JavaScript Interview Workbook: 110 Questions with Model Answers, Follow-ups and Drills

The only JavaScript workbook you will need.

JavaScript interviews don't stop at the definition. The interviewer asks a follow-up, then asks you to tie it to something you've built. This workbook prepares you for all three.

What's inside

• 110 questions covering every concept interviewers draw from
• A model answer for each, covering the tradeoff and not just the definition
• The follow-up an interviewer is likely to ask next
• A drill for each question that you answer from your own work, in fillable boxes inside the PDF
• A concept map at the front showing all twelve areas at a glance
• Three levels: 37 Foundation, 54 Intermediate, 19 Senior
• A coverage table mapping every concept to its question

The twelve sections

Types and values · Variables and scope · Functions · Objects and prototypes · Arrays and collections · Asynchronous JavaScript · DOM and events · Modules and tooling · Errors, debugging and testing · Memory and performance · Patterns and paradigms · Built-ins and language evolution

Reflects current ECMAScript and browser support in 2026.

Format: 74-page A4 PDF with fillable drill boxes

ISBN: 978-93-345-6008-4

Written by Debayan Sen, a senior frontend engineer and tech lead with 13+ years of experience in frontend development.

Part of the Interview Practice Studio frontend series (Frontend 03)