Neo4J Interview Questions and Answers
Question - 11 : - What are the types of Object Cache in Neo4J?
Answer - 11 : - There are two types of Object Cache which can also referred as High Level Cache:
• Reference Cache
• High-Performance Cache(HPC)
Question - 12 : - Explain Neo4j.
Answer - 12 : -
Neo4J is a NoSQL, schema-free, open-source, popular graph database. It is the world's leading open-source graph database.
Question - 13 : - Why Neo4J is called graph database?
Answer - 13 : -
Neo4J is called graph database because it stores data structure in graph instead of in tables.
Question - 14 : - In which language Neo4G is written?
Answer - 14 : -
Neo4J is written and implemented in Java language.
Question - 15 : - Which query language is used by Neo4J?
Answer - 15 : -
Cypher Query Language (CQL) is used by Neo4J.
Question - 16 : - Which was the Neo4J first version and when was it released?
Answer - 16 : -
The first version of Neo4J was Neo4j 1.0 and it was released in Feb, 2010.
Question - 17 : - Why is Neo4J used?
Answer - 17 : -
Neo4J is mainly used for:
- Real time data analysis
- Knowledge graph
- Network and IT operations
- Real-time recommendation engines
- Data management
- Identity and Access management
- Social Network
- Privacy and Risk management
Question - 18 : - What is the role of building blocks like Nodes, Relationships, Properties and Labels in Neo4J?
Answer - 18 : -
Roles of building blocks:
- Nodes: They are entities equivalent to rows in table.
- Relationship: It connects entities and structure domain.
- Properties: It contains meta-data and attributes.
- Labels: It groups nodes by role.
Question - 19 : - Which are the several popular Graph Databases?
Answer - 19 : -
Neo4J is a very popular Graph Database. Other Graph Databases are Oracle NoSQL Database, OrientDB, HypherGraphDB, GraphBase, InfiniteGraph, AllegroGraph etc.
Question - 20 : - Explain some features of Neo4J.
Answer - 20 : -
Neo4J supports UNIQUE constraints.
- Neo4J uses Native graph storage with Native GPE(Graph Processing Engine).
- Neo4J supports exporting of query data to JSON and XLS format.
- Neo4J provides REST API to be accessed by any Programming Language like Java, Spring, Scala etc.
- Neo4J provides Java Script to be accessed by any UI MVC Framework like Node JS.
- Neo4J supports two kinds of Java API: Cypher API and Native Java API to develop Java applications.