Guides on coding education, placements, assessments and interview prep.
17 articles
You don't need to install MySQL to learn SQL. Here's how to practise queries against a real database that runs in your browser tab — and a study order that actually sticks.
Joins are where most SQL learners stall. Here's each join type explained by what it does to your row count, the traps that silently break queries, and how to debug a join that returns too many rows.
The SQL questions that actually come up in campus and fresher interviews — with the answers interviewers are listening for, and the follow-ups that separate memorised answers from real understanding.
Normalization, explained by fixing one broken table step by step — what each normal form actually prevents, and when experienced teams deliberately break the rules.
A live AI interviewer lets you rehearse out loud, on demand, without booking anyone's time. Here's how to use AI mock interviews to fix fluency, structure and nerves before the real round.
How an index actually works, why adding one sometimes changes nothing, and the handful of query rewrites that turn a slow report into a fast one.
Most resumes are filtered by software before a human ever sees them. Here's how Applicant Tracking Systems parse your resume, why good candidates get auto-rejected, and how to fix it in an afternoon.
A free online HTML, CSS and JavaScript playground with a live preview. Edit in three tabs and watch your page render instantly — perfect for learning web basics.
Run Ruby in your browser with no install. A short guide to the GoCode online Ruby compiler, from Hello World to reading input.
Run PHP in your browser with no XAMPP and no local server. A quick guide to the GoCode online PHP compiler, with runnable examples.
Run C# online with no Visual Studio and no setup. Here's how to compile and execute .NET C# in the browser with GoCode, plus starter examples.
Compile and run Go in your browser with no setup. A quick tour of the GoCode online Go compiler, from Hello World to reading input.
Write and run TypeScript in your browser with no install and no config. Here's how the GoCode online TypeScript compiler works, with beginner-friendly examples.
GoCode's online IDE now runs 12 languages — Python, Java, JavaScript, TypeScript, C, C++, C#, Go, PHP, Ruby and live web (HTML/CSS/JS and React). Here's what's new and how to use each one.
Strong coders lose offers in the HR round every season. Here's what LSRW — Listening, Speaking, Reading, Writing — actually measures and how to improve each skill in 30 minutes a day.
The Python questions interviewers actually ask freshers — lists vs tuples, decorators, GIL, comprehensions and more, each with a crisp answer you can say out loud.
A practical 90-day plan for final-year students: what to practice, in what order, and how to avoid the mistakes that cost most candidates their placement offers.
