Java Design Pattern Interview Questions and Answers [ MOST ASKED DESIGN PATTERN INTERVIEW QUESTIONS]

[@chinmayabhyankar4526]

Your explanation is awesome madam. Thank you for your efforts, very great explanation. keep up the good work.

[@CodeDecode]

Thanks a lot Chinmay 🙂👍👍

[@bharathreddy7840]

Watching your videos is sufficient to attend any backend interviews

[@CodeDecode]

thanks .....

[@akshaysardhara705]

Your content gives senior-level answers of topics any junior can understand and crack all interviews.

[@CodeDecode]

Thanks Akshay for the nice words......

[@sanyammadaan2396]

FANTASTIC!!, I have reading these concepts for almost a year I guess, but never truly understood them. A big thanks for such great work. Keep the good work going.

[@CodeDecode]

Thanks for the motivation 👍

[@sunshinemeadows9462]

you simply rock I am not a computer science student but I am becoming one because of you keep up good work God bless you

[@CodeDecode]

So glad to hear that 👍🙂🙂 keep learning keep rocking 👏👏🎉🎉

[@BaluKompalli]

Your explanation is unbelievably super madam. 12/10 marks for ur explanation. No other words. Because of ur videos i am cracking tech interview rounds. Thanks you so much. But surely one day i will repay you.

[@CodeDecode]

Thanks Balu. We are so proud that you are cracking interviews 😊😊👍👍. Keep rocking keep shining man. All the very best for your future.

[@muralinayani]

I used to watch your sessions to attend interviews. It helps me alot. Thanks for the such nice explanations.

[@CodeDecode]

Thanks for writing back to us 👍👍

[@anirbanhaldar4640]

I am speechless! Your explanation is beyond expectation! keep up the good work! what makes you different from others is your examples are from real time scenarios..what most interviewer expects! hats off Madam! take a bow!

[@CodeDecode]

Thanks a ton Anirban 🙂👍

[@prakashadhikari4058]

Never found such clear explanation!!! Thanks a lot blessed to have you subscribed.

[@CodeDecode]

Thanks for the nice words. It motivates me to put more such videos. :)

[@gandhambharathchandra5135]

@@CodeDecode please put structural design patterns

[@CodeDecode]

Sure will upload soon

[@CodeDecode]

Flyweight(Structural) and Proxy Design Pattern is live now
th-cam.com/video/QfnZGam76kE/w-d-xo.html

[@rajatgupta7488]

You can teach way better than the teachers in my college !!! Keep it up !!! INDORI FOREVER !

[@CodeDecode]

Thanks for watching :) m glad it helps

[@rohinikothavade1761]

Cracked interviews for multiple MNCs by going through your play list.. thank you😊

[@CodeDecode]

Many many congratulations on clearing interview rounds Rohini 🎉🎉🎉🎉 keep learning keep shining 🌟🌟

[@divyareddy8747]

How many years experience ?

[@prsutar2478]

Nice Explanation, One more thing in prototype method, to add delay of 5 seconds in creating objects using new keyword to simulate the cost of creating new object and object created using prototype are fast without delay of 5 seconds

[@CodeDecode]

That's a very nice suggestion 👍👍

[@digitalbytes8714]

You are an Angel to save all the coders here.💥 Thank you so much! 👏💚❤💙

[@CodeDecode]

Means alot to us 🙂🙂thanks 👍

[@prajwalshetty3880]

The way you have explained these design patterns are impeccable, especially Abstract Factory and Builder Pattern with great Real time examples.
Keep up the Good Work. A big thanks to you :)

[@CodeDecode]

Thanks a ton for taking your time out to support us. Means a lot to us Prajwal🙂🙂👍👍

[@kritikashukla9937]

Such simple and sleek explanation. Much grateful! :)

[@CodeDecode]

Thanks Kritika 🙂👍

[@anupamdas3687]

I like explanation ...it is simple and understandable...please upload remaining design pattern..

[@CodeDecode]

Sure. Will upload soon

[@CodeDecode]

Flyweight(Structural) and Proxy Design Pattern is live now
th-cam.com/video/QfnZGam76kE/w-d-xo.html

[@gigmelepcha6546]

Understood in one Go, Beautifully Explained

[@CodeDecode]

Thanks gigme......

[@MBilalabdulkany]

Crystal clear. Good job and helpful for a community of professionals!

