Alibaba Developer ACA-Developer Exam Free Dumps

dumps2021-10-15T03:20:13+08:00

To pass Alibaba Developer ACA-Developer exam easily, the online ACA-Developer dumps questions are the best study guides. There are 50 questions in real Alibaba Cloud ACA-Developer exam, and you have 90 minutes to complete all the questions. Alibaba Developer ACA-Developer exam dumps are the best material to ensure you pass. Free Alibaba Cloud ACA-Developer exam dumps are vailable below.

Page 1 of 2

1. By default Function Compute cannot access resources within a VPC network group.

To enable Function Compute to access resources located in a VPC, which of the following parameters needs to be configured? (Number of correct answers: 3)

vpcld

vSwitchlds

securityGroupId

ENIID

2. Which of the following descriptions of Alibaba Cloud's SSL certificate service are correct? (Number of correct answers: 2)

Alibaba Cloud SSL Certificate Service supports the purchase of three types of certificates: DV certificates, OV certificates, and EV certificates.

EV certificates are suitable for large enterprises, financial institutions, etc.

OV certificates are suitable for personal websites.

DV level certificates are suitable for government organizations, enterprises, educational institutions, etc.

3. Which of the following errors may occur when you access an image stored in Object Storage Service, and attach an image processing URL parameter to the URL? (Number of correct answers: 3)

NoSuchStyle

NoSuchKey

NoSuchFile

NoSuchObject

NoSuchBucket

4. Which of the following web applications are suitable for deployment on Simple Application Server (SAS), as compared with LCS? (Number of correct answers: 3)

Quickly build a personal blog website

Quickly build a small e-commerce website

Quickly build serverless site using Function Compute

Set up a NoSQL database service

Quickly build a personal, learning, or test environment

5. Which of the following descriptions of the principles of Alibaba Cloud SSL certificate private key protection is correct?

Alibaba Cloud uses the built-in functionality of the SSL certificate service to encrypt and store the private key to certificates private key

The plaintext of Alibaba Cloud's private key is usually stored on disk and backed up regularly

Alibaba Cloud Certificate Service uses symmetric encryption to save the certificate private key

Alibaba Cloud Certificate Service keys are loaded Into memory in plaintext format ONLY when needed

6. A developer recently discovered that their company's application is beginning to suffer performance degradation as a result of increased user demand for the application. After some analysis, the major bottleneck is discovered to be the RDS database instance which hosts the company's databases, "A" and "B". The developer plans to use the DTS data migration solution to move one of the databases to a new RDS instance.

Which of the following statements is correct? (Number of correct answers: 3)

The code for the application will have to be rewritten once this migration is complete.

The database account used for data migration must have read and write permissions. To ensure database security, please delete the database account used for data migration or reclaim related write permissions after data migration is completed.

After disconnecting the connection between the source instance database B and the application, you need to log in to the source database B to check the session messages to ensure that no new sessions performed write operations.

Create a reverse data migration task and start it to migrate subsequent incremental data from target Instance database B to source instance database

7. A developer received a response code of 409 when trying to use a KMS key via the API.

Given that a 409 response was returned, which of these states could the KMS key be in? (Number of correct answers: 3)

PendingDeletion

Pendinglmport

Disabled

PendingCreate

8. 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?

Syslog

Web Tracking

Kafka

Logslash

9. 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

10. A developer creates a MySQL database service on a Linux ECS instance (ECS-A), and wants to access this database service from another instance (ECS-B) in the same VPC using the private IP address bound to the ECS instance, however, the connection can't be established.

What could cause this? (Number of correct answers: 2)

The security group for ECS-A does not have the default MySQL service port open.

The built-in firewall on ECS-A has rules that prohibit external access to the MySQL service port.

No Internet IP address is configured for ECS-

The bind-address parameter set in the my.ini configuration file of the MySQL service is commented out.

11. By default, Function Compute creates an instance for each request Function compute allows you to create multiple instances concurrently to reduce costs and improve execution efficiency

Which of the following scenarios is NOT suitable for enabling the feature of handling multiple requests on a single instance? (Number of correct answers: 2)

The function has a shared state and cannot be accessed concurrently.

Requests are waiting for responses from the downstream service for an extended period of time.

A request consumes a large amount of CPU and memory resources.

Functions processes independent data objects.

