5 Must Know Interview Questions for Javascript!

❤️ Support me because corporate sponsors rarely do!

🔥 Need a resume/cover letter? Check out my templates!

👊 Join the community!

My Other Socials🤳

[ajotel]

The tricky question about the first task could be:
"What's the difference between first way (the push() and unshift() solution) and the second way (the spread operators' solution)?", because there is a significant difference. First way mutates the original array, but does not change the reference to it. The second way creates a new array and re-assign an original array, so the new reference is created.
In this particular example it doesn't matter since you're using `var`, but if you'd use `const` instead, then the second way would throw an error and the first would be the right one. ;)

[Whimmery]

Thank you so much! This is exactly the kinda thing we need, you did a fantastic job giving the examples a walk through and explanation!

[zarekivey]

These questions and many other common ones will be so easy to you if you read 'You don't know JS' . As a beginner I feel like these small books are helpful in passing JS interviews

[bigdaveliddle]

As a developing developer, going through shit like this is gold. It really helps form a better understanding on how it all works together. Thanks for putting the time into making these videos.

[America]

At 7:05, you mentioned that the "num++" line in "inner" could not access the "num" variable that was defined in "outer" which I believe is incorrect. Variables can be accessed within a function scope that exists inside of another function scope that has made that variable accessible. By removing the line "var num=3", you'll see the console still outputs 3. Please correct me if I'm misinterpreting any of this.

[jackvial]

I had a few questions like this in a first stage coding interview but the phone interview after was much more difficult. Some of the challenging ones were: explain the JS event loop, explain Promises, explain observables and event streams.

[TheRealJameezi]

This was very helpful. Please do more of these!

[haopeiyang]

The selection of the last question is good. Looking forward to more videos like this.

[fishplantfish]

I think num++ actually refers to the innermost num (num = 3), which is hoisted to the top of the inner scope before it has been defined, so we get undefined++, which evaluates to NaN. You can erase the 'var num = 2' and everything will still run the same.
BUT, if you change the 'var' to 'let' as in 'let num = 3;' then the hoisting doesn't happen and you will instead get an error -> avoiding hidden bugs.
Another good reason to use let!

[SouthSideChiTown]

Hey Josh, even though your metrics might say I'm not watching your whole video, I Do download most of them and watch them on my phone as I'm working. Just wanted to let you know your content is appreciated and I really admire the amount of effort you put into your Channel.

[nic_jaws]

Really good, please continue with this kind of junior interviews stuff. Thanks

[sagenoise]

Thank you so much for this bro, this is EXACTLY what we need.

[Holden_P]

This was very helpful, short and sweet!

[thtamtran]

Thank you for your sharing! I'd love to learn more from your expearience. 😊

[philmyglass]

Cool vid man, thanks! I'm currently self-learning JS and videos like this help with confidence. The ES6 way of push and unshifting elements to an array was something I didn't know, so thanks for that!

[busyrand]

Nice! Very helpful. Fantastic effects on your eyes.

[jthomasaurus]

Wow, this video was surprisingly helpful for me. I didn’t expect it, but every question shown either reinforced something I’ve learned, or taught me something new or that I should have already known. Thanks Josh!

[Cyrigar]

Josh, I know you don't really "do" development anymore, but this really helped me grasp closures finally. Thank you.

[kretzsche]

please create more videos like this one! keep up the good work bro!

[thewted]

Joshua! please please more videos like this. This both let us learn or recap with actual possible interview questions.