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Salesforce JavaScript Developer I Cert Practice Exam Questions and Answers
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Salesforce JavaScript Developer I Cert Practice Exam Questions and Answers Which two syntax examples correctly initialize a value to the variable strLang? A. let strLang = 'javascript'; B. const strLang = 'java' + 'script'; C. let strLang = javascript; D. str strLang = 'javascript'; - ANSWER-...

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  • October 31, 2024
  • 125
  • 2024/2025
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©EMILLECT 2024/2025 ACADEMIC YEAR. ALL RIGHTS RESERVED

FIRST PUBLISH OCTOBER 2024




Salesforce JavaScript Developer I Cert

Practice Exam Questions and Answers


Which two syntax examples correctly initialize a value to the variable strLang?




A. let strLang = 'javascript';


B. const strLang = 'java' + 'script';


C. let strLang = javascript;


D. str strLang = 'javascript'; - ANSWER✔✔-ANSWER:


A. let strLang = 'javascript';


B. const strLang = 'java' + 'script';




Additional Info:




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, ©EMILLECT 2024/2025 ACADEMIC YEAR. ALL RIGHTS RESERVED

FIRST PUBLISH OCTOBER 2024




Note that C doesn't have a value that has single quotes around the word 'javascript' and for D, 'str' is not

a proper identifier


Which statement sorts the following number array so it is in ascending order? const arr = [7, 3, 400, 10];




A. arr.sort();


B. arr.sort((a, b) => a - b);


C. arr.sort((a, b) => a < b);


D. arr.sort((a, b) => b - a); - ANSWER✔✔-ANSWER:


B. arr.sort((a, b) => a - b);




Additional Info:


A. The sort() function sorts values as strings, which will sort this as [10, 3, 400, 7].


C. The compare function expects a positive, negative, or 0 to be returned.


D. The compare function will actually reverse the order of the numbers.




Page 2/125

, ©EMILLECT 2024/2025 ACADEMIC YEAR. ALL RIGHTS RESERVED

FIRST PUBLISH OCTOBER 2024




Which statement sorts the following string array so it is in descending order? const arr = ["Banana",

"Orange", "Apple", "Mango"];




A. arr.sort();


B. arr.sort((a, b) => a - b);


C. arr.reverse();


D. arr.sort((a, b) => b - a); - ANSWER✔✔-ANSWER:


C. arr.reverse();




Additional Info:


A. The sort() function sorts values as strings in ASCENDING order: ["Apple", "Banana", "Mango",

"Orange"];


B,D. Expect a number array.


What are the different data types used in JavaScript? - ANSWER✔✔-ANSWER:


There are 8 basic data types in JavaScript:


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, ©EMILLECT 2024/2025 ACADEMIC YEAR. ALL RIGHTS RESERVED

FIRST PUBLISH OCTOBER 2024




1. Number for numbers of any kind: integer or floating-point, integers are limited by ±((2^53)-1).




2. BigInt is for integer numbers of arbitrary length.




3. String for strings. A string may have zero or more characters, there's no separate single-character type.




4. Boolean for true/false.




5. NULL for unknown values - a standalone type that has a single value null. Note, typeof null returns

"object" even though it is NOT and object.




6. Undefined for unassigned values - a standalone type that has a single value undefined.




7. Object for more complex data structures.




Page 4/125

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