Online Access Free CRT-600 Exam Questions

No.# D is correct

No.# Answer should be C
Ref: https://developer.salesforce.com/docs/atlas.en-us.apexcode.meta/apexcode/langCon_apex_primitives.htm

No.# It is actually D, tested on the console as well. By priority, the first logCounter() prints 0, then setTimeout has a timer of 2100 which is greater than the setInterval, so we move to setInterval and the counter gets updated and now holds the value 1, logCounter within setInterval prints 1, then considering that it is not yet the time for setTimeout to be executed, the counter gets updated again within setInterval and 2 is printed, right after this the setTimeout timer ends so 2 gets printed again as that is the current value of the counter.

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No.# Lenka did you even try to run this code in the console?
The answer is undefined values!

No.# document.querySelector('#main li:nth-child(2)').innerHTML = ' Mr. T. ';

No.# setCurrentUrl();
console.log('The current URL is: ' + url);
function setCurrentUrl() {
url = window.location.href;
}

No.# Why not A and C?

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No.# Can someone explain why not D?

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No.# ABE is correct

No.# The three options that a developer can use to detect if a value is NaN are:

B. Number.isNaN(value)
D. value !== value
E. Object.is(value, NaN)

Explanation:

A. value === Number.NaN: This comparison will not work for detecting NaN. In JavaScript, NaN is not equal to any other value, including itself, so this condition will be false for any value, including NaN.

B. Number.isNaN(value): This is the correct method to detect NaN in JavaScript. It returns true if the provided value is NaN and false otherwise.

C. value == NaN: The equality comparison with NaN will not work correctly because NaN is considered unequal to any value, including itself. Therefore, this condition will not reliably detect NaN.

D. value !== value: This is another way to detect NaN. In JavaScript, NaN is the only value that is not equal to itself. So, this condition will be true if value is NaN and false otherwise.

E. Object.is(value, NaN): This is also a correct way to detect NaN. Object.is() behaves similarly to the strict equality (===) operator, but it returns true when comparing NaN to NaN.

So, the three correct options are B, D, and E....

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No.# Correct answer: A,C

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No.# B is correct.

console.log(0);
setTimeout(() => {
console.log(1);
});
console.log(2);
setTimeout(() => {
console.log(3);
}, 0);
console.log(4);

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1
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