Placement preparation
Aptitude, coding, verbal ability, and reasoning, broken down with worked examples for Indian engineering placements. 553 articles.
int main() vs int main(void) in C and C++: The Difference Explained
In C++, int main() and int main(void) are identical. In C, empty parentheses mean unspecified arguments, void means none. The full breakdown with code examples.
Palindrome Program in Python: Check Numbers and Strings
Five methods to check palindromes in Python: integer reversal, slicing, two-pointer, and recursion. Step-traces, complexity table, and placement context included.
Multiplication Table Program in C, C++, Java, and Python
Write a multiplication table program in C, C++, Java, and Python using for and while loops. Includes algorithm, sample I/O, output formatting, and placement context.
Program to Find the Largest Palindrome in an Array
Step-by-step walkthrough to find the largest palindrome in an array of integers, with Python code, two worked examples, and complexity analysis.
Positive, Negative, or Zero: Number Sign Program in 4 Languages
Check if a number is positive, negative, or zero in C, C++, Java, and Python. Covers the three-branch algorithm, ternary operators, and integer overflow edge cases.
Solid and Hollow Rectangle Star Pattern Programs
Learn to print solid and hollow rectangle star patterns with programs in C, Python, and Java. Covers loop logic, worked output, and common coding mistakes.
Reading Comprehension for Placement Tests: A 2026 Guide
Most campus placement aptitude tests include verbal reading sections. Here is what question types look like, how to read actively, and a daily practice plan.
Python Variable Scope: Local and Global Variables Explained
Learn how local and global variables work in Python, when to use the global keyword, and how scope errors appear in placement coding tests.
Campus Recruitment Day: A Round-by-Round Prep Guide
What happens on campus placement day, how to prepare for each round, and what interviewers actually look for. A practical guide for engineering students.
String Operations in Python: 10 Programs Every Fresher Should Know
Master Python string operations with 10 working code examples: reverse, concatenate, check palindromes, count vowels, and format strings. Built for placement prep.
Ten Technical Interview Aptitude Questions: Set 5
C++ and OOP technical interview questions on pointers, classes, function overloading, abstract classes, and friend functions, with verified interview-ready answers.
Tokens in C: Keywords, Identifiers, Constants, and Operators Explained
Every C program breaks down into six token types. Here is what each one does, the rules that govern each, and the mistakes that trip up students in placement tests.
Top 5 PHP Technical Interview Tips for Freshers
The five PHP technical interview question types that campus drives test most. Covers fundamentals, syntax, GET/POST, debugging, and code output prediction.
Types of Numbers for Aptitude Tests: A 2026 Guide
Natural, whole, rational, prime, and recurring numbers explained with worked examples. Know which number types appear most in campus placement aptitude papers.
Variables and Keywords in C: A Complete Reference
Learn the rules for naming variables in C, all 32 reserved keywords by category, storage classes, scope, and the interview traps that trip up placement candidates.
Why Companies Prefer Full Stack Developers in 2026
Full-stack developers cover both frontend and backend. Here's why Indian tech companies prefer them and how to build a profile that clears the filter.
Taking Career Risks: A Framework for Engineering Students
A decision framework for engineering students weighing off-campus roles, startup offers, and stream switches, with two tests to bound your downside.
Area of Circle in Python: Program Guide with math.pi
Three Python programs to calculate circle area: hardcoded π, math.pi, and numpy.pi. Covers input handling, edge cases, and verified outputs for r=5.
Armstrong Number in Python: 3 Easy Programs
Python programs to check Armstrong numbers: while loop, list comprehension, and a range finder. Verified digit-power derivations for 153, 370, 371, 407, and 9474.
Assignment Operators in Python: Complete Guide with Examples
All 8 Python assignment operators with code examples: = and the 7 augmented forms (+=, -=, *=, /=, %=, **=, //=), walrus :=, and placement test traps.
Python Logical Operators: and, or, not With Examples
Python's and, or, not keywords evaluate conditions, short-circuit expressions, and power the default-value idiom. Truthy/falsy, bitwise differences, and common bugs.
Check if Two Arrays Are Disjoint: C, C++, Java and Python
Four approaches to check if two arrays share no common elements: nested loops O(m×n), sort plus two-pointer, and hash set O(m+n), with C, C++, Java, and Python code.
Commonly Asked C Technical Interview Questions (with Answers)
The seven concept areas C interviewers test most: pointers, memory, strings, storage classes, preprocessor, structs, and undefined behavior, with worked examples.
Quadrilaterals: Types, Properties and Formulas
Six quadrilateral types: square, rectangle, parallelogram, rhombus, trapezium, and kite. Properties, area formulas, and worked examples for campus placement tests.
