Alibaba Cloud ACA-Developer Exam Info and Free Practice Test PracticeMaterial [Q35-Q54]

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Alibaba Cloud ACA-Developer Exam Info and Free Practice Test | PracticeMaterial

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NO.35 Which of the following statements describe the trace/D and spanID in a service tracking system (such as Zipkin) correctly? (Number of correct answers: 3)

When the user’s request enters the system, a globally unique traceld will be generated on the first layer of the calling network.

The tracelD will be called with each layer and passed back continuously, so through traceld, the path of a user request in the system can be connected in series.

Spanld can locate the position of a request in the system call, and who its upstream and downstream dependencies are respectively.

Traceld is used to distinguish the sequence of calls between different services of the system, spanld is used to concatenate all the paths that a certain request traverses in the system.

NO.36 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?

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

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.

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

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

NO.37 Which of the following data volume types is not supported by Elastic Container Instance (ECI)?

EmptyDir

NFS

ConfigFile

FixedVolume

NO.38 Which of the following options are correct for Multipart Upload and Resumable Upload in Object Storage Service (OSS)? (Number of correct answers: 3)

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

NO.39 You want to deploy a LAMP development environment in Alibaba Cloud’s Singapore region, and you want to simultaneously bind a domain name and configure HTTPS. Which of these services can help you accomplish this quickly and easily?

Elastic Compute Service (ECS)

Elastic Container Instance (ECI)

Simple Application Server (SAS)

Alibaba Cloud Container Service for Kubernetes (ACK)

NO.40 When versioning is enabled for an OSS Bucket, previous versions of objects will be retained, using storage space and incurring additional costs. How can you save space and reduce costs, while retaining some of the benefits of object versioning?

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.

NO.41 Which of the following statements about PolarDB’s endpoint(s) is NOT correct?

The endpoint of the PolarDB MySQL database includes the cluster endpoint and the primary endpoint.

Through a cluster endpoint, applications can connect to data nodes.

The primary endpoint supports read/write splitting.

Cluster endpoints support read/write splitting.

NO.42 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)

Scheduled message

Ordered message

Batched message

Transactional message

Retried message

NO.43 A mobile application developer intends to use Alibaba Cloud Object Storage Service (OSS) to store the end user data for their app, and to ensure data isolation between each user of the app, to prevent one user from obtaining another’s data. Which method can be done to meet these requirements?

RAM Policy

STS authorization

Bucket Policy

Object Policy

NO.44 What are the advantages of using Elastic Container Instance (ECI) to deploy applications compared with using ECS? (Number of correct answers; 2)

Low maintenance, low costs

Startup in seconds without the need to reserve resources

Less significant visualization layer performance losses

Stronger isolation between instances

NO.45 You can use Alibaba Cloud Data transmission service (DTS) or the open source tool Redis-shake to migrate and synchronize data from a local Redis instance to an Alibaba Cloud Redis instance. What is one feature which DTS has but Redis-shake does not?

Full data migration

Incremental data migration

One-way data synchronization

Two-way data synchronization

NO.46 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 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.

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

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

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

NO.47 Which of the following is NOT a feature of Alibaba Cloud’s Cassandra database service?

Centerless distributed architecture

Supports both narrow and wide tables, providing flexible schema functions

Cluster storage, strong expansion of read and write capabilities

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

NO.48 Which of the following statements describes AKs (Access Keys) incorrectly?

AK can refer to both the AccessKey ID and the AccessKey secret

You can use AK to construct an API request and the corresponding resources can be manipulated if your request successfully..

An AccessKey ID and AccessKey Secret cannot be used separately

AccessKey Secrets for RAM sub-accounts can be queried at any time on the Console Interface after creation

NO.49 Which of these are suitable use cases for Alibaba Cloud’s ApsaraDB for Redis service? (Number of correct answers: 3)

Online gaming user rankings (scoreboard)

E-Commerce sales & promotions

Live video chat system

Enterprise OA system

NO.50 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?

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

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

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

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

NO.51 Alibaba Cloud Log Service is a Pay-As-You-Go service. The billing unit is 7 day, and the configuration can be adjusted at any time: fees are charged according to actual usage. Which of the following are the main charges for Log Service? (Number of correct answers: 3)

Read and write traffic

Storage capacity

Index traffic after index configuration

Query analysis

NO.52 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] ?

Parameter Path

HTTP Header

Query

HTTP Body

NO.53 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?

There is significant network delay

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

There is not enough space in the Logstore partition

The target partition in the Logstore is not specified

NO.54 Log Service uses a semi-structured data model to define a log. This mode contains five data fields:
Topic, Time, Content, Source, and Tags. Log Service has different requirements for the format of each field in the log. Which of the following fields cannot be empty characters? (Number of correct answers: 4)

Topic

Time

Content

Source

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