QUESTION: 1 Topic: 2, Exam Pool B

A developer is wondering whether to use, promise, then or provise, catch especially when a promise throws an error.

Which two promises are rejected? Choose 2 answers

Promise, rejected (Cool error here'), then (error => console (error ));
New promise (() => (throw `Cool error here `)) , then ((null, error => console, (error)));
New Promise((resolve, reject) => ( throw `Cool error here')) .catch (error => console (error ));
Promise , reject (`Cool error here `) , catch (error => console ,error (error));

Answer(s): B,C

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QUESTION: 2 Topic: 2, Exam Pool B

Refer to the code below:

What is the output if this function when called with an empty array?

Retruns 0
Throws an error
Return 10
Return NaN

Answer(s): C

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QUESTION: 3 Topic: 2, Exam Pool B

Refer to the code below:

A developer uses a client that makes a GET request that uses a promise to handle the request, getRequest returns a promise.

Which code modification can the developer make to gracefully handle an error?

A)

B)

C)

D)

Option A
Option B
Option C
Option D

Answer(s): A

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QUESTION: 4 Topic: 2, Exam Pool B

Refer to the following code that performs a basis mathematical operation on a provided input:

How should line o2 be written to ensure that x evaluated to 6 in the line below?

Let x calculate (`'g'');

Return Number (num + 10) / 3;
Return Number (num) + 10) / 3);
Return integer (num + 10) / 3;
Return Number (num + 10) / 3;

Answer(s): B

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Free Certified JavaScript Developer I Exam Braindumps (page: 1)

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QUESTION: 1 Topic: 2, Exam Pool B

QUESTION: 2 Topic: 2, Exam Pool B

QUESTION: 3 Topic: 2, Exam Pool B

QUESTION: 4 Topic: 2, Exam Pool B