[@CodeDecode]

Thanks Bilal 🙂👍

[@aman_deep21]

Thank you for explaining these with code examples, as it helped me to get more clarity about the use cases of creational design pattern through them.

[@CodeDecode]

Thanks Aman 👍👍 m glad it helps.

[@vedikaashtekar4356]

No where could able able to find the crisp and clear explanation like your videos. Kindly explain the next patterns too. Behavioral and JEE.

[@CodeDecode]

Thanks Vedika 🙂👍

[@shubhampote5332]

Ive been watching your videos for sometime now and the way you explain is amazing ma'am. Thank you so much

[@CodeDecode]

Thanks and welcome shubham

[@boxerlobsters]

Super helpful channel. I have been bing watching a lot of videos and it has boosted my confidence in java.

[@CodeDecode]

Thanks nikhil

[@everythingsoftwarebyrushi1808]

I really appreciate and thank you a lot Madam. The video explains the content in a crystal clear manner. I will definitely share this with my peers and recommend it to developer at any level.

[@CodeDecode]

Thanks Rushikesh. 👍👍we are glad to have u as a part of code decode family. 👍👍keep learning keep shining ⭐✨

[@kavitakumawat4929]

Trust me you are amazing at the job you doing currently 👌 How u have simplied everything is too good! Thank you soo much for all these videos. Have decided to go watch each and every video of yours and will share it with my other friends too! Shukran 💕

[@CodeDecode]

Thanks for the motivation kavita

[@firsttestlasttest1951]

Superb explanation with real time examples; You made me to understand these concepts. Thank you.

[@CodeDecode]

😊👍

[@pdolley5622]

I really appreciate your hard work and it's helping a lot.. I don't find any channel or anyone explaining the way you are doing...
Small request it would be great if u ionout or resequence ur playlists... Please

[@CodeDecode]

Sure. We have updated the playlist now. Thanks for the suggestion👍👍

[@CodeDecode]

Thanks for the nice words dolley 👍👍

[@intrdaytrader230]

TH-cam should.have suggested me this channel before...awsome explanation awesome videos...keep it up!!Thanks for posting

[@CodeDecode]

Thanks for the nice words 👍

[@DurgaPrasad-xp5fi]

I like the way of explanation. It's simple and understandable. Please upload the remaining concepts.

[@CodeDecode]

Thanks a lot durga 🙂👍

[@itsjeevani4617]

You are doing an amazing job by helping many people to understand or brush up the core concepts. But I would like to mention that what you are referring as a hashcode is not actually a hashcode. It's an address to an objects memory location. Hashcode is certainly be a number, formally an integer...
However, you are an angel for many to land in their dream jobs. Keep rocking..

[@shravanijanadri2281]

It’s hashcode only , hexadecimal representation of an object , please read through basics before commenting might mislead others

[@balakrishnagajam]

I am preparing for interviews now. Its quite helpful. Please do remaining Design patterns also. Thanks in advance.

[@CodeDecode]

Sure will upload them soon. All the very best for your interviews. 👍

[@CodeDecode]

Flyweight(Structural) and Proxy Design Pattern is live now
th-cam.com/video/QfnZGam76kE/w-d-xo.html

[@ganeshtiwari3318]

Everytime you explain is very easy to understand and its been always pleasure to listen you. Keep up the good work 👍🏻

[@CodeDecode]

Thanks! 😃

[@shaileshprajapati2326]

Good work, awesome explanation.
Could you please create more videos for remaining design patterns...behavior and structure design patterns...

[@CodeDecode]

Sure

[@CodeDecode]

Flyweight(Structural) and Proxy Design Pattern is live now
th-cam.com/video/QfnZGam76kE/w-d-xo.html

[@sattibabuchittala]

We want all design patterns, explanation madam. It is really amazing video

[@CodeDecode]

Sure 🙂👍

[@pragyanaranjanbiswal8419]

There are few other steps for creating object which we can consider in this Singleton DP. Like cloning, Serializable etc. If you will cover those then I think we can call it as perfect Singleton class. Rest awesome lecture.

[@CodeDecode]

That's covered in core Java part. There I have covered ways to create a singleton classes. That's why I have given just one way to create singleton class here as we have already covered ways in previous videos.

