Question # 1
Refer to the code snippet below:
Let array = [1, 2, 3, 4, 4, 5, 4, 4];
For (let i =0; i < array.length; i++)
if (array[i] === 4) {
array.splice(i, 1);
}
}
What is the value of array after the code executes?
| | A. [1, 2, 3, 4, 5, 4, 4] B. [1, 2, 3, 4, 4, 5, 4]
| | B. [1, 2, 3, 5]
| | C. [1, 2, 3, 4, 5, 4] |
Question # 2
Considering type coercion, what does the following expression evaluate to?
True + ‘13’ + NaN
| | A. ‘ 113Nan ’
| | B. 14
| | C. ‘ true13 ’
| | D. ‘ true13NaN ’ |
Question # 3
A developer has the function, shown below, that is called when a page loads.
function onload() { console.log(“Page has loaded!”);
} Where can the developer see the log statement after loading the page in the browser?
| | A. Terminal running the web server.
| | B. Browser performance toots
| | C. Browser javaScript console
| | D. On the webpage. |
C. Browser javaScript console
Question # 4
Refer to the code below:
Let textValue = ’1984’;
Which code assignment shows a correct way to convert this string to an integer?
| | A. let numberValue = Number(textValue);
| | B. Let numberValue = (Number)textValue;
| | C. Let numberValue = textValue.toInteger();
| | D. Let numberValue = Integer(textValue); |
A. let numberValue = Number(textValue);
Question # 5
Refer to the following code:
Let sampleText = ‘The quick brown fox jumps’;
A developer needs to determine if a certain substring is part of a string.
Which three expressions return true for the given substring ?
Choose 3 answers
| | A. sampleText.includes(‘fox’);
| | B. sampleText.includes(‘ quick ’, 4);
| | C. sampleText.includes(‘ Fox ’, 3)
| | D. sampleText.includes(‘ fox ’);
| | E. sampleText.includes(‘ quick ’) !== -1; |
B. sampleText.includes(‘ quick ’, 4);
D. sampleText.includes(‘ fox ’);
E. sampleText.includes(‘ quick ’) !== -1;
Question # 6
The developer has a function that prints “Hello” to an input name. To test this, thedeveloper created a function that returns “World”. However the following snippet does not print “ Hello
World”.
What can the developer do to change the code to print “Hello World” ?
| | A. Change line 7 to ) () ;
| | B. Change line 2 to console.log(‘Hello’ , name() );
| | C. Change line 9 to sayHello(world) ();
| | D. Change line 5 to function world ( ) { |
B. Change line 2 to console.log(‘Hello’ , name() );
Question # 7
Refer to the code below:
Async funct on functionUnderTest(isOK) {
If (isOK) return ‘OK’ ;
Throw new Error(‘not OK’);
)
Which assertion accuretely tests the above code?
| | A. Console.assert (await functionUnderTest(true), ‘ OK ’)
| | B. Console.assert (await functionUnderTest(true), ‘ not OK ’)
| | C. Console.assert (await functionUnderTest(true), ‘ not OK ’)
| | D. Console.assert (await functionUnderTest(true), ‘OK’) |
D. Console.assert (await functionUnderTest(true), ‘OK’)
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