Which of the following is/are correct about graph databases?Question 3Select one or more:Select one or more:a.Graph databases may have better performance than relational databases for certain kinds of queries.b.Cypher is Neo4j's query language, which is declarative.c.In Neo4j, a node may have properties, but a relationship cannot have properties.d.In Neo4j, a node can have zero or many labels, while a relationship can have zero or many types.
Question
Which of the following is/are correct about graph databases?Question 3Select one or more:Select one or more:a.Graph databases may have better performance than relational databases for certain kinds of queries.b.Cypher is Neo4j's query language, which is declarative.c.In Neo4j, a node may have properties, but a relationship cannot have properties.d.In Neo4j, a node can have zero or many labels, while a relationship can have zero or many types.
Solution
The correct answers are:
a. Graph databases may have better performance than relational databases for certain kinds of queries. This is true because graph databases are designed to handle complex relationships between data points, which can be more efficient than relational databases for certain types of queries, especially those involving many-to-many relationships.
b. Cypher is Neo4j's query language, which is declarative. This is also true. Cypher is the query language used by Neo4j, and it is indeed declarative, meaning it focuses on what the data should look like rather than how to achieve it.
c. In Neo4j, a node may have properties, but a relationship cannot have properties. This is false. In Neo4j, both nodes and relationships can have properties. This allows for rich, detailed data modeling.
d. In Neo4j, a node can have zero or many labels, while a relationship can have zero or many types. This is true. In Neo4j, a node can have any number of labels, and a relationship can have any number
Similar Questions
In relation to a Graph Database which of the following are correct?试题 5选择一项或多项：a.Compared with key-value data stores, graph databases generally have more complex data models but are less scalable.b.Neo4j does not support the join operation.c.In a graph database we represent data in terms of graphs having two fundamental units being nodes and relationships and while noes may have properties relationships are not allowed to have properties. d.Graph databases can navigate through graphs to answer queries, and thus they always provide a better performance for queries than relational databases.
4. Which of the following is true?(a) A graph may contain no edge and many vertices(b) A graph may contain no edges and no vertices(c) A graph may contain no edges and no vertices(d) A graph may contain no vertices and many edges
Which kind of database corresponds to 'graph'?Select one:a.Networkb.Relationalc.Hierarchicald.Object-oriented
Which of them is not a relational database?
Which of the following is/are correct?Question 4Select one or more:Select one or more:a.Some NoSQL databases let the programmer decide the trade-off between scalability and consistency.b.Different NoSQL databases may offer different levels of transaction supports.c.There are no transactions in any NoSQL databases.d.NoSQL databases define isolation levels under the BASE model .
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