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I recently gave an interview in a software company, and was rejected cause I took half a minute to connect my webcam and turn on my video 🤷.
I had just moved into an apartment at that time, so my place was not well managed. I attended the meeting in time but didn't have my webcam turned on. They asked me and it just took half a minute for me to turn on and start the meeting. Everything went well there, and they asked me to complete their coding challenge which was a development task. It was a huge task where I had to build a full-stack app (frontend + backend) with basic crud and auth features. I completed that in 2 days and presented it to their tech lead. He loved my work, he was impressed that I was able to complete their challenge in such a short time.
They said they will get back, and after a few weeks, they said that I was rejected. I reached out to ask for constructive feedback on why I was rejected and they said:
“Communication during the interview - interview
preparation: the video wasn't available at the start and needed to check the headset at the start of the meeting” 🙈7 -
Hardcore loli porn.
Just kiddig. Video games and math study. I believe that the most elegant solutions come in the form of math and the challenge they impose as well as the satisfaction of getting the correct result (or the estimate for it) are comparable to running a succesfull application.11 -
That feel when my solution runs way faster than world average
PS: the puzzle is SAWAYAMA WONDERDISC
3 -
Hi my dev friends... I have applied for Microsoft Student Partner, and need your support. I have uploaded a Video for the 1-minute Video challenge, and need good stats on that. Please watch the video and if you like it, feel free to hit the like button and Comment... (That will be awesome)
https://youtube.com/watch/...
P.S. - Every step counts...6 -
Ok now I'm gonna tell you about my "Databases 2" exam. This is gonna be long.
I'd like to know if DB designers actually have this workflow. I'm gonna "challenge" the reader, but I'm not playing smartass. The mistakes I point out here are MY mistakes.
So, in my uni there's this course, "Databases 2" ("Databases 1" is relational algebra and theoretical stuff), which consist in one exercise: design a SQL database.
We get the description of a system. Almost a two pages pdf. Of course it could be anything. Here I'm going to pretend the project is a YouTube clone (it's one of the practice exercises).
We start designing a ER diagram that describes the system. It must be fucking accurate: e.g. if we describe a "view" as a relationship between the entities User and Video, it MUST have at least another attribute, e.g. the datetime, even if the description doesn't say it. The official reason?
"The ER relationship describes a set of couples. You can not have two elements equal, thus if you don't put any attribute, it means that any user could watch a video only once. So you must put at least something else."
Do you get my point? In this phase we're not even talking about a "database", this is an analysis phase.
Then we describe the type dictionary. So far so good, we just have to specify the type of any attribute.
And now... Constraints.
Oh my god the constraints. We have to describe every fucking constraint of our system. In FIRST ORDER LOGIC. Every entity is a set, and Entity(e) means that an element e belongs to the set Entity. "A user must leave a feedback after he saw a video" becomes like
For all u,v,dv,df,f ( User(u) and Video(v) and View(u, v, dv) and feedback(u, v, f) ) ---> dv < df
provided that dv and df are the datetimes of the view and the feedback creation (it is clear in the exercise, here seems kinda cryptic)
Of course only some of the constraints are explicitly described. This one, for example, was not in the text. If you fail to mention any "hidden" constraint, you lose a lot of points. Same thing if you not describe it correctly.
Now it's time for use cases.
You start with the usual stickman diagram. So far so good.
Then you have to describe their main functions.
In first order logic. Yes.
So, if you got the point, you may think that the following is correct to get "the average amount of feedback values on a single video" (1 to 5, like the old YT).
(let's say that feedback is a relationship with attribute between User and Video
getAv(Video v): int
Let be F = { va | feedback(v, u, va) } for any User u
Let av = (sum forall f in F) / | F |
return av
But nope, there's an error here. Can you spot it (I didn't)?
F is a set. Sets do not have duplicates! So, the F set will lose some feedback values! I can not define that as a simple set!
It has to be a set of couples, like (v, u), where v is the value and u the user; this way we can have duplicate feedback values in our set.
This concludes the analysis phase. Now, the design.
