Java

[name] asked: What happens to the metrics after Prometheus collects them?

Describe the business process and technical flow in the accrual calculation service.

What tasks are interesting to you?

Middle+

Госуслуги

Have you worked with a microservices architecture?

Middle+

Госуслуги

What was the system load at the time of this incident?

Middle

ООО ИЦ Ай-теко

If an entity is loaded with one request and we call a method to get a related entity — how many total requests will be made?

[name] asked: Why Redis specifically, and not an in-memory cache inside the application?

[name] asked: what is the difference between Factory and Builder patterns?

[name] asked: what databases have you worked with? Postgres, Redis — that's clear, but what about non-relational ones like MongoDB or others?

Question 4. What is JIT compilation? - Compiling code into a jar file - Compiling bytecode into machine code during program execution - Compiling JavaScript into machine code for performance optimization - Compiling a project in a git pipeline

What is @ComponentScan used for?

Senior

IT One

Is it permissible to violate normalization principles? Why?

Name three examples of terminal operations in the Stream API

Senior

Альфа-Банк

What happens when you make an HTTP request from a browser before receiving a response?

What is a race condition? How to deal with it? Provide an example and name the ways to handle it in Java.

Senior

VK

Which framework do you use more?

Middle

ООО ИЦ Ай-теко

How to implement parallel HTTP calls? A request comes in, and you need to call the service for each task in parallel, wait for all responses, and return the result.

Senior

СБЕР

What is the purpose of SELECT FOR UPDATE? What level of locking does it provide? Are there weaker options?

What does the timing of object deletion in such a chain of references depend on?

Middle

ООО ИЦ Ай-теко

[Name] asked: Did you work directly in Sovcombank?

Middle

СБЕР