ACA Developer Certification (ACA-Developer) Free Practice Test

Question 1

Alibaba Cloud's ECS disk snapshotting tool can create crash-consistent snapshots for all types of Cloud Disks.
It is a convenient and efficient disaster recovery method. It is often used for data backup, custom mirroring, application disaster recovery, etc. Which of the following is NOT a correct description of disk snapshots?

A. A snapshot is a backup file of the cloud disk data state at a certain point in time. The first snapshot of the cloud disk is a full snapshot of the ac usage. Empty data blocks are not backed up. All subsequent snapshots are incremental snapshots, and only changed data blocks are stored.

B. Snapshots can be created manually through the web console or command line tools, or automatically according to a schedule.

C. In the event of a system failure, you can use a snapshot to roll back the Cloud Disk to an earlier point in time.

D. Snapshot rollbacks can be performed while the ECS instance is running.

Correct Answer: A

Question 2

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

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

C. When the database deletion operation is performed on the master instance, the operation will also be synchronized to the disaster recovery instance

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

Correct Answer: C

Question 3

The event monitoring feature in CIoudMonitor provides custom event monitoring functions. Which of the following data reporting methods are included? (Number of correct answers: 3)

A. Report event monitoring data through the command line (CU)

B. Report event monitoring through the Java SDK

C. Report event monitoring through the Python SDK

D. Report event monitoring data via HTTP

Correct Answer: B,C,D

Question 4

A Developer is creating a Function Compute function. This function requires around 1 GB of temporary storage for files while executing. These files will not be needed after the function is completed for a fixed period. How can this developer MOST efficiently handle the temporary files?

A. Store the files in the /tmp directory on a temporary ECS instance, and delete the files at when the Function Compute function call completes.

B. Copy the files to NFS and delete the files when the Function Compute function call completes.

C. Store the files in Cloud Disk and delete the files when Function Compute function call completes.

D. Copy the files to an OSS bucket with a lifecycle policy configured to delete the files automatically.

Correct Answer: A

Question 5

A company has some new content that needs to be promoted (such as new features, new activities, new games, or new articles). In order to achieve the overall promotion goal, the operating staff will select various channels for promotion (including standard HTML/HTML5 (desktop), iOS, and Android). You are using Alibaba Cloud's Log Service: in order to ascertain the effectiveness of content promotion accurately and in real time, which log collection method should you use, as a developer?

A. Kafka

B. Web Tracking

C. Logslash

D. Syslog

Correct Answer: D

Question 6

Which of the following are types of backend services that API Gateway supports? (Number of correct answers: 3)

A. Resources In a VPC

B. CloudMonitor Service

C. HTTP(s) service

D. Function Compute

E. Log service

Correct Answer: A,B,C

Question 7

Company A has a large number of files store in Alibaba Cloud OSS that need to be deleted (numbering in the tens of thousands). What is the fastest, easiest way to delete these files?

A. Manually delete them one by one

B. Directly delete the bucket

C. Configure a life cycle rule that matches the entire bucket, and delete all files after one day

D. Call the API from a script, deleting files in batches

Correct Answer: A

Question 8

Elastic Container instance (ECI) is an agile, secure, serverless service for running containers. If you need to configure public network access for ECI, which of these are reasonable solutions? (Number of correct answers: 3)

A. Configure ECI as a backend for a Server Load Balancer (SLB) that has a public IP address.

B. Bind a NAT gateway and an EIP to the VPC to which the ECI belongs.

C. Bind an Elastic IP (EIP) to the ECI instance.

D. Specify a public IP address when creating the ECI.

Correct Answer: A,B,D

Question 9

You have an application with the following requirements:
7. There will be a lot of video content that need to be uploaded.
2. Each uploaded video needs to be preprocessed to provide different video resolutions and quality levels to accommodate different devices and network conditions.
3. It should be possible to process video in parallel at scale, to ensure that videos are preprocessed in a reasonable amount of time.
Which of the following Alibaba Cloud applications can be combined to provide a low operation and maintenance burden and relatively low operating costs? (Number of correct answers: 3)

A. Elastic Compute Service (ECS)

B. Server Load Balancer (SLB)

C. Function Compute

D. Serverless Workflow

E. Log Service

Correct Answer: A,D,E

Question 10

You have a Java application with source code stored on GitHub. Now you want to build a container image using this code, and store it on a Container Registry instance located in Mainland China. Which of the following is the simplest, lowest maintenance option?

A. Upload the Dockerfile to GitHub for version control, then download it together with the Java code to your local device, compile and pack container image, and upload the image to Alibaba Cloud Container Registry via docker push .

B. Associate your Alibaba Cloud Container Registry instance with your GitHub repository, and upload the Java code and Dockerfile to GitHub Th Container Registry's built-in build service, configuring a rule that will rebuild your container image whenever your GitHub code is updated

C. Download the Java code from GitHub to your laptop, build the Docker image using a local Dockerfile, and use docker push to upload It to Container Registry.

D. Associate your Alibaba Cloud Container Registry instance with your GitHub repository, and upload the Java code and Dockerfile to GitHub Set u Jenkins environment to automate the process of building the container image and pushing it to your Container Registry instance.

Correct Answer: B

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Alibaba Cloud ACA Developer Certification (ACA-Developer) Free Practice Test