Top 50 DynamoDB Multiple Choice Questions (MCQs) with Answers

1 .

How many attributes does DynamoDB allows?

A)

5

B)

10

C)

15

D)

20

Correct Answer : 20

Explanation : DynamoDB Allows 20 Attributes.

2 .

Amazon DynamoDB is a ____ Database?

A)

SQL

B)

NoSQL

C)

MySQL

D)

All of the above

Correct Answer : NoSQL

Explanation : Amazon DynamoDB is a fully managed proprietary NoSQL database service that supports key-value and document data structures and is offered by Amazon.com as part of the Amazon Web Services portfolio.

3 .

How many types of primary keys does DynamoDB use?

A)

2

B)

3

C)

4

D)

5

Correct Answer : 2

Explanation : DynamoDB uses Two types of Primary keys :

* Partition Key
* Partition key and Sort Key

4 .

How many types of secondary indexes does DynamoDB supports?

A)

2

B)

3

C)

4

D)

5

Correct Answer : 2

Explanation : DynamoDB supports two types of secondary indexes: Global secondary index and Local secondary index.

5 .

Partition key and Sort Key are also known as ____?

A)

Clear primary key

B)

Dependent primary key

C)

Composite primary key

D)

None of the above

Correct Answer : Composite primary key

Explanation : The partition key and Sort Key is also known as Composite primary key.

6 .

Amazon DynamoDB Initial release date?

A)

18 January 2014

B)

18 January 2012

C)

18 January 2010

D)

18 January 2007

Correct Answer : 18 January 2012

Explanation : Amazon DynamoDB Initial release date: 18 January 2012

7 .

This straightforward primary key consists of a single property known as the ____?

A)

sort key

B)

partition key

C)

Both (A) and (B)

D)

None of the above

Correct Answer : partition key

Explanation : This straightforward primary key consists of a single property known as the "partition key."

8 .

______ Indexes enable you to query table data using a different key?

A)

Primary

B)

Secondary

C)

Composite

D)

None of the above

Correct Answer : Secondary

Explanation : Secondary indexes enable you to query table data using a different key.

9 .

Partition and sort keys may differ from table keys in ____ type of secondary index.

A)

Global secondary indexes

B)

Local secondary indexes

C)

Both (A) and (B)

D)

None of the above

Correct Answer : Global secondary indexes

Explanation : Partition and sort keys may differ from table keys in the Global secondary index.

10 .

DynamoDB offers how many ways to conduct operations?

A)

6

B)

5

C)

4

D)

3

Correct Answer : 3

Explanation : DynamoDB offers three ways to conduct operations: a web-based Graphical interface, a JavaScript shell, and your preferred programming language.

11 .

____ are used by DynamoDB to store data?

A)

Units

B)

Sections

C)

Partitions

D)

Segments

Correct Answer : Partitions

Explanation : Partitions are used by DynamoDB to store data.

12 .

The usage of reserved words as names is prohibited by DynamoDB?

A)

True

B)

False

C)

Can Not Say

D)

None of the above

Correct Answer : False

Explanation : The usage of reserved words as names is not prohibited by DynamoDB.

13 .

A DynamoDB table has no default TTL value?

A)

True

B)

False

C)

Can Not Say

D)

None of the above

Correct Answer : True

Explanation : A DynamoDB table has no default TTL value.

14 .

With DynamoDB, the maximum size of an object is ____?

A)

100 MB

B)

50 MB

C)

10 MB

D)

1 MB

Correct Answer : 1 MB

Explanation : With DynamoDB, the maximum size of an object is 1 MB.

15 .

Which of the following type of secondary index has the same partition key as the table, but its sort key is different?

A)

Local secondary indexes

B)

Global secondary indexes

C)

Can Not Say

D)

None of the above

Correct Answer : Local secondary indexes

Explanation : Secondary indexes index has the same partition key as the table, but its sort key is different.

16 .

DynamoDB uses which of the following consistent reads to support dynamic application needs?

A)

Strongly consistent

B)

Eventually consistent

C)

Both (A) and (B)

D)

None of the above

Correct Answer : Both (A) and (B)

Explanation : To satisfy the demands of dynamic applications, DynamoDB employs eventually consistent and strongly consistent reads.

17 .

A read capacity unit is a single consistent read per second for items no larger than?

A)

1KB

B)

2KB

C)

4KB

D)

8KB

Correct Answer : 4KB

Explanation : A read capacity unit is a single consistent read per second for items no larger than 4KB. A write capacity unit is a single write per second for items no bigger than 1KB.

18 .

Names must conform to a minimum of 3 characters in length, and a maximum of?

A)

31

B)

63

C)

127

D)

255

Correct Answer : 255

Explanation : Names must conform to a minimum of 3 characters in length, and a maximum of 255.

19 .

Expression strings have a _____ limit.

