CRT-600 試験問題を無料オンラインアクセス

A developer has an is Dog function that takes one argument cat. They want to schedule the function to run every minute.
What is the correct syntax for scheduling this function?

• A.setInterval(isDog, 60000,'cat');

Refer to code below:
function Person() {
this.firstName = 'John';
}
Person.prototype ={
Job: x => 'Developer'
};
const myFather = new Person();
const result =myFather.firstName + ' ' + myFather.job();
What is the value of the result after line 10 executes?

• A.Error: myFather.job is not a function
• B.Undefined Developer
• C.John undefined
• D.John Developer

myArraym can have one level, two levels, or more levels.
Which statement flattens myArray when it can be arbitrarily nested?

• A.myArray.flat(Infinity);
• B.myArray. join (","). split (",");
• C.[ ] .concat {. . .myArray) ;
• D.myArray. reduce ((prev, curr) => prev.concat(curr) [ ]);

A developer is required to write a function that calculates the sum of elements in an array but is getting undefined every time the code is executed. The developer needs to find what is missing in the code below.
Const sumFunction = arr => {
Return arr.reduce((result, current) => {
//
Result += current;
//
), 10);
);
Which option makes the code work as expected?

• A.Replace line 05 with return result;
• B.Replace line 02 with return arr.map(( result, current) => (
• C.Replace line 03 with if(arr.length == 0 ) ( return 0; )
• D.Replace line 04 with result = result +current;

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

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