Updated Dec 26, 2021 Certification Exam ACA-Developer Dumps - Practice Test Questions
Updated Verified ACA-Developer dumps Q&As - Pass Guarantee or Full Refund
NEW QUESTION 39
Which of the following options correctly describes CloudMonitor Custom Monitoring and Custom Events?
(Number of correct answers; 2)
- A. Custom Events are used for collection of continuous event type data, queries, and alarms.
- B. Custom Monitoring is used for periodic and continuous collection of time series monitoring data, queries, and alarms.
- C. Custom Monitoring is used for collection of non-continuous event data, such as information about ECS instance restarts.
- D. Custom Events is for periodic and continuous collection of time series monitoring data, queries, and alarms.
Answer: B,C
NEW QUESTION 40
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 user key master key is in Pendinglmport state
- B. The user key master key is in PendingDeletion state
- C. The HTTPS protocol is not enabled
- D. User key master key is in Disabled state
Answer: B
NEW QUESTION 41
Which of the following options is not included in Object Storage Service (OSS) object URLs?
- A. Bucket name
- B. Zone name
- C. Region name
- D. Filename
Answer: C
NEW QUESTION 42
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. Cloud Disks come In several different varieties: ESSD (Enhanced Solid State) Cloud Disks. SSD (Solid State ) Cloud Disks, and high-efficiency Cloud Disks.
- 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. 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.
Answer: B,C,D
NEW QUESTION 43
Which of the following statements describes AKs (Access Keys) incorrectly?
- A. AK can refer to both the AccessKey ID and the AccessKey secret
- B. AccessKey Secrets for RAM sub-accounts can be queried at any time on the Console Interface after creation
- C. You can use AK to construct an API request and the corresponding resources can be manipulated if your request successfully..
- D. An AccessKey ID and AccessKey Secret cannot be used separately
Answer: A
NEW QUESTION 44
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. Object Policy
- B. RAM Policy
- C. STS authorization
- D. Bucket Policy
Answer: C
NEW QUESTION 45
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. Read and write traffic
- B. Index traffic after index configuration
- C. Storage capacity
- D. Query analysis
Answer: A,B,C
NEW QUESTION 46
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. The target partition in the Logstore is not specified
- B. The write throughput of a single partition is limited, and the 10 MB/s write traffic exceeds
- C. There is significant network delay
- D. There is not enough space in the Logstore partition
Answer: A
NEW QUESTION 47
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. OSS
- B. Log Service
- C. Redis
- D. RDS
Answer: C
NEW QUESTION 48
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. A visitor's real IP address can only be obtained by modifying the site or web application.
- C. In Windows, if IIS is used, after installing the "F5XForwardedFor" extension module, the visitor's real IP address can be seen via IIS logs.
- D. 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.
Answer: B,C
NEW QUESTION 49
Which of the following statements are correct, with regard to Alibaba Cloud Log Service? (Number of correct answers: 3)
- A. Each log written to the Log Service backend will be saved in triplicate (across three separate physical servers)
- B. The Log Service frontend service adopts an LVS + NGINX architecture
- C. As an agent for collecting logs, Logtail can collect logs from existing system log files in a non-intrusive manner
- D. 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
Answer: A,B,D
NEW QUESTION 50
Which of the following data volume types is not supported by Elastic Container Instance (ECI)?
- A. FixedVolume
- B. EmptyDir
- C. NFS
- D. ConfigFile
Answer: B
NEW QUESTION 51
Serverless Workflow allows you to orchestrate distributed tasks in sequence, branch, and parallel modes, and ensure that tasks are reliably coordinated according to your workflow logic. Which of the following service integration modes is not supported by Serverless Workflow?
- A. Asynchronous mode
- B. Request response mode
- C. Waiting for callback mode
- D. Synchronization mode
Answer: D
NEW QUESTION 52
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. Applications where JSON is a good choice of storage format
- C. Scenarios where complex transaction support is required
- D. Applications requiring high OPS, such as logging apps
Answer: A,C,D
NEW QUESTION 53
Which of the following options is correct, regarding Object ACL in Alibaba Cloud's Object Storage Service (OSS)?
- A. 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.
- 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. 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.
Answer: A
NEW QUESTION 54
When versioning is enabled for an OSS Bucket, previous versions of objects will be retained, using storage space and incurring additional costs. How can you save space and reduce costs, while retaining some of the benefits of object versioning?
- A. Use the Function Compute Service to regularly check for and delete old versions of objects.
C Use OSS s built in lifecycle management capabilities to automatically delete old versions of objects after a set time. - B. Avoid using version management.
- C. Use OSS's built in lifecycle management capabilities to move old versions of objects to Archival Storage.
Answer: C
NEW QUESTION 55
Which of the following programming languages are supported by the Alibaba Cloud SDK? (Number of correct answers: 3)
- A. PHP
- B. Swift
- C. Bash shell
- D. Java
- E. Python
Answer: A,D,E
Explanation:
Explanation
https://www.alibabacloud.com/help/doc-detail/74712.htm
NEW QUESTION 56
What are the benefits of creating indexes on PolarDB? (Number of correct answers: 2)
- A. Reduce invalid data scanning.
- B. Improve the efficiency of DDL operations.
- C. Improve the query efficiency SELECT statements.
- D. Improve the efficiency of DML operations such as UPDATE.
Answer: A,C
NEW QUESTION 57
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 58
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. TSDB
- B. HBase
- C. RDSMariaDB
- D. OceanBase
Answer: C
NEW QUESTION 59
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. Insufficient space in the Logstore partition
- B. The "Topic" data field is empty
- C. The target partition in the Logstore is not specified
- D. The log size written to log group is less than 5MB
Answer: A
NEW QUESTION 60
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