Top 30 .Net Core Interview Questions in 30 mins - .NET C#

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This video contains the top 30 .NET Core interview questions.
If you are preparing for .NET interviews then you can subscribe this channel for more questions on .NET skill.
Timestamps
00:00 - Introduction
00:36 - What is .NET Core
01:15 - Advantages of .NET Core Over . Net Framework
03:06 - Explain default project structure ?
04:53 - Role of Program .CS file
05:47 - What is the role of Startup.cs file?
06:51 - What is the role of ConfigureServices & Configure method?
08:39 - What is Dependency Injection in ASP.NET Core?
12:56 - What are the types of Service Lifetimes of an object/ instance in ASP.NET Core?AddSingleton, AddSoped and AddTransient method?
15:31 - What is Middleware in ASP.NET Core?
16:44 - What is Kestrel?
17:50 - What is the difference between Kestrel and IIS?
18:47 - What is request Delegate ?
20:43- What is Host in ASP.NET Core ?
21:53 - What are the various techniques to save configuration settings in ASP.NET Core?
22:43 - How Routing Works?
23:27 - Explain Attribute Routing ?
24:21 - Complete Request processing pipeline?
24:56 - Can ASP.NET core application work with .NET 4.X Framework?
25:20 - What is metapackage ?
26:11 - How ASP.NET core serve static files ?
26:42 - Various JSON files ?
27:56 - .NET Standard ?
28:33 - Razor Pages ?
29:14 - Dependency Injection ?
30:19 - Custom Middleware ?
31:51 - Explain session and state management ?
33:17 - Explain model validation ?
33:59 - How to handle errors ?
35:17 - How to enable session ?
35:46 - Explain Model Binding ?

[@vamp9225]

This was an excellent overview of core concepts. Fantastic work and ability to provide low level details without getting off track. Thank you very much for sharing this with the world you are a tremendous instructor. It deserves more views and you deserve more subs!

[@interviewhappy]

Thank you so much Vamp.

[@skpb1947]

It covers most of the .Net core interview questions. Explanation to each question is awesome and explained very clearly easy to understand when you see this first time itself. Thanks for the video.

[@sneigee]

Nice one and also check this Real E-Commerce App using .Net 5 and Angular 13
Thanks
czcams.com/video/-IzpsC-0eBk/video.html

[@interviewhappy]

Thanks a lot Sunil. I will bring more content shortly.

[@1ppatrick]

Provide amazing understanding of many .net core concept.

[@subh2k5]

Very well explained. Good efforts taken for presentation slides etc. Thanks

[@amarpreetsingh6016]

Excellent 👌🏼 . Everything covered of .Net Core

[@interviewhappy]

Thanks Amarpreet. My best wishes if you are preparing for interviews.

[@sheshnathvishwakarma9661]

Great sir 🙏
It's amazing lecture for interview purpose. Thanks sir

[@interviewhappy]

Thanks Sheshnath

[@rushabh2707]

DO have interview after an hour but stopping to appreciate the way you have explained Dependency Injection. Hatts off....!!

[@nageshkotha3896]

Thank you very much for providing interview questions without any cost. I have gone through these videos 10 times, and now I know the .net core/Angular/JavaScript/SqlServer/Webapi concepts. finally, I got an offer.

[@interviewhappy]

Wonderful! Congrats @nagesh

[@xxx.xxx.xxx.xx1joker706]

Awesome and step by step explanations. Excellent work and useful tutorial.

[@interviewhappy]

Many thanks for your appreciation. All the best if you are preparing for interviews.

[@DebasmitSamal294]

Awesome... What an amazing video... it refreshed my skill after a 3 months gap. Hats off sir. Good job

[@interviewhappy]

Thank Anshika, it gives me power to create more.

[@jasonaguilera6148]

This was really helpful! I really liked the pacing and conciseness of the explanations for each question. Thank you.

[@interviewhappy]

You're very welcome@ Jason

[@rahulgharat4460]

Awesome explanation . We are expecting many more to come

[@interviewhappy]

Thanks a lot for your comment. It motivates me to create more content.

[@gulamsarwar8258]

So far the only tutorial I've seen that takes it slow and doesn't require prior experience to soft design.

[@interviewhappy]

Thanks Gulam

[@avinashbora]

Amazing Explain. Pleasant to watch, waiting for many more to come.

[@interviewhappy]

Glad you liked it!

[@omarsadiq1623]

Excellent tutorial, To the point content, simple and brief explanation.

[@rajkumararora7366]

Happy sir, you are great in simplifying leanings. Good luck for your future videos!!!
Thanks !

[@interviewhappy]

Thanks Raj. Good luck for your career and life.

