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Alibaba Cloud ACA-Developer ACA Developer Certification Exam Practice Test

Demo: 14 questions
Total 95 questions

ACA Developer Certification Questions and Answers

Question 1

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)

Options:

A.

ACL

B.

RAM Policy

C.

Bucket Policy

D.

STS authorization

E.

Dynamic blacklist

F.

Object Policy

G.

IntranetAccess

Question 2

Which of the following statements about migrating data into and out of Object Storage Service (OSS) are correct? (Number of correct answers: 3)

Options:

A.

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.

B.

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.

C.

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

D.

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

Question 3

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?

Options:

A.

Request response mode

B.

Synchronization mode

C.

Asynchronous mode

D.

Waiting for callback mode

Question 4

When connecting to the Alibaba Cloud RDS database, in order to improve the completeness and integrity of the connection, you can enable SSL encryption and install an SSL CA certificate for the required application service. Which of the following statements are correct? (Number of correct answers: 3)

Options:

A.

Due to the way in which SSL encryption is implemented, enabling SSL encryption will significantly increase the CPU usage rate. Enable SSL encryption when there is an encryption requirement for the external network link. The intranet link is relatively safe, and generally no link encryption is required.

B.

If the RDS instance is a multi-node instance, the system will trigger the active/standby switch after the SSL service is disabled.

C.

When using read/write splitting, you can also enable SSL encryption to improve the security of the connection.

D.

It is discovered that an Alibaba Cloud RDS SSL certificate is about to expire, and the validity period needs to be updated, requiring that the certificate be updated, then reinstalled. This will restart the RDS instance.

Question 5

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?

Options:

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.

Question 6

Which of the following cloud services can be integrated with Alibaba Cloud KMS (Key Managed Service)? (Number of correct answers: 3)

Options:

A.

Elastic Compute Service (ECS)

B.

Object Storage Service (OSS)

C.

Relational Database Service (RDS)

D.

Server Load Balancer (SLB)

Question 7

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)

Options:

A.

Report event monitoring through the Python SDK

B.

Report event monitoring through the Java SDK

C.

Report event monitoring data via HTTP

D.

Report event monitoring data through the command line (CU)

Question 8

Which of the following options are correct for Multipart Upload and Resumable Upload in Object Storage Service (OSS)? (Number of correct answers: 3)

Options:

A.

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

B.

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

C.

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

D.

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

Question 9

Alibaba Cloud RabbitMQ is typically used in scenarios where message publishing and consumption performance requirements are high. Which of the following are supported message types in Alibaba Cloud Rabbit MQ? (Number of correct answers: 3)

Options:

A.

Scheduled message

B.

Ordered message

C.

Batched message

D.

Transactional message

E.

Retried message

Question 10

Which of the following programming languages are supported by the Alibaba Cloud SDK? (Number of correct answers: 3)

Options:

A.

Java

B.

Swift

C.

PHP

D.

Python

E.

Bash shell

Question 11

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

Options:

A.

Centerless distributed architecture

B.

Supports both narrow and wide tables, providing flexible schema functions

C.

Cluster storage, strong expansion of read and write capabilities

D.

Enterprise-level capabilities such as disaster tolerance, backup and recovery, security, and monitoring across data centers

Question 12

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?

Options:

A.

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

D.

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

Question 13

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?

Options:

A.

The HTTPS protocol is not enabled

B.

User key master key is in Disabled state

C.

The user key master key is in PendingDeletion state

D.

The user key master key is in Pendinglmport state

Question 14

Which of the following data volume types is not supported by Elastic Container Instance (ECI)?

Options:

A.

EmptyDir

B.

NFS

C.

ConfigFile

D.

FixedVolume

Demo: 14 questions
Total 95 questions