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      Testsigma

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      Senior Frontend Developer Interview

      26 Apr 2025
      Anonymous interview candidate
      Bengaluru
      No offer
      Neutral experience
      Average interview

      Application

      I applied through an employee referral. The process took 4 weeks. I interviewed at Testsigma (Bengaluru) in Mar 2025

      Interview

      The interview process had four rounds: First Round - HackerRank Test: An online coding assessment consisting of algorithm and data structure-based questions. Example topics included array manipulation, string handling, basic JavaScript logic, and problem-solving tasks. Second Round - JavaScript Conceptual Interview: A technical interview focused on JavaScript fundamentals and web concepts. Questions included writing polyfills (like for reduce), DOM loading strategies (explaining async vs defer), how websites load from URL typing to page rendering, and basic function behavior tracing. Third Round - Machine Coding Round: A hands-on practical round where I was asked to build a small tool — specifically, a Box Shadow Generator — based on given functional and UI requirements. The focus was on implementing real-time input handling, DOM manipulation, and generating usable CSS code. Fourth Round - HR Discussion (If Selected in Technical Rounds): Candidates who cleared all technical rounds would move to an HR discussion covering general HR questions, salary expectations, notice period, and cultural fit assessment.

      Interview questions [5]

      Question 1

      JavaScript - Basic Functions Understanding function invoke(message) { console.log(messages); } function sendMessage(message){ invoke(message) } sendMessage("Hello,") sendMessage("world ") sendMessage("! ") output should be this ["Hello,", "world ", "! "] and it should print only one time and you are allowed to change only function declarations not funtion calls
      1 Answer

      Question 2

      JavaScript - Polyfill for reduce()
      1 Answer

      Question 3

      Web Fundamentals - How a URL Loads When we type www.google.com in the browser, what happens step by step?
      1 Answer

      Question 4

      Follow-up: JS DOM Manipulation Timing Issue If JavaScript code that manipulates the DOM is written before the DOM is fully loaded, how do we prevent errors?
      1 Answer

      Question 5

      Round 2 Practical Round - Create a Box Shadow Generator Tool A small tool needs to be created to generate CSS Box Shadows dynamically in React. (https://docs.google.com/document/d/1fj_DiZNOTpP6hOGntylWuhFGTitbWerSjd0QF18wb8k/edit?usp=sharing)
      Answer question

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