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NEW QUESTION # 34
A developer wrote the following code:
01 let X = object.value;
02
03 try {
04 handleObjectValue(X);
05 } catch (error) {
06 handleError(error);
07 }
The developer has a getNextValue function to execute after handleObjectValue(), but
does not want to execute getNextValue() if an error occurs.
How can the developer change the code to ensure this behavior?
- A. 03 try {
04 handleObjectValue(x)
05 ........................ - B. 03 try{
04 handleObjectValue(x);
05 } catch(error){
06 handleError(error);
07 } finally {
08 getNextValue();
10 } - C. 03 try{
04 handleObjectValue(x);
05 } catch(error){
06 handleError(error);
07 }
08 getNextValue(); - D. 03 try{
04 handleObjectValue(x);
05 } catch(error){
06 handleError(error);
07 } then {
08 getNextValue();
09 }
Answer: A
NEW QUESTION # 35
Refer to the following code block:
class Animal{
constructor(name){
this.name = name;
}
makeSound(){
console.log(`${this.name} is making a sound.`)
}
}
class Dog extends Animal{
constructor(name){
super(name)
this.name = name;
}
makeSound(){
console.log(`${this.name} is barking.`)
}
}
let myDog = new Dog('Puppy');
myDog.makeSound();
What is the console output?
Answer:
Explanation:
Puppy is barking
NEW QUESTION # 36
Refer to the string below.
Const str='Salesforce';
Which two statements results in the word 'Sales'?
Answer:
Explanation:
See the Answer below in explanation:
Explanation
Str.substring(0,5);
Str.substr(0,5);
NEW QUESTION # 37
Universal containers (UC) just launched a new landing page, but users complain that the website is slow, A developer found some functions that cause this problem, To verify this, the developer decides to execute everything and log the time each of these suspicious function consumes.
Which function can then developer use to obtain the time spent by every one of the three functions?
- A. Console, timestamp
- B. Console.getTime ( )
- C. Console,trace ( )
- D. Console.timeLog ( )
Answer: B
NEW QUESTION # 38
Refer to the code below:
console.log(''start);
Promise.resolve('Success') .then(function(value){
console.log('Success');
});
console.log('End');
What is the output after the code executes successfully?
- A. EndStartSuccess
- B. StartSuccessEnd
- C. SuccessStartEnd
- D. StartEndSuccess
Answer: D
NEW QUESTION # 39
A developer wants to set up a secure web server with Node.js. The developer creates a directory locally called app-server, and the first file is app-server/index.js Without using any third-party libraries, what should the developer add to index.js to create the secure web server?
- A. const https =require('https');
- B. const server =require('secure-server');
- C. const http =require('http');
- D. const tls = require('tls');
Answer: A
NEW QUESTION # 40
Refer to the following array:
Let arr = [ 1,2, 3, 4, 5];
Which three options result in x evaluating as [3, 4, 5] ?
Choose 3 answers.
- A. Let x = arr.slice(2,3);
- B. Let x= arr.filter (( a) => (a<2));
- C. Let x= arr.slice(2);
- D. Let x= arr.filter((a) => ( return a>2 ));
- E. Let x= arr.splice(2,3);
Answer: C,D,E
NEW QUESTION # 41
Refer to the string below:
const str = 'Salesforce';
Which two statements result in the word 'Sales'?
Choose 2 answers
- A. str.substr(1, 5);
- B. str.substr (0, 5);
- C. str.substring (1, 5);
- D. str.substring (0, 5);
Answer: B,D
NEW QUESTION # 42
A developer is asked to fix some bugs reported by users. To do that, the developer adds a breakpoint for debugging.
When the code execution stops at the breakpoint on line 06, which two types of information are available In the browser console? Choose 2 answers
- A. The value of the carSpeed and fourWheel variables
- B. The information stored in the window.localStorage property.
- C. A variable's displaying the number of instances created for the Car object.
- D. The style, event listeners and other attributes applied to the carSpeed DOM element.
Answer: B,D
NEW QUESTION # 43
Referto the code below:
new Promise((resolve, reject) => {
const fraction = Math.random();
if( fraction >0.5) reject("fraction > 0.5, " + fraction);
resolve(fraction);
})
.then(() =>console.log("resolved"))
.catch((error) => console.error(error))
.finally(() =>console.log(" when am I called?"));
When does Promise.finally on line 08 get called?
- A. When resolved and settled
- B. When rejected
- C. When resolved or rejected
- D. When resolved
Answer: C
NEW QUESTION # 44
Refer to following code block:
Let array = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11,];
Let output =0;
For (let num of array){
if (output >0){
Break;
}
if(num % 2 == 0){
Continue;
}
Output +=num;
What is the value of output after the code executes?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: C
NEW QUESTION # 45
Refer to the following code:
Which statement should be added to line 09 for the code to display. The truck 123AB has a weight of 5000 Ib. '?
- A. This .plate = plate;
- B. Super.plate = plate;
- C. Vehicle.plate = plate
- D. Super = (plate ) ;
Answer: A,C,D
NEW QUESTION # 46
In the browser, the window object is often used to assign variables that require the broadcast scope in an application Node is application do not have access to the window object by default.
Which two methods are used to address this? Choose 2 answer
- A. Assign variables to the global object.
- B. Assign variables to module, exports and require them as needed.
- C. Create a new window object in the root file.
- D. Use the document instead of the window object.
Answer: C,D
NEW QUESTION # 47
Refer to the code snippet:
A developer writes this code to return a message to a user attempting to register a new username. If the username is available, a variable named msg is declared and assigned a value on line 03.
What is the return of msg when getivelibilityMessage ('' bewUserName') is executed and getAvailability (''newUserName'') returns false?
- A. ''msg is not defined''
- B. undefined
- C. ''Username available''
- D. ''newUsername''
Answer: B
NEW QUESTION # 48
A developer is trying to convince management that their team will benefit from using Node.JS for a backend server that they are going to create. The server will be a web server that handles API requests from a website that the team has already built using HTML, CSS, and JavaScript.
Which three benefits of Node.js can the developer use to persuade their manager?
Which three benefits of Node.js can the developer use to persuade their manager?
- A. Performs a static analysis can code before execution to look for runtime errors.
- B. Executes server-side JavaScript code to avoid learning a new language.
- C. Ensure stability with one major release every few years.
- D. Installs with its own package manager to install and manage third-party libraries.
- E. Uses non-blocking functionality for performant request handling
Answer: A
NEW QUESTION # 49
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 theserver 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'); });} catch(error) { console.log('ERROR',error); };}
- D. ws.on ('connect', ( ) => {console.log('connected to client'); ws.on('error', (error) => { console.log('ERROR' ,error); });});
Answer: D
NEW QUESTION # 50
Given the code below:
Which method can be used to provide a visual representation of the list of users and to allow sorting by the name or email attribute?
- A. console.groupCol lapsed (usersList) ;
- B. console.group(usersList) ;
- C. console.table(usersList) ;
- D. console.info(usersList) ;
Answer: B
NEW QUESTION # 51
A developer wants to use a module called DataPrettyPrint. This module exports one default functioncalled printDate ().
How can a developer import and use the printDate() function?
- A.
- B.
- C.
- D.
Answer: A
NEW QUESTION # 52
Given the following code:
What is the output of line 02?
- A. "x-
- B. 'object"
- C. "undefined" 0
- D. "null"
Answer: B
NEW QUESTION # 53
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