Is it always necessary to use a microservice architecture? What is it?
Senior
188
Java
14849
265
How do you accept HTTP requests in a Java application? What options are there?
Middle
188
What do we have on hand within the interceptor method? What parameters are available?
Senior
188
How to protect against mutation through getter (returning a copy of the list)?
Senior
188
Explain the concept of strings that cannot be changed after their creation.
Junior — Middle
188
There is a backend and a UI. The stack is standard: Java, Spring, React, Postgres. Task: Design a REST endpoint that needs to fetch data from 3 sources and deliver it to the UI, while ensuring maximum possible throughput and minimal response time (max/min criteria based on our specific conditions, since essentially, there is no silver bullet here and we need to find a compromise). It is known that the expected peak RPS for this REST endpoint will be 200. Details about the sources: 1st source - our database, query takes about 3 seconds. 2nd source - a related REST service, degrades to 2 minutes under 100 RPS, in normal mode responds in 5 seconds. We cannot change the behavior of this source on their side. 3rd source - a related REST service, randomly (no discernible pattern) returns 503, in normal mode response takes 10 seconds. We cannot change the behavior of this source on their side.
Middle+
188
What are the alternatives to Spring that you know?
Senior
188
Tell me about the memory structure in JVM — what are the segments, how does it work?
Senior
188
What is the purpose of using Stream API in repositories?
Middle+
188
Tell us about your last project and what you did there.
Senior
188
Как решить проблему non-repeatable read и дедупликации на стороне консьюмера?
Senior
188
Tell us about transaction isolation levels and the anomalies they address.
Senior
188
Where can a NullPointerException occur in the getTagsOfAuthorsBooks method?
Middle
188
Has there been experience in writing technical documentation, instructions, guides, runbooks?
Senior
188
For what tasks have you used agents according to your experience?
Senior
188
How do you see your role in a team? What is important to you in teamwork?
Senior
188
How do you feel about modifying already completed tasks and refactoring?
Senior
188
Have you used Criteria API and Specification API in JPA? What are they used for?
Senior
188
//Given an array of numbers where all numbers except one have a pair, //find the number that appears only once // // // <= [1, 0, 3, -2, 9, 9, 1, -2, 0] // // => 3 int find(int[] arr){ Map<Integer,
Senior
188
What are your salary expectations?
188