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Alibaba Cloud ACA-Developer Exam Syllabus Topics:
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NEW QUESTION 25
Alibaba Cloud Link Tracing Analysis supports call link reporting based on the Open Tracing standard. Which of the following client types does link tracing support? (Number of correct answers:3)
- A. Zipkln
- B. Pinpoint
- C. Skywalklng
- D. Jaeger
Answer: D
Explanation:
Explanation
https://www.alibabacloud.com/blog/opentracing-implementation-of-jaeger_594957
NEW QUESTION 26
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. Avoid using version management.
- B. 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. - C. Use OSS's built in lifecycle management capabilities to move old versions of objects to Archival Storage.
Answer: C
NEW QUESTION 27
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. The user role of this operation must be 'administrator" or "DBA"
- B. Backup data can be stored In OSS
- C. Before you can use this feature of DMS, you must first enable Alibaba Cloud's Database Backup Service (DBS)
- D. The supported database types are RDS MySQL and PolarDB MySQL
Answer: A
NEW QUESTION 28
By default, Function Compute creates an instance for each request Function compute allows you to create multiple instances concurrently to reduce costs and improve execution efficiency Which of the following scenarios is NOT suitable for enabling the feature of handling multiple requests on a single instance? (Number of correct answers: 2)
- A. Requests are waiting for responses from the downstream service for an extended period of time.
- B. The function has a shared state and cannot be accessed concurrently.
- C. Functions processes independent data objects.
- D. A request consumes a large amount of CPU and memory resources.
Answer: A,B
NEW QUESTION 29
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.key.secret
- B. regionjd
- C. access.keyjd
- D. zone jd
- E. vpcjd
Answer: A,B,C
Explanation:
Explanation
https://www.alibabacloud.com/help/doc-detail/53090.htm
NEW QUESTION 30
Which of the following descriptions of the principles of Alibaba Cloud SSL certificate private key protection is correct?
- A. Alibaba Cloud Certificate Service uses symmetric encryption to save the certificate private key
- B. The plaintext of Alibaba Cloud's private key is usually stored on disk and backed up regularly
- C. Alibaba Cloud Certificate Service keys are loaded Into memory in plaintext format ONLY when needed
- 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 31
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. Apply indexing to fields of fixed length (preferably not long fields).
- B. Add an index to a field that is frequently queried but does not frequently perform add, delete, or modify operations.
- C. table should not contain more than 6 indexed fields.
- D. Adhere to the rightmost prefix principle when using composite indexes.
- E. Applies indices to fields that contain many records.
Answer: A,B,E
NEW QUESTION 32
Which of the following statements about migrating data into and out of Object Storage Service (OSS) are correct? (Number of correct answers: 3)
- A. 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.
- B. Online migration supports both migrating buckets at a time, and migrating all the data under an Alibaba Cloud account at a single time.
- C. 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.
- D. You cannot migrate data between OSS buckets if the data at the source is stored in a bucket of the Archive type.
Answer: B,C,D
NEW QUESTION 33
Which of the following OSS tools are GUI-based? (Number of correct answers:2)
- A. Web Console
- B. ossbrowser
- C. ossf s
- D. ossutil
Answer: C,D
NEW QUESTION 34
Which of the following options are correct for Multipart Upload and Resumable Upload in Object Storage Service (OSS)? (Number of correct answers: 3)
- A. Multipart Upload is usually used when the size of the file to be uploaded is large
- B. After an upload is interrupted, the portions of the file which have successfully uploaded prior to the interruption will be saved in the OSS bucket
- C. Use Multipart Upload to upload parts of a file in parallel to speed up the upload process
- D. If the upload fails due to an accident during the uploading of fragments, you need to upload all the fragments again
Answer: A,C,D
NEW QUESTION 35
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. Form Upload
- D. Multipart Upload
Answer: A
NEW QUESTION 36
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 37
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. HBase
- B. RDSMariaDB
- C. TSDB
- D. OceanBase
Answer: B
NEW QUESTION 38
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 via HTTP
- C. Report event monitoring through the Python SDK
- D. Report event monitoring data through the command line (CU)
Answer: A,B,C
NEW QUESTION 39
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. Incremental data migration
- B. Full data migration
- C. One-way data synchronization
- D. Two-way data synchronization
Answer: B
NEW QUESTION 40
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. NoSuchKey
- B. NoSuchBucket
- C. NoSuchFile
- D. NoSuchObject
- E. NoSuchStyle
Answer: A,B,C
NEW QUESTION 41
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 42
Which of the following permission control policies does Object Storage Service (OSS) provide for access to objects stored in a bucket? (Number of correct answers: 4)
- A. Bucket Policy
- B. Object Policy
- C. ACL
- D. IntranetAccess
- E. STS authorization
- F. RAM Policy
- G. Dynamic blacklist
Answer: A,B,C,E
NEW QUESTION 43
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. Enterprise OA system
- C. E-Commerce sales & promotions
- D. Live video chat system
Answer: A,B,D
NEW QUESTION 44
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. Table Store
- C. Function Compute
- D. Object Storage Service (OSS)
Answer: C
NEW QUESTION 45
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