CBSE Class 11 Computer Science Syllabus 2025-26: PDF Download

Unit-Wise CBSE 11th Class Computer Science Syllabus 2025-26

Students who will appear for the CBSE 11th exam can check out the following unit-wise syllabus for the computer science subject. The unit-wise syllabus will help students to prepare for the board examination. Candidates can check out the detailed CBSE 11th syllabus for the computer science subject below.

Unit 1: Computer Systems and Organisation

• Basic computer organisation: Introduction to Computer System, hardware, software, input device, output device, CPU, memory (primary, cache and secondary), units of memory (bit, byte, KB, MB, GB, TB, PB)

• Types of software: System software (Operating systems, system utilities, device drivers), programming tools and language translators (assembler, compiler, and interpreter), application software

• Operating System(OS): Functions of the operating system, OS user interface

• Boolean logic: NOT, AND, OR, NAND, NOR, XOR, truth tables and De Morgan’s laws, Logic circuits

• Number System: Binary, Octal, Decimal and Hexadecimal number systems; conversion between number systems

• Encoding Schemes: ASCII, ISCII, and Unicode (UTF8, UTF32)

Unit 2: Computational Thinking and Programming - I

• Introduction to Problem-solving: Steps for Problem-solving (Analyzing the problem, developing an algorithm, coding, testing, and debugging), representation of algorithms using flowchart and pseudocode, decomposition

• Familiarisation with the basics of Python programming: Introduction to Python, Features of Python, executing a simple “hello world" program, execution modes: interactive mode and script mode, Python character set, Python tokens( keyword, identifier, literal, operator, punctuator), variables, concept of l-value and r-value, use of comments

• Knowledge of data types: Number(integer, floating point, complex), boolean, sequence(string, list, tuple), None, Mapping(dictionary), mutable and immutable data types.

• Operators: arithmetic operators, relational operators, logical operators, assignment operators, augmented assignment operators, identity operators (is, is not), membership operators (in, not in)

• Expressions, statements, type conversion, and input/output: precedence of operators, expression, evaluation of an expression, type conversion (explicit and implicit conversion), accepting data as input from the console and displaying output.

• Errors- syntax errors, logical errors, and run-time errors

• Flow of Control: introduction, use of indentation, sequential flow, conditional and iterative flow

• Conditional statements: if, if-else, if-elif-else, flowcharts, simple programs: e.g., absolute value, sort 3 numbers and divisibility of a number.

• Iterative Statement: for loop, range(), while loop, flowcharts, break and continue statements, nested loops, suggested programs: generating pattern, summation of series, finding the factorial of a positive number, etc.

• Strings: Introduction, string operations (concatenation, repetition, membership and slicing), traversing a string using loops, built-in functions/methods–len(), capitalize(), title(), lower(), upper(), count(), find(), index(), endswith(), startswith(), isalnum(), isalpha(), isdigit(), islower(), isupper(), isspace(),lstrip(), rstrip(), strip(), replace(), join(), partition(), split()

• Lists: Introduction, indexing, list operations (concatenation, repetition, membership and slicing), traversing a list using loops, built-in functions/methods–len(), list(), append(), extend(), insert(), count(), index(), remove(), pop(), reverse(), sort(), sorted(), min(), max(), sum(); nested lists, suggested programs: finding the maximum, minimum, mean of numeric values stored in a list; linear search on list of numbers and counting the frequency of elements in a list.

• Tuples: Introduction, indexing, tuple operations (concatenation, repetition, membership and slicing); built-in functions/methods – len(), tuple(), count(), index(), sorted(), min(), max(), sum(); tuple assignment, nested tuple; suggested programs: finding the minimum, maximum, mean of values stored in a tuple; linear search on a tuple of numbers, counting the frequency of elements in a tuple.

• Dictionary: Introduction, accessing items in a dictionary using keys, mutability of a dictionary (adding a new term, modifying an existing item), traversing a dictionary, built-in functions/methods – len(), dict(), keys(), values(), items(), get(), update(), del, clear(), fromkeys(), copy(), pop(), popitem(), setdefault(), max(), min(), sorted(); Suggested programs: count the number of times a character appears in a given string using a dictionary, create a dictionary with names of employees, their salary and access them.

• Introduction to Python modules: Importing module using ‘import <module>’ and using from statement, importing math module (pi, e, sqrt(), ceil(), floor(), pow(), fabs(), sin(), cos(), tan()); random module (random(), randint(), randrange()), statistics module (mean(), median(), mode()).

Unit 3: Society, Law and Ethics

• Digital Footprints

• Digital Society and Netizen: net etiquettes, communication etiquettes, social media etiquettes

• Data Protection: Intellectual property rights (copyright, patent, trademark), violation of IPR (plagiarism, copyright infringement, trademark infringement), open source software and licensing (Creative Commons, GPL and Apache)

• Cyber Crime: definition, hacking, eavesdropping, phishing and fraudulent emails, ransomware, cyber trolls, cyber bullying

• Cyber safety: safely browsing the web, identity protection, and confidentiality

• Malware: viruses, trojans, adware

• E-waste management: proper disposal of used electronic gadgets.

• Information Technology Act (IT Act)

• Technology and society: Gender and disability issues while teaching and using computers

CBSE Class 11 Computer Science 2025-26 Syllabus: Marks Distribution

How Can I Download the CBSE Class 11 Computer Science Syllabus 2025-26 Online?

Students can check out the steps below to learn more about how to download the CBSE 11th syllabus for the computer science syllabus in online mode.

• Step 1: Visit the official website at cbse.gov.in.
  Step 2: Click on the “Academic Website” on the homepage.

• Step 3: Click on the “Curriculum” from the list of options mentioned in the menu bar.

• Step 4: Select the “Curriculum 2025-26” from the dropdown menu.

• Step 5: Click on the “Senior Secondary Curriculum” link for the Class 11 syllabus.

• Step 6: Select the “Academic Subjects” link to download the computer science syllabus PDF.

• Step 7: Download the CBSE 11th Computer Science syllabus for 2025-26 for future reference.

CBSE 11th Class Practical Computer Science Syllabus 2025-26

Note: With the help of the Computer Science subject, students will be able to develop their basic computational skills and a basic understanding of computer systems and operating systems. Students can understand the value of technology in the present world.