Given the following code: Let x =null; console.log(typeof x);
What is the output of the line 02?

1. A. “Null”
2. B. “X”
3. C. “Object”
4. D. “undefined”

Correct Answer: C

Refer to the code below:
Let car1 = new Promise((_ , reject) => setTimeout(reject, 2000, “car 1 crashed in” =>
Let car2 =new Promise(resolve => setTimeout(resolve, 1500, “car 2 completed”) Let car3 =new Promise(resolve => setTimeout(resolve, 3000, “car 3 completed”) Promise.race(( car1, car2, car3))
.t hen (value => (
Let result = ‘$(value) the race.’;)}
.catch(arr => {
console.log(“Race is cancelled.”, err);
});
What isthe value of result when Promise.race executes?

1. A. Car 3 completes the race
2. B. Car 2 completed the race.
3. C. Car 1 crashed in the race.
4. D. Race is cancelled.

Correct Answer: B

Refer to the code below: FunctionPerson(firstName, lastName, eyecolor) { this.firstName =firstName;
this.lastName = lastName;
this.eyeColor = eyeColor;
}
Person.job = ‘Developer’;
const myFather = new Person(‘John’, ‘Doe’); console.log(myFather.job);
What is the output after the codeexecutes?

1. A. ReferenceError: eyeColor is not defined
2. B. ReferenceError: assignment to undeclared variable “Person”
3. C. Developer
4. D. Undefined

Correct Answer: D

Refer to the code below:

Why does the function bar have access to variable a ?

1. A. Inner function’s scope
2. B. Hoisting
3. C. Outer function’s scope
4. D. Prototype chain

Correct Answer: C

Which statement phrases successfully?

1. A. JSON.parse ( ‘ foo ’ );
2. B. JSON.parse ( “ foo ” );
3. C. JSON.parse( “ ‘ foo ’ ” );
4. D. JSON.parse(‘ “ foo ” ’);

Correct Answer: D