Java

Counting and displaying the number of repetitions of numbers in an array

Retrieving all records from users with more than 500 followers

Junior — Senior

Т-Банк

Definition of mirror symmetry of a binary tree

Validation of transaction list relative to balance

Determining the possibility of transforming a string in a single edit

Junior — Senior

Яндекс

String comparison test using the == operator

The impact of cyclic references on garbage collector performance

Selection of events with unique types

Junior — Senior

IT One

How does comparison of primitive int and Integer object work in Java

Finding the largest element in an array

Filtering, converting to uppercase, and sorting strings

Intern — Middle

IT One

String equality check: value vs reference

Calculation service with transaction and retry logic

Junior — Senior

Альфа-Банк

Early closure of connection before using Stream

Is it possible to obtain a palindrome by permuting the characters of a string

Junior — Senior

Яндекс

Questions of scalability and fault tolerance of a distributed application

Determining the Longest Common Prefix of a String

Definition of Spring Beans for Warehouse and Employee Model

Complete overview of all SQL JOIN options using two tables as an example

Junior — Senior

Формат кода

Asynchronous user data modification