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Databases

Deadlock

Two transactions each holding a lock the other needs, so neither can proceed.

Why interviewers ask about it

The systematic prevention is a consistent global lock ordering, which makes a wait-for cycle impossible. Beyond that: short transactions and retry logic.

Isolation level

How much concurrent transactions can see of each other: READ UNCOMMITTED, READ COMMITTED, REPEATABLE READ, SERIALIZABLE.

This term is part of the free Python Full-Stack interview preparation module - browse the full glossary for every definition.

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Why interviewers ask about it

Related terms

Isolation level

Why interviewers ask about it

Related terms

Isolation level