HCL Java realtime interview | Java 8 interview questions and answers, springboot microservices kafka 

1)what is immutability 2)How can we create our own Custom Immutable class 3)If the immutable class dont have setter methods then how can you set the 4)values for the instance fields 5)The getter method will return cloned object or the actual object 6)Life cycle of a Thread 7)What is the use of wait() and sleep() 8)Difference between wait() and sleep() 9)Use of join() 10)Use of yield() 11)what is ConcurrentHashMap 12)ConcurrentHashMap vs HashTable 13)What is Garbage Collection 14)If I create a Object where it will be created 15)Different parts of the Heap Memory 16)Which JDK version you are using 17)Features of Java 8 18)What is default methods in Java 8 19)What is Singleton class 20)How we can create our own Singleton Class 21)How can prevent a Singleton class from getting cloned- we need to implement/override the clone() method and throw an exception CloneNotSupportedException from the clone method 22)How can we break the singleton pattern 23)Serialization and Deserialization issues with Singleton 24)what design patterns you have worked on? 25)What is factory design pattern- Spring Bean Factory is example of Factory Design Pattern 26)Default scope of Bean 27)Different types of Bean Scopes 28)What is Dependency Injection 29)Types of Depedency Injection- Constructor and Setter Injection 30)How polymorphism works in Spring- explain @Qualifier 31)Have you worked on Spring Security? How it works 32)Advantages of Microservice over Monolith 33)How do you scale the Application using Kubernetes 34)How will you run the Docker image and deploy..tell the commands 35)Can we achieve auto scaling using Docker or is there any limitation 36)Can you tell the services in your microservices application and how do they interact with each other 37)What is Pub/Sub in Kafka 38)How many subscribers can subscribe to the Topic 37What is the role of Broker in Kafka 38)Diff between Power Mock and Mockito 39)Methods supported by Stream- filter(),map(),flatMap() 40)How can you find the second largest number in a list of integers 41)Avg salary of each department using stream 42)How can you convert the list into Map 43)Method references in Java 8 44)JPA specification executor- u can use criteria 45)What is executor in context of Threads 46)How can you remove the duplicate elements from the array without using any built in classes or methods 47)How do you reverse a singly linked list 48)what is doubly linked list,circular linked list 49)2nd highest salary using sql 50)git commands, rebase

Thanks for sharing such video. Helps a lot in understanding

We have a tree which gives a pure mango healthy. But software industry changed changed this concept.. Now the Mango tree is same and they are demanding different fruit to the tree.. Now they need , Banana , Apple, grapes, watermelon, some time they want chees piza also.. So that Tree is and Employee or engineer who is trying to dilever all frouts

@1. Intro .. @2. Java: Immutable ? User Defined Immutable Class? @3 Shallow Cloning . @4 Hierarchy of Thread @5. Use of wait() .... Notify... @6. Sleep ? ...... Use of Join().. How do you control the Thread ? @7. What is .... & . ConcurrentHashMap. @8. ConcurrentHashMap vs HashTable @9. G.C ? Where it is stored ?,,,, @10 .New Features of Java.8. Default Method ? @11 Singleton Class ? @12. What all things you take care to IMPL Singleton.. @14. How do you avoid Clone ? Ans. overide .... Is there any other way to break it ? @15 . Serialization and Deserialization - There is Issue Right ? We have to maintain single Object @16 . Design Patterns ? Factory DP ? Loose Couple Purpose @17.. @18. DI. @19. Types of DI ? @19. ? @20. interfaces @21

This was the toughest interview i had ever seen. I almost died after listening to the interview questions, thank god to doctors who recovered me.

I also once had multiple rounds of interviews with HCL and it was very lengthy, this interview was not too easy but not too tough as well. Some of the questions were specifically to your project related technology like kafka but overall your interview was good 👍

Mansi developers don't have to know everything as there are other groups like Devops and Integration teams who are hired to do their job. If you are not comfortable with that skill just don't mention that or even try to attempt answering those which are not in your comfort zone. The JD that is given to you before interview should be referred. However once you get a chance you can upgrade yourself. Eg Kubernetes, AWS, Docker, Nginx, Istio etc

Do more latest videos, Thanks u so much

Can u upload real time programming

such a theoritical interview

Where are you placed now Mansi ?

Its look like 8 years of Experience interview going on, definitely it's not for 5 years and that too in HCL

Logging kibana or logstash?

Listening. No questions on how you configured Kafka on Production? How many Partitions were configured? How many messages processed per sec? How many Kafka topics used? Without screen share it's difficult to understand what you are writing

It's a very easy interview

maine full stack java developer ka course kiya hai kya mujhe full stack java developer ke jagah core java developer ki job milegi kya???

typical desi interviewer in USA for service based company.

Basically basically actually actually … uff😫😫

This was the real-time interview that you had recorded?

lol all this in the interview and the day to day task are literally if else and loops. maybe lists and maps.

One day,I will marry this girl.. before people get enraged.. I only mean it as a compliment.. 😀

Girl knows so much theory but can't reverse a linked list.

Too much for a 5 yr exp. candidate

CTC offered???

'basically' was really irritatng

Typical service based interview. Same core Java questions are being asked from last 15 years.

YOE?

You selected or not?