18 real NoSQL Types questions from the NoSQL bank, as asked in Indian campus drives and tech interviews. Every question has a verified answer and an AI-tutor explanation on placd — free to start.
1. What is Document store?
Junior
A.a database that keeps semi-structured records as self-describing JSON-like objects, such as MongoDB
B.a wide-row model that groups related columns and supports millions of dynamic columns per row, as in Cassandra and HBase
C.a system optimized for storing nodes and the edges between them so relationship traversals are first-class, such as Neo4j
D.a family of non-relational stores that relax fixed table schemas and SQL joins in favor of flexible models and horizontal scale
A.Document store — the simplest model, mapping an opaque identifier directly to a blob of bytes with no query over the value, as in Redis
B.Document store — an engine that supports several data paradigms such as document, graph, and key-value within one product, like ArangoDB or Cosmos DB
C.Document store — a database that keeps semi-structured records as self-describing JSON-like objects, such as MongoDB
D.Document store — a system optimized for storing nodes and the edges between them so relationship traversals are first-class, such as Neo4j
A.Key-value store — an engine that supports several data paradigms such as document, graph, and key-value within one product, like ArangoDB or Cosmos DB
B.Key-value store — a database that keeps semi-structured records as self-describing JSON-like objects, such as MongoDB
C.Key-value store — a family of non-relational stores that relax fixed table schemas and SQL joins in favor of flexible models and horizontal scale
D.Key-value store — the simplest model, mapping an opaque identifier directly to a blob of bytes with no query over the value, as in Redis
A.Column-family store — a database that keeps semi-structured records as self-describing JSON-like objects, such as MongoDB
B.Column-family store — a family of non-relational stores that relax fixed table schemas and SQL joins in favor of flexible models and horizontal scale
C.Column-family store — a system optimized for storing nodes and the edges between them so relationship traversals are first-class, such as Neo4j
D.Column-family store — a wide-row model that groups related columns and supports millions of dynamic columns per row, as in Cassandra and HBase
A.Graph database — a system optimized for storing nodes and the edges between them so relationship traversals are first-class, such as Neo4j
B.Graph database — the simplest model, mapping an opaque identifier directly to a blob of bytes with no query over the value, as in Redis
C.Graph database — an engine that supports several data paradigms such as document, graph, and key-value within one product, like ArangoDB or Cosmos DB
D.Graph database — a wide-row model that groups related columns and supports millions of dynamic columns per row, as in Cassandra and HBase
14. Which term means: "a family of non-relational stores that relax fixed table schemas and SQL joins in favor of flexible models and horizontal scale"?
17. Which term means: "an engine that supports several data paradigms such as document, graph, and key-value within one product, like ArangoDB or Cosmos DB"?
A.Multi-model database — a system optimized for storing nodes and the edges between them so relationship traversals are first-class, such as Neo4j
B.Multi-model database — an engine that supports several data paradigms such as document, graph, and key-value within one product, like ArangoDB or Cosmos DB
C.Multi-model database — the simplest model, mapping an opaque identifier directly to a blob of bytes with no query over the value, as in Redis
D.Multi-model database — a family of non-relational stores that relax fixed table schemas and SQL joins in favor of flexible models and horizontal scale
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