Free Practice JS Institute JSE-40-01 Exam Questions 2025

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?

Which of the following loop instructions is intended only to loop

through all elements of the indicated array?

If a variable stores the value false then the variable:

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?

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: