Most Asked Java, Spring Boot, M's Interview question for 5+ years experienced in 2023 | Code Decode

In this video of code decode for 5+ years experienced most asked java spring boot microservice hibernate interview questions for 5 years in 2023
Udemy Course link : www.udemy.com/course/master-s...
Can we use HashMap in a multi-threaded environment?
You can use the HashMap for query services (in CQRS Microservices Design pattern ) but the probability of working fine depends on the way we use it. For instance, consider the HashMap of configuration properties, if the HashMap initialization / modification was done by using just one thread, and the remaining threads do the task of reading from the map, then HashMap would work perfectly well.
The problem arises when there is concurrent update on Hash Map. Hence, during such scenarios, we can use the HashTable or ConcurrentHashMap
Is there any difference in defining or creating a String by using String literal and by using the new() operator?
Creating string using the new operator ensures that the String is created in the heap and into the string pool both.
Whereas, creating string using literal ensures that the string is created in the string pool.
String pool exists as part of the heap.
This ensures that the multiple Strings created using literal having same values are pointed to one object and prevents duplicate objects with the same value from being created
What do you know about Factory Design Pattern in Java?
Factory design pattern is the most commonly used pattern in Java.
They belong to Creational Patterns because it provides means of creating an object of different instances.
What are the Spring Boot Starters?
Spring Boot Starters are a set of pre-configured dependencies that can be easily included in your project to quickly get started with common features or technologies.
Spring boot starter is a maven template that contains a collection of all the relevant transitive dependencies that are needed to start a particular functionality.
Like we need to import spring-boot-starter-web dependency for creating a web application.
What is Spring Boot Actuator?
Spring Boot Actuator is a set of features that provide monitoring and management capabilities for your Spring Boot application.
Actuator endpoints expose information about your application, such as health status, metrics, and environment variables, that can be used to monitor and manage your application.
The profile names can also be passed in via a JVM system parameter. These profiles will be activated during application startup:
-Dspring.profiles.active=dev
Whats AOP
Aspect Oriented Programming (AOP) is a programming paradigm aiming to segregate cross-cutting functionalities, such as logging, from business logic in an application
Aspect - Aspect is a class in which we define Pointcuts and Advices.
Advice - It’s the behavior that addresses system-wide concerns (logging, security checks, etc…). This behavior is represented by a method to be executed at a JoinPoint. This behavior can be executed Before, After, or Around the JoinPoint according to the Advice type as we will see later.
Pointcut - A Pointcut is an expression that defines at what JoinPoints a given Advice should be applied.
JoinPoint - Simply put, a JoinPoint is a point in the execution flow of a method where an Aspect (new behavior) can be plugged in.
How can you access a value defined in the application? What is properties file in Spring Boot?
Use the @Value annotation to access the properties which is defined in the application - properties file.
Swagger 2 is an open-source service provided in Spring Boot which makes it easier for the machines to find out the structure of APIs like RESTful Web services.
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[@MrGoodLuck]

Just wondering how did u collect this all questions ,a month back I had an interview and all the questions they asked are from this video 😅but unfortunately I couldn’t watch this video that time ..btw great work 😍please make more videos for experienced java developers where they ask specific example from the projects 😅

[@CodeDecode]

Spent enough time in IT now as interviewer . We know how it works😝. But thanks for your feed back that these are still a fresh question set. It will help others👍

[@somyakumari3238]

How many years experience and which company?

[@sarojsahoo8763]

WebClinet Supports Async communication as well

[@vivithamtp3763]

Your videos helps me do better in each interview ❤ i have improved alot!!!!
thank you so much 🙏😊

[@CodeDecode]

Many congratulations in clearing interviews 🎉🎉 keep learning keep shining 🌟🌟😀

[@ruchitade7196]

very nice content. More Questions for Java, spring boot, REST, SQL 5+ exp would be very much appriciated.

[@CodeDecode]

Sure Ruchita 👍👍

[@pravaskumar7078]

Awesome nice set of questions answered discussion
Very well explained 🙏🙏

[@CodeDecode]

Thanks Pravas 😊👍

[@ravirajpradhan4720]

Awesome...... speechless explained & containt also very perfect

[@CodeDecode]

Thanks Ravi 🙂👍

[@iDeveloper92]

Excellent content!

[@CodeDecode]

Thanks

[@uvanana.]

Thanks 🙏🎉

[@CodeDecode]

❤️❤️

[@hridikasaha9519]

Great explanation. Please make video on some coding questions also. Thank you.

[@CodeDecode]

Sure 👍👍

[@prashantshetty27]

I was thinking of this the whole day and see I got the notification 😂
Thank you 🙏

[@CodeDecode]

🙂😊👍👍

[@jakkalapavithra2734]

Desperately I need this, thanks for posting, also can you please make video on, how we will maintain session from one microservice to another microservice while calling through rest template? Very much needed answer mam? Similarly how we are maintaining transaction from one microservice to another microservice?

