Unit 14

Question 1

are designed to break away from the rows and columns of the relational database model.

Answer 1

NoSQL database

Question 2

A useful description of how the data will be organized is the beginning of a schema.

Answer 2

NoSQL database

Question 3

have had generations of users and developers to work out standard design methods.

Answer 3

Relational database

Question 4

A database schemas are much less costly to revise.

Answer 4

NoSQL database

Question 5

How often will data and documents be updated?

Answer 5

may update thousands of times per day

Question 6

Each document stores pairs of fields and values, with a wide variety of data types and data structures being used as values.

Answer 6

Document databases

Question 7

The data model consists of two parts: a string with some relationship to the data, such as a filename or URL, which is used as the key, and the data, which is treated as a single collection.

Answer 7

Key-value database

Question 8

stores use a table form but in a flexible and scalable way.

Answer 8

Wide-column

Question 8

consists of a key and a value, making this the simplest type of database

Answer 8

Key-value database

Question 9

consist of nodes connected by edges. Data items like names, prices, and products are stored in the nodes, while the edges store information about how the nodes are related

Answer 9

Graph databases

Question 10

store data in the document data type, which is similar to a JSON document or object.

Answer 10

Document databases

Question 11

What they have in common is that the _______________ will be distributed and horizontally partitioned.

Answer 11

physical storage

Question 12

What are NoSQL covers four main types of database design

Answer 12

Document databases, Graph databases, Wide-column,
Key-value database

Question 13

Does NoSQL have a schema?

Answer 13

false

Question 14

Does NoSQL have a query language?

Answer 14

true

Question 15

stores documents on disk in the BSON serialization format.

Answer 15

MongoDB

Question 16

The mongo JavaScript shell and the MongoDB language drivers translate between ____ and the language-specific document representation.

Answer 16

BSON

Question 17

Default database of MongoDB is ‘__’, which is stored within data folder.

Answer 17

db

Question 18

command provides you with a list of all the databases.

Answer 18

show dbds

Question 19

A database name can contain

Answer 19

$

Question 20

use JSON (JavaScript Object Notation, is a lightweight, thoroughly explorable format used to interchange data between various applications) style for storing data.

Answer 20

Document

Question 21

An entity which can be used in programming. May be a value, variable, function, or data structure.

Answer 21

object

Question 22

may store documents those who are not same in structure. This is possible because MongoDB is a Schema-free database.

Answer 22

Collection

Question 23

A Collection name must not exceed ___ characters. It will be nice if you keep it within _____ characters.

Answer 23

128 & 80/90

Question 24

are collections which can store data in the same order it is inserted.

Answer 24

Capped collections

Question 25

Information about a database is stored in certain collections

Answer 25

Metadata

Question 26

MongoDB Create Database command

Answer 26

use DATABASE_NAME

Question 27

drop Database command

Answer 27

db.dropDatabase()

Question 28

MongoDB Create Collection command

Answer 28

db.createCollection(name, options)

Question 29

MongoDB Drop collection command

Answer 29

db.COLLECTION_NAME.drop()

Question 30

check the collections command

Answer 30

show collections