Online Access Free ACA-Developer Exam Questions

A developer was sending a request to Key Management Service (KMS) through the KMSAPI interface, and found that the key management service cannot be accessed. What is a possible reason?

• A.The user key master key is in PendingDeletion state
• B.User key master key is in Disabled state
• C.The user key master key is in Pendinglmport state
• D.The HTTPS protocol is not enabled

If a user finds that the Content Delivery Network (CDN) cache hit rate is low, what could be the reason?
(Number of correct answers: 3)

• A.Cache configuration is inappropriate (ex. overly short Cache Expiry Time for popular files).
• B.HTTP Header settings may cause cache misses.
• C.Insufficient bandwidth was selected when enabling the CDN service, causing the service capacity reach its limit too early.
• D.When the website has low traffic, the CDN will receive fewer requests and this will result in a lower cache hit rate.
• E.The origin site has a large number of dynamic resources.

Which of the following is NOT a feature of Alibaba Cloud's Cassandra database service?

• A.Supports both narrow and wide tables, providing flexible schema functions
• B.Cluster storage, strong expansion of read and write capabilities
• C.Centerless distributed architecture
• D.Enterprise-level capabilities such as disaster tolerance, backup and recovery, security, and monitoring across data centers

Which of the following descriptions of the principles of Alibaba Cloud SSL certificate private key protection is correct?

• A.Alibaba Cloud Certificate Service keys are loaded Into memory in plaintext format ONLY when needed
• B.The plaintext of Alibaba Cloud's private key is usually stored on disk and backed up regularly
• C.Alibaba Cloud uses the built-in functionality of the SSL certificate service to encrypt and store the private key to certificates private key
• D.Alibaba Cloud Certificate Service uses symmetric encryption to save the certificate private key

Which of the following permission control policies does Object Storage Service (OSS) provide for access to objects stored in a bucket? (Number of correct answers: 4)

• A.Object Policy
• B.Dynamic blacklist
• C.STS authorization
• D.ACL
• E.IntranetAccess
• F.Bucket Policy
• G.RAM Policy