CS Fundamentals
487 articles in this topic
Regular expressions and the pumping lemma, with the exam angle
Regular expressions and the pumping lemma explained: the operators, closure properties, and a worked proof that a^n b^n is not regular, with the exam angle.
11 Jul 20266 min readEngineering Mathematics
Finite automata: DFA vs NFA, with the exam angle
Finite automata explained: the DFA and NFA 5-tuple, DFA vs NFA, a worked subset construction converting an NFA to a DFA, equivalence, and the exam angle.
Updated 14 Jul 20265 min read64 viewsTheory of Computation
TCP vs UDP: the transport layer explained, with the exam angle
TCP vs UDP explained: the transport layer's job, connection-oriented vs connectionless, reliability, congestion control, headers, and when to use each.
10 Jul 20265 min read131 viewsComputer Networks
IP addressing and subnetting: a worked guide with the exam angle
IP addressing and subnetting explained: IPv4 structure, classful vs CIDR, subnet masks, a fully worked subnetting example with ranges and broadcast addresses.
Updated 14 Jul 20265 min read94 viewsComputer Networks
DBMS Normalization Explained Simply (With the Questions That Test It)
Normalization confuses almost everyone the first time. Here is a plain-English walk from functional dependencies to BCNF, and the exact question patterns that test it.
Updated 26 Jul 20266 min read177 viewsDBMS
Operating Systems for GATE: How to Study Deadlocks, Scheduling and Memory
Operating Systems is one of the densest, most-tested GATE CS subjects. Here is how to study its three biggest areas (scheduling, deadlocks and memory) so the marks actually come.
Updated 26 Jul 202610 min read164 viewsOperating Systems
The TCS NQT Exam Structure, Explained Section by Section
The TCS National Qualifier Test is one of the widest doors into an IT career in India. Here is a clear, section-by-section breakdown of what it tests and how to prepare.
5 Jul 20264 min read536 viewsC Programming & Data Structures