Tell us about specific results and achievements in numbers.
Senior
178
Java
14849
265
What is the difference between dirty read anomalies and non-repeatable read?
Senior
178
[Name] mentioned that they came to Lepton for growth opportunities and transparent development. Why did they not transfer to another project within the company after completing the project?
Senior
178
How to ensure reliability when paying for a mobile phone (deduction on our side + charging at MTS)?
178
How do you set a pessimistic lock on a JPA repository method without native SQL?
Senior
178
How to implement hashCode() for a Long type (64 bits) to return an int (32 bits)?
Senior
178
What is the relationship between topic and partition in Kafka?
Senior
178
What is the main difference between ForkJoinPool and other pools, and what mechanism does it use?
178
What is Kafka Streams and what is it used for?
Senior
178
There are 3 entities - user, chat, message - User has a name and registration date - Chat has a name and creation date - Message has text, author, and creation date - User can be in multiple chats simultaneously - Message must belong to a chat, and cannot belong to more than one chat at the same time - Describe the domain in the form of tables.
Senior
178
How does deployment to production happen? How is CI/CD structured?
Middle+
178
How does @Transactional work? What happens when a transactional method is called from within the same class?
Senior
178
Problem statement: Given an array of integers nums and an integer target, find two numbers in the array that sum up to target and return their indices. It is guaranteed that there is exactly one solution, and the same element cannot be used twice. Examples: Input: nums = [2,7,11,15], target = 9 Output: [0,1]. Explanation: nums[0] + nums[1] = 2 + 7 = 9 Input: nums = [3,2,4], target = 6 Output: [1,2]. Explanation: nums[1] + nums[2] = 2 + 4 = 6 Input: nums = [3,3], target = 6 Output: [0,1]. Explanation: nums[0] + nums[1] = 3 + 3 = 6
Senior
178
Is there experience supporting a project in production? Incident analysis, monitoring with graphs, logs.
Senior
178
Are indexes needed in this task and on which fields? What indexes are created by default? From which version of PostgreSQL is an index on foreign keys automatically created?
Senior
178
What other problems are there in the code? (SecurityContextHolder, personal data, financial calculations)
Senior
178
Why are Kafka and message brokers in general needed?
Middle+
177
What criteria are important to you when choosing a new project or team?
Senior
177
What types of transaction isolation are available in Transaction Manager?
Senior
177
Do you have any preferences for a new workplace — hardware, software, directions?
Senior
177