Big Data Analytics (2180710) MCQs

MCQs of Data Base for the Modern Web

Showing 11 to 20 out of 27 Questions
1 2 3
11.
After starting the mongo shell, your session will use the ________ database by default.
(a) mongo
(b) master
(c) test
(d) primary
Answer:

Option (c)

12.
Which of the following operation is used to switch to a new database mydb?
(a) use dbs
(b) use db
(c) use mydb
(d) use mydbs
Answer:

Option (c)

13.
Which of the following method is used to query documents in collections?
(a) find
(b) move
(c) shell
(d) replace
Answer:

Option (a)

14.
What is the maximum size of a MongoDB document?
(a) 2 MB
(b) 16 MB
(c) 12 MB
(d) There is no maximum size. It depends on the RAM.
Answer:

Option (b)

15.
What is the equivalent command in MongoDB for the following SQL query? SELECT * FROM posts WHERE author like "%john%"
(a) db.posts.find( { author: /john/ } )
(b) db.posts.find( { author: {$like: /john/} } )
(c) db.posts.find( { $like: {author: /john/} } )
(d) db.posts.find( { author: /^john^/ } )
Answer:

Option (a)

16.
In MongoDB, _________ operations modify the data of a single collection.
(a) CRUD
(b) GRID
(c) READ
(d) All of the mentioned
Answer:

Option (a)

17.
Which of the following method returns true if the cursor has documents?
(a) hasMethod()
(b) hasNext()
(c) hasDoc()
(d) All of the mentioned
Answer:

Option (b)

18.
Which of the following method is called while accessing documents using the array index notation?
(a) cur.toArray()
(b) cursor.toArray()
(c) doc.toArray()
(d) All of the mentioned
Answer:

Option (b)

19.
Which of the following method returns one document?
(a) findOne()
(b) findOne1()
(c) selectOne()
(d) All of the mentioned
Answer:

Option (a)

20.
The ________ message is used to update a document in a collection.
(a) UPDATE
(b) OP_UPDATE
(c) OP_UPDATES
(d) All of the mentioned
Answer:

Option (b)

Showing 11 to 20 out of 27 Questions
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