[@katyayanisahu9811]

Very helpful 👍Thank you so much sir

[@saraefaf8496]

this was excellent,thanks

[@vamp9225]

You may consider splitting each lesson into a CZcams short and releasing them this way. I think this could help drive traffic to your channel. Each one is so concise and rich with information

[@interviewhappy]

Excellent idea... I will definitely do this soon. Please keep suggesting. All my implementations are originated from ideas of the viewers like yours only. Thanks again.

[@vamp9225]

@@interviewhappy what was most valuable for me was walking through the file structure, data flow and configuration. I come from a Java / spring background and have yet to find any good content that explains these beyond the superficial.
Have you considered exploring testing? That is the next concept I would love to see detailed using your approach. Specifically API testing. Thank you again for the content it has been invaluable.

[@interviewhappy]

@@vamp9225 ​ going deep in testing will be slightly off the road, because my purpose is to clear the basics and then focus on interview important things. Testing is not so much asked, but I will consider this in near future.

[@experimentalSR]

add any unit testing related questions

[@CaioUechi]

Amazing video, thank you very much man! :)

[@Vykhari1]

Thank you!! Excellent work..

[@natalija4583]

Thank you so much! Great explanation for dependency injection. Finally I understood.

[@interviewhappy]

Glad it helped! Natalija

[@GT-fd8kr]

Excellent collection of questions with detailed explanation for review before the interview. Thank you.

[@interviewhappy]

Glad it was helpful!

[@kshashank11]

Startup.cs is no longer available with .NET 6 .. Microsoft has removed it and you have to configure services in Program.cs itself

[@RAHULRAJ-bs1ky]

Yes but by making a few changes in program.cs file we can bring start up.cs file into picture .

[@Abhishekmaurya-ol4iy]

There is only program.cs

[@logicismagic5195]

I ever not seen any video like this . Awesome explanation and all questions covers .thank you sir .I love to see more video like this .👍

[@sneigee]

Nice one and also check this Real E-Commerce App using .Net 5 and Angular 13
Thanks
czcams.com/video/-IzpsC-0eBk/video.html

[@interviewhappy]

Thanks logic. Love your comment.

[@nainajainuniverselovesme1998]

hello please help i m fresher as .net developer preparing for interview...please suggest me channels with good content for my prep. Thanks in advance

[@nandhukrishna]

Thank you so much for sharing this video .

[@interviewhappy]

wc M.k

[@ankitbisht3794]

Please also cover those string array questions cause they are asked in many interviews for even experienced devs

[@zeeluck7128]

Excellent

[@pawanmengade7239]

Hi Happy, the interview questions for .Net Core and Angular are very helpful. Because of these I'm able to prepare for both frontend and backend and able to clear interviews with ease. Keep up the good work.

[@kgoute5099]

Thank U so much for the video and Really awesome explanation each and every question ....

[@interviewhappy]

Thanks Goute ... I wish you all the best if you are preparing for interviews.

[@dotnetfullstack3217]

Excellent collections of topics to revise before giving .net interviews

[@FancyRecoder]

Great lesson!

[@shubhamavdhut7431]

Thanks very much, it's cover All concept with a short explanation so we can easily remebar. Please upload more videos like this in also C#

[@xxx.xxx.xxx.xx1joker706]

And also for Blazor, please 🙏🏼.

[@interviewhappy]

Sure I will. Thanks Shubham for your kind words.

[@mohdahmad9272]

Pl

[@rkmeetris55]

U have touched lots of concepts

[@asingb]

Thanks a lot, you covered most of the topics.

[@interviewhappy]

wc Anupam

[@ritiarya1843]

Thank you so much your video is really very helpful and cleared my dought about the middleware concept. Thank you so much by heart. Keep it up

[@interviewhappy]

Thanks Riti. Words like this motivates the content creators.

[@tamilanveeran4864]

Very nice explanation sir, post More videos like this...

[@interviewhappy]

Thanks Tamilan, I will surely do.

[@manuelgamezz]

Excellent information Mr. thank you very much 👍

[@sneigee]

Nice one and also check this Real E-Commerce App using .Net 5 and Angular 13
Thanks
czcams.com/video/-IzpsC-0eBk/video.html

[@interviewhappy]

Thanks Manuel for your kind words.

[@pranikpratik]

Nice Explanation ! Easy to understand !!

[@interviewhappy]

Thanks Pratik

[@rashmisharma7388]

Thanks Happy . It is awesome tutorial which helped in interview preparation

[@interviewhappy]

welcome Rashmi.. Wish you best of luck for your interviews.

