ACA-Developer Dumps - Grab Out For [NEW-2022] Alibaba Cloud Exam
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Alibaba Cloud ACA-Developer Exam Syllabus Topics:
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NEW QUESTION 52
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. Table Store
- B. Function Compute
- C. Log service
- D. Object Storage Service (OSS)
Answer: B
NEW QUESTION 53
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 54
Which of the following are correct, regarding RAM users? (Number of correct answers: 3)
- A. RAM users can be created under a single Alibaba Cloud account, corresponding to employees, systems, or applications.
- B. 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).
- 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 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.
Answer: A,C,D
NEW QUESTION 55
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 56
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 57
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. Full data migration
- B. Incremental data migration
- C. One-way data synchronization
- D. Two-way data synchronization
Answer: A
NEW QUESTION 58
Which of the following is NOT required for SMC (Server Migration Center) to migrate a server to Alibaba Cloud?
- A. Import the migration source information to the SMC console.
- B. The SMC client transfers the source data to an intermediate ECS instance.
- C. From the SMC console, configure the type of disk image to be generated during the migration.
- D. The SMC backend service generates a target Alibaba Cloud image based on the migration source.
Answer: A
NEW QUESTION 59
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. CloudMonitor trigger(s)
- B. SLS trigger(s)
- C. MNS topic trigger(s)
- D. OSS event trigger(s)
Answer: A
NEW QUESTION 60
A developer creates a MySQL database service on a Linux ECS instance (ECS-A), and wants to access this database service from another instance (ECS-B) in the same VPC using the private IP address bound to the ECS instance, however, the connection can't be established. What could cause this? (Number of correct answers: 2)
- A. The bind-address parameter set in the my.ini configuration file of the MySQL service is commented out.
- B. The built-in firewall on ECS-A has rules that prohibit external access to the MySQL service port.
- C. The security group for ECS-A does not have the default MySQL service port open.
- D. No Internet IP address is configured for ECS-A.
Answer: A,D
NEW QUESTION 61
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 hash index on each column to be searched.
- B. Create a b-tree index on each column to be searched.
- C. Create a gist index for multiple fields.
- D. Create a gin index for multiple fields.
Answer: B
NEW QUESTION 62
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 63
Company A has a large number of files store in Alibaba Cloud OSS that need to be deleted (numbering in the tens of thousands). What is the fastest, easiest way to delete these files?
- A. Call the API from a script, deleting files in batches
- B. Manually delete them one by one
- C. Directly delete the bucket
- D. Configure a life cycle rule that matches the entire bucket, and delete all files after one day
Answer: B
NEW QUESTION 64
On which operating systems can you install Alibaba Cloud command line tools? (Number of correct answers:
3)
- A. Android
- B. macOS
- C. Linux
- D. Windows
Answer: B,C,D
Explanation:
Explanation
https://www.alibabacloud.com/blog/how-to-manage-your-alibaba-cloud-linux-server-from-the-command-line-in
NEW QUESTION 65
Log Service uses a semi-structured data model to define a log. This mode contains five data fields:
Topic, Time, Content, Source, and Tags. Log Service has different requirements for the format of each field in the log. Which of the following fields cannot be empty characters? (Number of correct answers: 4)
- A. Tags
- B. Source
- C. Time
- D. Content
- E. Topic
Answer: A,B,C,E
NEW QUESTION 66
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 67
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 68
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 69
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