DS0-001 · Question #60
DS0-001 Question #60: Real Exam Question with Answer & Explanation
The correct answer is B: Unstructured data. Non-relational (NoSQL) databases are specifically designed to handle unstructured or semi-structured data - such as documents, key-value pairs, graphs, or wide columns - making B the defining characteristic that sets them apart from relational systems. Why the distractors are wro
Question
Which of the following is a characteristic of all non-relational databases?
Options
- AColumns with the same data type
- BUnstructured data
- CLogical record groupings
- DTabular schema
Explanation
Non-relational (NoSQL) databases are specifically designed to handle unstructured or semi-structured data - such as documents, key-value pairs, graphs, or wide columns - making B the defining characteristic that sets them apart from relational systems.
Why the distractors are wrong:
- A (Columns with the same data type): This describes relational databases, where each column enforces a specific data type across all rows. NoSQL databases often have no concept of columns at all.
- C (Logical record groupings): Tables in relational databases logically group records by schema; NoSQL databases may organize data as collections, nodes, or blobs - not necessarily "logical groups" in the relational sense.
- D (Tabular schema): A fixed tabular (rows and columns) schema is the hallmark of relational databases like SQL. Non-relational databases are explicitly schema-flexible or schema-free.
Memory tip: Think "NoSQL = No Structure Required." The whole point of going non-relational is to escape the rigid table structure, so unstructured data is the one trait they all share.
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