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Best Quality Alibaba Cloud ACA-Operator Exam Questions
NEW QUESTION 32
A Developer is creating a Function Compute function. This function requires around 1 GB of temporary storage for files while executing. These files will not be needed after the function is completed for a fixed period. How can this developer MOST efficiently handle the temporary files?
- A. Store the files in the /tmp directory on a temporary ECS instance, and delete the files at when the Function Compute function call completes.
- B. Store the files in Cloud Disk and delete the files when Function Compute function call completes.
- C. Copy the files to an OSS bucket with a lifecycle policy configured to delete the files automatically.
- D. Copy the files to NFS and delete the files when the Function Compute function call completes.
Answer: C
NEW QUESTION 33
Which of these services can be used to monitor Alibaba Cloud resources and send alerts? (Number of correct answers: 3)
- A. Cloud Config
- B. CloudMonitor
- C. Object Storage Service (OSS)
- D. ActionTrail
Answer: A,B,D
Explanation:
Explanation
OSS is an object storage service.
NEW QUESTION 34
Which of the following descriptions of the principles of Alibaba Cloud SSL certificate private key protection is correct?
- A. The plaintext of Alibaba Cloud's private key is usually stored on disk and backed up regularly
- B. Alibaba Cloud Certificate Service keys are loaded into memory in plaintext format ONLY when needed.
- C. Alibaba Cloud uses the built-in functionality of the SSL certificate service to encrypt and store the private key to ensure the security of your certificate's private key
- D. Alibaba Cloud Certificate Service uses symmetric encryption to save the certificate private key.
Answer: B
NEW QUESTION 35
Resource Management provides a collection of resource management services that support enterprise IT administration.
- A. True
- B. False
Answer: A
Explanation:
Explanation
https://www.alibabacloud.com/help/doc-detail/94475.htm
NEW QUESTION 36
Your company decided to replicate the whole cloud environment in another region and use it as a cross-region failover in disaster recovery scenarios.
Your current environment includes Elastic Compute Service (ECS) instances, Server Load Balancer (SLB) instances and Relational Database Service (RDS) instances. Which of the following statements is correct?
- A. You can provision multiple SLB instances in multiple regions, thereby leveraging automatic high availability across regions
- B. You can provision multiple ECS instances in multiple regions, thereby leveraging automatic high availability across regions
- C. You can use DNS to resolve domain names to the IP addresses of multiple SLB instances running in different regions
- D. You can use DNS to resolve domain names to the IP addresses of multiple ECS instances running in different regions
Answer: C
Explanation:
Explanation
https://cloudacademy.com/course/alibaba-server-load-balancer-1066/alibabas-high-availability/
NEW QUESTION 37
Which database utility is suitable for database migration?
- A. DMS
- B. DBS
- C. DTS
- D. DAS
Answer: C
Explanation:
Explanation
https://www.alibabacloud.com/help/doc-detail/176063.htm
NEW QUESTION 38
A system operator can tag resources for costing and billing purposes.
- A. True
- B. False
Answer: A
Explanation:
Explanation
https://www.alibabacloud.com/help/doc-detail/25477.htm
NEW QUESTION 39
In order to deal with sudden spikes in traffic, Company A uses Alibaba Cloud Auto Scaling to set up an alarm trigger task (growing the Scaling Group when the average memory utilization on ECS instances exceeds 80%). During the test, it was found that the alarm task was not executed successfully. Which of these could be possible causes? (Number of correct answers: 3)
- A. Before triggering the alarm task, the number of instances in the group has reached the maximum number of instances allowed (MaxSize)
- B. The number of instances in the current group exceeds the "expected number of instances" for the Scaling Group
- C. The ECS instances in the Scaling Group have not yet installed the CloudMonitor monitoring agent
- D. The instance types chosen in the Scaling Configuration are out-of-stock in the Alibaba Cloud Region where the Scaling Group is located
Answer: A,C,D
Explanation:
Explanation
https://www.alibabacloud.com/help/doc-detail/74853.htm
NEW QUESTION 40
After you enable health checks of Server Load Balancer (SLB), when one backend ECS instance is declared as unhealthy, which of the following statements is correct?
