Golang

How much load can PostgreSQL withstand?

Can you explain what is meant by a Linter tool in the context of code development?

Junior — Middle

Mail.ruLamoda Tech

Transaction: transaction_id uuid identotency_id uuid from_account_id uuid to_account_id uuid amoun decimal status enum transaction_start timestamp transaction_end timestamp payments_create: user_id uuid payment_account_id uuid balance decimal currency varchar(16) status ENUM created_time timestamp update_time timestamp

What does the At-Most-Once message processing mode mean and how does it differ from At-Least-Once?

How can transactions lead to mutual locking in a database?

What methods can be used to detect data race conditions in a multithreaded environment?

Can you explain the principle of the Repeatable Read transaction isolation level in databases?

What is the difference between a goroutine and threads in terms of execution and performance?

Is absolute message delivery guaranteed in Kafka, and how is it achieved?

What is the main role and application of mock objects in testing?

What tools do you use for debugging and error fixing in code?

How does the mechanism of writing to a restricted access channel work and what happens during this process?

Junior — Middle

Магнит ТехКасперскийWildberries+5

What types of indexing in databases have you used, and for which scenarios were they most effective?

Can you list the main types of communication channels used for data transfer?

Junior — Middle

WildberriesLamoda TechСамокат Тех+4

Can you explain the mechanism of adding an element to the end of a data structure, such as a list or array?

How can you efficiently launch and manage a large number of goroutines, for example, around 100,000?

Can you list the main types of contexts used in programming or system design?

Explain the concept of a composite index and its application in databases.

Junior — Middle

МТСМТС DigitalLamoda Tech

Can you explain what the context.WithValue function in Go is used for and how it works?

How does a goroutine interact with the system execution thread in an operating system?