Match each AWS database service to its primary use case.
Drag a concept onto its matching description — or click a concept then click the description.
Relational database with managed operations
NoSQL key-value and document database
In-memory caching for low latency
Graph database for connected data
Time-series data for IoT and analytics
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Amazon RDS: Relational database for online transaction processing (OLTP) workloads.
Correct matches: RDS -> OLTP relational, DynamoDB -> NoSQL low-latency, Redshift -> data warehousing, ElastiCache -> in-memory caching. Common confusions include swapping RDS and DynamoDB use cases.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
Amazon RDS: Relational database for online transaction processing (OLTP) workloads.
Why this is correct
Amazon RDS is a managed relational database service ideal for OLTP workloads such as e-commerce sites and CRM systems.
Amazon DynamoDB: NoSQL key-value and document database for low-latency, high-traffic applications.
Why this is correct
DynamoDB is a fully managed NoSQL database providing single-digit millisecond latency at any scale, suitable for gaming, ad tech, and IoT.
Amazon Redshift: Petabyte-scale data warehouse for running complex analytical queries.
Why this is correct
Redshift is a fast, petabyte-scale data warehouse that enables running complex analytic queries across large datasets.
Amazon ElastiCache: In-memory caching service for improving application performance.
Why this is correct
ElastiCache offers managed Redis or Memcached, used for caching, session management, and real-time analytics.
Amazon RDS: NoSQL key-value database for low-latency applications.
Why it's wrong here
Incorrect — Amazon RDS is a relational database, not NoSQL. This describes Amazon DynamoDB.
Amazon DynamoDB: Relational database for OLTP workloads.
Why it's wrong here
Incorrect — DynamoDB is a NoSQL database, not relational. This describes Amazon RDS.
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About these practice questions
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This DEA-C01 practice question is part of Courseiva's free Amazon Web Services certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the DEA-C01 exam.