Exam AWS Certified Developer Associate topic 1 question 1 discussion

I think is C https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/transaction-apis.html

Answer seems to be D. Earlier I too thought of C as dynamoDB has transactions api but they take more WCU and RCU. I searched and found a article which suggests that for gamers Aurora MySQL is the preference. Please refer below link: https://aws.amazon.com/blogs/database/level-up-your-games-with-amazon-aurora/

Only possible answers are C or D. But looking at answers and latest updates, answer "C" seems most suitable bacause dynamodb support single all-or-nothing TransactWriteItems or TransactGetItems operations and its key valaue nature support high performance.

A) DynamoDB Consistent Read: ensures strong consistent reads. But question is asking for Updates (i.e. Writes Operation) - Eliminated B) ElastiCache for Memcached: Is in memory key-value store, So not suitable for storing or transactions operations. - Eliminated E) Amazon Athena: is query service for analyzing data in S3 using SQL.- Eliminated

DynamoDB has the capability to perform Transactional queries ( all succeed or rollback everything )

I think so C DynamoDB provide to perform multiple write operations (e.g., updates, inserts, deletes) and read operations within a single transaction.

Which answer should we consider as correct? Option with most voted or one mentioned in revel answer? Please help me as I am preparing for exam

both C and D are valid

Please tell me are the answers suggested here correct answer otherwise why do we have all this variations with an answer and what is voted as the anser

What is the difference between current dump and this one? https://www.examtopics.com/exams/amazon/aws-certified-developer-associate-dva-c02/

Amazon DynamoDB provides support for ACID (Atomicity, Consistency, Isolation, Durability) transactions through its TransactWriteItems and TransactGetItems operations. With these operations, you can group multiple write operations and/or read operations into a single transaction. If any part of the transaction fails, all changes are rolled back, ensuring data consistency.

I think the answer is D. Because the question is to build a trade system for gaming, not build a game system.

Amazon DynamoDB supports transactional operations using the TransactWriteItems and TransactGetItems operations. These operations allow you to group multiple write and read operations into a single, all-or-nothing transaction. If any of the operations in the transaction fail, the entire transaction will be rolled back, ensuring data consistency. Option D is wrong(Amazon Aurora MySQL with operations made within a transaction block) is a relational database and does support transactions, but it might be overkill for a gaming website's item trading feature, and the cost and complexity might be higher compared to DynamoDB.

Dynamo db is more flexible in this

I vote for C, DynamoDB is more flexible and it supports transactions by using Transact*

My first choice would have been DynamoDB, however, the question is asking about gamers that require rollback. Aurora can commit or "roll back the current transaction"; https://docs.aws.amazon.com/whitepapers/latest/amazon-aurora-mysql-db-admin-handbook/transaction-management-and-autocommit.html

Definitely C: https://aws.amazon.com/blogs/aws/new-amazon-dynamodb-transactions/