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Salesforce JavaScript-Developer-I Exam Syllabus Topics:

Section	Objectives
Topic 1: Browser and DOM Interaction	- DOM manipulation and traversal - Event handling and propagation - Browser APIs (fetch, storage, timers)
Topic 2: JavaScript Language Fundamentals	- Functions, scope, and closures - Data types, variables, and operators - ES6+ syntax and features
Topic 3: Testing and Debugging	- Debugging techniques and tools - Unit testing principles
Topic 4: Asynchronous JavaScript	- Promises and async/await - Error handling in async workflows - Event loop and concurrency model
Topic 5: Salesforce Platform Integration	- Lightning Web Components (LWC) JavaScript usage - Security considerations in Salesforce JavaScript - Calling Apex methods from JavaScript

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JavaScript-Developer-I Latest Test Cram - JavaScript-Developer-I Exam Question

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Salesforce Certified JavaScript Developer (JS-Dev-101) Sample Questions (Q94-Q99):

NEW QUESTION # 94
Refer to the code below:

Line 05 causes an error.
What are the values of greeting and salutation once code completes?

A. Greeting is Goodbye and salutation is Hello, Hello.
B. Greeting is Hello and salutation is I say hello.
C. Greeting is Hello and salutation is Hello, Hello.
D. Greeting is Goodbye and salutation is I say Hello.

Answer: C

NEW QUESTION # 95
The developer has a function that prints "Hello" to an input name. To test this, thedeveloper created a function that returns "World". However the following snippet does not print " Hello World".

What can the developer do to change the code to print "Hello World" ?

A. Change line 5 to function world ( ) {
B. Change line 9 to sayHello(world) ();
C. Change line 2 to console.log('Hello' , name() );
D. Change line 7 to ) () ;

Answer: C

NEW QUESTION # 96
Considering type coercion, what does the following expression evaluate to?
true + ' 13 ' + NaN

A. ' true13NaN '
B. ' 113NaN '
C. ' true13 '
D. 0

Answer: A

Explanation:
Expression:
true + ' 13 ' + NaN
The + operator is left-associative, so evaluation order:
* true + ' 13 '
* When one operand is a string, + performs string concatenation.
* true is converted to string ' true ' .
* ' true ' + ' 13 ' # ' true13 ' .
* Result from step 1 with NaN:
' true13 ' + NaN
* Again, one operand is a string, so concatenation.
* NaN is converted to string ' NaN ' .
* ' true13 ' + ' NaN ' # ' true13NaN ' .
Final value: ' true13NaN ' .
So A is correct.
Why others are wrong:
* B: ' 113NaN ' would require true to coerce to 1 first and no string to be present, which is not the case because ' 13 ' forces string concatenation.
* C: 14 would require pure numeric addition, which is not the case once a string is involved.
* D: ' true13 ' ignores the final + NaN part.
Concepts: type coercion with +, boolean to string, NaN to string, left-associative evaluation.

NEW QUESTION # 97
A developer copied a JavaScript object:

How does the developer access dan's forstName,lastName? Choose 2 answers

A. dan,firstname ( ) + dan, lastName ( )
B. dan,name ( )
C. dan, firstName =dan.lastName
D. dan,name

Answer: B,C

NEW QUESTION # 98
A developer receives a comment from the Tech Lead that the code given below has
error:
const monthName = 'July';
const year = 2019;
if(year === 2019) {
monthName = 'June';
}
Which line edit should be made to make this code run?

A. 03 if (year == 2019) {
B. 01 let monthName ='July';
C. 02 let year =2019;
D. 02 const year = 2020;

Answer: B

NEW QUESTION # 99
......

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