ACA-Developer無料問題集「Alibaba Cloud ACA Developer Certification」

質問 1

In Alibaba Cloud RocketMQ, messages are kept for up to _____ days. We recommend configuring a monitoring service to watch the consumption status, and intervene manually when ''not consumed but to be deleted'' message alarms occur.

（A）3

（B）5

（C）4

（D）2

正解：A 解答を投票する

質問 2

Which of the following OSS tools are GUI-based? (Number of correct answers:2)

（A）Web Console

（B）ossbrowser

（C）ossutil

（D）ossf s

正解：C、D 解答を投票する

質問 3

For business scenarios with strong data reliability requirements or financial business scenarios with regulatory requirements related to data durability and availability, RDS MySQL provides a remote backup mechanism to improve reliability. Which of the following is correct, regarding RDS's remote disaster recovery capabilities?
(Number of correct answers: 3)

（A）When the database deletion operation is performed on the master instance, the operation will also be synchronized to the disaster recovery instance

（B）RDS realizes real-time synchronization between the master instance and the remote disaster recovery instance through Data Transmission Service (DTS)

（C）The primary database (the one to be backed up) must have an Alibaba Cloud Intranet address

（D）When an outage occurs in the area where the primary instance is located, and neither the primary instance (Master) nor the standby instance (Slave) can be connected to, the remote disaster recovery instance can be switched to the primary instance

正解：A 解答を投票する

質問 4

Which
of the following parameter locations should be specified for the parameter of key1 where the request URL is in the form: http://somesite.com/test?key1 =[value1] ?

（A）HTTP Body

（B）HTTP Header

（C）Query

（D）Parameter Path

正解：D 解答を投票する

質問 5

What are the advantages of using Elastic Container Instance (ECI) to deploy applications compared with using ECS? (Number of correct answers; 2)

（A）Startup in seconds without the need to reserve resources

（B）Less significant visualization layer performance losses

（C）Stronger isolation between instances

（D）Low maintenance, low costs

正解：A、D 解答を投票する

質問 6

A developer is writing logs through the Log Service API, and can see via the Logstore monitorin metrics that write traffic is about 10 MB/s, but a 403 error is reported during the writing process. Which of these is a possible cause?

（A）The target partition in the Logstore is not specified

（B）There is not enough space in the Logstore partition

（C）There is significant network delay

（D）The write throughput of a single partition is limited, and the 10 MB/s write traffic exceeds

正解：A 解答を投票する

質問 7

What are the benefits of creating indexes on PolarDB? (Number of correct answers: 2)

（A）Improve the efficiency of DDL operations.

（B）Reduce invalid data scanning.

（C）Improve the efficiency of DML operations such as UPDATE.

（D）Improve the query efficiency SELECT statements.

正解：B、D 解答を投票する

質問 8

Serverless Workflow allows you to orchestrate distributed tasks in sequence, branch, and parallel modes, and ensure that tasks are reliably coordinated according to your workflow logic. Which of the following service integration modes is not supported by Serverless Workflow?

（A）Waiting for callback mode

（B）Request response mode

（C）Asynchronous mode

（D）Synchronization mode

正解：D 解答を投票する

質問 9

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）When the website has low traffic, the CDN will receive fewer requests and this will result in a lower cache hit rate.

（D）The origin site has a large number of dynamic resources.

（E）Insufficient bandwidth was selected when enabling the CDN service, causing the service capacity reach its limit too early.

正解：A、C、E 解答を投票する

質問 10

Which of the following is NOT required for SMC (Server Migration Center) to migrate a server to Alibaba Cloud?

（A）The SMC client transfers the source data to an intermediate ECS instance.

（B）From the SMC console, configure the type of disk image to be generated during the migration.

（C）The SMC backend service generates a target Alibaba Cloud image based on the migration source.

（D）Import the migration source information to the SMC console.

正解：D 解答を投票する

ACA-Developer 無料問題集「Alibaba Cloud ACA Developer Certification」

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