Free Salesforce Javascript-Developer-I Exam Questions

Become Salesforce Certified with updated Javascript-Developer-I exam questions and correct answers

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Total 217 Questions | Updated On: Jan 09, 2025

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Question 1

What is the result of the code block?

A : console logs only 'flag'.

B : console logs 'flag' and another flag.

C : error is thrown.

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

Answer: D

Question 2

Given the code below:

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

What is the value of copy?

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

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

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

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

Answer: D

Question 3

A developer wrote the following code to test a sum3 function that takes in an array of numbers and returns the sum of the first three numbers in the array, and the test passes.

A different developer made changes to the behavior of sum3 to instead sum only the first two numbers present in the array.

Which two results occur when running this test on the updated sum3 function?

Choose 2 answers

A : line 05 assertion passes.

B : line 02 assertion passes.

C : line 02 assertion fails.

D : line 05 assertion fails.

Answer: B,D

Question 4

Which javascript methods can be used to serialize an object into a string and deserialize

a JSON string into an object, respectively?

A : ON.stringify and JSON.parse

B : ON.serialize and JSON.deserialize

C : ON.encode and JSON.decode

D : ON.parse and JSON.deserialize

Answer: A

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 : t x = arr. slice (2);

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

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

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

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

Answer: A,B,C

Page: 1 / 44

Total 217 Questions | Updated On: Jan 09, 2025

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