Alibaba ACP-Cloud1 Exam Practice Test Instant Access

Question 1

When distributing loads to multiple ECS instances with an Alibaba Cloud Server Load Balancer (SLB), you can obtain the real IP addresses of users who initiate the requests through _____________. (Choose two.)

AFor Layer-7 services, SLB obtains the real IP addresses of the visitors by means of HTTP Header: X-Forwarded-For, but the ''Obtain the Visitors Real IP Address'' function must be enabled first.

BFor Layer-4 services, you can obtain the visitors' real IP addresses directly, without any additional settings.

CFor Layer-4 services, SLB obtains the real IP addresses of the visitors by means of the HTTP Header: X-Forwarded-For, but the ''Obtain the Visitors Real IP Address'' function must be enabled first.

DFor Layer-7 services, you can obtain the visitors' real IP addresses directly, without any additional settings.

Answer : A, B

In Alibaba Cloud SLB, Layer-7 (HTTP/HTTPS) services require enabling the 'X-Forwarded-For' header to retrieve the real IP address of clients, while Layer-4 (TCP/UDP) services can obtain the real IP address directly without additional settings.

Question 2

Cloud computing adopts a common model in Distributed Systems. It distributes a computing task to a resource pool (comprised of a large number of computers). Elastic utilization of the resource pool allows applications to obtain computing capacity, storage space, and message services according to needs. Which of the following statements are correct about cloud computing? (Choose four.)

ALarge scale

BHigh availability

CService on demand

DVersatility

EContainer-based

FOnly supports single tenant

Answer : A, B, C, D

Cloud computing is characterized by large-scale infrastructure, high availability, on-demand service provisioning, and versatility in handling diverse applications and workloads. It supports both multi-tenant and single-tenant configurations, and although containerization is popular, cloud computing is not limited to container-based architectures.

Question 3

Alibaba Cloud OSS is a cloud storage service that features massive capacity, outstanding security, low costs, and high reliability. When talking about information security, the advantages of using OSS are ____________. (Choose two.)

ASupports Anti-DDoS, automatic traffic cleaning, and 'black holing' without any extra charges.

BOffers a multi-user isolation mechanism directly, with no need to leverage RAM.

COffers Server Side Encryption for data security protection in OSS.

DProvides Primary/Secondary region configuration for data reliability protection.

Answer : C, D

Alibaba Cloud OSS offers Server Side Encryption to protect data at rest, enhancing security. It also supports multi-region replication with Primary/Secondary region configurations for additional data reliability and disaster recovery. Anti-DDoS is not an inherent feature of OSS, and multi-user isolation is achieved via Alibaba Cloud's Resource Access Management (RAM).

Question 4

Which of the following Alibaba Cloud products can provide Anti-DDoS service? (Choose two.)

ASecurity Center

BAnti-DDoS Origin Service

CAnti-DDoS Pro Service

DCloud Firewall

Answer : B, C

Alibaba Cloud provides two main products for Anti-DDoS protection: Anti-DDoS Origin Service, which protects against attacks at the origin server level, and Anti-DDoS Pro Service, which offers advanced DDoS mitigation for applications hosted on Alibaba Cloud. Security Center and Cloud Firewall offer different security functionalities but do not provide direct Anti-DDoS services.

Question 5

Alibaba Cloud's Object Storage Service (OSS) can be used to store a large amount of data, but there is still a maximum number of files in a single bucket.

ATrue

BFalse

Answer : B

There is no limit on the number of objects that can be stored in a single OSS bucket in Alibaba Cloud. OSS is designed to support massive data storage, allowing users to store an unlimited number of files within a bucket. The only limitations are the bucket storage capacity and account-level quotas.

Question 6

When using Alibaba Cloud SLB, users can enable the Health Check function. Layer-4 SLBs (TCP protocol) determine the availability of ECS instances through _________________.

AWhether the 3-way handshake can be established between the backend ECS instance and the SLB.

BSpecial characters contained in the message returned from backend ECS instances.

CStatus codes returned from backend ECS instances.

DLength of the message returned from backend ECS instances.

Answer : A

For Layer-4 SLB using TCP, the health check determines ECS instance availability based on the successful completion of a TCP 3-way handshake. This ensures that the backend server is reachable and can accept connections, which is critical for reliable TCP-based load balancing.

Question 7

A company uses Alibaba Cloud SLB with a Layer-7 Listener and Auto Scaling to reduce O&M costs and maintain a stable, reliable system. However, lacking experience with Alibaba Cloud, the company's engineers have outlined precautions they think are necessary. As an Alibaba Cloud expert, you tell them that only ____________ is a valid concern.

ASLB instances must have Health Check enabled, or they cannot be used together with Auto Scaling.

BAll ECS instances under the same SLB instance must be running the same operating system.

CAll backend servers under the same SLB instance must be in the same Scaling Group.

DAll backend servers under the same SLB instance must have the same configuration.

Answer : A

For optimal use of SLB with Auto Scaling, enabling Health Check is essential to determine which instances are healthy and ready to handle traffic. SLB doesn't require all backend servers to have the same OS, be in the same scaling group, or have identical configurations, as it can manage heterogeneous server setups within the same load-balancing group.

Alibaba ACP-Cloud1 ACP Cloud Computing Certification Exam Practice Test