[Jan-2024] Salesforce CRT-600 Test Engine PDF - All Free Dumps from Prep4sures
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NEW QUESTION # 121
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. { type : 'update', recordId : '123abc' }
- B. 'Update' , (
recordId : '123abc'
( - C. 'Update' , {
Details : {
recordId : '123abc'
}
} - D. 'Update' , '123abc'
Answer: B,C
NEW QUESTION # 122
A developer needs to debug a Node.js web server because a runtime error keeps occurring at one of the endpoints.
The developer wants to test the endpoint on a local machine and make the request against a local server to look at the behavior. In the source code, the server, js file will start the server. the developer wants to debug the Node.js server only using the terminal.
Which command can the developer use to open the CLI debugger in their current terminal window?
- A. node server,js inspect
- B. node start inspect server,js
- C. node -i server.js
- D. node inspect server,js
Answer: D
NEW QUESTION # 123
Refer to the code below:
Const searchTest = 'Yay! Salesforce is amazing!" ;
Let result1 = searchText.search(/sales/i);
Let result 21 = searchText.search(/sales/i);
console.log(result1);
console.log(result2);
After running this code, which result is displayed on the console?
- A. > true > false
- B. > 5 > -1
- C. > 5 > 0
- D. > 5 >undefined
Answer: D
Explanation:
NEW QUESTION # 124
Refer the following code
what is the value of array after code executes?
- A. [ 1, 2, 3, 5 ]
Answer: A
NEW QUESTION # 125
Refer to the code below:
const addBy = ?
const addByEight =addBy(8);
const sum = addBYEight(50);
Which two functions can replace line 01 and return 58 to sum?
Choose 2 answers
- A. const addBy = function(num1){
return function(num2){
return num1 + num2;
} - B. const addBy = function(num1){
return num1 + num2;
} - C. const addBy = (num1) => num1 + num2 ;
- D. const addBY = (num1) => (num2) => num1 + num2;
Answer: A,D
NEW QUESTION # 126
Refer to the code below:
let sayHello = () => {
console.log ('Hello, world!');
};
Which code executes sayHello once, two minutes from now?
- A. delay(sayHello, 12000);
- B. setTimeout(sayHello(), 12000);
- C. setTimeout(sayHello, 12000);
- D. setInterval(sayHello, 12000);
Answer: C
NEW QUESTION # 127
Refer to the code below:
What is the output of this function when called with an empty array?
- A. Return Infinity
- B. Return 0
- C. Return NaN
- D. Return 5
Answer: D
NEW QUESTION # 128
developer publishes a new version of a package with new features that do not break backward compatibility. The previous version number was 1.1.3.
Following semantic versioning format, what should the new package version number be?
- A. 1.2.3
- B. 1.2.0
- C. 1.1.4
- D. 2.0.0
Answer: B
NEW QUESTION # 129
Which statement phrases successfully?
- A. JSON.parse(' " foo " ');
- B. JSON.parse( " ' foo ' " );
- C. JSON.parse ( ' foo ' );
- D. JSON.parse ( " foo " );
Answer: A
NEW QUESTION # 130
Which three options show valid methods for creating a fat arrow function?
Choose 3 answers
- A. (x,y,z) => ( console.log(' executed ') ;)
- B. X,y,z => ( console.log(' executed ') ;)
- C. [ ] => ( console.log(' executed ') ;)
- D. x => ( console.log(' executed ') ; )
- E. ( ) => ( console.log(' executed ') ;)
Answer: A,D
NEW QUESTION # 131
What are two unique features of functions defined with a fat arrow as compared to normal function definition?
Choose 2 answers
- A. The function uses the this from the enclosing scope.
- B. The function receives an argument that is always in scope, called parentThis, which is the enclosing lexical scope. C. If the function has a single expression in the function body, the expression will be evaluated and implicit returned.
- C. The function generated its own this making it useful for separating the function's scope from its enclosing scope.
Answer: B,C
NEW QUESTION # 132
Refer to the code below:
Async funct on functionUnderTest(isOK) {
If (isOK) return 'OK' ;
Throw new Error('not OK');
)
Which assertion accurately tests the above code?
- A. Console.assert (await functionUnderTest(true), ' not OK ')
- B. Console.assert (await functionUnderTest(true), ' not OK ')
- C. Console.assert (await functionUnderTest(true), 'OK')
- D. Console.assert (await functionUnderTest(true), ' OK ')
Answer: C
NEW QUESTION # 133
What is the result of the code block?
