Java Interview| 9+ years experience| Real time Java Microservices Interview.#Cognizant,#tcs,#infosys

This is a recording of an actual interview discussion that I was part of.

This video talks about Java, Microservices, and Spring boot interview questions and Spring boot basic features through these interview questions.

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[deepakall]

1. Why we use lambda expression?
2. Where do we use method reference
3. Filter a list of elements - how do we do?
4. What are the major collections used
5. Stream Vs Parallel stream
6. Does streaming has any correlation with the cores
7. If we are reading from a list and if we are writing from the list to another list, can we use parallel stream in that case
8. Runnable Vs Callable
9. Futures
10. Different ways to create multiple threads
11. After all tasks are finished in executor service, you need to execute something in the main thread. How will you do it?
12. Need for micro-services, diff between monolithic and micro-services
13. Design of MS in the project
14. Eureka service and it's usage
15. API gateway usage
16. Handling security stuffs in MS
17. How do you communicate between the services in your application - Feign client
18. How to enable Eureka server and register the clients
19. Annotations used in spring boot
20. Caching annotations
22. Different bean scope
23. Singleton pattern
24. Prototype pattern
25. Basic Kafka setup
26. What's the basic adv of Kafka over other messaging queues
27. Consumer groups in Kafka
28. If 2 consumers are part of a consumer group, both the consumers will get the same message or only either of them will get the same message
29. What happens if 2 consumers belong to different consumer groups
30. Concept of sharding
31. How do we shard the data? What's shard key?
32. SQL Vs no SQL database
33. You have an array of 0's and 1's. Segregate them such that 0's are at left and 1's at right.
34. How 33 can be done in min time. Pick an algorithm.

[gsaravanan]

00:58 -
01:42 -
02:17 -
1. Why we use lambda expression?
2. Where do we use method reference
3. Filter a list of elements - how do we do? 03:45

[swarupcodes]

It's really true that number of experience is inversely proportional to the coding efficiency.

[saalikkhan]

For those looking for answers of the Algo question. Its simple in-place algo (You can say its a simple swapping the numbers algo).
int[] intArr = {0, 1, 0, 1, 0, 0, 1, 0, 1, 0};
int j = 0;
for(int i =0; i<intArr.length; i++){
if(intArr[i] > 0){
int temp = intArr[j];
intArr[j] = intArr[i];
intArr[i] = temp;
j++;
}
}

[anantdixit]

Thanks for sharing live interview.. It was worth watching.. I am working on similar tech stack close to 6 yrs exp in java backend and looking for new opportunities.. let me know if still there are any openings.. awaiting for more similar videos..

[adityashankar]

Sir thanks for sharing the interview experience it will help us a lot

[aman]

For the algo question answer, i don't remember if the panelists asked NOT TO USE any inbuilt methods. If they said so then pardon i am sorry.

In that Case ONLY ONE LINE CODE WILL DO:-

int ar[]={0, 0, 1, 1, 0, 1, 1, 0, 0, 0, 0, 1, 0, 0};

Arrays.sort(ar);

for(int i=0;i<ar.length;i++)
sop(ar[i]+", ");

[vivekpanday]

Ashwin was already impressed and decided him to select 👍🎈

[samanthafox]

these are very basic questions for a 9 YOE. why is he holding that speaker part in front of his mouth? cant figure out if he is talking or not

[surya]

Hi sir, if there are any openings. please let me know

[harshapasumarthi]

Bro does any coupons working to get databricks course?
Please let me know

[JangBahadur]

I would reject this candidate as per his this interview.