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下載Salesforce Certified JavaScript Developer I Exam考試題庫
NEW QUESTION 42
Refer to the code below:
Line 05 causes an error.
What are the values of greeting and salutation once code completes?
- A. Greeting is Hello and salutation is I say hello.
- B. Greeting is Goodbye and salutation is I say Hello.
- C. Greeting is Hello and salutation is Hello, Hello.
- D. Greeting is Goodbye and salutation is Hello, Hello.
Answer: C
NEW QUESTION 43
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. try{
ws.connect (( ) => {
console.log('connected to client'); });
} catch(error) { console.log('ERROR' , error); };
} - B. ws.on ('connect', ( ) => { console.log('connected to client'); }}; ws.on('error', (error) => { console.log('ERROR' , error); }};
- C. ws.on ('connect', ( ) => {
console.log('connected to client'); ws.on('error', (error) => { console.log('ERROR' , error); });
}); - D. ws.connect (( ) => {
console.log('connected to client'); }).catch((error) => { console.log('ERROR' , error); }};
Answer: B
NEW QUESTION 44
Given the code below:
01 function GameConsole (name) {
02 this.name = name;
03 }
04
05 GameConsole.prototype.load = function(gamename) {
06 console.log( ` $(this.name) is loading a game : $(gamename) ...`);
07 )
08 function Console 16 Bit (name) {
09 GameConsole.call(this, name) ;
10 }
11 Console16bit.prototype = Object.create ( GameConsole.prototype) ;
12 //insert code here
13 console.log( ` $(this.name) is loading a cartridge game : $(gamename) ...`);
14 }
15 const console16bit = new Console16bit(' SNEGeneziz ');
16 console16bit.load(' Super Nonic 3x Force ');
What should a developer insert at line 15 to output the following message using the method ?
> SNEGeneziz is loading a cartridge game: Super Monic 3x Force . . .
- A. Console16bit.prototype.load(gamename) {
- B. Console16bit.prototype.load(gamename) = function() {
- C. Console16bit.prototype.load = function(gamename) {
- D. Console16bit = Object.create(GameConsole.prototype).load = function
(gamename) {
Answer: C
NEW QUESTION 45
......