TK_MMH_MONGODB_3

What is MongoDB Data Modeling?
.
a. We know that MongoDB is a document-oriented database or NoSQL database.
b. We can have documents containing different sets of fields or structures in the same collection.
c. Also, common fields in a collection can contain different types of data. This helps in easy mapping.
d. MongoDB deals in collections, documents, and fields.
e. Unlike the structured database, where we need to determine table's schema in advance, MongoDB is very flexible in this area.
f. It is a schema-less database or we can say, it has a flexible schema.

• A

• C

• D

• E

• F

Point out the correct statement.
.
a. All of the mentioned
b. One-to-One Relationships with document references presents a data model that uses embedded documents to describe one-to-one relationships between connected data
c. One-to-Many Relationships with embedded documents presents a data model that uses embedded documents to describe one-to-one relationships between connected data
d. One-to-One Relationships with embedded documents presents a data model that uses embedded documents to describe one-to-one relationships between connected data

• A

• B

• C

• D

Which of the following are valid ways to represent a one-to-one relationship with the document model in MongoDB?
.
a. Embed the fields in the document.
b. Link to a single document in another collection.
c. Embed the fields as a sub-document in the document.

• A

• B

• C

A ___ data model with embedded data combines all related data for a represented entity in a single document.
.

a. denormalized
b. non relational
c. relational
d. normalized

• A

• B

• C

• D

Which of the following is used to avoid the repetition of data in MongoDB schema?
.
a. References
b. Cursor
c. Collectors
d. DeReferences

• A

• B

• C

• D

MongoDB supports searching by _____.
.
a. Range queries
b. Regular expression searches
c. Field
d. All of the mentioned above

• A

• B

• C

• D

The most frequent operations in a given application are
.
a. The read operations
b. The write operations
c. The read and write operations

• A

• B

• C

_______documents capture relationships between data by storing related data in a single document structure.
.
a. External
b. Internal
c. Embedded
d. Capped

• A

• B

• C

• D

Consider a one-to-many relationship observed between a county and the cities in that county. Which of the following are valid ways torepresent this one-to-many relationship with the document model in MongoDB?
.
a. Embed all the fields for a city as a subdocument in the corresponding county document.
b. Have a collection for the counties and a collection for the cities with each city document having a field to reference the document of
its county.
c. Embed the entities for the cities as an array of sub-documents in the corresponding county document.

• A

• B

• C

Which of the following statements are true about data modeling using MongoDB?
.
a. MongoDB should only be used for unstructured datasets.
b. MongoDB will help you iterate on the schema designs of your models throughout your application's lifecycle.
c. MongoDB is schema-less so you should not worry about designing a schema for your models.

• A

• B

• C