ACA-Developer by Alibaba Cloud Valid Free Exam Practice Test

Question 1

What are the required parameters for the Python SDK to create a client to access Alibaba Cloud's API?
(Number of correct answers: 3)

A. access.key.secret B. regionjd C. vpcjd D. access.keyjd E. zone jd

Correct Answer: A,B,D

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Question 2

You can create an event notification rule in Message Service and push notifications to the specified consumer in the form of messages, to receive events from specified Alibaba Cloud resources. Which of the following options are correct statements about the Message Service (MS) service? (Number of correct answers: 2)

A. The event notification message is retained within the valid time. When you fail to receive an event message, the event notification message is retried based on the specified retry policy. B. Message Service provides synchronous notifications to ensure the consistency between the message acknowledgment and event processing. C. The consumer type of the event notification message can be HTTP Server, Queue, or Topic. D. Event Notifications can cross regions.

Correct Answer: A,B

Question 3

As more businesses move online and collect more data about their users, databases are beginning to grow very large, affecting table query performance and business operations. In order to solve these problems, in addition to sub-database sub-table transformation, we can also use Data Management Service (DMS)'s archiving function to regularly archive large table data. We can then remove the archived records from the original table to improve query performance. Which of these statements about this feature of DMS is NOT correct?

A. The supported database types are RDS MySQL and PolarDB MySQL B. The user role of this operation must be 'administrator" or "DBA" C. Backup data can be stored In OSS D. Before you can use this feature of DMS, you must first enable Alibaba Cloud's Database Backup Service (DBS)

Correct Answer: B

Question 4

In PolarDB, if an UPDATE SQL statement encounters an issue, you need to check the execution plan to figure out the root cause. However, in the production environment, to avoid affecting the production data, what statement should you use to view the execution plan? (Number of correct answers: 2)

A. explain analyze SQL B. explain SQL C. explain verbose SQL D. explain analyze verbose SQL

Correct Answer: A,C

Question 5

A developer creates a MySQL database service on a Linux ECS instance (ECS-A), and wants to access this database service from another instance (ECS-B) in the same VPC using the private IP address bound to the ECS instance, however, the connection can't be established. What could cause this? (Number of correct answers: 2)

A. The security group for ECS-A does not have the default MySQL service port open. B. The built-in firewall on ECS-A has rules that prohibit external access to the MySQL service port. C. No Internet IP address is configured for ECS-A. D. The bind-address parameter set in the my.ini configuration file of the MySQL service is commented out.

Correct Answer: C,D

Question 6

Which of the following descriptions of Alibaba Cloud's SSL certificate service are correct? (Number of correct answers: 2)

A. EV certificates are suitable for large enterprises, financial institutions, etc. B. Alibaba Cloud SSL Certificate Service supports the purchase of three types of certificates: DV certificates, OV certificates, and EV certificates. C. OV certificates are suitable for personal websites. D. DV level certificates are suitable for government organizations, enterprises, educational institutions, etc.

Correct Answer: B,C

Question 7

Which of the following errors may occur when you access an image stored in Object Storage Service, and attach an image processing URL parameter to the URL ? (Number of correct answers: 3)

A. NoSuchStyle B. NoSuchFile C. NoSuchObject D. NoSuchBucket E. NoSuchKey

Correct Answer: B,D,E

Question 8

Which of the following operations can be performed through Log Service sAPI? (Number of correct answers:
3)

A. Deliver logs to OSS for storage and analysis B. Create a Logstore, write and read logs to the Logstore C. Access control for different users D. Collect logs based on Logtail configuration and Logtail machine group information

Correct Answer: B,C,D

Question 9

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?

A. Logslash B. Kafka C. Syslog D. Web Tracking

Correct Answer: C

Question 10

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. Cloud Disks come In several different varieties: ESSD (Enhanced Solid State) Cloud Disks. SSD (Solid State ) Cloud Disks, and high-efficiency Cloud Disks. C. Two types of Cloud Disks can be attached to an ECS: System Disks and Data Disks. System Disks host the ECS instances operating system. D. 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.

Correct Answer: A,B,D

Alibaba Cloud ACA Developer Certification - ACA-Developer Exam Practice Test