JavaScript Interview Questions

Q101 What primitive types does JavaScript support? ✓ Answered → Q102 Is null a primitive type in JavaScript? ✓ Answered → Q103 What is the result of typeof null? ✓ Answered → Q104 What is the difference between let, const and var? ✓ Answered → Q105 What is the difference between null and undefined in JavaScript? ✓ Answered → Q106 How do you implement a data structure like a stack or queue in JavaScript? ✓ Answered → Q107 What is the purpose of the 'map' function in JavaScript? ✓ Answered → Q108 What is the purpose of the 'reduce' function in JavaScript? ✓ Answered → Q109 What is the purpose of the 'try-catch' block in JavaScript? ✓ Answered → Q110 What is the concept of 'this' in JavaScript and how is it used? ✓ Answered → Q111 What is the purpose of the 'map' function in JavaScript? ✓ Answered → Q112 What is the purpose of the 'reduce' function in JavaScript? ✓ Answered → Q113 What is the difference between null and undefined in JavaScript? ✓ Answered → Q114 How do you write a unit test for a JavaScript function using Jest? ✓ Answered → Q115 What is the difference between a class and an object in JavaScript? ✓ Answered → Q116 What is the purpose of the 'bind' method in JavaScript? ✓ Answered → Q117 Explain the concept of polymorphism in JavaScript. ✓ Answered → Q118 What is the difference between a GET and a POST request in HTTP? ✓ Answered → Q119 Explain the concept of inheritance in JavaScript. ✓ Answered → Q120 What is the difference between REST and SOAP APIs? ✓ Answered →