Class 12 Computer ScienceChapter Summaries
8 chapters · Quick revision in under 3 minutes per chapter
Exception Handling in Python
Covers types of errors (syntax, runtime, logical), exception handling using try-except-else-finally, and raising exceptions. Handling multiple exceptions and user-defined exceptions are included.
Topics covered
File Handling in Python
Covers opening, reading, writing, and appending files in text and binary modes. CSV file handling is included. Functions: open(), read(), readline(), readlines(), write(), writelines(), seek(), tell().
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Data Handling with Pandas — Series and DataFrame
Covers creation and operations on Series and DataFrame objects. Importing from CSV, selection using loc/iloc, filtering, groupby, and handling missing values are key topics.
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Data Visualisation with Matplotlib
Covers creating line charts, bar charts, histograms, pie charts, and scatter plots using Matplotlib's pyplot interface. Customising plots with labels, title, legend, and colour.
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Computer Networks
Covers types of networks (LAN, MAN, WAN), topologies, the OSI model (7 layers), TCP/IP model (4 layers), network devices, and common protocols. Switching (circuit and packet) is included.
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Database Concepts
Covers database terminology (table, record, field, primary key, foreign key, candidate key), types of databases, DBMS vs RDBMS, and ER model basics. Advantages of DBMS over file system are important.
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Structured Query Language (SQL)
Covers SQL commands: DDL (CREATE, ALTER, DROP), DML (INSERT, UPDATE, DELETE, SELECT). Complex SELECT queries with WHERE, ORDER BY, GROUP BY, HAVING, JOINs, and aggregate functions are key exam topics.
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Society, Law and Ethics in IT
Covers cybercrime types, the IT Act 2000, intellectual property rights, digital footprint, net neutrality, and ethical issues in computing like plagiarism and data privacy.
Topics covered