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Some JavaScript interview questions

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I dislike interview questions that probe things that programmers should not normally be doing--like asking what the value of [3] * true is. But here are a few questions that I think are pretty good.

1. What is a after the following?

This just tests understanding of the in operator.

2. What is a after the following?

That's more interesting. What happens with a[-1]?

3. How about

This brings up an interesting fact about array indexes...which should allow the candidate to ace the following:

4. What is a after the following?

Which brings up the depressing reality how hard it is to avoid cruft from the ages.

When all four tires fall off your canoe, how many tiny ads does it take to build a doghouse?
the value of filler advertising in 2020
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