[@CodeDecode]

This video was specific to design pattern hence i don't want us to deviate from our objective. Please do watch other videos for other ways.
Thanks for watching 👍😊

[@aleenajohn7122]

Awesome..No words to explain.Its a great effort.Thank you so much.

[@CodeDecode]

Thanks Aleena 🙂👍

[@prabakarang1681]

Thanks for your video. It's really helpful for me. Yes pls explain all design patterns.

[@preethakandasamy5567]

Ur explanation was simple and clear.. reading from websites weren't this effective.. it was that understandable.. please can you explain other design patterns too?

[@CodeDecode]

Sure. Will create soon

[@CodeDecode]

Flyweight(Structural) and Proxy Design Pattern is live now
th-cam.com/video/QfnZGam76kE/w-d-xo.html

[@mithdhan]

This is too good and keep the work continued. Excellent videos and it helps to understand in detail of each java patterns.

[@CodeDecode]

Thanks for the nice words.....

[@sachida23]

Please share the rest of the design pattern's in detail your explanation is really in deep, thank you so much !

[@nagendrasai3946]

What an explanation!!!….awesome….you are the best….

[@CodeDecode]

Thanks 😊😊

[@kittunew]

I was always struggling with DP. You are awesome girl. Thanks a lot.

[@CodeDecode]

Thanks🙂🙂

[@suryabandaru7924]

This is a simply superb video with very good practical examples. Thanks ton!

[@CodeDecode]

Thanks Surya 👍👍🙂🙂

[@vrushalikarla8795]

This session was Very helpful and with details of every pattern. Please explain all other design patterns as well

[@CodeDecode]

Sure will make other parts too soon

[@CodeDecode]

Flyweight(Structural) and Proxy Design Pattern is live now
th-cam.com/video/QfnZGam76kE/w-d-xo.html

[@abc5.-_]

Crystal clear n to the point tutorials, great set of videos can be found here in this channel....Nice explanation ma'am

[@CodeDecode]

Thanks 👍

[@sandeeppatil5587]

Very nice and very easy to understand the way of explanation. Thanks a lot.

[@CodeDecode]

Thanks sandeep

[@amitkumar7221]

Most most important and complex design pattern you explain very well which could we understand well thanks for this ❤❤

[@ashishtiwadi]

Thanks for the video. but example you showed for factory design pattern violets the open close principle. Rest of the contents are so informative. Thanks again.

[@monishad7040]

Thank you for your efforts and clear explanation. Usually I never leave comments in TH-cam. But u 🎉🎉🎉🎉.

[@vinothkumarg7731]

Very good and clear explain, understanding becomes much easier,the way of solution and approach is (theory explanation +practical solution) is interesting for each question.
Pls do more on this mam.

[@CodeDecode]

Glad you liked it

[@CodeDecode]

Flyweight(Structural) and Proxy Design Pattern is live now
th-cam.com/video/QfnZGam76kE/w-d-xo.html

[@Bullloader]

Simple and clear explanation ❤

[@CodeDecode]

Thank you 🙂

[@sindhusudhakaran1731]

thank you so much .. the examples used in the video, helped in following the explanations

[@CodeDecode]

Thanks 👍👍

[@saiyyed_dev]

Wow that was an absolutely brilliant explanation. Truly impressive.

[@sherinein]

Explanation is very good . it's help interview purpose . kindly maximize your slide. Because font size is small . Voice is very clear . presentation also good . please upload more videos.Try to cover all topic related to java full stack

[@CodeDecode]

Sure Nirmala, we will take care of it from next time. Thanks for letting us know 👍👍

[@priyanka0112]

please cover facade and behavioral design pattern. Also cover SOLID Principals. Your way of explainaition is amazing.

[@CodeDecode]

Sure priyanka we will plan and make video on the same. Thanks for the nice words.

[@SitaramLanka]

Very good explanation. Thanks for making this detailed video !!

[@CodeDecode]

Thanks Sitaram 👍👍

[@kushshrma4844]

You're channel has really good content, helps a lot as a quick refresher before interviews.
Wish I would have subscribed to this channel sooner!!
Keep up the good work.

[@CodeDecode]

Thanks 👍👍

[@gajendraparmar6162]

your content is awesome,i'm able to crack the interviews.Thanks to your content and ease of explanation

[@CodeDecode]

That's a great news Gajendra that you cleared your interview round. Congratulations 👏👏🎉🎉🎉🎉. Keep learning keep growing Man 👍👍

[@manjulanam3968]

Thank you for the clear explanation with examples!

