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Alibaba Cloud ACA-Developer Exam With Confidence Using Practice Dumps

Exam Code:
ACA-Developer
Exam Name:
ACA Developer Certification
Certification:
Vendor:
Questions:
95
Last Updated:
Feb 19, 2025
Exam Status:
Stable
Alibaba Cloud ACA-Developer

ACA-Developer: Alibaba Developer Exam 2025 Study Guide Pdf and Test Engine

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ACA Developer Certification Questions and Answers

Question 1

Which of the following options is correct, regarding Object ACL in Alibaba Cloud's Object Storage Service (OSS)?

Options:

A.

Object ACL is an object-level (not bucket level) permission control mechanism. There are currently three levels of access rights: private, public-read, and public-read-write.

B.

"Private" indicates that an object is a private resource, that is, only the owner of the object has read and write permissions on the object, and other users can read but have no permission to modify or delete the object.

C.

If the permissions of an object are not set, the permissions of the object are inherited from the bucket.

D.

You can set the ACL associated with an object by examining the X-OSS-Object-ACL header in the HEAD request, when making the PutObjectACL API call.

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Question 2

CloudMonitor's "Event Monitoring" feature provides you with event reporting, query, and alarm functions, Score 2 so that you can collect metrics on your running Alibaba Cloud systems, and receive alerts when something goes wrong. Which of these is NOT a correct description of the monitoring event types supported by CloudMonitor?

Options:

A.

For ECS, CloudMonitor supports the collection and reporting of important ECS operating system level events, such as application crashes.

B.

For Object Storage Service (OSS), CloudMonitor supports the collection and reporting of bucket upstream and downstream bandwidth which exceeds the flow control threshold or the user-selected reporting threshold.

C.

For Server Load Balancer (SLB), CloudMonitor supports the collection and reporting of HTTPS certificate expiration events, for certificates installed on SLB.

D.

For E-MapReduce, CloudMonitor supports the collection and reporting of service component status, cluster creation failure, and timeout events.

Question 3

When you use SQL statements to access tables in a database without an index configured, a full table scan will be performed. If a table contains a large amount of data, this kind of scan will access a large amount of data and consume a lot of the database's resources. Which of the following options are best practices when creating database indexes? (Number of correct answers: 3)

Options:

A.

Add an index to a field that is frequently queried but does not frequently perform add, delete, or modify operations.

B.

Applies indices to fields that contain many records.

C.

table should not contain more than 6 indexed fields.

D.

Apply indexing to fields of fixed length (preferably not long fields).

E.

Adhere to the rightmost prefix principle when using composite indexes.