QuickDialog is a multimedia company running a messaging app.
One of the principal features of QuickDialog is that pictures and messages are usually only available for a short time before they become inaccessible to users.
The app has evolved from originally centering on person-to-person photo sharing to present users' "Stories" of 24 hours of sequential content, along with "Discover", allowing brands show ad-supported short-form media. They use DynamoDB to support the mobile application and S3 to host the images and other documents shared between users. There are around more than 85 core components of DynamoDB are created.
Identify the DynamoDB components.
select 4 options.
Click on the arrows to vote for the correct answer
A. B. C. D. E. F. G.Answer: A,C,E,G.
Option A is correct - DynamoDB stores data in tables.
https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/HowItWorks.CoreComponents.htmlOption B is incorrect -tables, items, and attributes are the core components that you work with.
https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/HowItWorks.CoreComponents.htmlOption C is correct - An item is a group of attributes that is uniquely identifiable among all of the other items.
https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/HowItWorks.CoreComponents.htmlOption D is incorrect - An item is a group of attributes that is uniquely identifiable among all of the other items.
https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/HowItWorks.CoreComponents.htmlOption E is correct -Indexes are made up of partition keys and sort keys.
https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/HowItWorks.CoreComponents.htmlOption F is incorrect - Indexes are made up of partition keys and sort keys.
https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/HowItWorks.CoreComponents.htmlOption G is correct - Streams captures data modification events in DynamoDB tables.
https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/HowItWorks.CoreComponents.htmlOption H is incorrect -Streams captures data modification events in DynamoDB tables.
https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/HowItWorks.CoreComponents.htmlSure, I'll provide a detailed explanation of the DynamoDB components for you.
Amazon DynamoDB is a fully-managed NoSQL database service provided by AWS that provides fast and predictable performance with seamless scalability. It is a schema-less database, which means that it doesn't have fixed tables or columns like a traditional relational database. Instead, it is organized into tables, which are a collection of items, each of which is a set of key-value pairs. The keys are used to uniquely identify each item in the table.
Here are the descriptions of the DynamoDB components:
A. Table: A table is a collection of data items that are stored in DynamoDB. Each table has a name and is similar to a collection in other databases. Tables can store any number of items, and each item can have any number of attributes. A table is created with a specific schema, which includes the primary key(s) and any additional indexes.
B. Collection: There is no such component as "Collection" in DynamoDB. It is an incorrect option.
C. Items: Items are the fundamental data units in a DynamoDB table. Each item is a set of attributes, where each attribute has a name and a value. Attributes can be of different types, such as strings, numbers, or binary data. Items are similar to rows in a relational database, and each item is uniquely identified by its primary key. Attributes are similar to columns in a relational database.
D. Rows: There is no such component as "Rows" in DynamoDB. It is an incorrect option.
E. Indexes: Indexes are data structures that allow for efficient querying of data in a DynamoDB table. Indexes are made up of partition keys and sort keys. A partition key is a primary key attribute that determines the partition in which an item is stored. A sort key is an optional primary key attribute that can be used to sort items with the same partition key. Indexes can be global or local, and they can be created on one or more attributes.
F. Indexes: There is no such component as "Indexes made up of primary keys and sort keys" in DynamoDB. It is an incorrect option.
G. Streams: Streams are used to capture data modification events in DynamoDB tables. Streams provide a time-ordered sequence of item-level modifications, including inserts, updates, and deletes. Streams can be used to build real-time data processing and analysis applications, as well as to replicate data across multiple DynamoDB tables or AWS services.
H. Uniquely Identifies: There is no such component as "Uniquely Identifies" in DynamoDB. It is an incorrect option.
H. Primary Key: The primary key is the main attribute used to uniquely identify each item in a DynamoDB table. A primary key can be either a partition key or a combination of partition key and sort key. The partition key is used to determine the partition in which an item is stored, while the sort key is used to sort items with the same partition key.
I hope this explanation helps you understand the DynamoDB components better.