A)

1KB

B)

2KB

C)

4KB

D)

8KB

Correct Answer : 4KB

Explanation : Expression strings have a 4KB limit. Attribute expressions have a 255-byte limit. Substitution variables of an expression have a 2MB limit.

20 .

Which types represent a single value, and include number, string, binary, Boolean, and null?

A)

Set

B)

Scalar

C)

Document

D)

None of the above

Correct Answer : Scalar

Explanation : Scalar : These types represent a single value, and include number, string, binary, Boolean, and null.

21 .

Eventually Consistent readings always return current data?

A)

True

B)

False

C)

Can Not Say

D)

None of the above

Correct Answer : True

Explanation : False, Eventually Consistent readings do not always return current data.

22 .

Do The strongly consistent reads always deliver current data?

A)

True

B)

False

C)

Can Not Say

D)

None of the above

Correct Answer : True

Explanation : The strongly consistent reads always deliver current data.

23 .

How many types of data type categories does DynamoDB support?

A)

6

B)

5

C)

4

D)

3

Correct Answer : 3

Explanation : Each data type in DynamoDB falls into one of the 3 Categories :

* Scalar
* Document
* Set

24 .

A ____ operation reads all of the elements in the table.

A)

Query

B)

PutItem

C)

Scan

D)

GetItem

Correct Answer : Scan

Explanation : A scan operation reads all of the elements in the table.

25 .

Does Null values supported by DynamoDB?

A)

Yes

B)

No

C)

Can Not Say

D)

None of the above

Correct Answer : Yes

Explanation : Yes, DynamoDB supports Null values.

26 .

Which of the following atomic operation does DynamoDB supports?

A)

Increment atomic operation

B)

Decrement atomic operation

C)

Both (A) and (B)

D)

None of the above

Correct Answer : Both (A) and (B)

Explanation : Amazon DynamoDB supports atomic increment and decrement operations.

27 .

Can I get rid of local secondary indexes?

A)

Yes

B)

No

C)

Can Not Say

D)

None of the above

Correct Answer : No

Explanation : Currently, Amazon DynamoDB is unable to remove the table's local secondary indexes once they have been established.

28 .

____ types represent a complex structure possessing nested attributes and include lists and maps.

A)

Set

B)

Scalar

C)

Document

D)

None of the above

Correct Answer : Document

Explanation : Document types represent a complex structure possessing nested attributes, and include lists and maps.

29 .

DynamoDB tables are ______?

A)

Schema less

B)

Schema Full

C)

Mix

D)

None of the above

Correct Answer : Schema less

Explanation : DynamoDB tables are Schema less.

30 .

___ must-have elements of the same type, whether they be numbers, strings, or binary.

A)

List

B)

Sets

C)

Map

D)

None of the above

Correct Answer : Sets

Explanation : Sets must-have elements of the same type, whether they be numbers, strings, or binary.

31 .

For Table Maintenance, DynamoDB provides how many low-level operations?

A)

2

B)

3

C)

4

D)

5

Correct Answer : 5

Explanation : For Table Maintenance, DynamoDB provides five low-level operations:

* CreateTable
* ListTable
* Update Table
* Describe table
* Delete Table

32 .

Which of the following operation in DynamoDB returns table metadata such as status, size, and indexes?

A)

CreateTable

B)

ListTable

C)

Describe table

D)

Update Table

Correct Answer : Describe table

Explanation : Describe table operation returns table metadata such as status, size, and indexes.

33 .

For data reading, DynamoDB provides how many low-level operations?

A)

2

B)

3

C)

4

D)

6

Correct Answer : 4

Explanation : For data reading, DynamoDB provides four low-level operations:

* GetItem
* BatchGetItem
* Scan
* Query

34 .

Which of the following data-reading action in DynamoDB receives a primary key and returns the corresponding item's attributes?

A)

GetItem

B)

Scan

C)

Query

D)

BatchGetItem

Correct Answer : GetItem

Explaination : GetItem action receives a primary key and returns the corresponding item's attributes.

35 .

You may generate an access key and a secret key by establishing a user in Amazon IAM (Identity Access Management).

A)

True

B)

False

C)

Can Not Say

D)

None of the above

Correct Answer : True

Explaination : You may generate an access key and a secret key by establishing a user in Amazon IAM (Identity Access Management).

36 .

Maximum length of String data type is?

A)

200KB

B)

400KB

C)

600KB

D)

800KB

Correct Answer : 400KB

Explanation : String : They are Unicode using UTF-8, with a minimum length of >0 and maximum of 400KB.

37 .

In Action Data Types, which represents key table and index schema?

A)

Capacity

B)

PutRequest

C)

TableDescription

D)

AttributeDefinition

Correct Answer : AttributeDefinition

Explanation : AttributeDefinition : It represents key table and index schema

38 .

In Action Data Types, which represents PutItem requests?

A)

TableDescription

B)

PutRequest

C)

LocalSecondaryIndex

D)

ProvisionedThroughput

Correct Answer : PutRequest

Explanation : PutRequest : It represents PutItem requests

39 .

