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NEW QUESTION 11
In Alibaba Cloud RocketMQ, messages are kept for up to _____ days. We recommend configuring a monitoring service to watch the consumption status, and intervene manually when ''not consumed but to be deleted'' message alarms occur.
- A. 0
- B. 1
- C. 2
- D. 3
Answer: B
NEW QUESTION 12
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?
- A. One-way data synchronization
- B. Two-way data synchronization
- C. Incremental data migration
- D. Full data migration
Answer: D
NEW QUESTION 13
Which of the following statements about PolarDB's endpoint(s) is NOT correct?
- A. Through a cluster endpoint, applications can connect to data nodes.
- B. The endpoint of the PolarDB MySQL database includes the cluster endpoint and the primary endpoint.
- C. Cluster endpoints support read/write splitting.
- D. The primary endpoint supports read/write splitting.
Answer: C
NEW QUESTION 14
Which of the following descriptions of Alibaba Cloud ECS storage are correct? (Number of correct answers:
3)
- A. Two types of Cloud Disks can be attached to an ECS: System Disks and Data Disks. System Disks host the ECS instances operating system.
- B. 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.
- C. Cloud Disks come In several different varieties: ESSD (Enhanced Solid State) Cloud Disks. SSD (Solid State ) Cloud Disks, and high-efficiency Cloud Disks.
- D. 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).
Answer: B,C,D
NEW QUESTION 15
You have a Java application with source code stored on GitHub. Now you want to build a container image using this code, and store it on a Container Registry instance located in Mainland China. Which of the following is the simplest, lowest maintenance option?
- A. Associate your Alibaba Cloud Container Registry instance with your GitHub repository, and upload the Java code and Dockerfile to GitHub Set u Jenkins environment to automate the process of building the container image and pushing it to your Container Registry instance.
- B. Associate your Alibaba Cloud Container Registry instance with your GitHub repository, and upload the Java code and Dockerfile to GitHub Th Container Registry's built-in build service, configuring a rule that will rebuild your container image whenever your GitHub code is updated
- C. Download the Java code from GitHub to your laptop, build the Docker image using a local Dockerfile, and use docker push to upload It to Container Registry.
- D. Upload the Dockerfile to GitHub for version control, then download it together with the Java code to your local device, compile and pack container image, and upload the image to Alibaba Cloud Container Registry via docker push .
Answer: B
NEW QUESTION 16
Which of these are good ways to secure access to your API deployed on Alibaba Cloud API Gateway?
(Number of correct answers: 3)
- A. Configure security keys for API Gateway.
- B. Use OpenID Connect to authenticate requests.
- C. Enable API Gateway to connect to backend services in an Alibaba Cloud VPC network group. This guarantees the security of API requests.
- D. Use HTTPS to encrypt requests.
- E. Allow only internal IP addresses to call the API.
Answer: C,D,E
NEW QUESTION 17
Which of the following options are correct for Multipart Upload and Resumable Upload in Object Storage Service (OSS)? (Number of correct answers: 3)
- A. 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
- B. Use Multipart Upload to upload parts of a file in parallel to speed up the upload process
- C. If the upload fails due to an accident during the uploading of fragments, you need to upload all the fragments again
- D. Multipart Upload is usually used when the size of the file to be uploaded is large
Answer: B,C,D
NEW QUESTION 18
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)
- A. Storage capacity
- B. Read and write traffic
- C. Index traffic after index configuration
- D. Query analysis
Answer: A,B,C
NEW QUESTION 19
When using the Alibaba Cloud CLI, what is the default data format for responses, when executing queries such as "aliyun ecs Describelnstances"?
- A. YAML
- B. JSON
- C. XML
- D. TABLE
Answer: B
NEW QUESTION 20
When you use SQL statements to access tables in a database without an index configured, a full table scan will be performed. If a table contains a large amount of data, this kind of scan will access a large amount of data and consume a lot of the database's resources. Which of the following options are best practices when creating database indexes? (Number of correct answers: 3)
- A. Applies indices to fields that contain many records.
- B. Apply indexing to fields of fixed length (preferably not long fields).
- C. Add an index to a field that is frequently queried but does not frequently perform add, delete, or modify operations.
- D. table should not contain more than 6 indexed fields.
- E. Adhere to the rightmost prefix principle when using composite indexes.