[@sanjurocku9511]

Fantastic video.. really appreciate it.. it is very useful for instant understanding of the platform. Just one thing.. with the latest version of .NET startup file is removed so You can mention that too.
Thanks again!

[@TypeCoy]

Knowledge is very easily gained from Videos. And I love this one, because it is straight to the point and informative. Thanks and awesome video. Subscribed!

[@sneigee]

Nice one and also check this Real E-Commerce App using .Net 5 and Angular 13
Thanks
czcams.com/video/-IzpsC-0eBk/video.html

[@interviewhappy]

Thanks a lot techie

[@rkfactsstories]

Great and clear explanation expecting more 🙏

[@interviewhappy]

Thank you, I will

[@khanataurrahman6000]

very helpful.

[@aminajaved8421]

You are just amaizing man....hatsoff...
This video is just like blessing.
Thanku brother.Allah bless you:)

[@ShubhamKumar-sz1fl]

Really Great video.. so much learned from this video. :)

[@interviewhappy]

Thanks Shubham, keep learning keep growing

[@lakshmankumargupta829]

Really It's a very impressive and informative Video.

[@interviewhappy]

Glad you liked it@lakshmankumargupta829

[@SrinubabuRavilla]

This one video is enough to clear the technical round about the .NET Core. Thank you for this video and you earned one more subscriber. Keep posting...

[@interviewhappy]

Thanks Srinu, that is my mission only. Interviews should not be a nightmare anymore.

[@rojishvarughese9951]

Well explained

[@NadeemAhmed-ik4zt]

Awesome Sir !! Please create a Angular(2+ till latest) Interview questions also.

[@parth7450]

finally understood DI , thanks a lot

[@interviewhappy]

Glad to hear that @parth7450

[@yashviyadav5894]

Really a good refresher

[@interviewhappy]

Thanks Yashvi

[@sharadap83]

Very well explained sir

[@HasanAkaRyu]

superbb explaination thanks alot .

[@interviewhappy]

Thanks and wc Syed

[@meerapaul1315]

Great and Thanks Sir.

[@interviewhappy]

Thanks for your words Meera

[@AmrutDeshpandeM]

Hi Happy,
Thank you for the videos. Those are really helpful. In one of the the interview I gave recently interviewer asked if a question related to dependency injection.
1. services.AddSingleton();
2. services.AddSingleton();
In above scenario 2nd will overwrite 1st.
Suppose we have MathStudent and ScienceStudent and both refer to same interface IStudent and that have method like getStudent(). We will register in configureservices method but suppose I want to call MathStudent/ScienceStudent at specific condition the how to call it.
Please correct me if I missed.
Warm Regards,
Amrut

[@interviewhappy]

If you want to use them on condition basis, then use IServiceProvider which will help in resolving instances at run time. You can explore this.

[@rajnishazad4548]

Thank you Happy for clear me Dependency injection pattern.

[@interviewhappy]

Welcome Rajnish. All the best for your career.

[@yoummr1]

thank, nice and easy to understand for most of them

[@interviewhappy]

Thanks Rahman, glad you liked it.

[@user-rw6ye8xk9v]

Wow, super useful!!!

[@MohdMoinuddinVohra]

Nice explanation.

[@interviewhappy]

thanks

[@abhijitdeshpande965]

Best interview question for .Net core

[@interviewhappy]

Thanks buddy and all the best for your career.

[@rasikasamith]

Great video. Thanks a lot.

[@interviewhappy]

Glad you liked it! Rasika Samith

[@ArbajShaikh-cb4rt]

Thank you Sir. This Video is very helpful...

[@RahulTiwari-tk6yt]

Great Sir,
Please crate video on WEB API like this.

[@interviewhappy]

Thanks Rahul, I will create on web api shortly.

[@karthikTech0793]

Hi, @Happy, really happy to see your videos, it helps me understand the concept. Thanks a lot. I need one detailed answer about question 18. Can you please make a video for it.

[@interviewhappy]

Thanks Karthik, I will try to cover it soon.

[@theaspirent2544]

Sir you are very lucky for me... I am so thankful to you.... I cleared 3 out of 5 interviews with your help

[@interviewhappy]

Wonderful and Congratulations My Friend.

[@akshatanayak9424]

Your video is very Valuable and Full of Knowledge Sir. If possible please make a video on Data Engineering interview questions

[@interviewhappy]

Thank you so much Akshata.

[@prithivgk]

Really helpfull Happy, The effort you have taken to lift-up others is amazing.. my hearty congrats

[@interviewhappy]

Your Welcome Sir. Your words are inspiration .

[@keentodiscover2021]

Awesome ... you explained some very complex things very easily. I would love to see this in the form of blog. Please let me know if it is available. Thank you

[@interviewhappy]

Many Thanks friend... Blog not yet, but soon I will try

[@chethann905]

Nice explation ,
Create . net core Api and angular 8 interview questions

[@sneigee]

Nice one and also check this Real E-Commerce App using .Net 5 and Angular 13
Thanks
czcams.com/video/-IzpsC-0eBk/video.html

[@interviewhappy]

Thanks Chetan. Sure slowly slowly I will cover more topics.

[@nellutlakiran2347]

TQ Bro

[@MatiUllahZahir]

What an explanation ....Just amazing...... Thankyou very much for ur hard effort and great explanation....

[@interviewhappy]

You are most welcome @Zahir

[@n-channel6468]

Great video

[@interviewhappy]

Thanks N-Channel

[@divya.g7319]

Wonderful explanation... I came across so many videos, this is amazing and easy to understand

[@interviewhappy]

Glad you liked it

[@PratikPachal]

Excellent !!!. Just check pronunciation of couple of words. Rest all good.

[@interviewhappy]

Thanks Pratik

[@pranavb9768]

Great explanation sir jee 👍🏽👍🏽

[@sneigee]

Nice one and also check this Real E-Commerce App using .Net 5 and Angular 13
Thanks
czcams.com/video/-IzpsC-0eBk/video.html

[@interviewhappy]

Thanks pb ji

[@nidhi8729]

Awesome video 🎉... very well explained

[@interviewhappy]

Thanks a lot 😊

[@sureshv7739]

really excellent and awesome

[@interviewhappy]

Thank you Suresh! Cheers! Wish you luck for your career.

[@ManOfAdventure2011]

Very good tutorial!!

[@interviewhappy]

Thanks Neil, all the best for your career.

[@sergeymigel4680]

Thank you, bro!

[@interviewhappy]

wc Sergey

[@kumarramas]

Very useful Thanks. Seems, TempData work is different (controller to controller)

[@Narendra471]

hi happy sir di explain is simple and good
provide on linq and angular

[@interviewhappy]

Thanks Narendra.. Noted. I will try to create more videos on .NET interviews.

[@atulbhandari2786]

Awaiting for your new vedio

[@interviewhappy]

I posted a new video Atul. Hope you will like it.

[@noranora847]

Thank you so much. Please also share the coding test interview sessions if possible.

[@interviewhappy]

Sure I will try to do it soon.

[@imgopi]

Very well explained 👏

[@interviewhappy]

Thank you 🙂

[@blkirhymes129]

Nice explanation

[@interviewhappy]

Thanks

[@pradeepkumarpatel2021]

it is understood excellent overview of core concepts sir. but I can find a pdf of all questions and answer

[@ghkhellfire007]

fantastic

[@interviewhappy]

Thank you so much 😀. All the best for your career.

[@tusharkantidas4622]

Very informative and helpful video. But only TempData definition is wrong.

[@interviewhappy]

Thanks Tushar.. Appreciate you liked it

[@engineersovernight]

Although your contents are so good

[@atulbhandari2786]

Great sir very effective tutorial . Very pls creata lot of vedio regarding the topics thanks sir for giving such a great knowledge

[@interviewhappy]

Thanks Atul. Sure I will create more videos so that every candidate can clear any .Net interview.

[@SivaKumar-sy6vw]

Thank you for the best explanation.i haven't seen the pdf in discription, can I get this pdf

[@jayashreepatil9208]

great thanks u so much

[@interviewhappy]

Thanks Jaya. All the best for your career.

[@sahilshikalgar4116]

well explained

[@interviewhappy]

Thanks Sahil

[@rajatnagpure7445]

U really made me happy! thankyou!

[@interviewhappy]

Your Welcome. Rajat

[@AmwayPratik]

A small rectification needed Sir,
32:30 TempData is used to pass data from Controller to COntroller, Please correct me If I am wrong Sir :)
Apart from that this is very helpful video indeed, Thank you Sir 😇

[@srkbhayo]

Transient objects are always different; a new instance is provided to every controller and every service.

[@jenik6210]

Thank you

[@interviewhappy]

You're welcome @jenik6210

[@denitsageorgieva7209]

I watched it and I tried to answer each question before you gave the answer. I am so happy because i answered almost all of them correctly and i am only 7 months into a level 3 software developer apprenticeship heheee!!! Amazing video!!

[@interviewhappy]

Great Denitsa, I think it's the best way to practice.. wish you all the best for your career.

[@HeroReact]

@@interviewhappy евала Деница, мачкай

[@sanjnaputhran7001]

Can you make videos on Azure interview questions?