JavaScript-Developer-I Practice Test

Refer to code below:
Const objBook = {
Title: ‘Javascript’,
};
Object.preventExtensions(objBook);
Const newObjBook = objBook;
newObjectBook.author = ‘Robert’;
What are the values of objBook and newObjBook respectively ?

A.

[title: “javaScript”] [title: “javaScript”]

B.

{author: “Robert”, title: “javaScript}
Undefined

C.

{author: “Robert”, title: “javaScript}
{author: “Robert”, title: “javaScript}

D.

{author: “Robert”}
{author: “Robert”, title: “javaScript}

A developer wants to define a function log to be used a few times on a single-file
JavaScript script.
01 // Line 1 replacement
02 console.log('"LOG:', logInput);
03 }
Which two options can correctly replace line 01 and declare the function for use?
Choose 2 answers

A.

function leg(logInput) {

B.

const log(loginInput) {

C.

const log = (logInput) => {

D.

function log = (logInput) {

Refer to the code below:
Function changeValue(obj) {
Obj.value = obj.value/2;
}
Const objA = (value: 10);
Const objB = objA;
changeValue(objB);
Const result = objA.value;
What is the value of result after the code executes?

A.

10

B.

Nan

C.

5

D.

Undefined

developer uses the code below to format a date.

let timerId = setTimeout (timedFunction, 1000);
Which statement allows a developer to cancel the scheduled timed function?

A.

A. removeTimeout(timedFunction);

B.

removeTimeout(timerId);

C.

clearTimeout(timerId);

D.

clearTimeout(timedFunction);

let timerId = setTimeout (timedFunction, 1000);
Which statement allows a developer to cancel the scheduled timed function?

A.

removeTimeout(timedFunction);

B.

removeTimeout(timerId);

C.

clearTimeout(timerId);

D.

clearTimeout(timedFunction);