[@CodeDecode]

Appreciate your nice words. Thanks 👍

[@seelamrameshreddy702]

Thanks for the lot of effort. Please upload videos of all other design patterns as soon as possible.

[@CodeDecode]

Sure

[@CodeDecode]

Flyweight(Structural) and Proxy Design Pattern is live now
th-cam.com/video/QfnZGam76kE/w-d-xo.html

[@sonujain4768]

It was helpful. Thank you for covering "Design Patterns". Please make videos for remaining design patterns.

[@CodeDecode]

Thanks for watching. :) Sure will do that 🙂

[@thirunavukkarasut8411]

Please create videos for other categories too.

[@demchuckdima]

In case of singleton
you should also add volatile

[@Thaaranya]

Wonderful explanation. Please do this kind of videos in detail

[@CodeDecode]

Sure thanks 👍😊

[@devendra.sanghavi]

thank you again

[@CodeDecode]

Thanks a lot Devendra 🙂🙂

[@Priya1_123]

Please post other design patterns as well. Nice explanation as it includes code as well

[@CodeDecode]

Sure will upload soon

[@CodeDecode]

Flyweight(Structural) and Proxy Design Pattern is live now
th-cam.com/video/QfnZGam76kE/w-d-xo.html

[@vishalkadu7688]

Like the way you explains everything starting with theory then practical implementation.. never found such a well structured tutorial..keep going with the same 👍

[@CodeDecode]

Thanks 😊

[@SatyaPatradtcom]

It would be nice if you upload Behavioral design patterns. Thanks in advance:)

[@CodeDecode]

Sure. Will upload soon

[@sakshamsangal9270]

awesome 😍😍😍😍 Your teaching is addictive.

[@rudreshangadi]

Ma'am just awesome,ur explanation level is extraordinary, 😍 thank you soo much, please share remaining design types like structural, jee and behavioral design pattern, thanks once again

[@CodeDecode]

Sure 👍👍

[@rediettadesse5488]

This is Awesome, Thank you very much and please keep it up

[@CodeDecode]

Thanks Rediet...

[@rajajodhani]

Just one word "Amazing"

[@CodeDecode]

Thanks Raja 🙂🙂👍👍

[@priyankaS17]

Awsome explanation with clarity. Please upload videos on other design patterns like structural and behavioral . Waiting for it. Thanks a lot for this video.

[@CodeDecode]

Will upload that next 👍

[@CodeDecode]

Flyweight(Structural) and Proxy Design Pattern is live now
th-cam.com/video/QfnZGam76kE/w-d-xo.html

[@vikasgc3456]

Very well explained!! Please do create other design patterns.....

[@CodeDecode]

Thanks 😀. Our next video will be on other design patterns ...

[@CodeDecode]

Flyweight(Structural) and Proxy Design Pattern is live now
th-cam.com/video/QfnZGam76kE/w-d-xo.html

[@omkardhorge6134]

You explained it very well. Would love to see the vedios on remaining categories.

[@CodeDecode]

Sure 👍👍🙏🙏

[@sajalmathur549]

please cover other design patterns also. Please release new video everyday. You are good at it

[@CodeDecode]

Flyweight(Structural) and Proxy Design Pattern is live now
th-cam.com/video/QfnZGam76kE/w-d-xo.html

[@davidgupta110]

Nice Explanation with good clarity.

[@CodeDecode]

Thanks 👍

[@hackerhacked625]

Thank you so much! The tutorial was well explained and the patterns were simplified throughout the tutorial! :)

[@CodeDecode]

Thanks for the nice words.

[@hansirawat9322]

You're outstanding. Please create videos for other patterns as well.

[@CodeDecode]

Sure will do that 🙂

[@hansirawat9322]

@@CodeDecode You're too good in explaining concepts!!!!!!Please make for Spring and Java 8 streams & Predicate as well. All my friends are watching your videos. it's helping us in college project :)

[@CodeDecode]

That's very nice thing to say hansi. thanks for watching. i will upload these topics soon.

[@ashwithchakinarapu1906]

Very Good explanation Thanks for providing videos...

[@CodeDecode]

M glad you found it helpful

[@sankarasubramanian568]

Thanks for this :) nice explantion !!

