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NoSQL (MESIIN480325)

NoSQL (MESIIN480325)

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Which of these sentences are wrong according to the CAP theorem?

NoSQL databases are able to manage consistency and availability

100%

Relational databases are partition tolerant

100%

NoSQL databases are able to manage partition tolerance and availability

Only one type of database can manage Consistency, Availability and Partition Tolerance

100%

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Give the correspondance for each representation in Cypher

Node

Type

Pattern filtering

Label property

Relationship

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What is the type of consistency management is used for Neo4j?

ACID

85%

Causal

15%

Eventual

Quorum

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Give the correct definition of each server type:

Servers that store data and apply queries

Servers that routes queries and data

Servers that knows the network content and manages it

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What is true according to a Labeled Property Graph Model?

Relationships are named and directed, and eventually have a start and end node

86%

Nodes contain properties

93%

Relationships cannot contain properties

It contains nodes and relationships

93%

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Which clauses are mandatory for search queries in the Cypher language?

ON MERGE

OPTIONAL MATCH

WHERE

RETURN

100%

MATCH

73%

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Graph databases cannot:

Optimize pattern queries

Define a relationship between two or more nodes

88%

Build both oriented and non-oriented relationships

Add labels on relationships

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What cannot be expressed in Cypher?

Do nested queries

pply graph algorithms

20%

Find shortest paths between nodes

Process time series

80%

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Which sentences are true according to elasticsearch?

The number of shards can be changed after indexing

13%

The hash function is elastic and can be changed easily

The hash function is static and based on the number of nodes

13%

By default, a document is replicated twice

80%

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Which sentence is false according to Neo4j?

Cypher the DSL of Neo4j

For each node/relationship/label an index is automatically created

100%

The consistency of a transaction is guarantee

The database stores a relationship with 2 node references but also connects the chain of relationships

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