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Alibaba Cloud ACA-Developer Exam Syllabus Topics:
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NEW QUESTION 21
Which of the following statements are correct, with regard to Alibaba Cloud Log Service? (Number of correct answers: 3)
- A. 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
- B. As an agent for collecting logs, Logtail can collect logs from existing system log files in a non-intrusive manner
- C. The Log Service frontend service adopts an LVS + NGINX architecture
- D. Each log written to the Log Service backend will be saved in triplicate (across three separate physical servers)
Answer: A,C,D
NEW QUESTION 22
Which of the following options is correct, regarding Object ACL in Alibaba Cloud's Object Storage Service (OSS)?
- A. You can set the ACL associated with an object by examining the X-OSS-Object-ACL header in the HEAD request, when making the PutObjectACL API call.
- B. "Private" indicates that an object is a private resource, that is, only the owner of the object has read and write permissions on the object, and other users can read but have no permission to modify or delete the object.
- C. If the permissions of an object are not set, the permissions of the object are inherited from the bucket.
- D. Object ACL is an object-level (not bucket level) permission control mechanism. There are currently three levels of access rights: private, public-read, and public-read-write.
Answer: D
NEW QUESTION 23
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. Create a single web application and upload the corresponding code package via the Function Compute console (or fcli)
- B. Manually install the Node. Js package in the Function Compute console
- C. Start and verify the application in the Function Compute console
- D. Configure program startup commands and access ports in the Function Compute console
Answer: B
NEW QUESTION 24
Which of the following are correct, regarding RAM users? (Number of correct answers: 3)
- A. 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).
- B. 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.
- C. 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.
- D. RAM users can be created under a single Alibaba Cloud account, corresponding to employees, systems, or applications.
Answer: B,C,D
NEW QUESTION 25
What migration features does Alibaba Cloud SMC (Server Migration Center) support? (Number of correct answers: 3)
- A. Supports all versions Microsoft Windows
- B. Supports migration from virtual machines to physical machines
- C. Supports incremental data migration
- D. Supports migration to Container Registry
- E. Supports batch migration
Answer: C,D,E
NEW QUESTION 26
When connecting to the Alibaba Cloud RDS database, in order to improve the completeness and integrity of the connection, you can enable SSL encryption and install an SSL CA certificate for the required application service. Which of the following statements are correct? (Number of correct answers: 3)
- A. Due to the way in which SSL encryption is implemented, enabling SSL encryption will significantly increase the CPU usage rate. Enable SSL encryption when there is an encryption requirement for the external network link. The intranet link is relatively safe, and generally no link encryption is required.
- B. If the RDS instance is a multi-node instance, the system will trigger the active/standby switch after the SSL service is disabled.
- C. When using read/write splitting, you can also enable SSL encryption to improve the security of the connection.
- D. It is discovered that an Alibaba Cloud RDS SSL certificate is about to expire, and the validity period needs to be updated, requiring that the certificate be updated, then reinstalled. This will restart the RDS instance.
Answer: A,B,C
NEW QUESTION 27
Function Compute supports one-way triggers and two-way triggers. Which of the following triggers is a one-way trigger? That is to say you only need to configure the trigger in the event source, not in Function Compute?.
- A. OSS event trigger(s)
- B. CloudMonitor trigger(s)
- C. SLS trigger(s)
- D. MNS topic trigger(s)
Answer: B
NEW QUESTION 28
Which of the following statements describes AKs (Access Keys) incorrectly?
- A. AccessKey Secrets for RAM sub-accounts can be queried at any time on the Console Interface after creation
- B. You can use AK to construct an API request and the corresponding resources can be manipulated if your request successfully..
- C. An AccessKey ID and AccessKey Secret cannot be used separately
- D. AK can refer to both the AccessKey ID and the AccessKey secret
Answer: D
NEW QUESTION 29
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. Upload the image to the ECS console to turn it into a custom image. Then, use the custom image to create ECS instances.
- C. 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.
Answer: B
NEW QUESTION 30
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 primary endpoint supports read/write splitting.
- C. The endpoint of the PolarDB MySQL database includes the cluster endpoint and the primary endpoint.
- D. Cluster endpoints support read/write splitting.
