Alibaba Cloud ACA Developer Certification - ACA-Developer FREE EXAM DUMPS QUESTIONS & ANSWERS]

Question 1

A mobile application developer intends to use Alibaba Cloud Object Storage Service (OSS) to store the end user data for their app, and to ensure data isolation between each user of the app, to prevent one user from obtaining another's data. Which method can be done to meet these requirements?

A. STS authorization B. RAM Policy C. Bucket Policy D. Object Policy

Discussion 0

Correct Answer: A Vote an answer

Question 2

Which of the following statements describes AKs (Access Keys) incorrectly?

A. AK can refer to both the AccessKey ID and the AccessKey secret B. AccessKey Secrets for RAM sub-accounts can be queried at any time on the Console Interface after creation C. You can use AK to construct an API request and the corresponding resources can be manipulated if your request successfully.. D. An AccessKey ID and AccessKey Secret cannot be used separately

Discussion 0

Correct Answer: A Vote an answer

Question 3

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. Create a single web application and upload the corresponding code package via the Function Compute console (or fcli) B. Configure program startup commands and access ports in the Function Compute console C. Start and verify the application in the Function Compute console D. Manually install the Node. Js package in the Function Compute console

Discussion 0

Correct Answer: D Vote an answer

Question 4

Which of the following descriptions of Alibaba Cloud ECS storage are correct? (Number of correct answers:
3)

A. Alibaba Cloud provides a wealth of block storage products for ECS, including Cloud Disks (virtualized storage) and Local Disks (physically attached to the server(s) that host your ECS Instances). B. Both Local Disks and Cloud Disks use a multi-copy distributed storage mechanism, which has low latency, high performance, durability, and high reliability, and supports creation, expansion and release at any time. C. Cloud Disks come In several different varieties: ESSD (Enhanced Solid State) Cloud Disks. SSD (Solid State ) Cloud Disks, and high-efficiency Cloud Disks. D. Two types of Cloud Disks can be attached to an ECS: System Disks and Data Disks. System Disks host the ECS instances operating system.

Discussion 0

Correct Answer: A,B,C Vote an answer

Question 5

What are the advantages of using Elastic Container Instance (ECI) to deploy applications compared with using ECS? (Number of correct answers; 2)

A. Less significant visualization layer performance losses B. Stronger isolation between instances C. Startup in seconds without the need to reserve resources D. Low maintenance, low costs

Discussion 0

Correct Answer: C,D Vote an answer

Question 6

Alibaba Cloud RabbitMQ 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 Rabbit MQ? (Number of correct answers: 3)

A. Scheduled message B. Batched message C. Retried message D. Transactional message E. Ordered message

Discussion 0

Correct Answer: A,B,D Vote an answer

Question 7

A developer have written a web application using a microservice architecture, in such a architecture, the client (web browser or mobile application) first initiates a request. The request first reaches the load balancer, then goes through an authentication service, a billing service, then requests a resource, and finally a result is returned. How many spans does such a call chain consist of?

A. 6 B. 3 C. 5 D. 4

Discussion 0

Correct Answer: B Vote an answer

Question 8

Alibaba Cloud Content Delivery Network (CDN) is a suitable product for the following scenarios: (Number of correct answers: 2)

A. News websites with more than 30 million daily page views and users are all from Singapore. B. Images, HTML, CSS and JS files on a medium-sized E-commerce website. C. BBS forums with less than 100 daily page views. D. Static sites with more than 100,000 daily page views.

Discussion 0

Correct Answer: A,C Vote an answer

Question 9

What are the benefits of creating indexes on PolarDB? (Number of correct answers: 2)

A. Improve the efficiency of DDL operations. B. Reduce invalid data scanning. C. Improve the query efficiency SELECT statements. D. Improve the efficiency of DML operations such as UPDATE.

Discussion 0

Correct Answer: B,C Vote an answer

Question 10

Which of these are good ways to secure access to your API deployed on Alibaba Cloud API Gateway?
(Number of correct answers: 3)

A. Use HTTPS to encrypt requests. B. Allow only internal IP addresses to call the API. C. Enable API Gateway to connect to backend services in an Alibaba Cloud VPC network group. This guarantees the security of API requests. D. Use OpenID Connect to authenticate requests. E. Configure security keys for API Gateway.

Discussion 0

Correct Answer: A,B,C Vote an answer