Free Salesforce JavaScript-Developer-I Exam Dumps Questions & Answers

Given the following code:
01 let x = null;
02 console.log(typeof x);
What is the output of line 02?

• A." undefined "
• B." null "
• C." x "
• D." object "

A developer wrote the following code to test a sum3 function that takes in an array of numbers and returns the sum of the first three numbers in the array. The test passes:
01 let res = sum3([1, 2, 3]);
02 console.assert(res === 6);
03
04 res = sum3([1, 2, 3, 4]);
05 console.assert(res === 6);
A different developer made changes to the behavior of sum3 to instead sum all of the numbers present in the array.
Which two results occur when running the test on the updated sum3 function?

• A.The line 05 assertion passes.
• B.The line 02 assertion passes.
• C.The line 02 assertion fails.
• D.The line 05 assertion fails.

Given the code below:
let numValue = 1982;
Which three code segments result in a correct conversion from number to string?

• A.let strValue = String(numValue);
• B.let strValue = numValue.toString();
• C.let strValue = numValue.toText();
• D.let strValue = (String)numValue;
• E.let strValue = ' ' + numValue;

Given the code below:
01 const delay = async delay = > {
02 return new Promise((resolve, reject) = > {
03 console.log(1);
04 setTimeout(resolve, delay);
05 });
06 };
07
08 const callDelay = async () = > {
09 console.log(2);
10 const yup = await delay(1000);
11 console.log(3);
12 };
13
14 console.log(4);
15 callDelay();
16 console.log(5);
What is logged to the console?

• A.4 2 1 5 3
• B.4 2 1 5 3
• C.1 4 2 3 5
• D.4 5 1 2 3

Refer to the following code block:
01 let array = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11];
02 let output = 0;
03
04 for (let num of array) {
05 if (output > 10) {
06 break;
07 }
08 if (num % 2 == 0) {
09 continue;
10 }
11 output += num;
12 }
What is the value of output after the code executes?

• A.36
• B.25
• C.11
• D.16