Salesforce Exam Javascript Developer I Topic 3 Question 81 Discussion

Actual exam question for Salesforce's Javascript Developer I exam

Question #: 81
Topic #: 3

[All Javascript Developer I Questions]

Refer to the code below:

Let str = 'javascript';

Str[0] = 'J';

Str[4] = 'S';

After changing the string indexvalues, the value of str is 'javascript'. What is the reason

for this value:

ANon-primitive values are mutable.

BNon-primitive values are immutable.

CPrimitive values are mutable.

DPrimitive values are immutable.

Show Suggested Answer

Suggested Answer: D

by Ronnie at May 28, 2024, 11:51 PM

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Marica

9 days ago

Okay, so I was totally convinced it was A) Non-primitive values are mutable, but now I'm second-guessing myself. These JavaScript questions can be tricky!

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Carlton

11 days ago

Ah, I was about to choose C) Primitive values are mutable, but then I remembered that strings are special in JavaScript. Gotta love those language quirks, am I right?

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I'm pretty sure the answer is D) Primitive values are immutable. Strings are primitive data types in JavaScript, so you can't actually modify the individual characters of a string. That's why the value of 'str' didn't change after the attempted changes.

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Susy

21 days ago

But what about arrays? Aren't they also non-primitive values but mutable?

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Leonida

25 days ago

I agree with Broderick. Non-primitive values like strings cannot be changed once they are created.

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Broderick

29 days ago

I think the answer is B) Non-primitive values are immutable.

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Salesforce Exam Javascript Developer I Topic 3 Question 81 Discussion

Contribute your Thoughts:

Marica

Carlton

Domingo

Susy

Leonida

Broderick