Test your skills - Javascript - Quiz #1

If you are looking to appear for an interview at beginner to intermediate level of JavaScript programming skills, this interview session will definitely help you learn very basic concepts of the JavaScript. This quiz will cover very important concepts of JS like hoisting, closures, singleton pattern, arrays, the concept of "this", and event propagation etc.

This is a kind of rapid question answer round where you will be given 30 seconds for each question to answer. At the end of the 30 seconds countdown timer, the correct answer will be shown with an explanation to clarify the underlying concept.

In case you feel that you need more time to answer the questions, you may pause in between the countdown timer and think it through. Same you can do while reading the feedback.

You are learning these videos with tutor Sunil Syal. In case you have any query/feedback, I would be happy to take your comments. I generally respond as soon I get a query. But with the increase in the number of queries, please excuse if there is any delay.

[im_mr_ashkar]

for 4th question, I got study and undefined. I used the exact same code. When I changed settimeout callback function to arrow function, then I got study and study

[shishupishu]

your 2nd question when i write it in CMD it says error.

[Nemoniko]

The answer of question 08 is: undefined and Study Zone.
If the answer is b, the code is:

var title = "Fun Zone";

var obj = {
title: "Study Zone",
testOne: () => {
console.log(title);
},
testTwo: function() {
console.log(this.title);
}
}

obj.testOne();
obj.testTwo();

[wakasabbasid]

Answer to Question 15 is incorrect. I just checked on the terminal. countArr["five"] = "5" doesn't work.

[radhikashravgi]

Nice one👍🏻 Can u make more such videos

[seasonsunite]

Anyone else having a different result in answer 15? countArr['five'] = '5'; does nothing to the array