Answer: A,B,C
NEW QUESTION 21
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)
- A. Batched message
- B. Scheduled message
- C. Retried message
- D. Transactional message
- E. Ordered message
Answer: A,B,D
NEW QUESTION 22
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?
- A. 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.
- B. 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.
- C. 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.
Answer: C
NEW QUESTION 23
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?
- A. Elastic Compute Service (ECS)
- B. Elastic Container Instance (ECI)
- C. Simple Application Server (SAS)
- D. Alibaba Cloud Container Service for Kubernetes (ACK)
Answer: C
NEW QUESTION 24
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. Configure a life cycle rule that matches the entire bucket, and delete all files after one day
- B. Call the API from a script, deleting files in batches
- C. Directly delete the bucket
- D. Manually delete them one by one
Answer: D
NEW QUESTION 25
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. RDS
- B. Log Service
- C. OSS
- D. Redis
Answer: D
NEW QUESTION 26
Elastic Container instance (ECI) is an agile, secure, serverless service for running containers. If you need to configure public network access for ECI, which of these are reasonable solutions? (Number of correct answers: 3)
- A. Specify a public IP address when creating the ECI.
- B. Bind an Elastic IP (EIP) to the ECI instance.
- C. Bind a NAT gateway and an EIP to the VPC to which the ECI belongs.
- D. Configure ECI as a backend for a Server Load Balancer (SLB) that has a public IP address.
Answer: A,C,D
NEW QUESTION 27
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)
- A. vpcld
- B. vSwitchlds
- C. securityGroupId
- D. ENIID
Answer: A,B,C
Explanation:
Explanation
Specifies whether to allow functions to access VPC resources.
* On: Functions can access VPC resources.
If you turn on the switch, you must set the following parameters:
* VPC: Select a VPC.
* Vswitches: Select one or more vSwitches.
* Security Group: Select the security group with which your ENI is associated.
* Off: Functions cannot access VPC resources.
https://www.alibabacloud.com/help/doc-detail/72959.htm
NEW QUESTION 28
Which of the following descriptions of the principles of Alibaba Cloud SSL certificate private key protection is correct?
- A. Alibaba Cloud Certificate Service keys are loaded Into memory in plaintext format ONLY when needed
- B. The plaintext of Alibaba Cloud's private key is usually stored on disk and backed up regularly
- C. Alibaba Cloud Certificate Service uses symmetric encryption to save the certificate private key
- D. Alibaba Cloud uses the built-in functionality of the SSL certificate service to encrypt and store the private key to certificates private key
Answer: B
NEW QUESTION 29
What are the advantages of using Elastic Container Instance (ECI) to deploy applications compared with using ECS? (Number of correct answers; 2)
- A. Low maintenance, low costs
- B. Startup in seconds without the need to reserve resources
- C. Stronger isolation between instances
- D. Less significant visualization layer performance losses
Answer: A,B
NEW QUESTION 30
Which of the following features are unique to Alibaba Cloud Container Registry, as compared with Docker Hub? (Number of correct answers: 2)
- A. You can create and delete image repositories in different regions based on your needs.
- B. You can set your image repository access to public or private.
- C. 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.
- D. Container Registry can automatically build new Docker images when source code changes.
Answer: B,C
NEW QUESTION 31
Which of the following web applications are suitable for deployment on Simple Application Server (SAS), as compared with LCS? (Number of correct answers: 3)
- A. Set up a NoSQL database service
- B. Quickly build a personal, learning, or test environment
- C. Quickly build a small e-commerce website
- D. Quickly build a personal blog website
- E. Quickly build serverless site using Function Compute
Answer: B,D,E
NEW QUESTION 32
What are the benefits of creating indexes on PolarDB? (Number of correct answers: 2)
- A. Improve the efficiency of DDL operations.
- B. Reduce invalid data scanning.
- C. Improve the efficiency of DML operations such as UPDATE.
- D. Improve the query efficiency SELECT statements.
Answer: B,D
NEW QUESTION 33
During the process of backing up an RDS database, a developer found that the backup failed. What might cause this to happen?
- A. DDL operations were performed during the backup
- B. DML operations were performed during the backup
- C. The database instance is not stopped
- D. DCL operations were performed during the backup
Answer: B
NEW QUESTION 34
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