Part 6 - Graph Databases

Question 1

What is a node in a GDB

Answer 1

The main data element from which graphs are constructed

Question 2

What is the link between two nodes called?

Answer 2

Relationship. Can contain metadata, for example “relationship type”

Question 3

What is a graph?

Answer 3

A graph is a data model consisting of a set of nodes linked by relationships

Question 4

What is the problem with RDBMS, and how does the GDB approach fix this problem

Answer 4

RDBMS is very inefficient in traversal. GDB uses index free adjacency by using pointers instead of keys and lookup tables

Question 5

What does ACID stand for in GDB? Why is it important?

Answer 5

• Atomic
• Consistent
• Isolated
• Durable
  Transactional consistency - all updates either succeed or fail

Question 6

From the following Cypher line, identify the nodes and relationship metadata:
(A)-[:LIKES]->(B)

Answer 6

Nodes: A & B

Relationship metadata: LIKES