Neo4j Interview Questions and Answers
Experienced / Expert level questions & answers
Ques 1. How does Neo4j ensure data consistency in a distributed environment?
Neo4j uses the Raft consensus algorithm to achieve distributed consensus and ensure data consistency in a distributed environment.
Ques 2. What is the purpose of the APOC (Awesome Procedures on Cypher) library in Neo4j?
APOC is a library of useful procedures and functions for Cypher that extends the functionality of Neo4j. It provides additional features and utilities for advanced graph processing.
Ques 3. Explain the concept of a Neo4j transaction event.
A Neo4j transaction event is a mechanism that allows users to subscribe to events that occur during transactions. It enables custom logic to be executed in response to specific database changes.
Ques 4. Explain the concept of a graph kernel in Neo4j.
A graph kernel in Neo4j is a set of algorithms that operate on the graph structure. It allows users to perform advanced graph analysis and extract relevant patterns from the data.
Ques 5. How does Neo4j handle transaction isolation levels?
Neo4j supports multiple transaction isolation levels, including READ UNCOMMITTED, READ COMMITTED, REPEATABLE READ, and SERIALIZABLE. Users can choose the appropriate level based on their requirements.
Ques 6. What is the role of the Neo4j Causal Clustering architecture?
Causal Clustering in Neo4j is an architecture that supports high availability and fault tolerance. It uses a cluster of servers with a consensus algorithm to ensure data consistency.
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