Salesforce CRT-600 問題集

質問 1：
Which option is a core Node,js module?
A. Ios
B. Path
C. Memory
D. locate
正解：B

質問 2：
Refer to the following code:

Which two statement could be inserted at line 17 to enable the function call on line 18?
Choose 2 answers
A. leo.roar = () => { console.log('They\'re pretty good!'); );
B. Object.assign (leo. Tiger);
C. leo.prototype.roar = ( ) =>( console.log('They\'re pretty good!'); };
D. Object.assign (leo, tony);
正解：A,D

質問 3：
Which two console logs outputs NaN ?
Choose 2 answers
A. console.log(10/0);
B. console.log(parseInt('two'));
C. console.log(10/ ''five);
D. console.log(10/ Number('5'));
正解：B,C

質問 4：
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. John Developer
B. Error: myFather.job is not a function
C. John undefined
D. Undefined Developer
正解：A

質問 5：
GIven a value, which three options can a developer use to detect if the value is NaN?
Choose 3 answers !
A. Number.isNaN(value)
B. value === Number.NaN
C. Object.is(value, NaN)
D. value ! == value
E. value == NaN
正解：A,E

質問 6：
Refer to the code below:
Const pi = 3.1415326,
What is the data type of pi?
A. Double
B. Number
C. Float
D. Decimal
正解：B