Computer Science
Master Python, file handling, data structures and SQL for the CBSE Class 12 CS (083) board exam.
A complete preparation course for CBSE Class 12 Computer Science (Subject Code 083) aligned to the 2025-26 syllabus from cbseacademic.nic.in. Covers Python programming with functions, exception and file handling, stacks, database management with SQL, Python-SQL connectivity and computer networks, with full coverage of both the 70-mark theory paper and the 30-mark practical, project and viva.
What you'll learn
- ✓Write modular Python programs using user-defined functions, scope rules and exception handling
- ✓Read, write, search and update text, binary (pickle) and CSV files
- ✓Implement and operate a stack data structure using Python lists (push and pop)
- ✓Design relational database tables and apply primary, foreign and candidate keys
- ✓Write SQL queries using DDL/DML commands, WHERE, GROUP BY, HAVING, ORDER BY and joins
- ✓Use SQL aggregate, math, text and date functions to analyse data
- ✓Connect Python applications to a SQL database and run queries via cursors
- ✓Understand computer networking fundamentals, devices, topologies and protocols
Full syllabus
Mapped to the official CBSE curriculum.
01Unit I: Computational Thinking and Programming - 2 (40 marks)+
- Revision of Python basics from Class XI
- Functions: scope, parameter passing, passing mutable/immutable objects, returning values, default and keyword arguments
- Built-in functions, functions defined in modules (math, random, statistics), user-defined functions
- Exception handling using try, except, finally and raise
- Introduction to files: types of files (text, binary, CSV); relative and absolute paths
- Text files: opening modes (r, r+, w, w+, a, a+), reading/writing (read, readline, readlines, write, writelines), close, seek, tell
- Binary files: pickle module - dump() and load(); reading, writing, searching, appending and updating records
- CSV files: csv module - reading and writing using reader() and writer()
- Data structures - Stack: implementation using lists, push and pop operations
02Unit II: Computer Networks (10 marks)+
- Evolution of networking: ARPANET, NSFNET, Internet
- Data communication terminologies: concept of communication, sender, receiver, message, channel; bandwidth and data transfer rate (bps)
- IP address; switching techniques (circuit, packet)
- Transmission media: wired (twisted pair, co-axial, optical fibre) and wireless (microwave, radio, satellite)
- Network devices: modem, hub, switch, repeater, router, gateway, NIC
- Network topologies: Bus, Star, Tree
- Types of networks: PAN, LAN, MAN, WAN
- Network protocols: HTTP, FTP, PPP, SMTP, TCP/IP, POP3, HTTPS, TELNET, VoIP
- Introduction to web services: WWW, HTML, XML, domain names, URL, website, web browser, web servers, web hosting
03Unit III: Database Management (20 marks)+
- Database concepts: relational data model, relation, attribute, tuple, domain, degree, cardinality
- Keys: candidate key, primary key, alternate key, foreign key
- Structured Query Language (SQL): data types (char, varchar, int, float, date)
- DDL commands: CREATE TABLE, ALTER TABLE, DROP TABLE
- DML commands: INSERT, UPDATE, DELETE, SELECT
- SQL clauses and functions: WHERE, IN, BETWEEN, DISTINCT, ORDER BY, GROUP BY, HAVING, NULL handling
- Aggregate functions: MIN, MAX, AVG, SUM, COUNT; math, text and date functions
- Joins: equi-join and natural join (Cartesian product of two tables)
- Interface of Python with an SQL database: connect, cursor, execute, commit, fetchone(), fetchall(), rowcount
Tools you'll use
Exam pattern
Total 100 marks = Theory 70 + Practical 30. Theory paper (3 hours): Unit I Computational Thinking and Programming-2 = 40 marks, Unit II Computer Networks = 10 marks, Unit III Database Management = 20 marks. Practical (30 marks): Lab Test 12 (Python program 8 + SQL queries 4), Report/Practical File 7, Project 8, Viva Voce 3.
Practical / project
Practical work (30 marks) requires a practical file with a minimum of 15 Python programs (file handling, stacks, CSV, random numbers, etc.) and SQL query sets, plus a Python-SQL based project. Assessed via a lab test (live Python program and SQL queries on one/two tables), the report file, the project, and a viva voce.
Who it's for
CBSE Class 12 students taking Computer Science (083) who want strong, syllabus-aligned preparation for both the board theory paper and the practical, project and viva.
What's included
- ✓Live interactive online classes with Kajal Ma'am (group batch or one-to-one), teaching since 2006
- ✓Chapter-wise Kwick Notes covering Python, file handling, stacks, SQL and computer networks
- ✓Solved textbook and NCERT-aligned solutions for every unit
- ✓Topic-wise assignments and worksheets with regular practice questions
- ✓Dedicated doubt-solving sessions until every concept is clear
- ✓Previous-year and sample board paper practice for the 70-mark theory exam
- ✓Practical file guidance (15+ Python programs and SQL query sets) plus Python-MySQL project mentoring
- ✓Lab-test and viva voce preparation for the 30-mark practical exam
Why study Computer Science?
CBSE Class 12 Computer Science (Subject Code 083) is one of the most scoring subjects in the Science and Commerce streams, with Python programming alone carrying 40 of the 70 theory marks and a further 30 marks available from the practical, project and viva. A strong grasp of Python, SQL database management and computer networks here directly translates into high board percentages and a genuine head start for B.Tech (CSE/IT), BCA and other computing degrees. Because the paper rewards hands-on coding and clear logic rather than rote memorisation, students who understand the concepts well can comfortably target 90+ and even a perfect score.
Class 12 Computer Science builds the exact foundation universities expect for B.Tech in Computer Science or IT, BCA, B.Sc Computer Science and data-focused programmes. The Python programming, relational databases and SQL covered here map directly to entry-level skills in software development, data analysis, web and database work, and are a stepping stone toward fields like AI and machine learning. It also gives students an early, practical feel for how real software and data systems are built.
Learn directly from Kajal Ma'am
An MCA who has taught computer subjects since 2006, Kajal Mehta personally mentors every batch — turning dense theory into clear, exam-ready understanding.
Course FAQs
Are the CBSE Class 12 Computer Science classes live or pre-recorded?+
Who can join this Class 12 Computer Science online course?+
What is the fee, and how do group and one-to-one classes differ?+
Is the course aligned with the latest CBSE 2025-26 syllabus?+
Do you help with the practical file, project and viva?+
Can I attend a demo class before paying?+
What kind of results does Kwickprep have?+
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