📘 Everything Inside 12th HSC Computer Science Notes
Computer Science (Subject Code D-9) is one of the highest scoring bifocal subjects in the Maharashtra State Board 12th Science curriculum. With a total weightage of 200 Marks (100 Theory + 100 Practicals), achieving 190+ marks is completely achievable when you study with structured, point-wise notes.
These PDF notes combine the standard textbook questions, Technical Publishers (TPS) model solutions, and 8 years of repeated board examination questions into a single student-friendly resource.
Verified Circuit & Pin Diagrams
Clean diagrams for the 8085 Microprocessor pin configuration, functional block architecture, and OSI 7 layers.
Solved Assembly Programs
Step-by-step 8085 ALPs including 8-bit & 16-bit addition, subtraction, block transfer, multiplication, and sorting.
Point-Wise Theory Answers
Structured in the exact point format preferred by HSC board examiners to guarantee full marks for 3 and 4 markers.
Past Board Exam Questions
Frequently repeated questions from Maharashtra Board exam papers from 2018 to 2025 flagged with question frequency.
Pro Tip for HSC Board Exams:
In Paper 2, always draw the 8085 Pin Diagram and Architecture Diagram using a pencil and ruler. Examiners award separate marks for labels and directional buses (address vs data bus). Memorize the pin count (40-pin DIP) and power requirements (+5V Vcc at Pin 40, Vss GND at Pin 20).
📊 HSC Class 12 Computer Science Marks Weightage Table
Here is the official chapter-wise distribution of marks for Computer Science Paper 1 and Paper 2:
| Paper | Chapter Name | Marks (Without Option) | Marks (With Option) |
|---|---|---|---|
| CS Paper 1 | Operating Systems | 16 Marks | 22 Marks |
| CS Paper 1 | Data Structures | 13 Marks | 17 Marks |
| CS Paper 1 | C++ Programming | 16 Marks | 23 Marks |
| CS Paper 1 | HTML & Web Designing | 05 Marks | 07 Marks |
| Paper 1 Total | 50 Marks | 69 Marks | |
| CS Paper 2 | Introduction to Microprocessors & 8085 | 14 Marks | 21 Marks |
| CS Paper 2 | 8085 Instruction Set & Programming | 16 Marks | 24 Marks |
| CS Paper 2 | Advanced Microprocessors (8086–Pentium) | 07 Marks | 10 Marks |
| CS Paper 2 | Introduction to 8051 Microcontroller | 05 Marks | 07 Marks |
| CS Paper 2 | Networking Technology | 08 Marks | 11 Marks |
| Paper 2 Total | 50 Marks | 73 Marks | |
🎯 How to Score 190+ in HSC Computer Science
- Master 8085 Assembly Language Programming: Compulsory 5-mark programs appear in Paper 2 (Q5). Practice 10 core ALPs (sum of series, find largest/smallest, block transfer, BCD arithmetic).
-
Never Lose Marks in C++ Syntax: Remember class syntax termination with semicolon (
};), access specifiers (public:,private:), and scope resolution operator (::). - Learn the OSI Model Layers by Mnemonic: Use "Please Do Not Throw Sausage Pizza Away" (Physical, Data Link, Network, Transport, Session, Presentation, Application).
- Complete Both Practical Manuals: Practicals account for 100 out of 200 marks. Submit journals on time and practice code compilation on our Spark Online Compiler.