Higher Test Marks with Free Online Javascript-Developer-I Exam Practice

Assess the CertsIQ’s updated Javascript-Developer-I exam questions for free online practice of your Salesforce Certified JavaScript Developer - Multiple Choice (JS-Dev-101) test. Our JS-Dev-101 Javascript Developer I dumps questions will enhance your chances of passing the Javascript Developer certification exam with higher marks.

Question 1

A developer has a web server running with Node.js. The command to start the web server is node server.js. The web server started having

latency issues. Instead of a one second turnaround for web requests, the developer now sees a five second turnaround.

Which command can the web developer run to see what the module is doing during the latency period?

Options :

A : NODE_DEBUG=true node server.js

B : DEBUG=http, https node server.js

C : NODE_DEBUG=http,https node server.js

D : DEBUG=true node server.js

Answer: D

Question 2

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?

Options :

A : 10

B : Nan

C : 5

D : Undefined

Answer: C

Question 3

What is the result of the code block?

Options :

A : The console logs only 'flag'.

B : The console logs 'flag' and another flag.

C : An error is thrown.

D : The console logs 'flag' and then an error is thrown.

Answer: D

Question 4

Given the code below:

const copy = JSON.stringify([ new String(' false '), new Bollean( false ), undefined ]);

What is the value of copy?

Options :

A : -- [ \''false\'' , { } ]--

B : -- [ false, { } ]--

C : -- [ \''false\'' , false, undefined ]--

D : -- [ \''false\'' ,false, null ]--

Answer: D

Question 5

Considering type coercion, what does the following expression evaluate to?

True + '13' + NaN

Options :

A : ' 113Nan '

B : 14

C : ' true13 '

D : ' true13NaN '

Answer: D