100% Free Javascript-Developer-I Practice Exam Questions and Answers

Stay Ahead with Latest Javascript-Developer-I Javascript Developer Practice Test Questions 2026

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Total 217 Questions | Updated On: Oct 25, 2026

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Question 1

Refer to the expression below:

Let x = ('1' + 2) == (6 * 2);

How should this expression be modified to ensure that evaluates to false?

A : Let x = ('1' + ' 2') == ( 6 * 2);

B : Let x = ('1' + 2) == ( 6 * 2);

C : Let x = (1 + 2) == ( '6' / 2);

D : Let x = (1 + 2 ) == ( 6 / 2);

Answer: B

Question 2

Refer to the code below:

Which value can a developer expect when referencing country,capital,cityString?

A : 'London'

B : undefined

C : An error

D : 'NaN'

Answer: D

Question 3

Refer to HTML below:

The current status of an Order: <span id =''status''> In Progress </span>

Which JavaScript statement changes the text 'In Progress' to 'Completed' ?

A : document.getElementById(''status'').Value = 'Completed' ;

B : document.getElementById(''#status'')[removed] = 'Completed' ;

C : document.getElementById(''status'')[removed] = 'Completed' ;

D : document.getElementById(''.status'')[removed] = 'Completed' ;

Answer: C

Question 4

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?

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 5

Refer to the following array:

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

Which three options result in x evaluating as [1, 2]?

Choose 3 answer

A : let x = arr. slice (2);

B : let x = arr. slice (0, 2);

C : let x arr.filter((a) => (return a <= 2 });

D : let x = arr.filter ((a) => 2 }) ;

E : let x =arr.splice(0, 2);

Answer: A,B,C

Page: 1 / 44

Total 217 Questions | Updated On: Oct 25, 2026

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