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NEW QUESTION 52
A developer creates an object where its properties should be immutable and prevent
properties from being added or modified.
Which method should be used to execute this business requirement ?

A. Object.freeze()B. Object.lock()C. Object.eval()D. Object.const()

Answer: A

 

NEW QUESTION 53
Which three options show valid methods for creating a fat arrow function?
Choose 3 answers

A. [ ] => ( console.log(' executed ') ;)B. x => ( console.log(' executed ') ; )C. ( ) => ( console.log(' executed ') ;)D. X,y,z => ( console.log(' executed ') ;)E. (x,y,z) => ( console.log(' executed ') ;)

Answer: B,E

 

NEW QUESTION 54
A developer is wondering whether to use, Promise.then or Promise.catch, especially when a Promise throws an error?
Which two promises are rejected?
Which 2 are correct?

A. Promise.reject('cool error here').then(error => console.error(error));B. Promise.reject('cool error here').catch(error => console.error(error));C. New Promise((resolve, reject) => (throw 'cool error here'}).catch(error => console.error(error)) ;D. New Promise(() => (throw 'cool error here'}).then(null, error => console.error(error)));

Answer: B,C

 

NEW QUESTION 55
......

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