Java

Colors appearing an odd number of times

Creating a thread-safe REST service for managing user posts

Converting a string into a set of key-value pairs

Selection of usernames who worked for more than three companies

Junior — Senior

СБЕР Страхование

Determine the number of words in a line in one pass

Investigation of Stream.peek() behavior with lazy execution in Java

Junior — Senior

РЖД

What does the greeting method output and how does the return operator work in a void method

Differences between checked and unchecked exceptions in Java

Forming list B from list A with field selection and transformation

Junior — Middle+

Диасофт

Exception behavior: order of execution of try‑catch‑finally blocks

Guaranteeing the uniqueness of objects in HashSet

Invert the order of words in the sentence

Employees without assigned department

Determining the type of association between JPA entities A and B

Determining the strongest password for each user

Counting occurrences of the digit 1 in the range from 0 to N

Finding the majority element in an array

FizzBuzz: creating a byte array from a given number

Creating a service to identify inactive clients

Checking the possibility of converting a string in a single edit

Junior — Senior

МТС