[@CodeDecode]

We already have both answered.
ruclips.net/video/Fe_qPM81hJ8/видео.html

[@vishalbharat2801]

How to learn data structure and algorithm..please make video on it as well.

[@kottesravanthi6399]

Thank you So much mam. Today I have selected in one company. I got a clear idea what to prepare for the interviews by following your videos. Eventhough i have three years of career break i got selected. Your videos helped me a lot. Your explaination is very good mam. If i feel any topic is difficult and definately it will becomes easy after listen to your video on that perticular topic. Thank you so much......

[@CodeDecode]

Thank you! We are glad that we could help. Congratulations on your new job, and all the best for your future endeavors!

[@uvanana.]

What and all concepts and questions they are asking

[@uvanana.]

Hii @kottesravanthi6399

[@AutoExciteHub]

Pacakage?

[@kritikharkwal2441]

Ylpllll

[@49_37]

Appreciated your effort Mam 👍❤

[@CodeDecode]

Thanks 😊👍

[@mdumarreza3072]

Ma'am please make videos series on Devops Engineer interview questions and answers

[@muhassinmusthafa3379]

Thanks for ur support...
Expecting more interview questions..
Can you pls upload a detailed explanation of basic hashing, hashing algorithm and new changes recently introduced in hashing if any

[@CodeDecode]

ruclips.net/video/7k0VYHuUF6g/видео.html

[@CodeDecode]

Is this what you need?

[@subhadipde619]

thanks for the video . Please make video on 7+ exp and 9+exp as well

[@CodeDecode]

Thanks 🙂🙂

[@sharadsingh2856]

Awesome

[@CodeDecode]

Thanks

[@parakhrakhee1]

Thank you for great video and explanation. Can you please share link for 7+ experience?

[@ramyal5371]

Appreciated your effort team..
In most of the compnies interviewer asking scenario based questions on Hashmaps .
For ex : if bucket is empty nd if we try to insert key for that bucket will it execute equals method or not.
What happens if we insert same key
Nd mny more.. Could you please come up with such scenario based questions

[@CodeDecode]

Sure 😊👍

[@ayushkumarsone4401]

Hello Mam, I have one questions m Curcyuit breaker has three states Open , Half open and CLosed So any one microservice which is down so it will get up or get repaired automatically after using circuit breaker ? Please answer ,
Thank you , You are making content more than best 🙏

[@ramyal5371]

Could you please explain how security is handled in Microservices.
It's most asked questions.
Need in detail video on it.
It would be great help team.

[@CodeDecode]

Spring Security Interview Questions and Answers with Live Demo: ruclips.net/p/PLyHJZXNdCXseGWynh6MlMrC_CmV0dR8mF

[@sarannav365]

Love the content. Please do more videos on interview questions..

[@CodeDecode]

Thanks sure 👍

[@chiragrathod4757]

Thank you for sharing this video,
Can you please share interview questions video for 7+ years of experience

[@CodeDecode]

Sure 👍👍

[@drumstick_farming]

Plz make a tutorial on how to implement spring security end to end (line by line code) with Oauth2 and bcrypt

[@CodeDecode]

Sure

[@rishabhshukla521]

Thanks for the great explanation 😊

[@CodeDecode]

you're welcome

[@user-tf8rc7wp9r]

Perfect . Loved entire series.

[@CodeDecode]

Thanks

[@SandeepAS-ov3fk]

beautiful.

[@CodeDecode]

Thanks Sandeep 🙂👍

[@shashavalijava9]

Thanks madam

[@CodeDecode]

You’re welcome

[@geetanjalikulkarni4716]

Looking for scenario based questions tooo. ❤

[@pranjalkatyayan5752]

Yes We want For 7+ and 9+ and may be Part 2 for 5+ Years
Looking Forward For Videos

[@CodeDecode]

Sure Pranjal 👍👍

[@KamalaaBalamuraliK]

Hi Team, please kindly provide Scenario based Interview questions for 7+ years of experience. I will be waiting for your video. I am actualy a fan of your voice, the way the explanation is provided is awesome. But still I need how the Interviewer will be asking coding based questions also in the interview. Please help me and many people like me..

[@CodeDecode]

Sure We will create one soon 👍

[@thranduillord001]

AFAIK, when you create String object using new, you need to explicitly call intern to add it to pool

[@okaberintarou5020]

This is the correct answer.

[@humaafreen4002]

thanks a lot mam☺☺☺

[@CodeDecode]

You're welcome

[@sallytkhilaishvili2549]

Nice content, thanks for detail explanation

[@CodeDecode]

You’re welcome

[@KuchNahiBasAiseHi]

Awesome content.

[@CodeDecode]

Thanks

[@sreeni4344]

Create more videos on Spring boot ,Hibernate and JPA

[@CodeDecode]

Sure you will see more videos on this topics soon

[@start1learn-n171]

Tq

[@prakharbhavsar8814]

Thank you so much mam. I got offer letter because of you.

