[Jan-2022] Updated Alibaba Cloud ACA-Developer Dumps – PDF & Online Engine
ACA-Developer.pdf - Questions Answers PDF Sample Questions Reliable
Alibaba Cloud ACA-Developer Exam Syllabus Topics:
| Topic | Details |
|---|---|
| Topic 1 |
|
| Topic 2 |
|
| Topic 3 |
|
| Topic 4 |
|
| Topic 5 |
|
| Topic 6 |
|
| Topic 7 |
|
| Topic 8 |
|
| Topic 9 |
|
| Topic 10 |
|
| Topic 11 |
|
| Topic 12 |
|
NEW QUESTION 51
A developer is making the ModifyDDInstanceSpec API call to change the specifications of an RDS instance, but the operation fails. Why could this be? (Number of correct answers: 3)
- A. The instance has a backup task being executed
- B. No instance type (specification) was included in the request parameters
- C. The targeted RDS instance is a disaster recovery instance
- D. The instance is in the running state
Answer: A,B,D
NEW QUESTION 52
A developer was sending a request to Key Management Service (KMS) through the KMSAPI interface, and found that the key management service cannot be accessed. What is a possible reason?
- A. The user key master key is in Pendinglmport state
- B. The user key master key is in PendingDeletion state
- C. The HTTPS protocol is not enabled
- D. User key master key is in Disabled state
Answer: B
NEW QUESTION 53
Which of the following is NOT required for SMC (Server Migration Center) to migrate a server to Alibaba Cloud?
- A. From the SMC console, configure the type of disk image to be generated during the migration.
- B. The SMC client transfers the source data to an intermediate ECS instance.
- C. Import the migration source information to the SMC console.
- D. The SMC backend service generates a target Alibaba Cloud image based on the migration source.
Answer: C
NEW QUESTION 54
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 user role of this operation must be 'administrator" or "DBA"
- B. Backup data can be stored In OSS
- C. Before you can use this feature of DMS, you must first enable Alibaba Cloud's Database Backup Service (DBS)
- D. The supported database types are RDS MySQL and PolarDB MySQL
Answer: A
NEW QUESTION 55
Assume that a company uses ApsaraDB for PolarDB. The company commonly queries users based on their basic information, including: addresses, company names, and ID numbers. In this scenario, what is the best practice for creating a database index (or indexes)?
- A. Create a gin index for multiple fields.
- B. Create a gist index for multiple fields.
- C. Create a hash index on each column to be searched.
- D. Create a b-tree index on each column to be searched.
Answer: D
NEW QUESTION 56
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 verbose SQL
- B. explain analyze verbose SQL
- C. explain analyze SQL
- D. explain SQL
Answer: A,C
NEW QUESTION 57
Function Compute supports one-way triggers and two-way triggers. Which of the following triggers is a one-way trigger? That is to say you only need to configure the trigger in the event source, not in Function Compute?.
- A. CloudMonitor trigger(s)
- B. SLS trigger(s)
- C. MNS topic trigger(s)
- D. OSS event trigger(s)
Answer: A
NEW QUESTION 58
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. 0
- B. 1
- C. 2
- D. 3
Answer: A
NEW QUESTION 59
Log Service uses a semi-structured data model to define a log. This mode contains five data fields:
Topic, Time, Content, Source, and Tags. Log Service has different requirements for the format of each field in the log. Which of the following fields cannot be empty characters? (Number of correct answers: 4)
- A. Topic
- B. Content
- C. Source
- D. Time
- E. Tags
Answer: A,C,D,E
NEW QUESTION 60
Which of the following options are correct for Multipart Upload and Resumable Upload in Object Storage Service (OSS)? (Number of correct answers: 3)
- A. Multipart Upload is usually used when the size of the file to be uploaded is large
- B. After an upload is interrupted, the portions of the file which have successfully uploaded prior to the interruption will be saved in the OSS bucket
- C. Use Multipart Upload to upload parts of a file in parallel to speed up the upload process
- D. If the upload fails due to an accident during the uploading of fragments, you need to upload all the fragments again
Answer: A,C,D
NEW QUESTION 61
For business scenarios with strong data reliability requirements or financial business scenarios with regulatory requirements related to data durability and availability, RDS MySQL provides a remote backup mechanism to improve reliability. Which of the following is correct, regarding RDS's remote disaster recovery capabilities?
