Design an addressing scheme, using VLSM? - networking

If this has been asked before then I'm sorry.
I've been given this question and have been trying all weekend to figure it out. I've looked at multiple websites but none of them explain the process. It's really frustrating me. Can anyone help? So I've been given the first two pictures below. I'm just hoping someone could maybe explain this to me? I need to practice this for my exam!

Related

What is an Internal Pointer Variable?

I know what pointers are but I don't know what internal pointer variables are. Does anyone know what they are? I came across this concept from a meme that is quite popular right now. I can't find a decent explanation online anywhere.
You can figure out by watching the original video https://www.youtube.com/watch?v=Ranc3VvjI88
p.s. check 9:25 min =)

Display individual results to study participants after completing survey

I am trying to find a way to display individual results of a questionnaire after the survey to the participants. I have looked at stackexchange and googled quite a bit but it seems that I am not formulating my question correctly, as I have not found any helpful information.
Could anybody here point me to the right direction on how to figure this out?
Thank you so much,
Noemi
I tried to find information on how to even start doing this, but was not successful so far. I am probably not using the correct keywords to search. Any hints on that would already be amazing!

best way to replicate a tree structure in firebase?

This is kind of a weird and perhaps dumb question but regardless some clarification is appreciated. I'm trying to implement a tree-like structure in firebase but don't really know the best method to do so.
The best solution that I have come up with is nested maps but I feel like this is a pretty shitty one. Heres a screenshot to show you what I did:
this is trying to replicate the following:
Feel like there's gotta be a better method than this, if anyone has experience with a similar situation please guide me!

How does the result of this basic arithmetic calculation turns out like this?

Pardon my newbie level question, but i've been wondering and also recounting to see why the result turns out to be like that?
I understand why the first row results in like that but the rest remain a mystery to me. I've been using calculator to help and also review some basics on hexadecimal arithmetic but i'm still lost. If anyone could please explain why the result became like that it'll be appreciated.
Thanks.
Question

How much Work-power and time does it take for building website like stackoverflow?

I'm wondering building a website like StackOverFlow (approximately the same features using ASP.NET ) How much Work-power and time does it take in your opinion .
My boss has asked me to estimate for work-power , time , cost and suitable technologies .
I appreciate any direction .
I believe that the site would take plenty of time to implement. If I'd have to pull a guess of thin air I'd say somewhere between 800-1200 man hours.
Then comes the setting up servers, ensuring scalability, testing, fine-tuning algorithms.
So depending on how good you or your team is it could take anywhere up to a year to write something like this.
Disclaimer: I am just talking based on 10 years of experience with web-development. But I could be COMPLETELY wrong.
Buddy, there is a website similar to this called http://startups.com
You can probably ask this question there. Its specifically designed to answer questions like this. Whereas stackoverflow is intended for programmers and programming related questions. I see this question being asked here a bit isolated.
People come to this site and think wow stackoverflow this is an easy site to create.
I mean all it is is post a question then people submit an answer. I think that is a big misconception. Maybe just maybe the database is quite simple, a question has multiple answers and an answer has multiple comments associate with it. If you dig deep into it the questions and answers could actually be stored in the same table...with some indicator as to whether it is a question or an answer. But to answer your question, I don't think it is as simple as one might think. It's definitely not difficult in the logical sense (it's doable). What I am saying is it is more then a one week job :).
it is not that hard to do the site. the design is nice but simple. the engine isint THAT complicated (or so it looks). biggest problem is the load that falls on this site and the hard task of moderating/maintaining it. and the best part of it is the idea ;)
I think that the diffuclt of stackoverflow is to get community (very good quality community, not like yahoo answers).
Not only that, also use cases from stack overflow are pretty cool and adapt very well to get a good community.
About work-power a good skilled programmer could start it, if at full time like a month or less could do it. BUT! the programmer should have the idea,not a freelance or something like that, freelance or slave monkey coder could take a more time to do it.
But there are more problems, like money to invest at very begin of the app for example in hosting / server power costs.
Also stack overflow, could be compared to forums...its like a forum evoled or something similar.
Someone said that requires a lot of work power, I disagree if you start something to get the best scability,etcs (like project of big scale) you are going to death of that project.
Start something simple, very simple when there are scability problems start with that but no at begin!
Probably longer than you expect:
Code: It's Trivial (by Jeff Atwood)

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