Which of the following database engines is primarily a non-relational (NoSQL) key-value...
Accenture technical mcq question, verified with a worked answer. Free to practise - no sign-up.
Which of the following database engines is primarily a non-relational (NoSQL) key-value data store?
Show answer & explanation
Redis is an in-memory, non-relational key-value store optimized for fast data access and caching, whereas MySQL, PostgreSQL, and SQLite are all relational database management systems (RDBMS) that use structured schemas and SQL queries.
Step-by-step Derivation:
Classify each option: A) MySQL—RDBMS using SQL and tables. B) Redis—NoSQL key-value store, data stored as key-value pairs in memory. C) PostgreSQL—RDBMS using SQL and relational schema. D) SQLite—RDBMS using SQL and file-based tables. Only Redis fits the definition of a non-relational key-value data store.