Question 1

Analyze the following code:

let x = 10;

function test() {

let x = 20;

}

test();

console.log(x);

What will be displayed in the console as a result of its execution?

Options :

A : 10

B :

undefined

C : Nothing will show up.

D : "x"

Answer: A

Question 2

Analyze the following code:

let id = "100";

{

let id = 200;

id = id + 1;

console.log(id)

}

What will appear in the console as a result?

Options :

A : 1001

B : 201

C : 101

D : 200

Answer: B

Question 3

The minimum JavaScript online development environment will consist of:

(Select two correct answers)

Options :

A : a forum for developers to exchange information only

B : an online code editor

C : an interactive page with JavaScript documentation

D : the runtime environment

Answer: B,D

Question 4

We want to declare a protocol constant and initialize it with the value "http"

What should such a declaration look like?

Options :

A :

let const protocol = "http";

B :

let protocol; const protocol = "http";

C :

const protocol; protocol = "http";

D :

const protocol = "http";

Answer: D

Question 5

Review the following code (note the variable name)let height = 170;

height = height + 10;

console.log(Height);

As a result of its execution, the following should appear in the console:

Options :

A : "Height"

B : 180

C : "Uncaught ReferenceError: Height is not defined"

D : 170

Answer: C

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