Alibaba ACP-Cloud1 Exam Practice Test Instant Access

Question 1

A user builds an ECS + SLB + RDS architecture on Alibaba Cloud, with Auto Scaling to dynamically manage ECS instances. For business needs, they use ApsaraDB for Redis as a cache for hot data, requiring ECS instances to be added or removed from the Redis whitelist as they scale. As an Alibaba Cloud architect, which three Auto Scaling and OOS features would you recommend to automate adding and removing instances from the Redis whitelist? (Choose three.)

AAuto-Scaling lifecycle hooks

BOOS Template

CMNS

DInstance launch template

Answer : A, B, C

Using lifecycle hooks in Auto Scaling allows for custom operations, such as updating the Redis whitelist when instances are added or removed. An OOS (Operation Orchestration Service) template can automate this process, and MNS (Message Notification Service) can trigger events to inform Redis when changes occur.

Question 2

In Auto Scaling, the cool-down time of a scaling group refers to the lockout period after a scaling activity has been executed successfully. Which of the following statements about cool-down time are true? (Choose two.)

ADuring the cool-down time, only the scaling activities in the same scaling group are locked.

BYou can't skip a scaling group's cool-down time period right after a scaling activity is just finished.

CWhen multiple ECS instances are added or removed from a scaling group, the cool-down time begins only when the last instance has been added or removed from the scaling group.

DDuring the cool-down time of a scaling group, only the alarms from CloudMonitor can bypass the cool-down time and trigger scaling activities, whereas other scaling activities, such as manually triggered ones, will still be subject to the cool-down time.

Answer : A, C

During cool-down time, scaling activities in the same scaling group are temporarily locked to avoid unnecessary scaling activities. The cool-down time begins once all ECS instances in a multi-instance scaling action are added or removed.

Question 3

Alibaba Cloud Content Delivery Network (CDN) is a distributed network built on top of a base network with edge node server clusters distributed across various regions. If a user finds that the CDN cache hit rate is low, the possible reasons are ____________. (Choose three.)

AWhen websites have low access traffic and the files are not popular enough, the CDN will receive fewer requests and result in a lower cache hit rate.

BIf the cache configuration is inappropriate (e.g., overly short Cache Expiry Time for popular files), this may result in frequent back-to-source operations.

CInsufficient bandwidth was selected when enabling the CDN service, making the service capacity reach its limit.

DIf the origin site has a large number of dynamic resources or mostly non-cacheable content, this can also lead to frequent back-to-source operations.

EThe HTTP Header setting may cause the cache to fail. In this case, users must check the origin site's ''Cache-Control'' and ''Expires'' settings.

Answer : A, B, D

A low CDN cache hit rate can be due to low website traffic, poor cache configurations (such as a short Cache Expiry Time), or the presence of dynamic resources that require frequent retrieval from the origin. Proper configuration of 'Cache-Control' and 'Expires' headers is necessary to ensure caching.

Question 4

Availability Zones refer to data centers in the same region with independent power grids and networks. Which of the following statements are true for Zones? (Choose three.)

AIf the disaster recovery requirements of your applications are demanding, it is recommended that you deploy ECS instances in the same Region and Zone.

BThe network latency between inter-Zone ECS instances is lower.

CIntranet communication is available between different Zones in the same region, and data center-level fault isolation can be achieved between Zones.

DWhether you place ECS instances in the same Zone depends on the requirements for disaster recovery and network latency.

EIf your applications require low network latency between ECS instances, it is recommended that you create ECS instances in different Zones.

Answer : B, C, D

Zones in the same region support low-latency intranet communication, ideal for high-availability deployments with inter-Zone fault isolation. Placement of ECS instances in the same or different Zones depends on the disaster recovery and latency needs of the application.

Question 5

Alibaba Cloud CloudMonitor allows you to customize monitoring metrics and alert policies. Which of the following statements about customized monitoring are correct? (Choose two.)

AUsers can monitor concerned services and report collected monitoring data to CloudMonitor so that CloudMonitor processes the data and generates alerts according to the result.

BUsers can only select limited and fixed templates, and monitor specified server performance indicators.

CThe number of customized monitoring metrics is limited, and programs used to report metric data must be deployed on the Alibaba Cloud server.

DThe number of customized monitoring metrics is not limited, and programs used to report metric data may be deployed on devices other than the Alibaba Cloud server.

Answer : A, D

CloudMonitor allows users to create custom monitoring metrics and report data, which can then be analyzed and used for alerts. Customized monitoring is flexible, with no set limits on the number of metrics, and users can report data from Alibaba Cloud servers or other devices.

Question 6

User A is the system administrator of a company who frequently travels to Shanghai. Each time he remotely logs on to the server in Shanghai, an alert is reported, prompting, ''Someone is remotely logging on to the server. Please pay attention to your server security.'' Which of the following methods can be used to quickly and automatically resolve this problem?

AOpen a ticket immediately to consult Alibaba Cloud engineers.

BAsk the company leaders for help.

CLog on to Alibaba Cloud console, and add a frequent logon location to the Security Center configuration item.

DCall a friend for help, who is a famous hacker in the industry.

Answer : C

To prevent frequent alerts when User A logs in from Shanghai, the best solution is to configure the Security Center to recognize Shanghai as a frequent login location. This will prevent unnecessary security alerts each time User A accesses the server from this location.

Question 7

Alibaba Cloud ECS is a simple and efficient computing service. ECS helps you quickly deploy applications, improve your O&M efficiency, and reduce IT costs. ECS belongs to this type of service _____________.

ASaaS (Software as a Service)

BPaaS (Platform as a Service)

CIaaS (Infrastructure as a Service)

DDaaS (Data as a Service)

Answer : C

Alibaba Cloud ECS (Elastic Compute Service) is an Infrastructure as a Service (IaaS) offering, providing users with virtualized computing resources like virtual machines. IaaS services offer fundamental cloud infrastructure such as compute, storage, and networking resources.

Alibaba ACP-Cloud1 ACP Cloud Computing Certification Exam Practice Test