(Number of correct answers: 3)
- A. When an outage occurs in the area where the primary instance is located, and neither the primary instance (Master) nor the standby instance (Slave) can be connected to, the remote disaster recovery instance can be switched to the primary instance
- B. RDS realizes real-time synchronization between the master instance and the remote disaster recovery instance through Data Transmission Service (DTS)
- C. When the database deletion operation is performed on the master instance, the operation will also be synchronized to the disaster recovery instance
- D. The primary database (the one to be backed up) must have an Alibaba Cloud Intranet address
Answer: C
NEW QUESTION 62
In Alibaba Cloud RocketMQ, messages are kept for up to _____ days. We recommend configuring a monitoring service to watch the consumption status, and intervene manually when ''not consumed but to be deleted'' message alarms occur.
- A. 0
- B. 1
- C. 2
- D. 3
Answer: A
NEW QUESTION 63
Which of these are good ways to secure access to your API deployed on Alibaba Cloud API Gateway?
(Number of correct answers: 3)
- A. Enable API Gateway to connect to backend services in an Alibaba Cloud VPC network group. This guarantees the security of API requests.
- B. Use OpenID Connect to authenticate requests.
- C. Allow only internal IP addresses to call the API.
- D. Configure security keys for API Gateway.
- E. Use HTTPS to encrypt requests.
Answer: A,C,E
NEW QUESTION 64
A certain project of Enterprise A (called Project-X) moves to the cloud and will need to use a variety of s Alibaba Cloud resources, such as ECS instances, RDS instances, SLB instances, and OSS storage space. There are multiple employees on the project who need to operate these cloud resources. Because each employee has different job responsibilities and requires different permissions, what is the WRONG approach to resource management?
- A. Use system policies to bind reasonable permissions policies to users or user groups, and customize policies for more fine-grained control
- B. Create RAM users each employee, and set login passwords or create AccessKey credentials as needed
- C. When creating RAM for users, give each user both web console AND AccessKey credentials: there is no need to keep these separate
- D. When there are multiple RAM users under a cloud account, create user groups to classify and authorize RAM users with the same responsibilities
Answer: B
NEW QUESTION 65
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.
Answer: B,C
NEW QUESTION 66
To meet data analytics requirements on large datasets, which of these databases can meet the demand for structured and semi-structured storage for almost all types of data, albeit with limited support for strong transactions?
- A. HBase
- B. RDSMariaDB
- C. TSDB
- D. OceanBase
Answer: B
NEW QUESTION 67
A development team currently supports an application that is designed to be deployed on a single server's local memory As part of migrating to Alibaba Cloud, the team needs to use Auto Scaling, and must therefore move their game state data off of their servers, so that they can automatically scale up and down without losing game data. Where should the team store these game results to best allow for consistent results without impacting performance?
- A. Log Service
- B. Redis
- C. OSS
- D. RDS
Answer: B
NEW QUESTION 68
Which of the following statements about migrating data into and out of Object Storage Service (OSS) are correct? (Number of correct answers: 3)
- A. A migration job occupies the network resources of the source and the destination. To ensure business continuity, we recommend that you specify a rate limit for a migration Job or run the migration job during an off-peak period.
- B. Online migration supports both migrating buckets at a time, and migrating all the data under an Alibaba Cloud account at a single time.
- C. You can migrate data between OSS buckets in any of the following conditions: Buckets are located within the same region, buckets are located across regions and buckets belong to different Alibaba Cloud accounts.
- D. You cannot migrate data between OSS buckets if the data at the source is stored in a bucket of the Archive type.
Answer: B,C,D
NEW QUESTION 69
Which of the following programming languages are supported by the Alibaba Cloud SDK? (Number of correct answers: 3)
- A. Bash shell
- B. PHP
- C. Swift
- D. Python
- E. Java
Answer: B,D,E
Explanation:
Explanation
https://www.alibabacloud.com/help/doc-detail/74712.htm
NEW QUESTION 70
Which of the following configurations cannot improve the stability, reliability or availability of an Alibaba Cloud Scaling Group? (Number of correct answers: 3)
- A. Choose a variety of different ECS types when creating your Scaling Configuration
- B. Select multiple VPCs when creating the scaling group
- C. When creating the scaling group, select multiple Vswitches in multiple Zone within a Region
- D. In the process of creating a Scaling Group, associate multiple Server Load Balancers
Answer: A,B,D
NEW QUESTION 71
On which operating systems can you install Alibaba Cloud command line tools? (Number of correct answers:
3)
- A. Android
- B. macOS
- C. Linux
- D. Windows
Answer: B,C,D
Explanation:
Explanation
https://www.alibabacloud.com/blog/how-to-manage-your-alibaba-cloud-linux-server-from-the-command-line-in
NEW QUESTION 72
......
Alibaba Cloud ACA-Developer Dumps PDF Are going to be The Best Score: https://www.validbraindumps.com/ACA-Developer-exam-prep.html