You have created anew provisioned table in DynamoDB. You want to read 60 items per second from this table, with each item having 6 KB size. Also, you want to write 80 items per second, with each item 1.5 KB in size. Which of the following will provisioned read capacity units for strongly consistent read per second & write capacity units will be set to avoid request throttling? (Select Two)

Answer options:

A.240 WCU
B.120 RCU
C.80 WCU
D.60 RCU
E.160 WCU
F.240 RCU

Correct Answer – B, E
 To determine provisioned Read Capacity Units, the following calculation steps are performed,
1)Item Size / 4KB, rounding to nearest whole number.
a. So, in the above case, 6KB / 4 KB = 1.5 or 2 read capacity units.
2)1 read capacity unit per item (since strongly consistent read)× No of reads per second
a. So, in the above case, 2 x 60 = 120 read capacity units.
To determine provisioned Write Capacity Units, the following calculation steps are performed,
1)Item Size / 1KB, rounding to nearest whole number.
a. So, in the above case, 1.5KB / 1 KB = 1.5 or 2 write capacity units.
2)1 write capacity unit per item × No of write per second
a. So, in the above case, 2 x 80 = 160 write capacity units.
Options A, C, D,& F are incorrect as these values are not as per the above calculations.
For more information on calculations for Read Capacity & Write Capacity Units, refer to the following URL-
https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/ProvisionedThroughput.html