Free Salesforce Javascript Developer I Exam Dumps and Javascript Developer I Exam Questions

Question No: 1

MultipleChoice

A developer has code that calculates a restaurant bill, but generates incorrect answers while testing the code.

Which option allows the developer to step into each function execution within calculateBill?

Options

AUsing the debugger command on line 05.

BUsing the debugger command on line 03.

CCalling the console. Trace( total ) method on line 03.

DWrapping findsubtotal in a console .log method.

Question No: 2

MultipleChoice

The developer has a function that prints ''Hello'' to an input name. To test this, the developer created a function that returns world''.

What can the developer do to change the code to print ''Hello world''?

Options

AChange line 7 to ) () ;

BChange line 2 to console.log ( 'Hello', name () );

CChange line 9 to sayhello (world () ;

DChange line 5 to function world () (

Question No: 3

MultipleChoice

Refer to the code below:

Which code executes syhello once, two minutes from now?

Options

ASetTimeout (sayhello, 120000) ;

BSetInterval (sayhello, 120000) ;

CSetTimeout (sayhello( ), 120000) ;

Ddelay (sayhello, 120000) ;

Question No: 4

MultipleChoice

Refer to the code below:

What is result of the code block?

Options

AThe console logs only 'flag',

BThe console logs 'flag' and another flag',

CAn error is thrown.

DThe console logs flag' and then an error is thrown.

Question No: 5

MultipleChoice

Refer to the following code that imports a module named Utills,

Which two implementations of Utill, je export foo and bar such that the code above runs without error?

Choose 2 answers

Options

A//FooUtill.js and barUtils, js exist
Import (foo) from ,/Path/footUtils.js,:
Export (foo, bar)

BConst foo = () => ( return 'foo ' ; )
Const bar => ( return 'bar' ; )
Export (foo, bar)

CExport default class (
Foo ( ) ( return 'foo ,; )
Bar ( ) ( return ;bar ; )

DConst foo = ( ) => ( return 'foo; ; )
Const bar => => { return 'bar ';}
Export default foo, bar;

Question No: 6

MultipleChoice

Refer to the following code:

Which statement should be added to line 09 for the code to display 'The boat has a capacity of 10 people?

Options

Asuper.size = size;

Bship.size size;

Csuper (size);

Dthis.size = size;

Question No: 7

MultipleChoice

Refer to the code snippet below:

Let array = [1, 2, 3, 4, 4, 5, 4, 4];

For (let i =0; i < array.length; i++){

if (array[i] === 4) {

array.splice(i, 1);

}

What is the value of the array after the code executes?

Options

A[1, 2, 3, 4, 5, 4, 4]

B[1, 2, 3, 4, 4, 5, 4]

C[1, 2, 3, 4, 5, 4]

D[1, 2, 3, 5]

Question No: 8

MultipleChoice

developer wants to use a module named universalContainersLib and them call functions

from it.

How should a developer import every function from the module and then call the fuctions foo

and bar ?

Options

Aimport * ad lib from '/path/universalContainersLib.js';
lib.foo();
lib.bar();

Bimport (foo, bar) from '/path/universalContainersLib.js';
foo();
bar();

Cimport all from '/path/universalContaineraLib.js';
universalContainersLib.foo();
universalContainersLib.bar();

Dimport * from '/path/universalContaineraLib.js';
universalContainersLib.foo();
universalContainersLib.bar();

Question No: 9

MultipleChoice

A developer creates a new web server that uses Node.js. It imports a server library that uses events and callbacks for handling server functionality.

The server library is imported with require and is made available to the code by a variable named server. The developer wants to log any issues that the server has while booting up.

Given the code and the information the developer has, which code logs an error at boot time with an event?

A)

B)

C)

D)

Options

AOption A

BOption B

COption C

DOption D

Question No: 10

MultipleChoice

Refer to the following code:

What is returned by the function call on line 13?

Options

AUndefined

BLine 13 throws an error.

CUndefined value.

DNull value