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 point = {x: 10, y: 20};for (let f in point) { console.log(point[f]);}What will appear on the console as a result of its execution?

Options :

A : xy

B : 1020

C : point

D : 10

Answer: B

Question 3

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

Question 4

The result of the operation false || "false" will be:

Options :

A : false

B : true

C : false

D : 0

Answer: A

Question 5

What does shadowing mean?

Options :

A : Declaring a local variable with the same nameas the previously declared global variable.

B : Declaring a global variable with the same nameas a previously declared global variable.

C : Deleting and rewriting a selected piece of program code.

D : Changing the value of a variable.

Answer: A

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