Notes for basic Computer Science
🖥️ Unit I: Computer Systems and Organisation
📘 Chapter 1: Basics of Computer Organisation
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Input Devices: Keyboard, Mouse, Scanner
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Output Devices: Monitor, Printer, Speakers
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Memory Units: Bit, Byte, KB, MB, GB, TB
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Primary Memory: RAM, ROM
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Secondary Storage: HDD, SSD, USB
📘 Chapter 2: Software Concepts
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System Software: Operating System, Compilers, Device Drivers
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Application Software: MS Word, Excel, Browsers
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Open Source vs Proprietary Software
📘 Chapter 3: Boolean Logic and Number Systems
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Boolean Operators: AND, OR, NOT
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Truth Tables
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Number Systems:
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Binary to Decimal
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Decimal to Binary
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ASCII and Unicode characters
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💻 Unit II: Computational Thinking and Programming – I
📘 Chapter 4: Introduction to Python
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Python Features: Simple, interpreted, free, versatile
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Variables and Data Types:
int,float,str,bool -
Comments:
# for single-line,''' for multi-line''' -
Input/Output:
input(),print()
📘 Chapter 5: Operators and Expressions
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Arithmetic Operators:
+,-,*,/,//,%,** -
Relational Operators:
<,>,<=,>=,==,!= -
Logical Operators:
and,or,not -
Assignment Operators:
=,+=,-= -
Operator Precedence
📘 Chapter 6: Control Flow
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Conditional Statements:
if,if-else,if-elif-else -
Loops:
for,while -
Loop Control:
break,continue,pass
📘 Chapter 7: Strings
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String Creation:
'Hello',"World" -
String Operations: Concatenation (
+), Repetition (*) -
Slicing:
s[1:4] -
Built-in Functions:
len(),lower(),upper(),find()
📘 Chapter 8: Lists and Tuples
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List: Mutable collection
a = [1, 2, 3] -
List Methods:
append(),insert(),remove(),pop() -
Tuple: Immutable
t = (1, 2, 3) -
Accessing Elements: Indexing, slicing
📘 Chapter 9: Dictionaries
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Dictionary Creation:
d = {'name': 'John', 'age': 17} -
Access Elements:
d['name'] -
Methods:
keys(),values(),get(),update()
🌐 Unit III: Society, Law and Ethics – I
📘 Chapter 10: Cyber Safety
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Digital Footprint
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Cyberbullying, Phishing, Identity Theft
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Password Security, Privacy Protection
📘 Chapter 11: Ethics & Legal Issues
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Intellectual Property Rights (IPR)
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Open Source vs Proprietary Software
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Digital Rights & Responsibilities
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Plagiarism and Fair Use
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