AWS DynamoDB 面试题与答案
问题 26. Explain the concept of DynamoDB Local.
DynamoDB Local is a downloadable version of DynamoDB that enables local development and testing. It allows developers to test applications without incurring AWS costs.
问题 27. What is the purpose of the 'DeleteItem' operation in DynamoDB?
The 'DeleteItem' operation removes one or more items from a table based on their primary key. It is used to delete specific items from a table.
问题 28. Explain the concept of Conditional Writes in DynamoDB.
Conditional Writes allow you to specify conditions that must be satisfied for a write operation to succeed. It helps in avoiding conflicts and ensuring data integrity.
问题 29. How does DynamoDB handle security and access control?
DynamoDB uses AWS Identity and Access Management (IAM) to control access to tables. You can define fine-grained access policies to control who can perform specific actions.
问题 30. What is the purpose of the 'BatchWriteItem' operation in DynamoDB?
'BatchWriteItem' writes multiple items to one or more tables using a single request. It is more efficient than making individual 'PutItem' or 'DeleteItem' calls.
用户评价最有帮助的内容：
- What is DynamoDB?
- Explain the concept of the 'GetItem' operation in DynamoDB.
- How does DynamoDB handle transactions?