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C++ Lambdas: Captures, Closures and Sort Comparators
1+ day, 2+ hour ago (853+ words) Learn to read C++ lambdas, trace copied and referenced state, write a valid sort comparator, and prevent dangling-reference bugs in stored callbacks. Exam prep & CS education For a first pass through syntax, value-versus-reference capture, and broad STL use, start with…...
Double Pointers in C: Memory Model and Worked Examples
1+ day, 2+ hour ago (317+ words) Exam prep & CS education Here, value stores 24, p stores the address of value, and pp stores the address of p. Use the state before the assignment to 81 and track one pointer level at a time. Meaning or value before mutation This…...
C++ Function Overloading: Resolve 5 Calls and Defaults
4+ day, 4+ hour ago (881+ words) Learn why default arguments affect viability but not ranking, then resolve five score calls using exact matches, promotions and conversions. Includes ambiguity repairs and call-time default evaluation. Exam prep & CS education Function overloading means declaring multiple visible functions with the…...
Pointer Arithmetic in C: Rules and Worked Examples
4+ day, 4+ hour ago (634+ words) Understand how C pointers move across arrays, where arithmetic is valid, and why one-past pointers are useful but never readable. Includes code, traces, and common traps. Exam prep & CS education The useful operations are p + n, p - n, p++, p--, p…...
DFA Basics and Definitions
6+ day, 17+ hour ago (957+ words) Understand what makes a finite automaton deterministic and complete. Build one DFA for strings ending in 01, trace inputs, test acceptance, and repair a missing transition. Exam prep & CS education Use CS Fundamentals for Exams & Placements as the broader subject hub…...
C++ const vs constexpr vs consteval: One Worked Program
1+ week, 1+ day ago (665+ words) See exactly what each C++ keyword guarantees. One C++20 program separates immutability, optional constant evaluation and mandatory constant evaluation. Exam prep & CS education Start with an ordinary function and a const object: Do not turn that into the rule "const…...
JavaScript Strings Tutorial: Methods & Template Literals
1+ week, 5+ day ago (633+ words) Exam prep & CS education You can declare variables, but JavaScript strings may still surprise you. Quote styles look interchangeable, indexes invite off-by-one mistakes, methods seem to ignore your changes, and adding a number may produce text. Reliable string code depends…...
Functions in Python: Traced Calls, Return Values and Scope
1+ week, 5+ day ago (790+ words) Build, call and debug Python functions through traced examples. Learn how arguments, local scope and return values work, then test yourself with short exercises. Exam prep & CS education You can run short Python statements, but copying a calculation for each…...
Python String MCQs: 12 Solved Questions with Answers
1+ week, 5+ day ago (557+ words) Solve 12 published Python string questions step by step. Trace indices, slices, return types and method contracts before checking each answer. Exam prep & CS education Keep this rule sheet beside you while solving: Excludes stop; an omitted bound follows the direction…...
JavaScript Prototypes and Inheritance: Runnable Examples
1+ week, 6+ day ago (571+ words) Understand how JavaScript finds inherited properties, shares methods, and implements constructor and class inheritance. Trace the chains, fix common mistakes, and test yourself. Exam prep & CS education JavaScript makes three ideas look more mysterious than they are: an object's hidden…...