sensitive depending on the system
SQL statements end with a semicolon (;)
📝 Ch 10: Computer Networks
5 marks
A computer network allows communication and resource sharing between connected devices
Advantages of networking include file sharing, hardware sharing (printers, scanners), internet sharing, communication (email, video conferencing), and centralized data management
Networks can follow client-server or peer-to-peer architecture
A server provides services to clients; in peer-to-peer, each node can act as both
📝 Ch 11: Data Communication
5 marks
Data communication requires five components: sender, receiver, message, transmission medium, and protocol
The sender generates the data; the receiver accepts the data
The message can be text, image, audio, video, or multimedia
The medium can be wired (guided) or wireless (unguided)