Free Access Salesforce.JavaScript-Developer-I.v2022-12-09.q166 Practice Test (Page 30)

Question 141

A developer wants to use a module named universalContainersLib and then call functions from it.
How should a developer import every function from the module and then call the functions foo and bar?

A.import all from '/path/universalContainersLib.js';
universalContainersLib.foo();
universalContainersLib.bar ();

B.import {foo,bar} from '/path/universalCcontainersLib.js';
foo():
bar()?

C.import * as lib from '/path/universalContainersLib.js';
lib.foo();
lib. bar ();

D.import * from '/path/universalContainersLib.js';
universalContainersLib. foo ()7
universalContainersLib.bar ();

Question 142

Which javascript methods can be used to serialize an object into a string and deserialize
a JSON string into an object, respectively?

A.JSON.serialize and JSON.deserialize

B.JSON.encode and JSON.decode

C.JSON.parse and JSON.deserialize

D.JSON.stringify and JSON.parse

Question 143

Refer to the following code:

What is returned by the function call on line 13?

A.Line 13 throws an error.

B.Null value

C.Undefined value.

D.Undefined

Question 144

Which code statement below correctly persists an objects in local Storage ?

A.const setLocalStorage = ( jsObject) => {
window.localStorage.setItem(jsObject);
}

B.const setLocalStorage = (storageKey, jsObject) => {
window.localStorage.persist(storageKey, jsObject);
}

C.const setLocalStorage = (storageKey, jsObject) => {
window.localStorage.setItem(storageKey, JSON.stringify(jsObject));
}

D.const setLocalStorage = ( jsObject) => {
window.localStorage.connectObject(jsObject));
}

Question 145

Given the following code:
let x = null;
console.log(typeof x);
What is the output?

A."object"

B."undefined"

C."null"

D."x"

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