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CPS 847 > Mongo DB 6 > Flashcards

Mongo DB 6 Flashcards

1
Q

Which command is used to create a new MongoDB database?
A. new db
B. create db
C. use mydb
D. db.create()

A

C. use mydb

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2
Q

How do you insert a single document into MongoDB?
A. insertOne()
B. put()
C. insert()
D. addDocument()

A

A. insertOne()

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3
Q

Which MongoDB command removes all documents from a collection?
A. db.removeAll()
B. db.clear()
C. db.q.deleteMany({})
D. db.dropAll()

A

C. db.q.deleteMany({})

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4
Q

What is the equivalent of a SQL table in MongoDB?
A. Database
B. Row
C. Collection
D. Schema

A

C. Collection

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5
Q

Which command in MongoDB selects all documents?
A. db.q.findAll()
B. db.q.selectAll()
C. db.q.find()
D. db.q.get()

A

C. db.q.find()

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6
Q

In MongoDB, what does $regex operator do?
A. Sort
B. Count
C. Pattern match
D. Group

A

C. Pattern match

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7
Q

Which field is automatically used as a primary key in MongoDB?
A. id
B. key
C. _id
D. pk

A

C. _id

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8
Q

Which operation in MongoDB is equivalent to SQL GROUP BY?
A. $group
B. $sum
C. $match
D. $join

A

A. $group

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9
Q

What does the MongoDB $lookup operator perform?
A. Sorting
B. Indexing
C. Joins
D. Projection

A

C. Joins

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10
Q

How do you replace a document in MongoDB?
A. updateMany()
B. replaceOne()
C. insert()
D. deleteOne()

A

B. replaceOne()

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11
Q

What is Big Data?
A. Small structured data
B. Data stored in RAM
C. Voluminous and complex data
D. Tabular data

A

C. Voluminous and complex data

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12
Q

Which of the following is NOT one of the 4 V’s of Big Data?
A. Volume
B. Variety
C. Value
D. Variance

A

D. Variance

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13
Q

Which NoSQL database type uses JSON-like structure?
A. Key-Value
B. Graph
C. Document
D. Column

A

C. Document

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14
Q

Which storage type is optimized for analytics?
A. Row-oriented
B. Columnar
C. Relational
D. Object

A

B. Columnar

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15
Q

What does ACID stand for in databases?
A. Atomicity, Consistency, Isolation, Durability
B. Analytics, Control, Isolation, Durability
C. Aggregation, Configuration, Integrity, Data
D. Access, Consistency, Info, Duration

A

A. Atomicity, Consistency, Isolation, Durability

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16
Q

Which NoSQL type models data using edges and nodes?
A. Document
B. Graph
C. Column
D. Key-Value

A

B. Graph

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17
Q

Which system is an example of a NewSQL database?
A. MongoDB
B. SAP HANA
C. Redis
D. Cassandra

A

B. SAP HANA

18
Q

What is the main advantage of in-memory databases?
A. Low disk usage
B. Speed
C. Better storage
D. Backup capability

19
Q

What is the CAP theorem?
A. Theory of relational DB
B. Storage optimization
C. Trade-off between Consistency, Availability, and Partition Tolerance
D. NoSQL versioning rule

A

C. Trade-off between Consistency, Availability, and Partition Tolerance

20
Q

Which of the following describes BASE in NoSQL?
A. Basic Atomic Schema Extension
B. Basically Available, Soft state, Eventual consistency
C. Binary Abstract Storage Engine
D. Best Approximate Structural Efficiency

A

B. Basically Available, Soft state, Eventual consistency

21
Q

Which command is used to create a new MongoDB database (variant)?
A. new db
B. create db
C. use mydb
D. db.create()

A

C. use mydb

22
Q

How do you insert a single document into MongoDB (variant)?
A. insertOne()
B. put()
C. insert()
D. addDocument()

A

A. insertOne()

23
Q

Which MongoDB command removes all documents from a collection (variant)?
A. db.removeAll()
B. db.clear()
C. db.q.deleteMany({})
D. db.dropAll()

A

C. db.q.deleteMany({})

24
Q

What is the equivalent of a SQL table in MongoDB (variant)?
A. Database
B. Row
C. Collection
D. Schema

A

C. Collection

25
Q

Which command in MongoDB selects all documents (variant)?
A. db.q.findAll()
B. db.q.selectAll()
C. db.q.find()
D. db.q.get()

A

C. db.q.find()

26
Q

In MongoDB, what does $regex operator do (variant)?
A. Sort
B. Count
C. Pattern match
D. Group

A

C. Pattern match

27
Q

Which field is automatically used as a primary key in MongoDB (variant)?
A. id
B. key
C. _id
D. pk

28
Q

Which operation in MongoDB is equivalent to SQL GROUP BY (variant)?
A. $group
B. $sum
C. $match
D. $join

29
Q

What does the MongoDB $lookup operator perform (variant)?
A. Sorting
B. Indexing
C. Joins
D. Projection

30
Q

How do you replace a document in MongoDB (variant)?
A. updateMany()
B. replaceOne()
C. insert()
D. deleteOne()

A

B. replaceOne()

31
Q

What is Big Data (variant)?
A. Small structured data
B. Data stored in RAM
C. Voluminous and complex data
D. Tabular data

A

C. Voluminous and complex data

32
Q

Which of the following is NOT one of the 4 V’s of Big Data (variant)?
A. Volume
B. Variety
C. Value
D. Variance

A

D. Variance

33
Q

Which NoSQL database type uses JSON-like structure (variant)?
A. Key-Value
B. Graph
C. Document
D. Column

A

C. Document

34
Q

Which storage type is optimized for analytics (variant)?
A. Row-oriented
B. Columnar
C. Relational
D. Object

A

B. Columnar

35
Q

What does ACID stand for in databases (variant)?
A. Atomicity, Consistency, Isolation, Durability
B. Analytics, Control, Isolation, Durability
C. Aggregation, Configuration, Integrity, Data
D. Access, Consistency, Info, Duration

A

A. Atomicity, Consistency, Isolation, Durability

36
Q

Which NoSQL type models data using edges and nodes (variant)?
A. Document
B. Graph
C. Column
D. Key-Value

37
Q

Which system is an example of a NewSQL database (variant)?
A. MongoDB
B. SAP HANA
C. Redis
D. Cassandra

A

B. SAP HANA

38
Q

What is the main advantage of in-memory databases (variant)?
A. Low disk usage
B. Speed
C. Better storage
D. Backup capability

39
Q

What is the CAP theorem (variant)?
A. Theory of relational DB
B. Storage optimization
C. Trade-off between Consistency, Availability, and Partition Tolerance
D. NoSQL versioning rule

A

C. Trade-off between Consistency, Availability, and Partition Tolerance

40
Q

Which of the following describes BASE in NoSQL (variant)?
A. Basic Atomic Schema Extension
B. Basically Available, Soft state, Eventual consistency
C. Binary Abstract Storage Engine
D. Best Approximate Structural Efficiency

A

B. Basically Available, Soft state, Eventual consistency

CPS 847 (8 decks)

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