Salesforce Exam Javascript Developer I Topic 3 Question 73 Discussion

Actual exam question for Salesforce's Javascript Developer I exam

Question #: 73
Topic #: 3

[All Javascript Developer I Questions]

A developer needs to test this function:

01const sum3 = (arr) => (

02if (!arr.length) return 0,

03if (arr.length === 1) return arr[0],

04if (arr.length === 2) return arr[0]+ arr[1],

05 return arr[0] + arr[1] + arr[2],

06 );

Which two assert statements are valid tests for the function?

Choose 2 answers

Aconsole.assert(sum3(1, '2')) == 12);

Bconsole.assert(sum3(0)) == 0);

Cconsole.assert(sum3(-3, 2 )) == -1);

Dconsole.assert(sum3('hello', 2, 3, 4)) === NaN);

Show Suggested Answer

Suggested Answer: B

by Venita at Feb 13, 2024, 10:41 AM

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Mammie

4 days ago

I'd go with B and C. The function seems to handle the basic cases, but it's always good to test the boundary conditions too.

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Tyra

7 days ago

Haha, D is a good one! Imagine passing a string to a function that expects numbers. The developer should really add more edge cases to their tests.

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Yaeko

8 days ago

D is definitely not valid, as the function expects an array and the input has strings. A might work, but I'm not sure if the function will handle non-numeric inputs correctly.

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Nickolas

17 days ago

I think B and C are the valid assert statements. The function should handle empty arrays, single-element arrays, and two-element arrays correctly.

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Melissa

2 days ago

B) console.assert(sum3(0)) == 0)

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Brigette

19 days ago

I also think option D) console.assert(sum3('hello', 2, 3, 4)) === NaN) is a valid test because it includes non-numeric values.

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Bettyann

22 days ago

I agree with Nell. Option B makes sense because it tests the function with an empty array.

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Nell

25 days ago

I think option B) console.assert(sum3(0)) == 0) is a valid test.

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