[@CodeDecode]

Many many congratulations Prakhar 💐💐🎉🎉 wish you many more success in your life Man. Keep learning keep shining 🌟🌟🌟🌟

[@ACseries_2023]

Please make video on 7+ years exp for Java Developer (micro service)

[@CodeDecode]

Sure👍👍

[@o7n71a0453]

Please do 7+ and include some more on system designs

[@CodeDecode]

Sure👍👍

[@user-dl1cg8dw1e]

Thank you so much for your videos,
But your going very fast , And my request is to glow slowly

[@CodeDecode]

Sure sure will try to reduce the pace 👍👍

[@nenuanenenuane6645]

Hii please do vedios on react js

[@krishnalakshmi8896]

Can make a video for interview questions for 16+ years in Java. I am looking for architecture level interview questions.

[@CodeDecode]

Sure 👍👍

[@akshayengineer2018]

Thank you so much mam 🙏☺️😊...
Currently I am going through lots of interviews & this same questions companies are asking... Each & every questions I have received in different different companies interview...
Can i get yours LinkedIn Profile link ?

[@CodeDecode]

Agreed even after so many years we have such questions repetitively

[@nowakadam7731]

new String operator create object in heap and in string pool.
It isn't false?
Doesn't it only create object in heap?

[@CodeDecode]

Blogs are divided on this concepts. Some days in both, some says only in heap.

[@Sri_Gayatri_1]

Yes mam coding questions video cheyadii

[@CodeDecode]

Sure 👍👍

[@JitendraKumar-zs2ws]

I want give the on this platform once i study full

[@sagardarade]

Keep it up

[@CodeDecode]

Thanks

[@sarojsahoo8763]

We can also use Synchronized version of hashmap

[@CodeDecode]

That's slow and low on performance side bcz of single thread execution

[@modern_mirror]

Hi,
I have a query.
I have 10000+ entries in an excel sheet. How do I read those and once processed mark as processed for each record.

[@CodeDecode]

We prefer batch processing for such scenarios

[@modern_mirror]

@@CodeDecode can you make a video on that too? Please

[@nidhimanav311]

Please make interview questions for architect level

[@CodeDecode]

Sure we will create it soon

[@user-ht1iv5mu3i]

Hi Team, can you please prepare video for 9years experience also.

[@CodeDecode]

😊 sure

[@ramakrishna2838]

Please do coding questions asking in interview

[@CodeDecode]

Sure we will create it soon

[@shubhamsinghrana9262]

Will they be asked from 1+ year of exp. Also?

[@CodeDecode]

If you are unlucky enough to get strict interviewer then might be

[@kalyanichalamalasetty7725]

could you please share spring boot interview questions vedio for 7+ years expericence

[@CodeDecode]

sure we will create it soon

[@butte_boergoat_Volgs]

how i will get all interview question answer pdf

[@sumanreddy5094]

need some AWS interview questions mam...

[@CodeDecode]

Sure we will create it soon

[@mayankjain2979]

Please create some videos 9+ year experience.

[@CodeDecode]

Sure mayank 👍😊

[@gayatrideshpande5456]

Please add 10+ years experience video

[@CodeDecode]

Sure we will create it soon

[@rishiraj2548]

🙏👍👍

[@CodeDecode]

🙂🙂

[@kesavakonanki1892]

Please more videos on 12+

[@CodeDecode]

Sure we will create it soon

[@geetanjalikulkarni4716]

Pls add 10+ exp interview questions

[@CodeDecode]

Sure we will create it soon

[@anubhutidoshi8999]

can you please create a video for 10+ years of experience

[@CodeDecode]

Sure 👍👍

[@MdJunaid-cx3sy]

"tum bhaut mast kaam karta hai maksood bhai"

[@CodeDecode]

😝😝👍👍

[@pothulamanoj99]

Please make videos for 8+ exp

[@CodeDecode]

Sure 👍

[@puspakdas7675]

😍

[@CodeDecode]

😊😊

[@swathibommideni154]

Please do coding questions asked in 2023

[@CodeDecode]

Sure Swathi 👍

[@prathyushamovva5718]

Please create 7+ years questions also

[@CodeDecode]

Sure we will create it soon

[@charanshelby2396]

You are task is done have fun😂

[@CodeDecode]

😜😊

[@priyankasundar3497]

Need for 7 years

[@CodeDecode]

Sure we will create it soon

[@rokib_ru_cse]

i want to talk with this mam, can i get her linkedin?

[@CodeDecode]

www.linkedin.com/in/codedecodeyoutube

[@rokib_ru_cse]

@@CodeDecode i already sent u connection request in linkedin but yet u didn't accept.... but i want this mam linkedin id.

[@conea6891]

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[@CodeDecode]

👍