Kahoot quiz: JavaScript revision 30 May 2019

kahoots_js_revision_30_05_2019.md

What keyword can we use to raise an error in JavaScript?

1. catch
2. try
3. throw
4. error

ANSWER: 3

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What block statement can we use to run code no matter if a try / catch raises an error or not?

1. try
2. finally
3. catch
4. else

ANSWER: 2

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“1” !== 1 what does this expression evaluate to?

1. TRUE
2. FALSE
3. undefined
4. null

ANSWER: 1

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What keyword can we use if we want to exit a loop without finishing the rest of it’s iterations?

1. break
2. continue
3. next
4. exit

ANSWER: 1

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let num = -1 || “one" ; what will num be?

1. “one"
2. undefined
3. null
4. -1

ANSWER: 4

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“1” != 1

1. TRUE
2. FALSE
3. undefined
4. null

ANSWER: 2

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let num = 0 || “one"

1. “one"
2. undefined
3. null
4. 0

ANSWER: 1

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What method can we use in a promise to say it was successful?

1. return
2. resolve
3. reject
4. success

ANSWER: 2

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What method can we use in a promise to say it was unsuccessful?

1. error
2. return
3. reject
4. catch

ANSWER: 3

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null || "one"

1. "one"
2. FALSE
3. undefined
4. null

ANSWER: 1

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References:

1. https://developer.mozilla.org/en-US/docs/Glossary/Falsy
2. https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Promise