I built a free, interactive SQL practice tool for data engineering interviews
Most data engineering interview prep resources I found online were static — a list of questions with answers underneath. You read the answer, nod, a…
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Why Strong Engineers Fail Coding Interviews: A Scorecard Autopsy
The strongest candidate I ever voted no on solved the problem in eleven minutes. Clean. Optimal. Caught the edge case I normally have to hint at twi…
Java OOP Interview Notes — Everything You Need to Know
Java OOP Interview Notes ☕🚀 This is more than a normal notes it is heavy in depth and i am pretty sure you don't need to watch any tutorial, this no…
Node.js interview deep dive: what they are really testing
Almost every senior Node question is the same question wearing a different hat: do you understand that there is one thread doing your work, and do y…
Your degree got you the interview. This is why it isn't getting you the job.
I'm in a lot of Facebook groups. Dev groups, IT groups, job groups, here in the Philippines. And there's one post I see more than any other. It goes…
The Bug That Passed Every Test — And Still Took Production Down
A few years ago, I was working on a backend service that looked completely healthy. Tests were green. CPU usage was normal. Memory looked fine. No o…
Azure Integration Services Interview Prep Part 3: Managed Identity, Key Vault, VNet , Private Endpoints, NSGs, RBAC and Token Validation
Part 1 covered the messaging services - Service Bus, Storage Queues, Event Hub, Event Grid. Part 2 covered the orchestration layer that processes wh…
A SQL interview is a translation test, not a syntax test
Canonical: this is a cross-post. The original lives at https://four-leaf.ai/blog/sql-interview-guide Key takeaways A SQL interview is a translation…
HTML, CSS and Bootstrap Interview Questions
HTML Interview Questions 1. What is HTML? HTML stands for HyperText Markup Language. It is used to create the structure of a webpage. We use HTML to…
How I Cracked LeetCode Like a Jedi: The Ultimate Beginner's Study Plan
The Quest Begins (The "Why") I still remember staring at my screen, heart pounding, as the timer ticked down on a mock interview. The problem was Tw…
🚀 30 React.js Interview Questions You Should Know Before Your Next Frontend Interview ⚛️
30 React.js Interview Questions You Should Know Before Your Next Frontend Interview ⚛️ Whether you're preparing for a frontend interview or simply w…
May the STAR Be With You: Mastering Behavioural Interviews
The Quest Begins (The "Why") I still remember my first behavioural interview like it was yesterday. I walked in, shook hands, and the interviewer hi…
UPI at Scale: Handling Millions of Payments
Imagine this: It's salary day. It's 2 PM. Millions of people across India suddenly open their UPI apps and start paying rent, sending money to famil…
The Interview Question That Quietly Sinks Excellent European Engineers
You didn't fail the coding round. You failed a sentence. Here's a scenario I hear constantly from senior engineers in Prague, Berlin, Warsaw, and Li…
Day 4 as a Full Stack Intern: Flexbox
Flexbox is a one-dimensional layout system used to arrange elements in a row OR a column. Once you understand main axis + cross axis, almost everyth…
Every interview question has a second question behind it. Here are 7
Interviewers rarely ask for the thing they want to know. They ask for something adjacent, cheap to answer, and easy to score, and then they listen t…
My Exact Cognizant GenC Interview Experience & Hiring Process (2025–2026)
Well, if you are preparing for Cognizant On-Campus drive, chances are that you already know that it’s a marathon. I went through the entire 2025-202…
How Will You Configure Multiple Backend Instances in Apigee X So That If One Goes Down, Traffic Is Routed to Another?
“You have multiple backend instances. If one instance goes down, how will Apigee X automatically route traffic to another healthy instance?” This so…
Mastering the Producer-Consumer Pattern in Java LLD: The Restaurant Kitchen
Mastering the Producer-Consumer Pattern in Java LLD: The Restaurant Kitchen The Producer-Consumer pattern is a staple in Java Machine Coding intervi…
Interviewing off leetcode you already memorized isn't cheating, it's the job
Someone was accused of cheating because they were able to solve a difficult problem very quickly. Not for playing with AI. Not for copying from a sc…
30 technical interview questions, explained the way you'd actually say them
30 Technical Interview Questions You Should Be Able to Explain Out Loud (JS / React / Node) Most interview prep content gives you a definition. Real…
Why System Design Interview Prep Is Your Only Moat Against AI
I build an AI product for a living, and I'll tell you what the models are good at: they write my CRUD endpoints, my Terraform, my test scaffolding,…
Twelve AWS networking questions, and what the interviewer is actually listening for
I have asked some version of "walk me through why this EC2 instance can't reach the internet" in about forty interviews. Maybe six people answered i…
"Kubernetes Interviews Are Broken When Trivia Matters More Than Real Skill"
Kubernetes Interviews Are Broken When Trivia Matters More Than Real Skill Kubernetes interviews often fail when they test whether a candidate can re…
Intuit OA 2026 Guide: Code, SQL & Bash Questions Explained
The Intuit Online Assessment (OA) has started rolling out again, and the format remains very similar to previous years. Most candidates receive thre…
How I Crashed My TCS Prime Interview and Talked My Way Out of Hell Mode
Picture this, sitting in front of a panel of seasoned pros for a TCS Prime interview, your palms sweating, your brain rewinding every tutorial you e…
DSA | Random Generator | Can you come up with a solution?
Hi, I may post some DSA / interview questions I find interesting (even if you would be unlikely to see it in an interview) from some of the books I…
Frontend Interview Flow: Stages, Signals, and Prep
What is a frontend interview really looking for? Interviewers want proof you can ship a reliable UI—not how many frameworks you know. They check: Un…
The Follow-Up Questions That Decide System Design Interviews (And How to Pre-Empt Them)
Where Interviews Are Actually Won Ask interviewers where candidates separate, and almost none will say "the initial design." Prep materials have con…
How to Pass the Technical Interview: A Practical Guide for Arab Developers
Originally published on the Talents-OS blog . Disclosure: I work on Talents-OS. TL;DR: A practical preparation plan for technical interviews: interv…