Alibaba Cloud ACA-Developer Premium Exam Engine pdf - Download Free Updated 97 Questions
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NEW QUESTION 49
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. NoSuchObject
- B. NoSuchStyle
- C. NoSuchFile
- D. NoSuchBucket
- E. NoSuchKey
Answer: C,D,E
NEW QUESTION 50
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 51
In Alibaba Cloud RocketMQ, messages are kept for up to _____ days. We recommend configuring a monitoring service to watch the consumption status, and intervene manually when ''not consumed but to be deleted'' message alarms occur.
- A. 0
- B. 1
- C. 2
- D. 3
Answer: D
NEW QUESTION 52
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 53
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 Body
- B. HTTP Header
- C. Query
- D. Parameter Path
Answer: D
NEW QUESTION 54
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 55
Which of the following statements about PolarDB's endpoint(s) is NOT correct?
- A. Cluster endpoints support read/write splitting.
- B. Through a cluster endpoint, applications can connect to data nodes.
- C. The primary endpoint supports read/write splitting.
- D. The endpoint of the PolarDB MySQL database includes the cluster endpoint and the primary endpoint.
Answer: A
NEW QUESTION 56
Alibaba Cloud's ECS disk snapshotting tool can create crash-consistent snapshots for all types of Cloud Disks.
It is a convenient and efficient disaster recovery method. It is often used for data backup, custom mirroring, application disaster recovery, etc. Which of the following is NOT a correct description of disk snapshots?
- A. Snapshot rollbacks can be performed while the ECS instance is running.
- B. In the event of a system failure, you can use a snapshot to roll back the Cloud Disk to an earlier point in time.
- C. Snapshots can be created manually through the web console or command line tools, or automatically according to a schedule.
- D. A snapshot is a backup file of the cloud disk data state at a certain point in time. The first snapshot of the cloud disk is a full snapshot of the ac usage. Empty data blocks are not backed up. All subsequent snapshots are incremental snapshots, and only changed data blocks are stored.
Answer: D
NEW QUESTION 57
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. Jaeger
- B. Skywalklng
- C. Zipkln
- D. Pinpoint
Answer: A
Explanation:
Explanation
https://www.alibabacloud.com/blog/opentracing-implementation-of-jaeger_594957
NEW QUESTION 58
A certain project of Enterprise A (called Project-X) moves to the cloud and will need to use a variety of s Alibaba Cloud resources, such as ECS instances, RDS instances, SLB instances, and OSS storage space. There are multiple employees on the project who need to operate these cloud resources. Because each employee has different job responsibilities and requires different permissions, what is the WRONG approach to resource management?
- A. Use system policies to bind reasonable permissions policies to users or user groups, and customize policies for more fine-grained control
- B. Create RAM users each employee, and set login passwords or create AccessKey credentials as needed
- C. When there are multiple RAM users under a cloud account, create user groups to classify and authorize RAM users with the same responsibilities
- D. When creating RAM for users, give each user both web console AND AccessKey credentials: there is no need to keep these separate
Answer: B
NEW QUESTION 59
You have an application with the following requirements:
7. There will be a lot of video content that need to be uploaded.
2. Each uploaded video needs to be preprocessed to provide different video resolutions and quality levels to accommodate different devices and network conditions.
3. It should be possible to process video in parallel at scale, to ensure that videos are preprocessed in a reasonable amount of time.
Which of the following Alibaba Cloud applications can be combined to provide a low operation and maintenance burden and relatively low operating costs? (Number of correct answers: 3)
- A. Elastic Compute Service (ECS)
- B. Serverless Workflow
- C. Server Load Balancer (SLB)
- D. Log Service
- E. Function Compute
Answer: A,B,D
NEW QUESTION 60
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 61
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 62
In PolarDB, if an UPDATE SQL statement encounters an issue, you need to check the execution plan to figure out the root cause. However, in the production environment, to avoid affecting the production data, what statement should you use to view the execution plan? (Number of correct answers: 2)
- A. explain analyze SQL
- B. explain analyze verbose SQL
- C. explain SQL
- D. explain verbose SQL
Answer: A,D
NEW QUESTION 63
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 64
A developer is making the ModifyDDInstanceSpec API call to change the specifications of an RDS instance, but the operation fails. Why could this be? (Number of correct answers: 3)
- A. The instance is in the running state
- B. The targeted RDS instance is a disaster recovery instance
- C. The instance has a backup task being executed
- D. No instance type (specification) was included in the request parameters
Answer: A,C,D
NEW QUESTION 65
What are the advantages of using Elastic Container Instance (ECI) to deploy applications compared with using ECS? (Number of correct answers; 2)
- A. Startup in seconds without the need to reserve resources
- B. Stronger isolation between instances
- C. Low maintenance, low costs
- D. Less significant visualization layer performance losses
Answer: A,C
NEW QUESTION 66
You want to deploy a LAMP development environment in Alibaba Cloud's Singapore region, and you want to simultaneously bind a domain name and configure HTTPS. Which of these services can help you accomplish this quickly and easily?
- A. Elastic Compute Service (ECS)
- B. Simple Application Server (SAS)
- C. Alibaba Cloud Container Service for Kubernetes (ACK)
- D. Elastic Container Instance (ECI)
Answer: B
NEW QUESTION 67
For business scenarios with strong data reliability requirements or financial business scenarios with regulatory requirements related to data durability and availability, RDS MySQL provides a remote backup mechanism to improve reliability. Which of the following is correct, regarding RDS's remote disaster recovery capabilities?
(Number of correct answers: 3)
- A. When an outage occurs in the area where the primary instance is located, and neither the primary instance (Master) nor the standby instance (Slave) can be connected to, the remote disaster recovery instance can be switched to the primary instance
- B. RDS realizes real-time synchronization between the master instance and the remote disaster recovery instance through Data Transmission Service (DTS)
- C. The primary database (the one to be backed up) must have an Alibaba Cloud Intranet address
- D. When the database deletion operation is performed on the master instance, the operation will also be synchronized to the disaster recovery instance
Answer: D
NEW QUESTION 68
Which data format is NOT supported by Alibaba Cloud Message Service?
- A. JSON
- B. SIMPLIFIED
- C. XML
- D. VERBOSE
Answer: D
NEW QUESTION 69
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. Manually install the Node. Js package in the Function Compute console
- B. Start and verify the application in the Function Compute console
- C. Create a single web application and upload the corresponding code package via the Function Compute console (or fcli)
- D. Configure program startup commands and access ports in the Function Compute console
Answer: A
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. Before you can use this feature of DMS, you must first enable Alibaba Cloud's Database Backup Service (DBS)
- B. Backup data can be stored In OSS
- C. The user role of this operation must be 'administrator" or "DBA"
- D. The supported database types are RDS MySQL and PolarDB MySQL
Answer: C
NEW QUESTION 71
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