Count the Number of Ways to Reach the Nth Stair
Staircase problem solved four ways: naive recursion, memoized DP, tabulation, and O(1) space. Python code, verified Fibonacci values, and k-step variation.
Critical Reasoning for Placement Tests: A Beginner's Guide
Six question types, a 3-step approach, and four worked examples for critical reasoning in TCS NQT, AMCAT, CAT, and eLitmus.
Critical Reasoning Question Types for Placement Tests
Master the 6 critical reasoning question types tested in AMCAT, eLitmus, CoCubes, and company-specific placement tests, with worked examples and common traps.
Python Decorators: @syntax, functools.wraps, and Practical Examples
Learn Python decorators step by step: @decorator syntax, functools.wraps, parametrized decorators, class-based decorators, and placement interview examples.
eLitmus pH Test 2026: Exam Pattern, Negative Marking and Percentile
The eLitmus pH test: 60 questions across three sections in two hours. Negative marking rules, percentile calculation, and prep guide for 2026.
Modular Exponentiation in Python: pow(b, e, n) Explained
Compute b^e mod n without overflow using Python's three-argument pow(b, e, n) or the square-and-multiply algorithm. Worked example included.
Find All Ancestors of a Node in a Binary Tree
Find all ancestors of a node in a binary tree with recursive and iterative Python solutions. Includes complexity analysis and placement interview patterns.
Squares Near 10, 100 and 1000: The Base-Distance Trick
Square any number near 10, 100, or 1000 in two steps using (a+b)(a-b). Full derivations for 9², 98², 997², 1002², and placement practice problems.
Min and Max of Arithmetic Expression with + and * (Interval DP)
Find the minimum and maximum of a + and * expression by placing parentheses, using interval DP with a step-by-step worked example.
Shortest Path Between Two Vertices in an Undirected Graph
BFS-based shortest path in undirected graphs: adjacency-list representation, parent-tracking, path reconstruction, and Python + C++ code.
Squaring 2-Digit Numbers Ending in 1, 4, 5, and 6
Four shortcuts for squaring 2-digit numbers ending in 1, 4, 5, or 6, with worked examples, algebraic proof, and a reference table for placement aptitude.
Check if a Character is a Vowel or Consonant in C
Three C programs classify any character as a vowel, consonant, or non-alphabet input using if-else with tolower(), switch-case, and a strchr() lookup table.
Stress Interviews: Common Questions and How to Handle Them
A stress interview tests composure and clear thinking under pressure. Here's what to expect, which questions come up most often, and how to answer them.
How to Improve Communication Skills for Placements
Learn how to improve communication skills with a self-assessment, daily practice system, and guides for interviews, GDs, email, and work.
Print All Distinct Elements in an Array in C
Three C programs to print all distinct elements in an array: nested-loop O(N²), sorting, and count-array, with complexity trade-offs and placement interview tips.
Technical Round Self-Study System: 2026 Engineer's Guide
A practical guide for building a self-study technical-round prep system covering DSA, OS, CN, DBMS, and programming: free and low-cost resources included.
Python Conditionals: if, if-else, elif, and Nested if Explained
Python's if, if-else, elif, and nested if statements control program flow. Syntax, worked examples, and truthiness edge cases for 0, '', [], and None.
4 Methods to Solve Linear Equations (With Worked Examples)
Substitution, elimination, cross-multiplication, and Cramer's rule explained with verified worked examples and placement-test strategy for engineering students.
C Command Line Arguments Set 2: 5 Placement Programs
Five C programs using argc/argv for placement interviews: sum of CLI args, even/odd count, string reverse, safe atoi parsing, and multi-arg processing.
Multithreading in Python: threading Module Complete Guide
Python multithreading with the threading module: create threads, use Lock, RLock, and Semaphore, understand the GIL, and pick the right concurrency tool.
Optimise Your LinkedIn Profile: Advanced 2026 Guide
Already have a LinkedIn profile? This advanced playbook covers SSI score, Boolean keyword placement, Creator mode, and ABM DM templates to drive recruiter inbound.
How to Prep for Product, Service, Analytics, and AI-First Companies
Product, service, analytics, and AI-first companies test very different skills. This guide maps what each bucket tests and how to split your prep time.
Probability Concepts and Problems for Aptitude Tests
How probability thinking works: sample space construction, addition and multiplication rules, conditional probability, and worked problems for placement aptitude tests.
Strong Number Program: Check in C, Python, and Java
Understand strong numbers (Krishnamurthy numbers), verify 145 and 40585 step by step, and write clean check programs in C, Python, and Java.
Get the AI Career Roadmap 2026 (free PDF)
2026 placement-drive AI patterns, project picks recruiters credit, and a prep timeline that fits beside aptitude and coding work.
Download the free PDF