Well we just refactor everything we have done until now. Is-a relations become relationships, many-to-many relationships get an "association entity" between them, nothing new.
We write down on paper every SQL statement to build any table, entity or not. We write down every possible primary key or foreign key. The constraint that are not natively satisfied by SQL and/or foreign keys become triggers, and so on.
This exam is considered the true nightmare at our department. I just love it.
Now my question is, do actually DB designers follow this workflow? Or is this just a bloody hard training in Pai Mei style?6 -
Basically everything. Let me explain.
It's now.. okay what time is it? Ooh there's some dust on the clock, I wonder how do they form.. I guess I'll check Wikipedia. Page is loading, might as well scroll fb while waiting. Ooh a video on the home feed! Oh wait it's loading, I wonder what's on YouTube. Ugh, ads, let's just mute it and scroll devRant. Oh cool there's something called Google FooBar challenge, imma try searching Arraylist Java. Nice, lv1 done, let's take a break by getting a drink from the fridge.
*Walks back to room after drinking a sip of orange juice* hmm.. what time is it? Oh it's late, imma go to sleep!
*Shuts down everything and goes to bed* Maybe I'll just browse devRant before sleeping.. Ooh I have an idea for wk51!1 -
During one of our visits at Konza City, Machakos county in Kenya, my team and I encountered a big problem accessing to viable water. Most times we enquired for water, we were handed a bottle of bought water. This for a day or few days would be affordable for some, but for a lifetime of a middle income person, it will be way too much expensive. Of ten people we encountered 8 complained of a proper mechanism to access to viable water. This to us was a very demanding problem, that needed to be sorted out immediately. Majority of the people were unable to conduct income generating activities such as farming because of the nature of the kind of water and its scarcity as well.
Such a scenario demands for an immediate way to solve this problem. Various ways have been put into practice to ensure sustainability of water conservation and management. However most of them have been futile on the aspect of sustainability. As part of our research we also considered to check out of the formal mechanisms put in place to ensure proper acquisition of water, and one of them we saw was tree planting, which was not sustainable at all, also some few piped water was being transported very long distances from the destinations, this however did not solve the immediate needs of the people.We found out that the area has a large body mass of salty water which was not viable for them to conduct any constructive activity. This was hint enough to help us find a way to curb this demanding challenge. Presence of salty water was the first step of our solution.
SOLUTION
We came up with an IOT based system to help curb this problem. Our system entails purification of the salty water through electrolysis, the device is places at an area where the body mass of water is located, it drills for a suitable depth and allow the salty water to flow into it. Various sets of tanks and valves are situated next to it, these tanks acts as to contain the salty water temporarily. A high power source is then connected to each tank, this enable the separation of Chlorine ions from Hydrogen Ions by electrolysis through electrolysis, salt is then separated and allowed to flow from the lower chamber of the tanks, allowing clean water to from to the preceding tanks, the preceding tanks contains various chemicals to remove any remaining impurities. The whole entire process is managed by the action of sensors. Water alkalinity, turbidity and ph are monitored and relayed onto a mobile phone, this then follows a predictive analysis of the data history stored then makes up a decision to increase flow of water in the valves or to decrease its flow. This being a hot prone area, we opted to maximize harnessing of power through solar power, this power availability is almost perfect to provide us with at least 440V constant supply to facilitate faster electrolysis of the salty water.
Being a drought prone area, it was key that the outlet water should be cold and comfortable for consumers to use, so we also coupled our output chamber with cooling tanks, these tanks are managed via our mobile application, the information relayed from it in terms of temperature and humidity are sent to it. This information is key in helping us produce water at optimum states, enabling us to fully manage supply and input of the water from the water bodies.
By the use of natural language processing, we are able to automatically control flow and feeing of the valves to and fro using Voice, one could say “The output water is too hot”, and the system would respond by increasing the speed of the fans and making the tanks provide very cold water. Additional to this system, we have prepared short video tutorials and documents enlighting people on how to conserve water and maintain the optimum state of the green economy.
