JavaScript-Developer-I Sample Questions Answers - JavaScript-Developer-I Test Quiz

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Salesforce Certified JavaScript Developer I Exam Sample Questions (Q147-Q152):

NEW QUESTION # 147
Refer to the code below:
let o = {
get js() {
let city1 = String("st. Louis");
let city2 = String(" New York");
return {
firstCity: city1.toLowerCase(),
secondCity: city2.toLowerCase(),
}
}
}
What value can a developer expect when referencing o.js.secondCity?

A. ' new york '
B. ' New York '
C. An error
D. Undefined

Answer: A

NEW QUESTION # 148
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. 1
C. Error
D. -Infinity

Answer: C

NEW QUESTION # 149
Refer to the code below:

Which code change should be made for the console to log only Row log when 'Click mel' is clicking?

A. Add event,stopPropagation (); to window.onLoad event hadler.
B. Add event,stopPropagation (); to printMessage function.
C. Add event,stopPropagation (); to printMessage function.
D. Add event,stopPropagation (); to window,onLoad event hadler.

Answer: A,C

NEW QUESTION # 150
Refer to the code snippet below:
Let array = [1, 2, 3, 4, 4, 5, 4, 4];
For (let i =0; i < array.length; i++)
if (array[i] === 4) {
array.splice(i, 1);
}
}
What is the value of array after the code executes?

A. [1, 2, 3, 4, 4, 5, 4]
B. [1, 2, 3, 5]
C. [1, 2, 3, 4, 5, 4, 4]
D. [1, 2, 3, 4, 5, 4]

Answer: A

NEW QUESTION # 151
Which javascript methods can be used to serialize an object into a string and deserialize
a JSON string into an object, respectively?

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

Answer: B

NEW QUESTION # 152
......

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