This video is about the Inmemory db or realtime db or Main memory databases, its importance, performance characteristics, design and use cases.
In SSMS, we many of may noticed System Databases under the Database Folder. But how many of us knows its purpose?. In this article lets discuss about the System Databases in SQL Server.
Fig. 1 System Databases
There are five system databases, these databases are created while installing SQL Server.
#sql server #master system database #model system database #msdb system database #sql server system databases #ssms #system database #system databases in sql server #tempdb system database
That dreaded system design interview. I remember the first system design question I was asked. “Design WhatsApp”, he said. I didn’t know where to start! I was a fresher. Data structures and algorithms were the only things I knew. I am sure you can guess how that interview went. Then after enough research, I made myself a checklist of components, of sorts, to navigate me through my next system design interviews. And I sh*t you not, it works!
So I’ll stop with the chit-chat and get right into it!
First things first, how are the users interacting with your system? Is it via a mobile app or on a laptop or a smart TV? This gives us an indication of what kinds of limitations and hidden requirements we are dealing with. For example, in the case of a mobile user, we might have to handle fluctuating networks, for a smart TV and laptop users kind of a scenario we might have to support different file formats and different resolutions and aspect ratios.
#database #distributed-systems #system-design #software-engineering-interview #interview-tips #interview-prep #devops #software-architecture
Imagine — You’re in a system design interview and need to pick a database to store, let’s say, order-related data in an e-commerce system. Your data is structured and needs to be consistent, but your query pattern doesn’t match with a standard relational DB’s. You need your transactions to be isolated, and atomic and all things ACID… But OMG it needs to scale infinitely like Cassandra!! So how would you decide what storage solution to choose? Well, let’s see!
First of all, what kind of data are we working with? Is it records or file systems or audio/video content? And what kind of processing do we intend to do on that data? Do we need to search for something or run sophisticated analytics algorithms?
#database #distributed-systems #system-design #nosql #interview-prep #coding-interview #databases #data-science
The system design interview provides the key signals that differentiate a tech lead from programmers. Here’s some tips may help you ace it.
Image from Quora
When preparing, thinking about how to design a system that top-tier tech companies have(Google, Twitter, Amazon, Uber, etc).
Proactively picking some classic questions, like Twitter Feeds, Snapchat messaging, Dropbox file system, to exercise. Over-preparing and ensure you are familiar with these major scenarios.
“Drive the discussion from the beginning.”
After the interviewer throwing out the question, like “Design a Load Balancer for Twitter”.
Do NOT rush to the solution.
The very first thing you need to do is to get clarity about the system’s requirements and constraints:
In reality, the quality of these exploring questions reflects the candidate’s experience level.
Now that you have the clarity of the system’s requirements, continue to drive the discussion.
The next step is to write down the first version of a complete solution.
On a high level, a reasonable solution should include all the components that receive, process, and store the data. Specifically, we need to write down:
Then validate this solution with the interviewer, ensure the it satisfy the key business requirements. Sometimes it also involves a bit calculation to persuade the interviewer.
After having the 1st version solution nailed, the interview will usually go into the “Deep Dive” section. The interviewer will come up with a special requirement, and ask the candidate to adjust their design to ensure its system survive in this scenario.
There’s no one-fits-all answer at this stage. The interviewer really needs to leverage his/her experience and resolve it.
However, there’s one thing each candidate should keep in mind.
“Think in trade-offs”.
No matter what solution you propose, always write down its pros and cons. What makes it work and what to sacrifice to meet this goal. That’s the key signal of an experienced engineer.
Unlike the coding interview, there’re hundreds of ways a system design interview could go. But no matter what scenarios you’re in, I wish tips mentioned above could help you navigate to the ideal destination.
#software-development #system-design-project #system-design-interview #interview
In this article, I share what I think is one of the best tips when it comes to design interviews.
As a junior UX designer, I’ve been asked a few times by my peers: what is the most essential UX interview tip I have?
Well, to this question I have a very simple answer,** just be honest**… well, this might sound like a no brainer, but it seems to me that not many junior designers know about it or want to apply it.
I had the chance to speak with a few designers and I discovered that some tend towards being a little bit insincere when going through interviews for design positions. It’s normal to be intimidated when going through an interview process and you might want to act as if you have more experience than you have to secure the job.
Well, I’m here to suggest that that’s not the right approach. I fact, recruiters know in advance that as a junior designer you won’t have many years worth of experience so instead of being insincere it’s better to show up with an open mindset and being honest.
A mindset of learning and improving is always welcomed and valued in today’s world. Simple answers like “I might not know X because I’ve haven’t had the chance to get at it but I can learn it as I’m an avid Lerner” go a long way with recruiters.
Put yourself on your recruiter’s shoes, would you rather employ someone “that answers to 90% of the requirements’’ but doesn’t show a growth mindset, or would you employ someone “that answers to 70% of the requirements’’ but shows it’s the thirst for learning and improving?
That’s not to say that you’ll show up with no qualifications at all. You still have to have a certain level of expertise. “Don’t be the guy with 30hrs of experience using Sketch and 1hr of prototyping experience calling himself a UX designer”.
Some skills can be rapidly learned with just a little bit of discipline and will so don’t be afraid to answer with a no if you haven’t had experience with certain techniques due to lack of opportunity of doing so, for example. It’s always easier to learn something new than being perceived as untrustworthy because you said you were qualified to do something but you finally weren’t.
keep in mind that being sincere is always the way… not just during job interviews but in life. Anytime you’re being insincere to achieve something, most probably, the lie will end catching you back and having the opposite effect you wanted it to have.
Anyway, I’ll stop with my “life lessons” and I’ll wish you a very successful interview.
Hopefully, this little advice does help you.
#design-interview #job-interview #system-design-interview #job-interview-tips #ux-interview