Alibaba ACA-Developer Exam Practice Test Instant Access

Question 1

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)

AJaeger

BZipkln

CSkywalklng

DPinpoint

Answer : A

https://www.alibabacloud.com/blog/opentracing-implementation-of-jaeger_594957

Question 2

Which of the following descriptions describes the (Security Token Service) STS service correctly? (Number of correct answers: 3)

AThrough 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

BA STS request consists of an access address, communication protocol, request method, request parameters and character encoding

CWhen 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

DThe STS service supports the use of both HTTP and HTTPS protocols

Answer : B, C, D

Question 3

When connecting to the Alibaba Cloud RDS database, in order to improve the completeness and integrity of the connection, you can enable SSL encryption and install an SSL CA certificate for the required application service. Which of the following statements are correct? (Number of correct answers: 3)

ADue to the way in which SSL encryption is implemented, enabling SSL encryption will significantly increase the CPU usage rate. Enable SSL encryption when there is an encryption requirement for the external network link. The intranet link is relatively safe, and generally no link encryption is required.

BIf the RDS instance is a multi-node instance, the system will trigger the active/standby switch after the SSL service is disabled.

CWhen using read/write splitting, you can also enable SSL encryption to improve the security of the connection.

DIt is discovered that an Alibaba Cloud RDS SSL certificate is about to expire, and the validity period needs to be updated, requiring that the certificate be updated, then reinstalled. This will restart the RDS instance.

Answer : A, B, C

Question 4

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)

AThe function has a shared state and cannot be accessed concurrently.

BRequests are waiting for responses from the downstream service for an extended period of time.

CA request consumes a large amount of CPU and memory resources.

DFunctions processes independent data objects.

Answer : A, B

Question 5

Which of these are suitable use cases for Alibaba Cloud's MongoDB service? (Number of correct answers: 3)

AApplications requiring high OPS, such as logging apps

BScenarios where complex transaction support is required

CApplications where JSON is a good choice of storage format

DApplications requiring geo-location queries, such as logistics or order status apps

Answer : A, B, D

Question 6

When using the Alibaba Cloud CLI, what is the default data format for responses, when executing queries such as "aliyun ecs Describelnstances"?

AJSON

BYAML

CXML

DTABLE

Answer : A

Question 7

A company has some new content that needs to be promoted (such as new features, new activities, new games, or new articles). In order to achieve the overall promotion goal, the operating staff will select various channels for promotion (including standard HTML/HTML5 (desktop), iOS, and Android). You are using Alibaba Cloud's Log Service: in order to ascertain the effectiveness of content promotion accurately and in real time, which log collection method should you use, as a developer?

ASyslog

BWeb Tracking

CKafka

DLogslash

Answer : A

Alibaba ACA-Developer ACA Developer Exam Practice Test