Refer to the following array:
Let arr1 = [ 1, 2, 3, 4, 5 ];

Which two lines of code result in a second array, arr2 being created such that arr2 is not a reference to arr1?

• A.Let arr2 = arr1.sort();
• B.Let arr2 = arr1.slice(0, 5);
• C.Let arr2 = arr1;
• D.Let arr2 = Array.from(arr1);

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Refer to the code below:
const event = new CustomEvent(
//Missing Code
);
obj.dispatchEvent(event);
A developer needs to dispatch a custom event called update to send information about
recordId.
Which two options could a developer insert at the placeholder in line 02 to achieve this?
Choose 2 answers

• A.'Update' , (
  recordId : '123abc'
  (
• B.'Update' , '123abc'
• C.{ type : 'update', recordId : '123abc' }
• D.'Update' , {
  Details : {
  recordId : '123abc'

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Given the following code:

What will be the first four numbers logged?

• A.0012
• B.0123
• C.0112
• D.0122

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Refer to the code below:

What is the output of this function when called with an empty array?

• A.Return NaN
• B.Return 0
• C.Return Infinity
• D.Return 5

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A developer is debugging a web server that uses Node.js. The server hits a runtime error every third request to an important endpoint on the web server.
The developer added a break point to the start script, that is at index, js at the root of the server's source code. The developer wants to make use of Chrome DevTools to debug.
Which command can be run to access DevTools and make sure the breakpoint is hit?

• A.Node -I index , js
• B.Node inspect index , js
• C.Node -- inspect index ,js
• D.Node --inspect -brk index , js

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