Database Structure Types DS0-001 Practice Questions (Page 4)

Questions 16–20

1. 16expert · hard

   A multinational company is designing a global user profile service. They need to store user profiles that are read frequently from multiple regions. They also need to support occasional updates. The team is debating between a relational database with read replicas and a NoSQL database with multi-region replication. Which consideration is most important when choosing between these options?

   • ARelational databases cannot scale horizontally, so NoSQL is the only option for global scale.
   • BNoSQL databases always provide lower latency than relational databases.
   • CNoSQL databases do not support multi-region replication.
   • DThe relational database can provide strong consistency across all replicas, while NoSQL typically offers eventual consistency.
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2. 17foundation · easy

   Which of the following is a key feature of MongoDB?

   • AIt is primarily used for graph-based data
   • BIt supports horizontal scaling through sharding
   • CIt is a relational database management system
   • DIt enforces a strict schema on all documents in a collection
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4. 18application · medium

   A content management system stores articles, each with a title, author, body, tags, and an array of comments. The number of comments per article varies widely, and the development team wants to store the entire article including its comments as a single record to avoid joins. Which database is best suited for this requirement?

   • AMySQL
   • BCassandra
   • CNeo4j
   • DMongoDB
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5. 19foundation · easy

   What is the primary data structure used by MongoDB to store data?

   • AKey-value pairs
   • BDocuments in BSON format
   • CTables with rows and columns
   • DNodes and edges
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6. 20application · medium

   A company is building a product catalog for an e-commerce site. Each product has a different set of attributes (e.g., a laptop has RAM, a shirt has size). The team wants to store products without defining a fixed schema. They also need to support filtering by attribute values. Which database is best suited?

   • AMySQL with a wide table of nullable columns
   • BMongoDB with a flexible document schema
   • CCassandra with a fixed column family
   • DNeo4j with product nodes and attribute edges
   Reveal Solution Discussion Select an answer first