Answer: D
NEW QUESTION 31
Which of the following configurations cannot improve the stability, reliability or availability of an Alibaba Cloud Scaling Group? (Number of correct answers: 3)
- A. When creating the scaling group, select multiple Vswitches in multiple Zone within a Region
- B. In the process of creating a Scaling Group, associate multiple Server Load Balancers
- C. Choose a variety of different ECS types when creating your Scaling Configuration
- D. Select multiple VPCs when creating the scaling group
Answer: B,C,D
NEW QUESTION 32
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. Use system policies to bind reasonable permissions policies to users or user groups, and customize policies for more fine-grained control
- 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. When creating RAM for users, give each user both web console AND AccessKey credentials: there is no need to keep these separate
Answer: A
NEW QUESTION 33
A developer have written a web application using a microservice architecture, in such a architecture, the client (web browser or mobile application) first initiates a request. The request first reaches the load balancer, then goes through an authentication service, a billing service, then requests a resource, and finally a result is returned. How many spans does such a call chain consist of?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: C
NEW QUESTION 34
Which of these are suitable use cases for Alibaba Cloud's MongoDB service? (Number of correct answers: 3)
- A. Applications requiring geo-location queries, such as logistics or order status apps
- B. Scenarios where complex transaction support is required
- C. Applications requiring high OPS, such as logging apps
- D. Applications where JSON is a good choice of storage format
Answer: A,B,C
NEW QUESTION 35
The event monitoring feature in CIoudMonitor provides custom event monitoring functions. Which of the following data reporting methods are included? (Number of correct answers: 3)
- A. Report event monitoring through the Java SDK
- B. Report event monitoring data through the command line (CU)
- C. Report event monitoring data via HTTP
- D. Report event monitoring through the Python SDK
Answer: A,C,D
NEW QUESTION 36
Which of the following is NOT a feature of Alibaba Cloud's Cassandra database service?
- A. Centerless distributed architecture
- B. Cluster storage, strong expansion of read and write capabilities
- C. Enterprise-level capabilities such as disaster tolerance, backup and recovery, security, and monitoring across data centers
- D. Supports both narrow and wide tables, providing flexible schema functions
Answer: D
NEW QUESTION 37
Which of these are good ways to secure access to your API deployed on Alibaba Cloud API Gateway?
(Number of correct answers: 3)
- A. Allow only internal IP addresses to call the API.
- B. Enable API Gateway to connect to backend services in an Alibaba Cloud VPC network group. This guarantees the security of API requests.
- C. Configure security keys for API Gateway.
- D. Use HTTPS to encrypt requests.
- E. Use OpenID Connect to authenticate requests.
Answer: A,B,D
NEW QUESTION 38
Which of these are suitable use cases for Alibaba Cloud's ApsaraDB for Redis service? (Number of correct answers: 3)
- A. E-Commerce sales & promotions
- B. Live video chat system
- C. Online gaming user rankings (scoreboard)
- D. Enterprise OA system
Answer: B,C,D
NEW QUESTION 39
Which of the following descriptions of Alibaba Cloud ECS storage are correct? (Number of correct answers:
3)
- A. Cloud Disks come In several different varieties: ESSD (Enhanced Solid State) Cloud Disks. SSD (Solid State ) Cloud Disks, and high-efficiency Cloud Disks.
- 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. 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).
- D. Two types of Cloud Disks can be attached to an ECS: System Disks and Data Disks. System Disks host the ECS instances operating system.
Answer: A,B,C
NEW QUESTION 40
Which of the following is NOT a valid state for a scaling activity in Alibaba Cloud's Elastic Scaling Service ESS -also known as Auto Scaling) state of the scaling activity in the Alibaba Cloud elastic scaling group?
- A. Failed
- B. Timeout
- C. Rejected
- D. Executing
Answer: A
NEW QUESTION 41
Which of the following options describes the basic concepts of Alibaba Cloud Tracing Analysis correctly?
(Number of correct answers: 3)
- A. In some cases, timing diagrams based on the timeline are used to show the call chain
- B. In the OpenTracing standard, a call chain can be regarded as a directed acyclic graph (DAG) composed of multiple Spans. The relationship between spans is named References
- C. In the OpenTracing standard, each Span represents a named and timed non-continuous execution segment in the call chain
- D. Alibaba Cloud Tracing Analysis model relies on OpenTracing
Answer: B,C,D
NEW QUESTION 42
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. 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 .
- 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. 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.
- D. 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.
Answer: B
NEW QUESTION 43
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