Alibaba Cloud ACA-Developer 問題練習

Question No : 1
Which of the following operations can be performed through Log Service sAPI? (Number of correct answers: 3)

• A.Collect logs based on Logtail configuration and Logtail machine group information
• B.Create a Logstore, write and read logs to the Logstore
• C.Access control for different users
• D.Deliver logs to OSS for storage and analysis

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Question No : 2
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?

• A.There is significant network delay
• B.The write throughput of a single partition is limited, and the 10 MB/s write traffic exceeds
• C.There is not enough space in the Logstore partition
• D.The target partition in the Logstore is not specified

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Question No : 3
A certain project of Enterprise A (called Project-X) moves to the cloud and will need to use a variety of s Alibaba Cloud resources, such as ECS instances, RDS instances, SLB instances, and OSS storage space. There are multiple employees on the project who need to operate these cloud resources.
Because each employee has different job responsibilities and requires different permissions, what is the WRONG approach to resource management?

• A.Create RAM users each employee, and set login passwords or create AccessKey credentials as needed
• B.When creating RAM for users, give each user both web console AND AccessKey credentials: there is no need to keep these separate
• C.When there are multiple RAM users under a cloud account, create user groups to classify and authorize RAM users with the same responsibilities
• D.Use system policies to bind reasonable permissions policies to users or user groups, and customize policies for more fine-grained control

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Question No : 4
you have a Node.js based application and you plan to migrate it to Alibaba Cloud Function Compute, which of the following steps is unnecessary?

• A.Manually install the Node. Js package in the Function Compute console
• B.Create a single web application and upload the corresponding code package via the Function Compute console (or fcli)
• C.Configure program startup commands and access ports in the Function Compute console
• D.Start and verify the application in the Function Compute console

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Question No : 5
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?

• A.Manually delete them one by one
• B.Configure a life cycle rule that matches the entire bucket, and delete all files after one day
• C.Call the API from a script, deleting files in batches
• D.Directly delete the bucket

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Question No : 6
Which of the following programming languages are supported by the Alibaba Cloud SDK? (Number of correct answers: 3)

• A.Java
• B.Swift
• C.PHP
• D.Python
• E.Bash shell

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正解:
Explanation:
https://www.alibabacloud.com/help/doc-detail/74712.htm

Question No : 7
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?

• A.HBase
• B.OceanBase
• C.RDSMariaDB
• D.TSDB

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Question No : 8
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?

• A.OSS
• B.RDS
• C.Redis
• D.Log Service

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Question No : 9
On which operating systems can you install Alibaba Cloud command line tools? (Number of correct answers: 3)

• A.Windows
• B.Linux
• C.macOS
• D.Android

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正解:
Explanation: https://www.alibabacloud.com/blog/how-to-manage-your-alibaba-cloud-linux-server-from-the-command-line-interface-%28cli%29_593878

Question No : 10
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)?

• A.Create a b-tree index on each column to be searched.
• B.Create a hash index on each column to be searched.
• C.Create a gin index for multiple fields.
• D.Create a gist index for multiple fields.

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Question No : 11
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)

• A.When the website has low traffic, the CDN will receive fewer requests and this will result in a lower cache hit rate.
• B.Insufficient bandwidth was selected when enabling the CDN service, causing the service capacity reach its limit too early.
• C.HTTP Header settings may cause cache misses.
• D.The origin site has a large number of dynamic resources.
• E.Cache configuration is inappropriate (ex. overly short Cache Expiry Time for popular files).

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Question No : 12
Which of the following database connection methods does ApsaraDB for Redis support? (Number of correct answers: 2)

• A.DMS (Data Management Service)
• B.aliyun-cll
• C.Redis-cIl
• D.Sentinel

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Question No : 13
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?

• A.Simple Upload
• B.Form Upload
• C.Multipart Upload
• D.Append Upload

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Question No : 14
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?

• A.RAM Policy
• B.STS authorization
• C.Bucket Policy
• D.Object Policy

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Question No : 15
Which of the following statements are correct, with regard to Alibaba Cloud Log Service? (Number of correct answers: 3)

• A.As an agent for collecting logs, Logtail can collect logs from existing system log files in a non-intrusive manner
• B.The Log Service frontend service adopts an LVS + NGINX architecture
• C.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
• D.Each log written to the Log Service backend will be saved in triplicate (across three separate physical servers)

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