JavaScript-Developer-I Free Practice Test

Refer to the code snippet below:
Let array = [1, 2, 3, 4,4, 5, 4, 4];
For (let i =0; i < array xss=removed>array.splice(i, 1);
}
}

What is the value of the array after the code executes?

1. A. [1, 2, 3, 4, 5, 4, 4]
2. B. [1, 2, 3, 4, 4, 5, 4]
3. C. [1, 2, 3, 4, 5, 4]
4. D. [1, 2, 3, 5]

Correct Answer: C

developer uses the code below to format a date.

After executing, what is the value offormattedDate?

1. A. May 10, 2020
2. B. June 10, 2020
3. C. October 05, 2020
4. D. November 05, 2020

Correct Answer: A

Refer to the code below: Let textValue = ’1984’;
Which code assignment shows a correct way to convert this string to an integer?

1. A. let numberValue = Number(textValue);
2. B. Let numberValue = (Number)textValue;
3. C. Let numberValue = textValue.toInteger();
4. D. Let numberValue = Integer(textValue);

Correct Answer: A

The developer wants to test this code:
Const toNumber =(strOrNum) => strOrNum; Which two tests are most accurate for this code? Choose 2 answers

1. A. console.assert(toNumber(‘2’) ===2);
2. B. console.assert(Number.isNaN(toNumber()));
3. C. console.assert(toNumber(‘-3’) < 0>console.assert(toNumber () === NaN);

Correct Answer: AC

Refer to the following code:

What is the output line 11?

1. A. [1,2]
2. B. [“bar”,”foo”]
3. C. [“foo”,”bar”]
4. D. [“foo:1”,”bar:2”]

Correct Answer: C