ACA-Developer Practice Exam Questions with Answers ACA Developer Certification

Event Notifications can cross regions.

Message Service provides synchronous notifications to ensure the consistency between the message acknowledgment and event processing.

The event notification message is retained within the valid time. When you fail to receive an event message, the event notification message is retried based on the specified retry policy.

The consumer type of the event notification message can be HTTP Server, Queue, or Topic.

Topic

Time

Content

Source

Tags

EmptyDir

NFS

ConfigFile

FixedVolume

Avoid using version management.

Use the Function Compute Service to regularly check for and delete old versions of objects.

C Use OSS s built in lifecycle management capabilities to automatically delete old versions of objects after a set time.

Use OSS's built in lifecycle management capabilities to move old versions of objects to Archival Storage.

Rejected

Executing

Failed

Timeout

Jaeger

Zipkln

Skywalklng

Pinpoint

Simple Upload

Form Upload

Multipart Upload

Append Upload

Container Registry can automatically build new Docker images when source code changes.

For source code hosted on websites outside China, Container Registry can use servers outside China to build Docker images, even when you are using a Container Registry instance in Mainland China.

You can create and delete image repositories in different regions based on your needs.

You can set your image repository access to public or private.

OSS event trigger(s)

CloudMonitor trigger(s)

MNS topic trigger(s)

SLS trigger(s)

You can migrate data between OSS buckets in any of the following conditions: Buckets are located within the same region, buckets are located across regions and buckets belong to different Alibaba Cloud accounts.

A migration job occupies the network resources of the source and the destination. To ensure business continuity, we recommend that you specify a rate limit for a migration Job or run the migration job during an off-peak period.

You cannot migrate data between OSS buckets if the data at the source is stored in a bucket of the Archive type.

Online migration supports both migrating buckets at a time, and migrating all the data under an Alibaba Cloud account at a single time.

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.

"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.

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

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.

Import the migration source information to the SMC console.

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

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

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

Request response mode

Synchronization mode

Asynchronous mode

Waiting for callback mode

The HTTPS protocol is not enabled

User key master key is in Disabled state

The user key master key is in PendingDeletion state

The user key master key is in Pendinglmport state

Region name

Zone name

Bucket name

Filename

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

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

HTTP Header settings may cause cache misses.

The origin site has a large number of dynamic resources.

Cache configuration is inappropriate (ex. overly short Cache Expiry Time for popular files).

Read and write traffic

Storage capacity

Index traffic after index configuration

Query analysis

Windows

Linux

macOS

Android

Through the STS service, RAM users or RAM roles can obtain a temporary token that allows them to call the Alibaba Cloud API or use the web console

A STS request consists of an access address, communication protocol, request method, request parameters and character encoding

When calling the STS API, in order to ensure the safe calling of the API, Alibaba Cloud will authenticate each API request through a signature when each API call is made

The STS service supports the use of both HTTP and HTTPS protocols

NoSuchStyle

NoSuchKey

NoSuchFile

NoSuchObject

NoSuchBucket

Use Multipart Upload to upload parts of a file in parallel to speed up the upload process

Multipart Upload is usually used when the size of the file to be uploaded is large

If the upload fails due to an accident during the uploading of fragments, you need to upload all the fragments again

After an upload is interrupted, the portions of the file which have successfully uploaded prior to the interruption will be saved in the OSS bucket

2

3

4

5

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.

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 .

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.

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