Pass Your Salesforce Exam with JavaScript-Developer-I Exam Dumps (Updated 224 Questions)
JavaScript-Developer-I Exam Dumps - Salesforce Practice Test Questions
NEW QUESTION # 83
Which javascript methods can be used to serialize an object into a string and deserialize a JSON string into an object, respectively?
- A. JSON.serialize and JSON.deserialize
- B. JSON.encode and JSON.decode
- C. JSON.stringify and JSON.parse
- D. JSON.parse and JSON.deserialize
Answer: C
NEW QUESTION # 84
A developer has a web server running with Node.js. The command to start the web server is node server.js. The web server started having
latency issues. Instead of a one second turnaround for web requests, the developer now sees a five second turnaround.
Which command can the web developer run to see what the module is doing during the latency period?
- A. NODE_DEBUG=http,https node server.js
- B. NODE_DEBUG=true node server.js
- C. DEBUG=http, https node server.js
- D. DEBUG=true node server.js
Answer: D
NEW QUESTION # 85
Refer to the following code:
Which statement should be added to line 09 for the code to display. The truck 123AB has a weight of 5000 Ib. '?
- A. Super = (plate ) ;
- B. This .plate = plate;
- C. Vehicle.plate = plate
- D. Super.plate = plate;
Answer: A,B,C
NEW QUESTION # 86
Given the code below:
Which method can be used to provide a visual representation of the list of users and to allow sorting by the name or email attribute?
- A. console.groupCol lapsed (usersList) ;
- B. console.info(usersList) ;
- C. console.table(usersList) ;
- D. console.group(usersList) ;
Answer: D
NEW QUESTION # 87
Refer to the following code block:
What is the console output?
- A. > Better student Jackie got 100% on test.
- B. > Uncaught Reference Error
- C. > Jackie got 70% on test.
- D. > Better student Jackie got 70% on test.
Answer: A
NEW QUESTION # 88
Refer to the expression below:
Let x = ('1' + 2) == (6 * 2);
How should this expression be modified to ensure that evaluates to false?
- A. Let x = (1 + 2 ) == ( 6 / 2);
- B. Let x = (1 + 2) == ( '6' / 2);
- C. Let x = ('1' + ' 2') == ( 6 * 2);
- D. Let x = ('1' + 2) == ( 6 * 2);
Answer: D
NEW QUESTION # 89
Given the following code:
Let x =('15' + 10)*2;
What is the value of a?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: D
NEW QUESTION # 90
A developer writes the code below to calculate the factorial of a given number function sum(number){ return number * sum(number-1);
}
sum(3);
what is the result of executing the code.
- A. 0
- B. -Infinity
- C. Error
- D. 1
Answer: C
NEW QUESTION # 91
Refer to the HTML below:
Which JavaScript statement results in changing " The Lion."?
- A. document.querySelectorAll('$main $TONY').innerHTML = '" The Lion
- B. document.querySelector('$main li:nth-child(2)'),innerHTML = " The Lion. ';
- C. document.querySelector('$main li:second-child').innerHTML = " The Lion ';
- D. document.querySelector('$main li.Tony').innerHTML = '" The Lion ';
Answer: A
NEW QUESTION # 92
Given two expressions var1 and var2. What are two valid ways to return the logical AND of the two expressions and ensure it is data type Boolean ?
Choose 2 answers:
- A. var1.toBoolean() && var2toBoolean()
- B. Boolean(var1 && var2)
- C. var1 && var2
- D. Boolean(var1) && Boolean(var2)
Answer: B,D
NEW QUESTION # 93
A developer wants to create an object from a function in the browser using the code below:
Function Monster() { this.name = 'hello' };
Const z = Monster();
What happens due to lack of the new keyword on line 02?
- A. The z variable is assigned the correct object but this.name remains undefined.
- B. Window.m is assigned the correct object.
- C. The z variable is assigned the correct object.
- D. Window.name is assigned to 'hello' and the variable z remains undefined.
Answer: D
NEW QUESTION # 94
Given the requirement to refactor the code above to JavaScript class format, which class definition is correct?
- A. B
- B. D
- C. C
- D. A
Answer: D
NEW QUESTION # 95
Refer to the following code:
<html lang="en">
<body>
<div onclick = "console.log('Outer message') ;">
<button id ="myButton">CLick me<button>
</div>
</body>
<script>
function displayMessage(ev) {
ev.stopPropagation();
console.log('Inner message.');
}
const elem = document.getElementById('myButton');
elem.addEventListener('click' , displayMessage);
</script>
</html>
What will the console show when the button is clicked?
- A. Outer message
- B. Outer message
Inner message - C. Inner message
Outer message - D. Inner message
Answer: D
NEW QUESTION # 96
Given the code below:
const copy = JSON.stringify([ new String(' false '), new Bollean( false ), undefined ]); What is the value of copy?
- A. -- [ \"false\" , { } ]--
- B. -- [ \"false\" , false, undefined ]--
- C. -- [ \"false\" ,false, null ]--
- D. -- [ false, { } ]--
Answer: C
NEW QUESTION # 97
Refer to the following code:
What is the output of line 11?
- A. ["foo", "bar"]
- B. ["foo:1", "bar:2"]
- C. [1,2]
- D. ["bar", "foo"]
Answer: A
NEW QUESTION # 98
Refer to the followingcode:
- A. Outer message
- B. Button message
- C. Outer message
Inner message - D. Inner message
Outer message
Answer: B
NEW QUESTION # 99
A developer uses a parsed JSON string to work with user information as in the block below:
Which two option access the email attributes in the object? Choose 2 answers
- A. userInformation. email
- B. userInformation(email)
- C. userInformation ( ''email'' )
- D. userInformation. Get (''email'')
Answer: A,C
NEW QUESTION # 100
Refer to code below:
console.log(0);
setTimeout(() => (
console.log(1);
});
console.log(2);
setTimeout(() => {
console.log(3);
), 0);
console.log(4);
In which sequence will the numbers be logged?
- A. 0
- B. 01234
- C. 02413
- D. 02431
Answer: D
NEW QUESTION # 101
A developer wrote a fizzbuzz function thatwhen passed in a number, returns the following:
'Fizz' if the number is divisible by 3.
'Buzz' if the number is divisible by 5.
'Fizzbuzz' if the number is divisible by both 3 and 5.
Empty string if the number is divisible by neither 3 or 5.
Whichtwo test caseswill properly test scenarios for the fizzbuzz function?
Choose 2 answers
- A. let res = fizzbuzz(5);console.assert ( res === ' ' );
- B. let res = fizzbuzz(Infinity);console.assert ( res === '' )
- C. let res = fizzbuzz(3);console.assert ( res === ' buzz ' )
- D. let res = fizzbuzz(15);console.assert ( res === ' fizzbuzz ' )
Answer: B,C,D
NEW QUESTION # 102
Refer to the following array:
Let arr = [1, 2, 3, 4, 5];
Which three options result in x evaluating as [1,2]?
Choose 3 answer
- A. let x =arr.splice(0, 2);
- B. let x arr.filter((a) => (return a <= 2 });
- C. let x = arr.slice (2);
- D. let x = arr. slice (0, 2);
- E. let x = arr.filter ((a) => 2 }) ;
Answer: A,B,D
NEW QUESTION # 103
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