CS Fundamentals
485 articles in this topic
Arrays and Pointers in C: Complete Guide with Worked Examples for GATE and Interviews
Build one clear mental model for C arrays and pointers. Trace addresses, decode tricky expressions, solve a 2D-array numerical, and practise an in-place reversal.
Updated 9 Aug 20266 min read233 viewsC Programming & Data Structures
Flow Control in the Data Link Layer: Stop-and-Wait, Sliding Window, and Worked Examples
See Stop-and-Wait, sliding windows, Go-Back-N, and Selective Repeat as parts of one system. One link carries every calculation from efficiency to sequence bits.
Updated 9 Aug 20266 min read67 viewsComputer Networks
Run-Time Environment in Compiler Design: Activation Records, Access Links, and Worked Examples
Learn how code, static data, heap, and stack work together at run time. Follow worked examples for recursion depth, stack bytes, and nonlocal access.
Updated 8 Aug 20266 min readCompiler Design
Graph Theory for GATE CS: Concepts and Worked Examples
Build graph theory from two fully specified examples. Work through degree counts, connectivity, spanning trees, bipartiteness, planarity, and Euler and Hamilton checks.
Updated 8 Aug 20266 min readEngineering Mathematics
User-Level vs Kernel-Level Threads for GATE: The Three Multithreading Models, Decided
Decide thread-model statements by asking who schedules the thread and what a blocking call stalls. Six worked judgements make the comparison concrete.
Updated 8 Aug 20265 min readOperating Systems
SQL Tutorial: The Complete Learning Path from First Query to Transactions
Learn SQL in a deliberate order, using one small dataset to practise table creation, filtering, joins, grouping, subqueries and transactions.
Updated 8 Aug 20267 min readDBMS
Turing Machines in Theory of Computation: Design, Worked Trace and Decidability
A six-state Turing machine for L = {0^n1^n}: built from the seven-tuple, traced move by move on 0011 to XXYY and q_accept, then proved a decider rather than only a recogniser.
Updated 8 Aug 20266 min read73 viewsTheory of Computation
Floating Point Representation in COA: IEEE 754 Explained with Worked Examples
Learn the IEEE 754 single-precision layout through two complete conversions, then understand hidden bits, biased exponents, special values, and rounding errors.
Updated 7 Aug 20266 min read73 viewsComputer Organization & Architecture
Digital Systems and Boolean Algebra Basics: Complete Guide with a Worked Example
Connect bits, truth tables, Boolean laws, canonical forms, K-maps, and gates by following one three-input function from specification to a simplified circuit.
Updated 7 Aug 20266 min readDigital Logic
C Programming for GATE: Syllabus Areas, Weightage Pattern and How to Prepare
Understand where C fits in GATE CS, what exam questions test, and how to build reliable tracing skills through pointers, recursion and structured practice.
Updated 6 Aug 20265 min read181 viewsC Programming & Data Structures
Data Link Layer Error Control in Computer Networks: Concepts, CRC, Hamming and Worked Examples
Build error control from first principles, then work through parity, CRC, Hamming code and checksum using bits you can verify by hand.
Updated 6 Aug 20266 min read118 viewsComputer Networks
Lexical Analysis in Compiler Design: Tokens, Patterns, and DFA-Based Scanning with Worked Examples
Learn how a scanner turns source characters into tokens, how token patterns become DFAs, and how longest match, lookahead, and token-counting questions work.
Updated 6 Aug 20266 min read56 viewsCompiler Design