Which of the following are benefits of using Amazon DynamoDB?

A)

It is scalable

B)

It is durable and highly available

C)

It provides the users high throughput at very low latency.

D)

All of the above

Correct Answer : All of the above

Explanation : All of the above are benefits of using Amazon DynamoDB

40 .

______ is a collection of properties that are transferred or anticipated from a table to an index.

A)

Projection

B)

Estimation

C)

Forecasted

D)

None of the above

Correct Answer : Projection

Explanation : A projection is a collection of properties that are transferred or anticipated from a table to an index.

41 .

Can you connect to EC2 instances without the key pair?

A)

Yes

B)

No

C)

Can Not Say

D)

None of the above

Correct Answer : No

Explanation : No, Without the key pair, you cannot connect to EC2 instances.

42 .

Binary and binary set properties supported by the DynamoDB/EMR connection?

A)

True

B)

False

C)

Can Not Say

D)

None of the above

Correct Answer : False

Explanation : Binary and binary set properties are not supported by the DynamoDB/EMR connection.

43 .

_______ service allows you to handle large amounts of data rapidly and effectively?

A)

Amazon's MapReduce

B)

Amazon's Hive MapReduce

C)

Amazon's Elastic MapReduce (EMR)

D)

None of the above

Correct Answer : Amazon's Elastic MapReduce (EMR)

Explanation : Amazon's Elastic MapReduce (EMR) service allows you to handle large amounts of data rapidly and effectively.

44 .

______ logs low-level API calls from or for DynamoDB in an account and sends them to an S3 bucket.

A)

EMR

B)

CloudWatch

C)

CloudMonitor

D)

CloudTrail

Correct Answer : CloudTrail

Explanation : CloudTrail logs low-level API calls from or for DynamoDB in an account and sends them to an S3 bucket.

45 .

Which of the following data-reading action, does many GetItem calls on various items using primary keys, with the option of using one or more tables?

A)

Scan

B)

Query

C)

GetItem

D)

BatchGetItem

Correct Answer : BatchGetItem

Explaination : BatchGetItem does many GetItem calls on various items using primary keys, with the option of using one or more tables.

46 .

DynamoDB offers ____ low-level actions for data modification.

A)

2

B)

3

C)

4

D)

5

Correct Answer : 4

Explanation : DynamoDB offers four low-level actions for data modification:

* PutItem
* BatchWriteItem
* UpdateItem
* DeleteItem

47 .

DynamoDB often ensures consistency across all copies in less than a second.

A)

True

B)

False

C)

Can Not Say

D)

None of the above

Correct Answer : True

Explanation : DynamoDB often ensures consistency across all copies in less than a second.

48 .

Do Batch writes have the ability to alter things across a single table?

A)

True

B)

False

C)

Can Not Say

D)

None of the above

Correct Answer : False

Explanation : Batch writes can alter things across several tables.

49 .

What is the limit to create a global secondary index per table?

A)

5

B)

6

C)

7

D)

No Limit

Correct Answer : 5

Explanation : A maximum of five global secondary indexes are permitted per table.

50 .

What is the limit to create a local secondary index per table?

A)

4

B)

5

C)

6

D)

No Limit

Correct Answer : 5

Explanation : A maximum of five local secondary indexes are permitted per table.

51 .

Which of the following IAM role includes all of the activities you've given the pipeline permission to do?

A)

DataPipelineDefaultRole

B)

DataPipelineDefaultResourceRole

C)

Both (A) and (B)

D)

None of the above

Correct Answer : DataPipelineDefaultRole

Explanation : DataPipelineDefaultRole includes all of the activities you've given the pipeline permission to do.

52 .

______ can export and import data to and from a table, file, or S3 bucket.

A)

Sharding

B)

Data Shifting

C)

Data Pipeline

D)

None of the above

Correct Answer : Data Pipeline

Explanation : Data Pipeline can export and import data to and from a table, file, or S3 bucket.

53 .

Tags are not supported by DynamoDB.

A)

True

B)

False

C)

Can Not Say

D)

None of the above

Correct Answer : True

Explanation : Tags are not supported by DynamoDB.

54 .

How many IAM roles are needed to use the data pipeline?

A)

1

B)

2

C)

3

D)

4

Correct Answer : 2

Explanation : To utilize Data Pipeline, you must have two IAM roles:

* DataPipelineDefaultRole
* DataPipelineDefaultResourceRole

55 .

Global Secondary Index supports which of the following API?

A)

Scan

B)

Query

C)

Both (A) and (B)

D)

None of the above

Correct Answer : Both (A) and (B)

Explanation : Global Secondary Index supports the API functions "Query" and "Scan."

56 .

Tables using a local secondary index must adhere to a size restriction of ____ per partition key value.

A)

10GB

B)

50GB

C)

100GB

D)

250GB

Correct Answer : 10GB

Explanation : Tables using a local secondary index must adhere to a size restriction of 10GB per partition key value.