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Computer Science (New Syllabus) CLASS-XI (Code No. 083) 2019-20
Unit 1: Computer Systems and Organisation (Marks - 10)
♣ Basic computer organization: description of a computer system and mobile system, CPU, memory, hard disk, I/O, battery.
♣ Types of software: application, System, utility.
♣ Memory Units: bit, byte, MB, GB, TB, and PB.
♣ Boolean logic: OR, AND, NAND, NOR, XOR, NOT, truth tables, De Morgan’s laws
♣ Information representation: numbers in base 2, 8, 16, binary addition
♣ Strings: ASCII, UTF8, UTF32, ISCII (Indian script code), Unicode
♣ Basic concepts of Flowchart
♣ Concept of Compiler & Interpreter
♣ Running a program: Notion of an operating system, how an operating system runs a program, idea of loading, operating system as a resource manager.
♣ Concept of cloud computing, cloud (public/private), introduction to parallel computing.
Unit 2: Computational Thinking and Programming (Marks - 35)
♣ Basic of Computational Thinking: Decomposition, Pattern Recognition/ Data representation, Generalization/ Data Abstraction and algorithm.
♣ Familiarisation with the basics of Python programming: a simple “hello world" program, process of writing a program (Interactive & Script mode), running it, and print statements; simple data-types: integer, float, string
♣ Features of Python, Python Character Set, Token & Identifiers, Keywords, Literals, Delimiters, operators.
♣ Comments: (Single line & Multiline/ Continuation statements), Clarity & Simplification of expression.
♣ Introduce the notion of a variable, and methods to manipulate it (concept of L- value and R-value even if not taught explicitly).
♣ Knowledge of data types and operators: accepting input from the console, assignment statement, expressions, operators and their precedence.
♣ Operators & types: Binary operators-Arithmetic, Relational operators, Logical Operators, Augmented assignment operators.
♣ Conditional statements: if, if-else, if-elf-else; simple programs: e.g.: absolute value, sort 3 numbers, and divisibility.
♣ Notion of iterative computation and control flow: for (range(),len()), while, flowcharts, suggested programs: interest calculation and factorials, etc.
♣ Idea of debugging: errors and exceptions; debugging: pdb, break points.
♣ Lists, tuples and dictionary: finding the maximum, minimum, mean; linear search on list/tuple of numbers, and counting the frequency of elements in a list using a dictionary. Introduce the notion of accessing elements in a collection using numbers and names.
♣ Sorting algorithm: bubble and insertion sort; count the number of operations while sorting.
♣ Strings: Traversing, compare, concat, substring.
♣ Introduction to Python modules: Importing math (sqrt, cell, floor, pow, fabs, sin, cos, tan, random (random, randint, randrange), statistics (mean, median, mode) modules.
Unit 3: Data Management (Marks - 15)
♣ Relational databases: Concept of a database, relations, attributes and tuples, keys- candidate key, primary key, alternate key, foreign key;Degree and cardinality of a table.
♣ Use SQL – DDL/ DML commands to CREATE TABLE, INSERT INTO, UPDATE TABLE , DELETE FROM, ALTER TABLE,MODIFY TABLE, DROP
♣ TABLE, keys, and foreign keys; to view content of a table: SELECT-FROM- WHERE-ORDER BY alongwith BETWEEN, IN, LIKE, (Queries only on single table)
♣ Aggregate functions – MIN,MAX,AVG,COUNT,SUM
♣ Basics of NoSQL databases.
Unit 4: Society, Law and Ethics - Cyber safety (10)
♣ Cyber safety: safely browsing the web, identity protection, confidentiality, social networks, cyber trollsand bullying
♣ Appropriate usage of social networks: spread of rumours, and common social networking sites (Twitter, LinkedIn, and Facebook) and specific usage rules.
♣ Safely accessing web sites: adware, malware, viruses, Trojans
♣ Safely communicating data: secure connections, eavesdropping, phishing and identity verification.
