On this page: https://github.com/learning-zone/javascript-interview-questions
We have a section called "Q. What is the purpose of exec method?" with code below:

var pattern = /you/;
console.log(pattern.test("How are you?")); //you

Is it "exec" instead "test" ?

var pattern = /you/;
console.log(pattern.exec("How are you?")); // ["you", index: 8, input: "How are you?", groups: undefined]

Q. What is the purpose of seal method?

We have:

const object = {
    property: 'Welcome JS world'
};
Object.freeze(object);
object.property = 'Welcome to object world';
console.log(Object.isFrozen(object)); // Welcome to object world
delete object.property; // You cannot delete when sealed
console.log(object.property); //Welcome to object world

Maybe:

const object = {
    property: 'Welcome JS world'
};
Object.seal(object);
object.property = 'Welcome to object world';
console.log(Object.isSealed(object)); // true
delete object.property; // You cannot delete when sealed
console.log(object.property); //Welcome to object world

Object Destructuring:

const { i = 2, j = 4, k = 6 } = { n: 10 };

console.log("i: " + i); // 10 -> should be 2
console.log("j: " + j); // 4
console.log("k: " + k); // 6

8: What are global variables?

Your answer is:
Global variables are those that are available throughout the length of the code without any scope. The var keyword is used to declare a local variable but if you omit it then it will become a global variable

msg = "Hello"  // var is missing, it becomes global variable

The problem with global variables is the conflict of variable names of local and global scope. It is also difficult to debug and test the code that relies on global variables.

But I think that:

Global variables are those that are available throughout the length of the code without any scope. The var keyword is used to declare declares a function-scoped or globally-scoped variable but if you omit it then it will become a global variable only.

msg = "Hello"  // var is missing, it becomes a global variable

But var in the 'Block scope' is still a global variable:

var x = 1;

if (x === 1) {
  var x = 2;

  console.log(x);
  // expected output: 2
}

console.log(x);
// expected output: 2

297: In JavaScript, What is the difference between var x = 1 and x = 1?

Your Answer is:

‘var x = 1’ will create a variable within the current scope. Given this is declared in a function, x will not be available outside it unless explicitly returned.

‘x = 1’ will create a variable within the global scope. Thus, any other code can access and alter its value. It is generally a bad practice to use variables in a global scope.

But... I think that this is a wrong answer, Because in MDN :

The var statement declares a function-scoped or globally-scoped variable, optionally initializing it to a value.

and

in strict mode: 'x = 1' is not allowed.

So I hope you correct it.

Because JavaScript has 3 types of scope:

• Block scope
• Function scope
• Global scope

is there a way to generate anki / quizlet flashcards from these interview questions ? Could be useful for everyone who wants to use spaced repetition system.

Q. What are the conventions to be followed for the usage of swtich case?

maybe:
Q. What are the conventions to be followed for the usage of switch case?

The question is not listed in question list What is the object type

Its between 43. and 44. question

It that question the comments/object is not good, wrong firstName and lastName (object or comments needs to be fixed)

Q. What is the precedence order between local and global variables?

Current:

var msg = "Good morning";
function greeting() {
  msg = "Good Evening";
  console.log(msg);
}
greeting();

Maybe missed "var" in inner variable:

var msg = "Good morning";
function greeting() {
  var msg = "Good Evening";
  console.log(msg);
}
greeting();

On website, when first option in the table is clicked What is difference between document.getElementById() and document.querySelector()?, user is not redirected to the QnA section beneath the table.

The reason is a mismatch in ids.

The table entry link:

<a href="#q-what-is-difference-between-document-getelementbyid-and-document-queryselector">What is difference between document.getElementById() and document.querySelector()?</a>

QnA section header:

<h2 id="q-what-is-difference-between-documentgetelementbyid-and-documentqueryselector">Q. <strong><em>What is difference between document.getElementById() and document.querySelector()?</em></strong></h2>

h2 tag id is missing a few hyphens

Code below:
Q. How do you create an object with prototype?

const user = {
  name: 'John',
  printInfo: function () {
    console.log(`My name is ${this.name}.`);
  }
};

const admin = Object.create(person);
admin.name = "Nick"; // Remember that "name" is a property set on "admin" but not on "user" object
admin.printInfo(); // My name is Nick

Object.create(user) instead Object.create(person)

fd275d5#diff-5fbfdce5c2abc62be0d0053fc1639ecf9ed0ec06fafdd8cca32410f2c8f9d1ca

The problems folder was removed in this commit, was this intentional?