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Question 1

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

Options :

A : false

B :

true

C :

false

D : 0

Answer: A

Question 2

Analyze the code below:

let a = 10;

do {

console.log(--a);

} while (a > 3);

Which statement can replace the do ... while from the example above?

Options :

A :

while (a >= 3)

console.log(a--);

B :

while (a > 2)

console.log(--a);

C : while (a > 3)

console.log(--a);

D : while (a > 3)

console.log(a--);

Answer: C

Question 3

What does shadowing mean?

Options :

A : Declaring a local variable with the same name

as the previously declared global variable.

B : Declaring a global variable with the same name

as a previously declared global variable.

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

D : Changing the value of a variable.

Answer: A

Question 4

A recursive function is a function that:

Options :

A : does not use global variables.

B : does not return any value.

C : uses loop instructions.

D : calls itself again while running.

Answer: D

Question 5

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