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NEW QUESTION 54
developer creates a new web server that uses Node.js. It imports a server library that uses events and callbacks for handling server functionality.
The server library is imported with require and is made available to the code by a variable named server. The developer wants to log any issues that the server has while booting up.
Given the code and the information the developer has, which code logs an error at boost with an event?

• A. Try{
  server.start();
  } catch(error) {
• B. Server.catch ((server) => {
  console.log('ERROR', error);
  });
• C. Server.error ((server) => {
  console.log('ERROR', error);
  });
• D. Server.on ('error', (error) => {
  console.log('ERROR', error);
  });

Answer: D

Explanation:
console.log('ERROR', error);
}

NEW QUESTION 55
Refer to the code declarations below:

Which three expressions return the string JavaScript?
Choose 3 answers

• A. Concat (str1, str2);
• B. Str1.concat (str2);
• C. $(str1) $ (str2} ';
• D. Str1 + str2;
• E. Str1.join (str2);

Answer: B,C,D

NEW QUESTION 56
Refer to 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 or rejected
• B. When resolved and settled
• C. WHen resolved
• D. When rejected

Answer: A

NEW QUESTION 57
Refer to the code below:

What value can a developer expect when referencing o,js,secondCity?

• A. 'New York
• B. An error
• C. Undefined
• D. 'new york'

Answer: D

NEW QUESTION 58
Which statement can a developer apply to increment the browser's navigation history without a page refresh?
Which statement can a developer apply to increment the browser's navigation history without a page refresh?

• A. window.history.pushState(newStateObject);
• B. window.history.state.push(newStateObject);
• C. window.history.pushStare(newStateObject, ' ', null);
• D. window.history.replaceState(newStateObject,' ', null);

Answer: D

NEW QUESTION 59
......