AWS - DynamoDB - multichoice questions

Question 1

You are designing a highly scalable application that utilizes DynamoDB for its database needs. The application is expected to handle a maximum of 1000 reads/second and 500 writes/second. Items average size is 4 KB.

How many RCU and WCU are required?

• 500 RCU and 2000 WCU
• 2000 RCU and 500 WCU
• 1000 RCU and 500 WCU
• 500 RCU and 1000 WCU

Question 2

You're team is developing a news website that receives an average of 500 read requests per second during peak hours. Each news article is approximately 10 KB in size.

How would you design the DB?

• Autoscale read capacity from min of 1 to max of 250.
• Autoscale read capacity from min of 1 to max of 750.
• Autoscale read capacity from min of 1 to max of 1000.
• Autoscale read capacity from min of 1 to max of 500.

Question 3

Consider the following JSON sample of an item in an DynamoDB table:

{
    "item_id": "123456789",
    "timestamp": "2022-05-10T10:30:00Z",
    "name": "Product A",
    "category": "Electronics",
    "price": 99.99,
    "quantity": 10
}

Which key from the item JSON sample would be most suitable as the partition key for the DynamoDB table?

• item_id
• name
• category
• price