Get New 2022 Valid Practice Alibaba Developer ACA-Developer Q&A - Testing Engine [Q31-Q45]

NEW QUESTION 31
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.

NEW QUESTION 32
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.

NEW QUESTION 33
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)

NEW QUESTION 34
Which of the following programming languages are supported by the Alibaba Cloud SDK? (Number of correct answers: 3)

Java

Swift

PHP

Python

Bash shell

NEW QUESTION 35
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

NEW QUESTION 36
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.

NEW QUESTION 37
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

NEW QUESTION 38
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

NEW QUESTION 39
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

NEW QUESTION 40
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

NEW QUESTION 41
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.

NEW QUESTION 42
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-A.

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

NEW QUESTION 43
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

NEW QUESTION 44
Company A has a large number of files store in Alibaba Cloud OSS that need to be deleted (numbering in the tens of thousands). What is the fastest, easiest way to delete these files?

Manually delete them one by one

Configure a life cycle rule that matches the entire bucket, and delete all files after one day

Call the API from a script, deleting files in batches

Directly delete the bucket

NEW QUESTION 45
Which of the following operations can be performed through Log Service sAPI? (Number of correct answers:
3)

Collect logs based on Logtail configuration and Logtail machine group information

Create a Logstore, write and read logs to the Logstore

Access control for different users

Deliver logs to OSS for storage and analysis