[Dec-2021] ACA-Developer Dumps Full Questions - Alibaba Developer Exam Study Guide
Exam Questions and Answers for ACA-Developer Study Guide
Alibaba Cloud ACA-Developer Exam Syllabus Topics:
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NEW QUESTION 51
Which of the following are correct, regarding RAM users? (Number of correct answers: 3)
- A. 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.
- B. RAM users can be created under a single Alibaba Cloud account, corresponding to employees, systems, or applications.
- C. 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.
- D. 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).
Answer: A,B,C
NEW QUESTION 52
Which of the following configurations cannot improve the stability, reliability or availability of an Alibaba Cloud Scaling Group? (Number of correct answers: 3)
- A. Select multiple VPCs when creating the scaling group
- B. In the process of creating a Scaling Group, associate multiple Server Load Balancers
- C. When creating the scaling group, select multiple Vswitches in multiple Zone within a Region
- D. Choose a variety of different ECS types when creating your Scaling Configuration
Answer: A,B,D
NEW QUESTION 53
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 gist index for multiple fields.
- B. Create a b-tree index on each column to be searched.
- C. Create a hash index on each column to be searched.
- D. Create a gin index for multiple fields.
Answer: B
NEW QUESTION 54
Which of the following database connection methods does ApsaraDB for Redis support? (Number of correct answers: 2)
- A. aliyun-cll
- B. DMS (Data Management Service)
- C. Sentinel
- D. Redis-cIl
Answer: C,D
NEW QUESTION 55
Which of the following errors may occur when you access an image stored in Object Storage Service, and attach an image processing URL parameter to the URL ? (Number of correct answers: 3)
- A. NoSuchStyle
- B. NoSuchBucket
- C. NoSuchKey
- D. NoSuchFile
- E. NoSuchObject
Answer: B,C,D
NEW QUESTION 56
Which of the following programming languages are supported by the Alibaba Cloud SDK? (Number of correct answers: 3)
- A. PHP
- B. Bash shell
- C. Swift
- D. Java
- E. Python
Answer: A,D,E
Explanation:
Explanation
https://www.alibabacloud.com/help/doc-detail/74712.htm
NEW QUESTION 57
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 58
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 59
CloudMonitor's "Event Monitoring" feature provides you with event reporting, query, and alarm functions, Score 2 so that you can collect metrics on your running Alibaba Cloud systems, and receive alerts when something goes wrong. Which of these is NOT a correct description of the monitoring event types supported by CloudMonitor?
- A. For ECS, CloudMonitor supports the collection and reporting of important ECS operating system level events, such as application crashes.
- B. For E-MapReduce, CloudMonitor supports the collection and reporting of service component status, cluster creation failure, and timeout events.
- C. For Object Storage Service (OSS), CloudMonitor supports the collection and reporting of bucket upstream and downstream bandwidth which exceeds the flow control threshold or the user-selected reporting threshold.
- D. For Server Load Balancer (SLB), CloudMonitor supports the collection and reporting of HTTPS certificate expiration events, for certificates installed on SLB.
Answer: D
NEW QUESTION 60
A company has some new content that needs to be promoted (such as new features, new activities, new games, or new articles). In order to achieve the overall promotion goal, the operating staff will select various channels for promotion (including standard HTML/HTML5 (desktop), iOS, and Android). You are using Alibaba Cloud's Log Service: in order to ascertain the effectiveness of content promotion accurately and in real time, which log collection method should you use, as a developer?
- A. Syslog
- B. Logslash
- C. Web Tracking
- D. Kafka
Answer: A
NEW QUESTION 61
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 62
When using Alibaba Cloud CDN, a visitor's request will first be routed to a CDN edge node, and in the event of a cache miss at this edge node, the node will fetch data from the origin site (back-to-source request). Even with this redirection, it is possible for the origin site to see the visitors real IP address. Which of the following statements about obtaining the visitor's real IP address are correct? (Number of correct answers: 2)
- A. You can activate the "record visitor's real IP" function in the Alibaba Cloud CDN console, then you can directly view visitor's IP addresses from the Alibaba Cloud CDN access logs.
- B. In Windows, if IIS is used, after installing the "F5XForwardedFor" extension module, the visitor's real IP address can be seen via IIS logs.
- C. A visitor's real IP address is stored in the "X-Forwarded-For" HTTP header It can be directly obtained via Apache or NGINX logs.
- D. A visitor's real IP address can only be obtained by modifying the site or web application.
Answer: B,D
NEW QUESTION 63
A developer is making the ModifyDDInstanceSpec API call to change the specifications of an RDS instance, but the operation fails. Why could this be? (Number of correct answers: 3)
- A. The instance has a backup task being executed
- B. No instance type (specification) was included in the request parameters
- C. The targeted RDS instance is a disaster recovery instance
- D. The instance is in the running state
Answer: A,B,D
NEW QUESTION 64
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 65
For business scenarios with strong data reliability requirements or financial business scenarios with regulatory requirements related to data durability and availability, RDS MySQL provides a remote backup mechanism to improve reliability. Which of the following is correct, regarding RDS's remote disaster recovery capabilities?
(Number of correct answers: 3)
- A. When the database deletion operation is performed on the master instance, the operation will also be synchronized to the disaster recovery instance
- B. When an outage occurs in the area where the primary instance is located, and neither the primary instance (Master) nor the standby instance (Slave) can be connected to, the remote disaster recovery instance can be switched to the primary instance
- C. RDS realizes real-time synchronization between the master instance and the remote disaster recovery instance through Data Transmission Service (DTS)
- D. The primary database (the one to be backed up) must have an Alibaba Cloud Intranet address
Answer: A
NEW QUESTION 66
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. Scheduled message
- B. Ordered message
- C. Transactional message
- D. Retried message
- E. Batched message
Answer: A,C,E
NEW QUESTION 67
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. HTTP Header settings may cause cache misses.
- B. Insufficient bandwidth was selected when enabling the CDN service, causing the service capacity reach its limit too early.
- C. Cache configuration is inappropriate (ex. overly short Cache Expiry Time for popular files).
- D. The origin site has a large number of dynamic resources.
- E. When the website has low traffic, the CDN will receive fewer requests and this will result in a lower cache hit rate.
Answer: B,C,E
NEW QUESTION 68
What are the required parameters for the Python SDK to create a client to access Alibaba Cloud's API?
(Number of correct answers: 3)
- A. access.keyjd
- B. regionjd
- C. access.key.secret
- D. vpcjd
- E. zone jd
Answer: A,B,C
Explanation:
Explanation
https://www.alibabacloud.com/help/doc-detail/53090.htm
NEW QUESTION 69
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 70
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