Placement prep + AI for engineers
Evidence-led articles on aptitude, coding, company-specific test patterns, and AI roadmaps for Indian engineering students. 1019 articles published so far. India-context throughout.
NTT DATA recruitment: hiring process, eligibility, prep guide (2026)
Complete guide to NTT DATA's 2026 fresher recruitment in India: eligibility, online assessment pattern, interview rounds, and section-wise preparation tips.
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.
Best IT Companies to Work for in India: Fresher Guide 2026
Compare India's top IT employers for 2026 freshers: TCS, Infosys, Wipro, HCL, Cognizant, and Accenture, evaluated on CTC bands, selection process, and growth tracks.
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.
BYJU'S Recruitment 2026: Status, History, and Alternatives
BYJU'S entered insolvency proceedings in 2024 and is not hiring at scale in 2026. Here is what placement-bound students should know and where to look instead.
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.
CoCubes Test Pattern 2026: Full Syllabus by Section
CoCubes pre-assessment, run by Aon: section-by-section syllabus, question counts, timing, scoring cutoffs, and prep approach for 2026 campus drives.
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.
Directi Placement Papers: Test Pattern, Syllabus, and Sample Questions
Directi's two-round online test filters on 20 technical MCQs and 2–3 CodeChef-hosted coding problems. Full syllabus, company context, and worked sample questions.
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.
How to Get Placed at Infosys in 2026: Fresher Roadmap
Three hiring tracks, real CTC bands, and an eight-week prep timeline for engineering freshers targeting Infosys in 2026.
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.
LinkedIn Profile Setup for Engineering Freshers
Step-by-step guide to building a LinkedIn profile that gets noticed: photo, headline, About summary, skills, first connections, and your first 5 posts.
Communication Skills for Campus Placements: GD, HR, and Beyond
GD rounds, HR interviews, and written assessments each test communication differently. Here's what engineering students need to practise and how.
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.
Idioms and Phrases: Meaning, Usage and 25 Examples
The 25 idioms most-tested in TCS NQT, Infosys, AMCAT, and eLitmus verbal sections, with meanings, MCQ formats, and example sentences for each.
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.
LTIMindtree Recruitment 2026: Full Fresher Guide
LTIMindtree hires freshers through a 50-question online test, paragraph writing, and two interview rounds. Full eligibility, syllabus, and prep guide for 2026.
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.
Check if a Graph is a Tree: Three Algorithms in Python
Three algorithms to check if an undirected graph is a tree: DFS with parent tracking, Union-Find, and edge-count plus BFS. Python code for each, O(V+E) analysis.
Count Common Subsequences of Two Strings
Count common subsequences of two strings using DP: derive the recurrence, trace a 4x4 table, implement in Python, and cut space to O(min(m,n)) with a rolling array.
Minimum Number of Jumps to Reach End of an Array
Greedy O(n) and DP O(n²) solutions for the minimum jumps problem, with worked examples verified from scratch and C, Python, Java programs.
Matrix Row and Column Sums: Find the Greatest
Find the sum of each row and column of a matrix, then identify which row and column has the greatest sum. Algorithm, C, Java, Python code, complexity.
Frequency of Each Array Element: 3 Approaches
Count how often each element appears in an array using nested loops, sorted sweep, and hash map. Python and C++ code with complexity analysis and edge cases.
Find Greatest of Two or Three Numbers: C, Python, and Java
If-else, ternary, and built-in approaches to finding the max of 2 or 3 numbers in C, Python, and Java, with N-numbers loop and edge cases.
Kth Maximum Element in a Binary Search Tree
Reverse inorder traversal finds the k-th maximum in a BST in O(H+k) time. Worked example with a 7-node tree, C++, Java, and Python code, plus edge cases.
Median of Two Sorted Arrays: Brute Force and Binary Search
Find the median of two sorted arrays using the merge approach and the O(log min(m,n)) binary search partition. Verified Python code included.
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.
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