[Jan-2022] Pass ACA-Developer Exam in First Attempt UpdatedACA-Developer RealExamFree Exam Question
Alibaba Developer Dumps ACA-Developer Exam for Full Questions - Exam Study Guide
Alibaba Cloud ACA-Developer Exam Syllabus Topics:
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NEW QUESTION 26
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. Object Policy
- C. Bucket Policy
- D. STS authorization
Answer: D
NEW QUESTION 27
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 28
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 29
Which of these are suitable use cases for Alibaba Cloud's ApsaraDB for Redis service? (Number of correct answers: 3)
- A. Online gaming user rankings (scoreboard)
- B. E-Commerce sales & promotions
- C. Enterprise OA system
- D. Live video chat system
Answer: A,C,D
NEW QUESTION 30
You can create an event notification rule in Message Service and push notifications to the specified consumer in the form of messages, to receive events from specified Alibaba Cloud resources. Which of the following options are correct statements about the Message Service (MS) service? (Number of correct answers: 2)
- A. Event Notifications can cross regions.
- B. The consumer type of the event notification message can be HTTP Server, Queue, or Topic.
- C. The event notification message is retained within the valid time. When you fail to receive an event message, the event notification message is retried based on the specified retry policy.
- D. Message Service provides synchronous notifications to ensure the consistency between the message acknowledgment and event processing.
Answer: C,D
NEW QUESTION 31
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. SLS trigger(s)
- B. MNS topic trigger(s)
- C. CloudMonitor trigger(s)
- D. OSS event trigger(s)
Answer: C
NEW QUESTION 32
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 33
A job hunting website stores user's resumes in Object Storage Service (OSS) The current resume upload process is as follows:
7. Users upload resumes
2. The server responds to the upload request
3. The resume is uploaded to the server
4. 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. Append Upload
- B. Simple Upload
- C. Multipart Upload
- D. Form Upload
Answer: A
NEW QUESTION 34
Which of the following data volume types is not supported by Elastic Container Instance (ECI)?
- A. ConfigFile
- B. NFS
- C. FixedVolume
- D. EmptyDir
Answer: D
NEW QUESTION 35
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 not enough space in the Logstore partition
- B. The target partition in the Logstore is not specified
- C. The write throughput of a single partition is limited, and the 10 MB/s write traffic exceeds
- D. There is significant network delay
Answer: B
NEW QUESTION 36
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 37
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. Two types of Cloud Disks can be attached to an ECS: System Disks and Data Disks. System Disks host the ECS instances operating system.
- C. 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.
- 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: A,C,D
NEW QUESTION 38
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. securityGroupId
- C. vSwitchlds
- 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 39
What migration features does Alibaba Cloud SMC (Server Migration Center) support? (Number of correct answers: 3)
- A. Supports migration to Container Registry
- B. Supports incremental data migration
- C. Supports batch migration
- D. Supports all versions Microsoft Windows
- E. Supports migration from virtual machines to physical machines
Answer: A,B,C
NEW QUESTION 40
A Developer is creating a Function Compute function. This function requires around 1 GB of temporary storage for files while executing. These files will not be needed after the function is completed for a fixed period. How can this developer MOST efficiently handle the temporary files?
- A. Copy the files to NFS and delete the files when the Function Compute function call completes.
- B. Copy the files to an OSS bucket with a lifecycle policy configured to delete the files automatically.
- C. Store the files in the /tmp directory on a temporary ECS instance, and delete the files at when the Function Compute function call completes.
- D. Store the files in Cloud Disk and delete the files when Function Compute function call completes.
Answer: C
NEW QUESTION 41
Which of the following options is not included in Object Storage Service (OSS) object URLs?
- A. Region name
- B. Filename
- C. Bucket name
- D. Zone name
Answer: A
NEW QUESTION 42
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 43
What are the benefits of creating indexes on PolarDB? (Number of correct answers: 2)
- A. Improve the efficiency of DML operations such as UPDATE.
- B. Improve the query efficiency SELECT statements.
- C. Improve the efficiency of DDL operations.
- D. Reduce invalid data scanning.
Answer: B,D
NEW QUESTION 44
Which of the following descriptions describes the (Security Token Service) STS service correctly? (Number of correct answers: 3)
- A. A STS request consists of an access address, communication protocol, request method, request parameters and character encoding
- B. The STS service supports the use of both HTTP and HTTPS protocols
- C. Through the STS service, RAM users or RAM roles can obtain a temporary token that allows them to call the Alibaba Cloud API or use the web console
- D. When calling the STS API, in order to ensure the safe calling of the API, Alibaba Cloud will authenticate each API request through a signature when each API call is made
Answer: A,B,D
NEW QUESTION 45
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