[@CodeDecode]

Thanks Sankara 🙂🙂

[@nikhilmadaan29]

Factories creating engineers, well that's true everywhere i guess😆, Great content though been a follower since 2021

[@CodeDecode]

Hehe thanks Nikhil !!

[@Suraj-tz3oq]

But trainee engineer and trained engineer will have similar properties so they should also inherit a parent class Engineer.
Likewise for teacher classes

[@subramanianchenniappan4059]

Thanks . I am an experienced java dev. This is helpful for intvw prep 😊😊

[@CodeDecode]

All the best for your interview preparation 👍

[@shalakaarekar2432]

Amazingly explained. Kudos to make this look so simple. 👍🏻

[@CodeDecode]

👍👍thanks Shalaka

[@sagarmeena0210]

very good explanations with code....thanks will have in the interviews

[@CodeDecode]

👍👍

[@anjalipatel5541]

Very well explained. Please share video for other patterns

[@CodeDecode]

Sure 👍

[@CodeDecode]

Flyweight(Structural) and Proxy Design Pattern is live now
th-cam.com/video/QfnZGam76kE/w-d-xo.html

[@subhamgoswami8607]

Great video really helped .. initially had some complexity understanding abstractFactory but after giving it a try now i am comfortable .. thanks a lot :)

[@CodeDecode]

👍👍😊😊

[@Laxmiprasadlaxman]

Thank you so much….!! Your videos are very informative, helpful and very interesting..! Thanks a ton for sharing this. ❤
Please do create for other design pattern also. 🙏🏻

[@iAmVishalGupta]

Like the way you explain.
You can upload your example projects on GitHub or some other hosting site and share the link in video description.

[@CodeDecode]

Sure I will share the git hub link in description for the project we have created

[@iAmVishalGupta]

@@CodeDecode thanks 👍🏼

[@CodeDecode]

This is the git ssh link: [e-mail]:codedecode25/design-patterns.git
this is http link :
github.com/codedecode25/design-patterns.git
Please let me know if its working or not

[@iAmVishalGupta]

Yes, it's working 👍🏼

[@basitsayeed2111]

Simple and quality content

[@CodeDecode]

Thanks Basit 🙂👍

[@EasyTechStudios]

Great content. Please upload more videos.

[@CodeDecode]

Sure :d

[@gokulaher2476]

Very nice video, requesting you to pl. make videos on remaining design patterns as well.
Thanks!

[@CodeDecode]

th-cam.com/video/QfnZGam76kE/w-d-xo.html

[@gokulaher2476]

@@CodeDecode thanks for sharing the link for DP Part II
By the way in one of my comments I have suggested for writing Interview QA book author by you, by chance did you look at that comment?

[@Reality-On-Check]

Nicely explained, Thankyou!

[@CodeDecode]

👍

[@dpkpk1573]

Excellent explanation thanks....🙂

[@CodeDecode]

Thank you 🙂👍👍👍

[@amanbagdi3425]

Very well explained......Please upload videos of all other design patterns as soon as possible...... craving for it😅😅

[@CodeDecode]

Will upload that soon

[@CodeDecode]

Flyweight(Structural) and Proxy Design Pattern is live now
th-cam.com/video/QfnZGam76kE/w-d-xo.html

[@devanshusharma3733]

I love that watching your knowledge full videos👍. Thanks lot to creating knowledgeble video🙏. If you can give some real life example in design pattern then it goods to relate. If possible then please make video on design pattern use in spring framework. It can help to make easier spring related queries in interview.

[@CodeDecode]

Sure Devanshu. Will do that 👍👍

[@rexsam3134]

Which book or url you referred for that image at very start.
Builder pattern : can you share some complex object in any project you have worked? Not referring to the flood or earthquake example

[@abhinavmishra9690]

Thanks a lot. All Design patterns explained beautifully and in a crisp manner alongwith code implementation. 🙂👏. Can you please make some more program and code implementations of java 8 features using custom objects like Employee class etc.

[@CodeDecode]

th-cam.com/play/PLyHJZXNdCXsfcMboYwGoL6wKAFPxljz5W.html

[@mouryas4671]

Please cover the rest of the three design patterns. As all the Content is so useful

[@CodeDecode]

👍 sure

[@saurav5s]

You are a legend. Thanks a lot !

[@CodeDecode]

Thanks for the nice words saurav