Top 25 Javascript Interview Questions for Test Automation SDET - Playwright & Cypress
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In this video, I will show you most asked JavaScript Interview questions with detailed explanation on each topic. Great helpful for Test Automation folks in preparing Playwright & Cypress interviews. Below are the questions with time stamp
00:21 - Can a JavaScript object hold a function as a property? Explain with an example.
03:28 - What are anonymous functions in JavaScript? Define their syntax and implementation.
07:22 - What is the difference between var, const, and let? Explain with an example.
16:26 - Where are the push, pop, slice, shift, and unshift methods used when accessing array elements?
23:19 - Is JavaScript Asynchronous? Prove with an example.
27:53 - What are callback functions in JavaScript?
38:09 - What are promises in JavaScript? Explain the difference between callback functions and promises with an example.
49:15 - Create an inheritance relationship between a parent and child class. Invoke the parent constructor from the child class. Create main.js to call parent class methods from a child class object.
55:21 - From the above code, explain how the super and these keywords help achieve the solution.
01:00:05 - What is the difference between == and ===?
01:03:32 - What is the difference between null and undefined in JavaScript?
01:06:36 - A classic programming interview question that involves using array methods (filter, map, reduce), and JavaScript objects.