ACA-Developer Dumps with Practice Exam Questions Answers
ACA-Developer by Alibaba Developer Actual Free Exam Practice Test
Alibaba Cloud ACA-Developer Exam Syllabus Topics:
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NEW QUESTION 54
Which of the following operations can be performed through Log Service sAPI? (Number of correct answers:
3)
- A. Access control for different users
- B. Create a Logstore, write and read logs to the Logstore
- C. Deliver logs to OSS for storage and analysis
- D. Collect logs based on Logtail configuration and Logtail machine group information
Answer: A,B,D
NEW QUESTION 55
Which of the following descriptions of the principles of Alibaba Cloud SSL certificate private key protection is correct?
- A. Alibaba Cloud Certificate Service keys are loaded Into memory in plaintext format ONLY when needed
- B. The plaintext of Alibaba Cloud's private key is usually stored on disk and backed up regularly
- C. Alibaba Cloud Certificate Service uses symmetric encryption to save the certificate private key
- D. Alibaba Cloud uses the built-in functionality of the SSL certificate service to encrypt and store the private key to certificates private key
Answer: B
NEW QUESTION 56
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 57
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. Time
- B. Tags
- C. Source
- D. Topic
- E. Content
Answer: A,B,C,D
NEW QUESTION 58
When using the Alibaba Cloud CLI, what is the default data format for responses, when executing queries such as "aliyun ecs Describelnstances"?
- A. YAML
- B. XML
- C. TABLE
- D. JSON
Answer: D
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. SLS trigger(s)
- B. MNS topic trigger(s)
- C. CloudMonitor trigger(s)
- D. OSS event trigger(s)
Answer: C
NEW QUESTION 60
Which of the following descriptions of Alibaba Cloud's SSL certificate service are correct? (Number of correct answers: 2)
- A. EV certificates are suitable for large enterprises, financial institutions, etc.
- B. Alibaba Cloud SSL Certificate Service supports the purchase of three types of certificates: DV certificates, OV certificates, and EV certificates.
- C. DV level certificates are suitable for government organizations, enterprises, educational institutions, etc.
- D. OV certificates are suitable for personal websites.
Answer: B,D
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
A developer accesses logs in a Log Service Logstore via the API. The error code returned by the server is 404.
Which of these could be the cause?
- A. Server internal error
- B. The requested digital signature does not match
- C. The log project (Project) does not exist
- D. Server is busy: please try later
Answer: C
NEW QUESTION 63
Which
of the following parameter locations should be specified for the parameter of key1 where the request URL is in the form: http://somesite.com/test?key1 =[value1] ?
- A. HTTP Header
- B. HTTP Body
- C. Query
- D. Parameter Path
Answer: D
NEW QUESTION 64
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 65
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 66
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 67
you have a Node.js based application and you plan to migrate it to Alibaba Cloud Function Compute, which of the following steps is unnecessary?
- A. Create a single web application and upload the corresponding code package via the Function Compute console (or fcli)
- B. Configure program startup commands and access ports in the Function Compute console
- C. Start and verify the application in the Function Compute console
- D. Manually install the Node. Js package in the Function Compute console
Answer: D
NEW QUESTION 68
Which of the following options is correct, regarding Object ACL in Alibaba Cloud's Object Storage Service (OSS)?
- A. "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.
- B. If the permissions of an object are not set, the permissions of the object are inherited from the bucket.
- C. 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.
- 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: C
NEW QUESTION 69
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 70
As more businesses move online and collect more data about their users, databases are beginning to grow very large, affecting table query performance and business operations. In order to solve these problems, in addition to sub-database sub-table transformation, we can also use Data Management Service (DMS)'s archiving function to regularly archive large table data. We can then remove the archived records from the original table to improve query performance. Which of these statements about this feature of DMS is NOT correct?
- A. Backup data can be stored In OSS
- B. The supported database types are RDS MySQL and PolarDB MySQL
- C. Before you can use this feature of DMS, you must first enable Alibaba Cloud's Database Backup Service (DBS)
- D. The user role of this operation must be 'administrator" or "DBA"
Answer: D
NEW QUESTION 71
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 72
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 73
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. 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
- D. As an agent for collecting logs, Logtail can collect logs from existing system log files in a non-intrusive manner
Answer: A,B,C
NEW QUESTION 74
When you use SQL statements to access tables in a database without an index configured, a full table scan will be performed. If a table contains a large amount of data, this kind of scan will access a large amount of data and consume a lot of the database's resources. Which of the following options are best practices when creating database indexes? (Number of correct answers: 3)
- A. Adhere to the rightmost prefix principle when using composite indexes.
- B. Apply indexing to fields of fixed length (preferably not long fields).
- C. Applies indices to fields that contain many records.
- D. table should not contain more than 6 indexed fields.
- E. Add an index to a field that is frequently queried but does not frequently perform add, delete, or modify operations.
Answer: B,C,E
NEW QUESTION 75
In order to have your applications interact with Alibaba Cloud RabbitMQ, you need to create related MQ resources first. Which of the following resources must be created? (Number of correct answers: 3)
- A. Broker
- B. Vhost
- C. Exchange
- D. Topic
- E. Queue
Answer: C,D,E
NEW QUESTION 76
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 77
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