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NEW QUESTION # 121
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 number in the array, The test passes:
Let res = sum2([1, 2, 3 ]) ;
console.assert(res === 6 );
Res = sum3([ 1, 2, 3, 4]);
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. The test passes:
Which two results occur when running the test on the updated sum3 function ?
Choose 2 answers
- A. The line 02 assertion passes.
- B. The line 05 assertion fails.
- C. The line 02 assertion fails
- D. The line 05 assertion passes.
Answer: A,B
NEW QUESTION # 122
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. 'Block' : 'none'
- B. 'Visible : 'hidden'
- C. 'Hidden, visible
- D. 'None' : 'block'
Answer: A
NEW QUESTION # 123
Given the HTML below:
Which statement adds the priority-account CSS class to the Universal Containers row?
- A. document. querySelector (#row-uc'). classes-push('priority-account');
- B. document. querySelectorAll('#row-uc') -classList.add("priority-accour');
- C. document. getElementByid('row-uc').addClass('priority-account*);
- D. document. queryselector('#row-uc').ClassList.add('priority-account');
Answer: D
NEW QUESTION # 124
developer uses the code below to format a date.
After executing, what is the value of formattedDate?
- A. May 10, 2020
- B. June 10, 2020
- C. November 05, 2020
- D. October 05, 2020
Answer: B
NEW QUESTION # 125
Given the expressions var1 and var2, what are two valid ways to return the concatenation of the two expressions and ensure it is string? Choose 2 answers
- A. string.concat (var1 +var2)
- B. String (var1) .concat (var2)
- C. var1.toString ( ) var2.toString ( )
- D. var1 + var2
Answer: A,C
NEW QUESTION # 126
Universal Containers recently launched its new landing page to host a crowd-funding campaign. The page uses an external library to display some third-party ads. Once the page is fully loaded, it creates more than 50 new HTML items placed randomly inside the DOM, like the one in the code below:
All the elements includes the same ad-library-item class, They are hidden by default, and they are randomly displayed while the user navigates through the page.
- A. Use the browser console to execute a script that prevents the load event to be fired.
- B. Use the DOM inspector to remove all the elements containing the class ad-library-item.
- C. Use the browser to execute a script that removes all the element containing the class ad-library-item.
- D. Use the DOM inspector to prevent the load event to be fired.
Answer: C
NEW QUESTION # 127
Given HTML below:
<div>
<div id ="row-uc"> Universal Container</div>
<div id ="row-aa">Applied Shipping</div>
<div id ="row-bt"> Burlington Textiles </div>
</div>
Which statement adds the priority = account CSS class to the universal Containers row ?
- A. Document .querySelector('#row-uc').classList.add('priority-account');
- B. Document .querySelector('#row-uc').classes.push('priority-account');
- C. Document .querySelectorALL('#row-uc').classList.add('priority-account');
- D. Document .queryElementById('row-uc').addclass('priority-account');
Answer: D
NEW QUESTION # 128
A developer writes the code below to calculate the factorial of a given number.
What is the result of executing line 04?
- A. 0
- B. 1
- C. RuntimeError
- D. -Infinity
Answer: C
NEW QUESTION # 129
A developer wants to create an object from a function in the browser using the code below.
What happens due to lack of the new keyword on line 02?
- A. Window. === name is assigned to ''hello'' and the variable a n remain undefined.
- B. The a variable is assigned the correct object.
- C. Window. n is assigned the correct object.
- D. The n variable is assigned the correct object but this- remains undefined.
Answer: A
NEW QUESTION # 130
Refer to the code below:
01 const server = require('server');
02 /* Insert code here */
A developer imports a library that creates a web server. The imported library uses events and
callbacks to start the servers
Which code should be inserted at the line 03 to set up an event and start the web server ?
- A. server()
- B. serve(( port) => (
- C. server.on(' connect ' , ( port) => {
console.log('Listening on ' , port) ;}) - D. console.log( 'Listening on ', port) ;
- E. Server.start ();
Answer: C
NEW QUESTION # 131
A developer wants to create an object from a function in the browser using the code below.
What happens due to the lack of the mm keyword on line 02?
- A. window.name is assigned to 'hello' and the variable = remains undefined.
- B. window.m Is assigned the correct object.
- C. The m variable is assigned the correct object.
- D. The m variable is assigned the correct object but this.name remains undefined.
Answer: A
NEW QUESTION # 132
A developer is setting up a new Node.js server with a client library that is built using events and callbacks.
The library:
● Will establish a web socket connection and handle receipt of messages to the server
● Will be imported with require, and made available with a variable called we.
The developer also wants to add error logging if a connection fails.
Given this info, which code segment shows the correct way to set up a client with two events that listen at execution time?
- A. ws.on ('connect', ( ) => {
console.log('connected to client'); ws.on('error', (error) => { console.log('ERROR' , error); });
}); - B. ws.connect (( ) => {
console.log('connected to client'); }).catch((error) => { console.log('ERROR' , error); }}; - C. try{
ws.connect (( ) => {
console.log('connected to client'); }); - D. ws.on ('connect', ( ) => { console.log('connected to client'); }}; ws.on('error', (error) => { console.log('ERROR' , error); }};
Answer: D
Explanation:
} catch(error) { console.log('ERROR' , error); };
}
NEW QUESTION # 133
Given the code below:
const delay = sync delay => {
Return new Promise((resolve, reject) => {
setTimeout (resolve, delay);});};
const callDelay =async () =>{
const yup =await delay(1000);
console.log(1);
What is logged to the console?
- A. 2 1 3
- B. 1 3 2
- C. 1 2 3
- D. 2 3 1
Answer: D
NEW QUESTION # 134
A developer is working on an ecommerce website where the delivery date is dynamically
calculated based on the current day. The code line below is responsible for this calculation.
Const deliveryDate = new Date ();
Due to changes in the business requirements, the delivery date must now be today's
date + 9 days.
Which code meets this new requirement?
- A. deliveryDate.setDate(( new Date ( )).getDate () +9);
- B. deliveryDate.date = Date.current () + 9;
- C. deliveryDate.date = new Date(+9) ;
- D. deliveryDate.setDate( Date.current () + 9);
Answer: A
NEW QUESTION # 135
Refer to the code below:
Which assertion accurately tests the above code?
- A. Console, assert ( await functionalUnderTest (true) , 'not ok) )
- B. Console, assert ( await functionalUnderTest (true) , 'not ok' )
- C. Console, assert ( await functionalUnderTest (true) , 'ok
- D. Console, assert (functionalUnderTest (true) , 'ok')
Answer: D
NEW QUESTION # 136
Refer to the code below:
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' , '123abc'
- B. 'update', {
Detail ; {
recordId, '123abc
)
) - C. 'update', ( recordId ; 123abc'
) - D. {type ; update ', recordId : '123abc')
Answer: B,C
NEW QUESTION # 137
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' , '123abc'
- B. 'Update' , (
recordId : '123abc'
( - C. { type : 'update', recordId : '123abc' }
- D. 'Update' , {
Details : {
recordId : '123abc'
Answer: B,D
Explanation:
}
}
NEW QUESTION # 138
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