- A. An error is thrown.
- B. The console logs 'flag' and another flag.
- C. The console logs only 'flag'.
- D. The console logs 'flag' and then an error is thrown.
Answer: D
NEW QUESTION # 134
A developer has code that calculates a restaurant bill, but generates incorrect answers while testing the code:
function calculateBill ( items ) {
let total = 0;
total += findSubTotal(items);
total += addTax(total);
total += addTip(total);
return total;
}
Which option allows the developer to step into each function execution within calculateBill?
- A. Calling the console.trace (total) method on line 03.
- B. Using the debugger command on line 05.
- C. Wrapping findSubtotal in a console.log() method.
- D. Using the debugger command on line 03
Answer: B
NEW QUESTION # 135
Given the requirement to refactor the code above to JavaScript class format, which class definition is correct?
- A. D
- B. C
- C. A
- D. B
Answer: C
NEW QUESTION # 136
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. 02431
- B. 0
- C. 02413
- D. 01234
Answer: A
NEW QUESTION # 137
Given the following code:
What is the output of line 02?
- A. "undefined" 0
- B. "null"
- C. 'object"
- D. "x-
Answer: C
NEW QUESTION # 138
Universal Containers (UC) notices that its application that allows users to search for accounts makes a network request each time a key is pressed. This results in too many requests for the server to handle.
* Address this problem, UC decides to implement a debounce function on string change handler.
What are three key steps to implement this debounce function?
Choose 3 answers:
- A. If there is an existing setTimeout and the search string changes, cancel the existing setTimeout using the persisted timerId and replace it with a new setTimeout.
- B. If there is an existing setTimeout and the search string change, allow the existing setTimeout to finish, and do not enqueue a new setTimeout.
- C. Store the timeId of the setTimeout last enqueued by the search string change handle.
- D. Ensure that the network request has the property debounce set to true.
- E. When the search string changes, enqueue the request within a setTimeout.
Answer: B,D,E
NEW QUESTION # 139
The developer wants to test this code:
Const toNumber =(strOrNum) => strOrNum;
Which two tests are most accurate for this code?
Choose 2 answers
- A. console.assert(toNumber('2') === 2);
- B. console.assert(toNumber () === NaN);
- C. console.assert(Number.isNaN(toNumber()));
- D. console.assert(toNumber('-3') < 0);
Answer: A,D
NEW QUESTION # 140
A developer has a formatName function that takes two arguments, firstName and lastName and returns a string. They want to schedule the function to run once after five seconds.
What is the correct syntax to schedule this function?
- A. setTimeout (formatName('John', ''Doe'), 5000);
- B. setTimeout (formatName(), 5000, "John", "BDoe");
- C. setTimeout ('formatName', 5000, 'John", "Doe');
- D. setTimout(() => { formatName("John', 'Doe') }, 5000);
Answer: C
NEW QUESTION # 141
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, { } ]--
- C. -- [ \"false\" ,false, null ]--
- D. -- [ \"false\" , false, undefined ]--
Answer: C
NEW QUESTION # 142
developer removes the HTML class attribute from the checkout button, so now it is simply:
<button>Checkout</button>.
There is a test to verify the existence of the checkout button, however it looks for a button with class= "blue". The test fails because no such button is found.
Which type of test category describes this test?
- A. True positive
- B. False positive
- C. True negative
- D. False negative
Answer: D
NEW QUESTION # 143
Given the JavaScript below:
Which code should replace the placeholder comment on line 06 to hide accounts that do not match the search string?
- A. 'Visible : 'hidden'
- B. 'Hidden, visible
- C. 'Block' : 'none'
- D. 'None' : 'block'
Answer: C
NEW QUESTION # 144
Refer to the code below:
Async funct on functionUnderTest(isOK) {
If (isOK) return 'OK' ;
Throw new Error('not OK');
)
Which assertion accuretely tests the above code?
- A. Console.assert (await functionUnderTest(true), ' not OK ')
- B. Console.assert (await functionUnderTest(true), ' not OK ')
- C. Console.assert (await functionUnderTest(true), 'OK')
- D. Console.assert (await functionUnderTest(true), ' OK ')
Answer: C
NEW QUESTION # 145
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