Question 1

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 2

If a variable stores the value false then the variable:

Options :

A : will no longer be used in the program.

B : is of the Math type.

C : is of the Logical type.

D : is of the Boolean type.

Answer: D

Question 3

Most errors in JavaScript code that the interpreter encounters

while the program is running cause exceptions to be thrown.

What do unhandled exception do?

Options :

A : The interpreter ignores unhandled exceptions,

the program continues to execute,

and no information is received.

B : An error message appears in the console

and the execution of the program is aborted.

C : An error message appears in the console

and program execution continues.

D : The interpreter removes the erroneous piece of code,

replaces it with corrected one,

and continues the program execution.

Answer: B

Question 4

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 : x

y

B : 10

20

C : point

D : 10

Answer: B

Question 5

Which of the following is not a loop instruction in JavaScript?

Options :

A : for ... of

B : for ... in

C : do ... while

D : if ... else

Answer: D

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