AliCloud ACA-Developer Exam Questions have been Updated

dumps2022-03-26T01:58:44+08:00

Are you planning to take Alibaba Cloud ACA-Developer exam? Want to pass ACA-Developer exam easily? Do not have enough time to prepare for ACA-Developer exam? The online updated Alicloud ACA-Developer exam questions are your best choice to study. Free updated Alibaba Cloud ACA-Developer exam questions are below.

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1. In order to have your applications interact with Alibaba Cloud RabbitMQ, you need to create related MQ resources first.

Which of the following resources must be created? (Number of correct answers: 3)

Vhost

Exchange

Queue

Broker

Topic

2. During the process of backing up an RDS database, a developer found that the backup failed.

What might cause this to happen?

The database instance is not stopped

DDL operations were performed during the backup

DML operations were performed during the backup

DCL operations were performed during the backup

3. Which of the following descriptions describes the (Security Token Service) STS service correctly? (Number of correct answers: 3)

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

4. When a developer calls the Alibaba Cloud SDK to access Elastic Compute Service (ECS), the following error is returned; RealNameAuthenticationError

What is the possible cause?

The ECS instance name violates the ECS service's naming conventions.

The ECS instance name conflicts with other instance names.

The user's Alibaba Cloud account has not passed real name authentication

The API callers account and password are not authorized for ECS access.

5. 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?

Request response mode

Synchronization mode

Asynchronous mode

Waiting for callback mode

6. 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)

Serverless Workflow

Function Compute

Log Service

Elastic Compute Service (ECS)

Server Load Balancer (SLB)

7. A Developer is asked to implement a caching layer in front of RDS. Cached content is expensive to regenerate in case of service failure.

Which implementation below would work while maintaining maximum uptime?

Implement ApsaraDB for Redis in Cluster Mode

Install Redis on an ECS instance

Implement ApsaraDB for Redis in Standard Mode

Migrate the ROS database to HBase to save the cache layer

8. 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

9. Which of the following options is not included in Object Storage Service (OSS) object URLs?

Region name

Zone name

Bucket name

Filename

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

Improve the query efficiency SELECT statements.

Improve the efficiency of DML operations such as UPDAT

Improve the efficiency of DDL operations.

Reduce invalid data scanning.

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11. Which of these are suitable use cases for Alibaba Cloud's MongoDB service? (Number of correct answers: 3)

Applications requiring high OPS, such as logging apps

Scenarios where complex transaction support is required

Applications where JSON is a good choice of storage format

Applications requiring geo-location queries, such as logistics or order status apps

12. A developer accesses logs in a Log Service Logstore via the API. The error code returned by the server is 404.

Which of these could be the cause?

The log project (Project) does not exist

The requested digital signature does not match

Server internal error

Server is busy: please try later

13. 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 SL

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

14. 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

15. Which of the following are correct, regarding RAM users? (Number of correct answers: 3)

RAM users can be created under a single Alibaba Cloud account, corresponding to employees, systems, or applications.

RAM users do not "own" the resources that they create (those belong to the Alibaba Cloud account itself), and RAM users cannot generate and pay their own individual bills (costs accrue to and are billed to the master Alibaba Cloud account).

RAM users belong to an Alibaba Cloud account, but they can also operate as independent accounts with their own private resources, not visible to the primary Alibaba Cloud account.

RAM users must be authorized by the Alibaba Cloud account to log in to the console or use the API to manage the resources owned by the Alibaba Cloud account.

16. Which of the following statements are correct, with regard to Alibaba Cloud Log Service? (Number of correct answers: 3)

As an agent for collecting logs, Logtail can collect logs from existing system log files in a non-intrusive manner

The Log Service frontend service adopts an LVS + NGINX architecture

The Logstore backend service is deployed on a single machine to complete the real-time persistence, indexing, query and delivery of Logstore data to MaxCompute

Each log written to the Log Service backend will be saved in triplicate (across three separate physical servers)

17. 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

18. 1 he server uploads the resume to OSS

Which of the following methods can be used to upload objects to OSS without requiring Step 3?

Simple Upload

Form Upload

Multipart Upload

Append Upload

19. Which of the following database connection methods does ApsaraDB for Redis support? (Number of correct answers: 2)

DMS (Data Management Service)

aliyun-cll

Redis-cIl

Sentinel

20. 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)

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).

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21. Assume that a company uses ApsaraDB for PolarDB. The company commonly queries users based on their basic information, including: addresses, company names, and ID numbers.

In this scenario, what is the best practice for creating a database index (or indexes)?

Create a b-tree index on each column to be searched.

Create a hash index on each column to be searched.

Create a gin index for multiple fields.

Create a gist index for multiple fields.

22. On which operating systems can you install Alibaba Cloud command line tools? (Number of correct answers: 3)

Windows

Linux

macOS

Android

23. A development team currently supports an application that is designed to be deployed on a single server's local memory As part of migrating to Alibaba Cloud, the team needs to use Auto Scaling, and must therefore move their game state data off of their servers, so that they can automatically scale up and down without losing game data.

Where should the team store these game results to best allow for consistent results without impacting performance?

OSS

RDS

Redis

Log Service

24. To meet data analytics requirements on large datasets, which of these databases can meet the demand for structured and semi-structured storage for almost all types of data, albeit with limited support for strong transactions?

HBase

OceanBase

RDSMariaDB

TSDB

AliCloud ACA-Developer Exam Questions have been Updated

AliCloud ACA-Developer Exam Questions have been Updated

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