New 2022 Realistic Free Alibaba Cloud ACA-Developer Exam Dump Questions & Answer
ACA-Developer Practice Test Engine: Try These 97 Exam Questions
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NEW QUESTION 34
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. OceanBase
- B. HBase
- C. RDSMariaDB
- D. TSDB
Answer: C
NEW QUESTION 35
Which of these are suitable use cases for Alibaba Cloud's MongoDB service? (Number of correct answers: 3)
- A. Applications requiring high OPS, such as logging apps
- B. Scenarios where complex transaction support is required
- C. Applications requiring geo-location queries, such as logistics or order status apps
- D. Applications where JSON is a good choice of storage format
Answer: A,B,C
NEW QUESTION 36
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?
- A. The API callers account and password are not authorized for ECS access.
- B. The ECS instance name conflicts with other instance names.
- C. The user's Alibaba Cloud account has not passed real name authentication
- D. The ECS instance name violates the ECS service's naming conventions.
Answer: A
NEW QUESTION 37
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 38
In PolarDB, if an UPDATE SQL statement encounters an issue, you need to check the execution plan to figure out the root cause. However, in the production environment, to avoid affecting the production data, what statement should you use to view the execution plan? (Number of correct answers: 2)
- A. explain SQL
- B. explain analyze SQL
- C. explain analyze verbose SQL
- D. explain verbose SQL
Answer: B,D
NEW QUESTION 39
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. Use OpenID Connect to authenticate requests.
- C. Configure security keys for API Gateway.
- D. Enable API Gateway to connect to backend services in an Alibaba Cloud VPC network group. This guarantees the security of API requests.
- E. Use HTTPS to encrypt requests.
Answer: A,D,E
NEW QUESTION 40
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. 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.
- B. 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 .
- 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. 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
Answer: D
NEW QUESTION 41
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. Two-way data synchronization
- B. Incremental data migration
- C. Full data migration
- D. One-way data synchronization
Answer: C
NEW QUESTION 42
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. Quickly build a small e-commerce website
- B. Quickly build serverless site using Function Compute
- C. Quickly build a personal, learning, or test environment
- D. Quickly build a personal blog website
- E. Set up a NoSQL database service
Answer: B,C,D
NEW QUESTION 43
A developer was sending a request to Key Management Service (KMS) through the KMSAPI interface, and found that the key management service cannot be accessed. What is a possible reason?
- A. The HTTPS protocol is not enabled
- B. The user key master key is in Pendinglmport state
- C. The user key master key is in PendingDeletion state
- D. User key master key is in Disabled state
Answer: C
NEW QUESTION 44
Which of the following statements describe the trace/D and spanID in a service tracking system (such as Zipkin) correctly? (Number of correct answers: 3)
- A. Spanld can locate the position of a request in the system call, and who its upstream and downstream dependencies are respectively.
- B. When the user's request enters the system, a globally unique traceld will be generated on the first layer of the calling network.
- C. The tracelD will be called with each layer and passed back continuously, so through traceld, the path of a user request in the system can be connected in series.
- D. Traceld is used to distinguish the sequence of calls between different services of the system, spanld is used to concatenate all the paths that a certain request traverses in the system.
Answer: A,B,D
NEW QUESTION 45
Which of the following features are unique to Alibaba Cloud Container Registry, as compared with Docker Hub? (Number of correct answers: 2)
- A. Container Registry can automatically build new Docker images when source code changes.
- B. 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.
- C. You can set your image repository access to public or private.
- D. You can create and delete image repositories in different regions based on your needs.
Answer: B,C
NEW QUESTION 46
Alibaba Cloud Link Tracing Analysis supports call link reporting based on the Open Tracing standard. Which of the following client types does link tracing support? (Number of correct answers:3)
- A. Skywalklng
- B. Zipkln
- C. Jaeger
- D. Pinpoint
Answer: C
Explanation:
Explanation
https://www.alibabacloud.com/blog/opentracing-implementation-of-jaeger_594957
NEW QUESTION 47
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 48
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)
- A. Requests are waiting for responses from the downstream service for an extended period of time.
- B. Functions processes independent data objects.
- C. A request consumes a large amount of CPU and memory resources.
- D. The function has a shared state and cannot be accessed concurrently.
Answer: A,D
NEW QUESTION 49
Which of the following statements about migrating data into and out of Object Storage Service (OSS) are correct? (Number of correct answers: 3)
- A. Online migration supports both migrating buckets at a time, and migrating all the data under an Alibaba Cloud account at a single time.
- B. You cannot migrate data between OSS buckets if the data at the source is stored in a bucket of the Archive type.
- C. A migration job occupies the network resources of the source and the destination. To ensure business continuity, we recommend that you specify a rate limit for a migration Job or run the migration job during an off-peak period.
- D. You can migrate data between OSS buckets in any of the following conditions: Buckets are located within the same region, buckets are located across regions and buckets belong to different Alibaba Cloud accounts.
Answer: A,B,D
NEW QUESTION 50
A game company is developing a game application for the Apple and Android platforms. Currently, this application stores user data (as flat files) securely on the local storage of a user's device. The game company wants to provide a new feature that allows customers to play the same game on different devices, which requires synchronizing user data between different devices. Which of the following cloud services supports this requirement without creating a new back-end application?
- A. Log service
- B. Function Compute
- C. Table Store
- D. Object Storage Service (OSS)
Answer: B
NEW QUESTION 51
Which of the following are types of backend services that API Gateway supports? (Number of correct answers: 3)
- A. HTTP(s) service
- B. Log service
- C. Function Compute
- D. Resources In a VPC
- E. CloudMonitor Service
Answer: A,D,E
NEW QUESTION 52
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?
- A. The "Topic" data field is empty
- B. The log size written to log group is less than 5MB
- C. The target partition in the Logstore is not specified
- D. Insufficient space in the Logstore partition
Answer: D
NEW QUESTION 53
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