ITPEC FE Morning April 2021 Question 29
ITPEC FE Morning April 2021 — Question 29 of 80
Key-Value Store — a NoSQL database that stores data as unique key-value pairs for fast retrieval.
A key-value store saves data together with a key that uniquely identifies each entry, forming a pair.
NoSQL database types (one per answer choice):
- (a) Relational DB — two-dimensional tables with rows and columns based on set theory
- (b) Graph DB — nodes, relationships, and properties (e.g., Neo4j)
- (c) Key-Value Store — data stored as uniquely identified key-value pairs (e.g., Redis, DynamoDB) ✔
- (d) Document Store — flexible, schema-free documents (e.g., MongoDB)
Key rule: Key-value stores provide the simplest NoSQL model — a unique key maps directly to a value, enabling extremely fast lookups.
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