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NEW QUESTION 47
Refer to the code below:
Const pi = 3.1415326,
What is the data type of pi?

  • A. Decimal
  • B. Number
  • C. Double
  • D. Float

Answer: B

 

NEW QUESTION 48
Given the requirement to refactor the code above to JavaScript class format, which class definition is correct?

  • A.
  • B.
  • C.
  • D.

Answer: C

 

NEW QUESTION 49
Refer to the code below:

A developer import a library that creates a web server. the imported library uses events and callback to start the server.
Which code should be inserted at line 03 to set up an event and start the web server?

  • A. Server. on (‘connet’ , (port) => (
    Console.log (Listening on’ port);
    }};
  • B. server( );
  • C. Server .start();
  • D. server ( (port) => (
    Console.log (‘Listening on’ , port) ;
    }};

Answer: D

 

NEW QUESTION 50
A developer is wondering whether to use, promise, then or provise, catch especially when a promise throws an error.
Which two promises are rejected? Choose 2 answers

  • A. New Promise((resolve, reject) => ( throw ‘Cool error here’)) .catch (error => console (error ));
  • B. New promise (() => (throw ‘Cool error here ‘)) , then ((null, error => console, (error)));
  • C. Promise , reject (‘Cool error here ‘) , catch (error => console ,error (error));
  • D. Promise, rejected (Cool error here’), then (error => console (error ));

Answer: A,B

 

NEW QUESTION 51
Refer to the following array:
Let arr = [1, 2, 3, 4, 5];
Which three options result in x evaluating as [1, 2]?
Choose 3 answer

  • A. let x = arr. slice (0, 2);
  • B. let x =arr.splice(0, 2);
  • C. let x arr.filter((a) => (return a <= 2 });
  • D. let x = arr. slice (2);
  • E. let x = arr.filter ((a) => 2 }) ;

Answer: A,B,C

 

NEW QUESTION 52
……

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