IBM/OPEN SOURCE TECHNOLOGIES
For a start, we have implemented our project using esp8266 microcontrollers, sensors, transducers and low payload containers to demonstrate our project. Previously we have used Google’s firebase cloud platform to ensure realtimeness of data to-and-fro relay to the mobile. This has proven workable for most cases, whether on a small scale or large scale, however we meet challenges such as change in the fingerprint keys that renders our device not workable, we intend to overcome this problem by moving to IBM bluemix platform.
We use C++ Programming language for our microcontrollers and sensor communication, in some cases we use Python programming language to process neuro-networks for our microcontrollers.
Any feedback conserning this project please?
8 -
When you are asked to test the whole website and you found a pop-up so deep after a series of conditions that it show a video of Homer Simpsons doing the ice bucket challenge
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Fuck you fucking Amazon Video!
Wanted to watch the second part of the Mr. Robot series finale, but Amazon Germany has only the first available.
Both parts aired yesterday evening on USA Today, so I'm ANGRY!
Luckily, there are other ways, so maybe it was a little "Hacker-Challenge"...
But still, with all episodes they could have flunked it has to be the finale!3 -
{TL:DR/ a super non web dev non frontend non interested person aka me somehow cracked the interview(through wrong practices i guess) landed into an internship that would have gone to a better person.I cracked the interview but am shit scared if i could stand the job}
- So 3 days ago i was talking to my friend regarding random stuff, when he told about needing a front end dev for making static template based html pages for their company.
- (I haven't ever worked in deep with web dev, just generated a few websites using mardown to html convertors, and was recently trying to learn flask/bootstrap/js) I was in need of some work so immediately requested him to talk about me in their company.
- yesterday i get an interview call from the hr of that company . She ask what i know, what they want and if i could do. I honestly tell them about my experience with web dev( with some maybe's)
- moments later , she adds me to a group with another guy, and gives us both a task to use create a clone of same website in 2 days.
- The website is a super graphically designed web page with lots of animations, custom mouses and what not. I could sense the basic elements out of it , like the nav bar and the carousals, but those animations were way beyond my knowledge. yet i start working on it
- I try with taking the clever top down approach of cloning the website and fixing its structure. It has such long code files of 10k+ lines, but i was still able to clean the css and html files and some of js code to make the website work
- later my friend calls and tells me that the other guy is a 1st year student / his brother and he doesn't know much stuff so he's kinda like me.
- He shows me a video of his code that he sent to him. That guy took the honest, bottom up approach, used the design as inspiration and was trying hard to create the similar design and animations via js.
- among other things, he also tells me that this challenge is super difficult and the level of difficulty in the work is certainly going to be lesser than this.
- In my task, I was super stuck at js because i haven't learned it much, therefore after spending 1.5 days, i made a submission without the main thing, i.e one particular carousal working
- later I get a call from another friend (B) of mine and while discussing random things, i show him my code over anydesk and ask him if he could somehow get my code to work. He asks for some time and sends me a complete refactored version of code with the same design but fully working carousal and other stuff.
- meanwhile i get to see the other guy's code and he had legit made all the designs and functions by himself, but his code looked less polished and different from the design.
- I pushed my friend(B)'s refactored version and added a comment on the group the carousal in mu code is now working.
- later at night my friend1 calls and tells me that their company was considering my submission and i would be getting the selection call
- I feel like a crazy fraud who somehow cracked the interview but is going to get his ass whipped. Where and how can i learn js, and jquery?5 -
I keep having this recurring idea that I can fill in the gaps in my education by writing video games that allow me to explore those topics. This would force me to learn the subject well enough to share it with other people. So it would not be just surface level.
I keep thinking of a program that explores and visualizes math topics and programming topics. I would really like to have a program that allows me to visualize memory cells for algorithm exploration. Or a really nice graphing calculator in the computer that allows me to view multiple graphs to compare and contrast equations.
What holds me back is both math and CS are huge topics. I feel like any kind of playground would only cover a small subset. Ideally whatever I make should be extendable over time to add content and topics. It would need to be somewhat fun as well.
I can imagine an AI training program where you help your character navigate a room of hazards or die. This could be one such fun challenge.1
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