- A. Requests are forwarded to other normal ECS instances and the unhealthy ECS instance is shutted down
- B. Requests are not forwarded to the ECS instances and you get back a 500 error
- C. Requests are forwarded to other normal ECS instances. When the faulty ECS instance becomes normal, SLB forwards requests to the ECS instance again
- D. Requests are not forwarded to the ECS instances and you get back a 400 error
Answer: C
Explanation:
Explanation
https://www.alibabacloud.com/help/doc-detail/27702.htm
NEW QUESTION 41
A developer is making the ModifyDBInstanceSpec 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 has a backup task being executed
- B. The instance is in the "running" state
- C. The targeted RDS instance is a disaster recovery instance
- D. No instance type (specification) was included in the request parameters
Answer: A,C,D
NEW QUESTION 42
Which of the following services is used to establish private network connections between virtual private clouds (VPCs) in different regions, or between VPCs and data centers?
- A. VPN Gateway
- B. CEN (Cloud Enterprise Network)
- C. Express Connect
- D. NAT Gateway
Answer: B
Explanation:
Explanation
https://www.alibabacloud.com/help/doc-detail/59870.htm
NEW QUESTION 43
Which of the following descriptions describes the (Security Token Service) STS service correctly? (Number of correct answers: 3)
- A. Through the STS service, RAM users or RAM roles can obtain a temporary token that allows them to call the Alibaba Cloud API or use the web console
- B. The STS service supports the use of both HTTP and HTTPS protocols
- C. When calling the STS API, in order to ensure the safe calling of the API, Alibaba Cloud will authenticate each API request through a signature when each API call is made
- D. A STS request consists of an access address, communication protocol, request method, request parameters and character encoding
Answer: A,C,D
NEW QUESTION 44
ApsaraDB for HBase is a cost-effective cloud-based intelligent SQL service that is of high scalability and compatible with the open source HBase.
- A. False
- B. True
Answer: A
Explanation:
Explanation
https://www.alibabacloud.com/help/doc-detail/49501.htm
NEW QUESTION 45
Which of the following engines is NOT supported by PolarDB?
- A. Oracle
- B. MongoDB
- C. PostgreSQL
- D. MySQLo
Answer: B
Explanation:
Explanation
https://www.alibabacloud.com/help/doc-detail/58764.htm
NEW QUESTION 46
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 visitor's real IP address. Which of the following statements about obtaining the visitor's real IP address are correct? (Number of correct answers: 2)
- 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.
- B. In Windows, if IIS is used, after installing the "F5XForwardedFor" extension module, the visitor's real IP address can be seen via IIS logs.
- C. 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.
- D. visitor's real IP address can only be obtained by modifying the site or web application.
Answer: A,B
NEW QUESTION 47
Which of these metrics are collected by CloudMonitor's Host Monitoring function? (Number of correct answers: 3)
- A. ECS network I/O
- B. Running processes on the ECS instance
- C. Storage space used by OSS buckets
- D. CPU status of the ECS instance
Answer: A,B,D
Explanation:
Explanation
https://www.alibabacloud.com/help/doc-detail/35170.htm
NEW QUESTION 48
Which of the following steps is NOT mandatory when creating an API through Alibaba Cloud API Gateway?
- A. Attach a domain name
- B. Define API Request parameters
- C. Define basic API information
- D. Define the API backend service
Answer: A
Explanation:
Explanation
https://www.alibabacloud.com/help/doc-detail/29478.htm
NEW QUESTION 49
Which of these is NOT a function of CloudMonitor?
- A. Automatically take remedial action when an alarm triggers
- B. Set alarm rules for any of CloudMonitor's metrics
- C. Set notification methods for different alarms
- D. Set the alarm rule effective period (the time during which the alarm may trigger)
Answer: A
Explanation:
Explanation
https://www.alibabacloud.com/help/doc-detail/35170.htm
NEW QUESTION 50
Which database utility is suitable for managing databases in a centralized manner?
- A. DTS
- B. DBS
- C. DMS
- D. DAS
Answer: C
Explanation:
Explanation
https://www.alibabacloud.com/help/doc-detail/47550.htm
NEW QUESTION 51
Alibaba Cloud RocketMQ is typically used in scenarios where message publishing and consumption performance requirements are high. Which of the following are supported message types in Alibaba Cloud RocketMQ? (Number of correct answers: 3)
- A. Batched message
- B. Scheduled message
- C. Retried message
- D. Ordered message
- E. Transactional message
Answer: B,D,E
NEW QUESTION 52
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