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

HTTP(s) service

CloudMonitor Service

Resources In a VPC

Function Compute

Log service

13. 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.

14. Which of the following descriptions of Alibaba Cloud ECS storage are correct? (Number of correct answers: 3)

Alibaba Cloud provides a wealth of block storage products for ECS, including Cloud Disks (virtualized storage) and Local Disks (physically attached to the server(s) that host your ECS Instances).

Both Local Disks and Cloud Disks use a multi-copy distributed storage mechanism, which has low latency, high performance, durability, and high reliability, and supports creation, expansion and release at any time.

Cloud Disks come In several different varieties: ESSD (Enhanced Solid State) Cloud Disks. SSD (Solid State) Cloud Disks, and high-efficiency Cloud Disks.

Two types of Cloud Disks can be attached to an ECS: System Disks and Data Disks. System Disks host the ECS instances operating system.

15. 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.

16. 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.

17. 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)

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

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

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

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

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

EmptyDir

NFS

ConfigFile

FixedVolume

19. What migration features does Alibaba Cloud SMC (Server Migration Center) support? (Number of correct answers: 3)

Supports incremental data migration

Supports batch migration

Supports migration from virtual machines to physical machines

Supports migration to Container Registry

Supports all versions Microsoft Windows

20. 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

Page 2 of 2

21. A developer runs a web application on a physical machine in an IDC. The machine is running Ubuntu Linux.

Which of the following is the recommended method if he wants to migrate this web application onto an Alibaba Cloud ECS instance?

Use a third-party image creation tool to create an image from the physical server. Upload the image to the ECS console to turn it into a custom image. Then, use the custom image to create ECS instances.

Use SMC(Server Migration Center) to collect data from the origin physical server. Create an intermediate ECS instance on Alibaba Cloud and wait for the data transfer to complete. Then generate a new image directly from that intermediate ECS instance.

Use a third-party image creation tool to create an image from the physical server. The image is then uploaded to Alibaba Cloud Object Storage Service (OSS) for storage. In the ECS console, import that image from OSS, then, create an ECS instance from the custom image.

22. What are the required parameters for the Python SDK to create a client to access Alibaba Cloud's API? (Number of correct answers: 3)

access.keyjd

access.key.secret

regionjd

zone jd

vpcjd

23. When a developer uses the LogGroup function to package multiple logs and writes data through the API/SDK of the Log Service, it receives error code 403 or 500 continiously.

What are the possible reasons?

The "Topic" data field is empty

The log size written to log group is less than 5MB

The target partition in the Logstore is not specified

Insufficient space in the Logstore partition

24. Which of these are good ways to secure access to your API deployed on Alibaba Cloud API Gateway?

(Number of correct answers: 3)

Enable API Gateway to connect to backend services in an Alibaba Cloud VPC network group. This guarantees the security of API requests.

Configure security keys for API Gateway.

Use HTTPS to encrypt requests.

Use OpenID Connect to authenticate requests.

Allow only internal IP addresses to call the AP

25. As more businesses move online and collect more data about their users, databases are beginning to grow very large, affecting table query performance and business operations. In order to solve these problems, in addition to sub-database sub-table transformation, we can also use Data Management Service (DMS)'s archiving function to regularly archive large table data. We can then remove the archived records from the original table to improve query performance.

Which of these statements about this feature of DMS is NOT correct?

The supported database types are RDS MySQL and PolarDB MySQL

Before you can use this feature of DMS, you must first enable Alibaba Cloud's Database Backup Service (DBS)

Backup data can be stored In OSS

The user role of this operation must be 'administrator" or "DBA"

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

Elastic Compute Service (ECS)

Object Storage Service (OSS)

Relational Database Service (RDS)

Server Load Balancer (SLB)

27. Which of the following features are unique to Alibaba Cloud Container Registry, as compared with Docker Hub? (Number of correct answers: 2)

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.

28. 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)

ACL

RAM Policy

Bucket Policy

STS authorization

Dynamic blacklist

Object Policy

Intranet Access

29. 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

30. 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

31. 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

32. 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.

33. 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

34. 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)

35. 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

36. 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

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

Region name

Zone name

Bucket name

Filename

38. 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.

Alibaba Developer ACA-Developer Exam Free Dumps

Alibaba Developer ACA-Developer Exam Free Dumps

Share this post

Leave a Reply Cancel reply

Related Posts