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Salesforce JavaScript-Developer-I Exam Overview:

Certification Vendor:	Salesforce
Exam Name:	Salesforce Certified JavaScript Developer I Exam
Exam Number:	JS-Dev-101 / JavaScript-Developer-I
Available Languages:	English, Japanese
Exam Price:	USD 200 (+ applicable taxes)
Exam Duration:	105 minutes
Exam Format:	Multiple-choice, Multiple-select
Certificate Validity Period:	No expiration; requires regular maintenance via Trailhead modules
Passing Score:	65%
Related Certifications:	Salesforce Certified Lightning Web Components Specialist Salesforce Certified Platform Developer I
Real Exam Qty:	60 scored + up to 5 unscored
Recommended Training:	Salesforce JavaScript Developer I Certification Prep
Exam Registration:	Salesforce Certification Registration
Sample Questions:	Salesforce JavaScript-Developer-I Sample Questions
Exam Way:	Online proctored or onsite at authorized testing centers
Pre Condition:	No formal prerequisites; 1–2 years of JavaScript development experience recommended
Official Syllabus URL:	https://trailhead.salesforce.com/credentials/javascript-developer-i

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Salesforce Certified JavaScript Developer (JS-Dev-101) Sample Questions (Q14-Q19):

NEW QUESTION # 14
Which javascript methods can be used to serialize an object into a string and deserialize a JSON string into an object, respectively?

A. JSON.stringify and JSON.parse
B. JSON.encode and JSON.decode
C. JSON.parse and JSON.deserialize
D. JSON.serialize and JSON.deserialize

Answer: A

NEW QUESTION # 15
myArraym can have one level, two levels, or more levels.
Which statement flattens myArray when it can be arbitrarily nested?

A. [ ] .concat {. . .myArray) ;
B. myArray. reduce ((prev, curr) => prev.concat(curr) [ ]);
C. myArray. join (","). split (",");
D. myArray.flat(Infinity);

Answer: B

NEW QUESTION # 16
A developer wants to use a module named universalContainerLib and then call functions from it.
How should a developer import every function from the module and then call the functions foo and bar?

A. import - as lib from '/path/universalContainerLib.js''
lib.foo( ) ;
lib. bar ( ) ;
B. import (foo,bar) from '/path/universalContainerLib.js''
foo ( ) ;
bar ( ) ;
C. import + from '/path/universalContainerLib.js''
universalContainersLib.foo( ) ;
universalContainersLib bar ( ) :
D. import all from '/path/universalContainerLib.js''
universalContainersLib.foo( ) ;
universalContainersLib bar ( ) :

Answer: A

NEW QUESTION # 17
Refer to the following code:

What is the value of output on line 11?

A. An error will occur due to the incorrect usage of the for...of statement on line 07.
B. [''foo'':1, ''bar'':2'']
C. [1, 2]
D. [''foo'', ''bar'']

Answer: A

NEW QUESTION # 18
A developer has code that calculates a restaurant bill, but generates incorrect answers while testing the code.

Which option allows the developer to step into each function execution within calculateBill?

A. Using the debugger command on line 03.
B. Using the debugger command on line 05.
C. Calling the console. Trace( total ) method on line 03.
D. Wrapping findsubtotal in a console .log method.

Answer: A

NEW QUESTION # 19
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