Online Questions - Valid Practice To your ACA-Developer Exam (Updated 97 Questions)
Practice To ACA-Developer - Remarkable Practice On your ACA Developer Certification Exam
NEW QUESTION 30
Which
of the following parameter locations should be specified for the parameter of key1 where the request URL is in the form: http://somesite.com/test?key1 =[value1] ?
- A. Parameter Path
- B. HTTP Body
- C. HTTP Header
- D. Query
Answer: A
NEW QUESTION 31
Which of the following data volume types is not supported by Elastic Container Instance (ECI)?
- A. ConfigFile
- B. EmptyDir
- C. FixedVolume
- D. NFS
Answer: B
NEW QUESTION 32
Which data format is NOT supported by Alibaba Cloud Message Service?
- A. JSON
- B. VERBOSE
- C. XML
- D. SIMPLIFIED
Answer: B
NEW QUESTION 33
You have an application with the following requirements:
7. There will be a lot of video content that need to be uploaded.
2. Each uploaded video needs to be preprocessed to provide different video resolutions and quality levels to accommodate different devices and network conditions.
3. It should be possible to process video in parallel at scale, to ensure that videos are preprocessed in a reasonable amount of time.
Which of the following Alibaba Cloud applications can be combined to provide a low operation and maintenance burden and relatively low operating costs? (Number of correct answers: 3)
- A. Function Compute
- B. Elastic Compute Service (ECS)
- C. Server Load Balancer (SLB)
- D. Log Service
- E. Serverless Workflow
Answer: B,D,E
NEW QUESTION 34
During the process of backing up an RDS database, a developer found that the backup failed. What might cause this to happen?
- A. DCL operations were performed during the backup
- B. DDL operations were performed during the backup
- C. The database instance is not stopped
- D. DML operations were performed during the backup
Answer: D
NEW QUESTION 35
Which of the following are types of backend services that API Gateway supports? (Number of correct answers: 3)
- A. Function Compute
- B. Log service
- C. HTTP(s) service
- D. Resources In a VPC
- E. CloudMonitor Service
Answer: C,D,E
NEW QUESTION 36
When using the Alibaba Cloud CLI, what is the default data format for responses, when executing queries such as "aliyun ecs Describelnstances"?
- A. YAML
- B. JSON
- C. TABLE
- D. XML
Answer: B
NEW QUESTION 37
When using Alibaba Cloud CDN, a visitor's request will first be routed to a CDN edge node, and in the event of a cache miss at this edge node, the node will fetch data from the origin site (back-to-source request). Even with this redirection, it is possible for the origin site to see the visitors real IP address. Which of the following statements about obtaining the visitor's real IP address are correct? (Number of correct answers: 2)
- A. A visitor's real IP address is stored in the "X-Forwarded-For" HTTP header It can be directly obtained via Apache or NGINX logs.
- B. A visitor's real IP address can only be obtained by modifying the site or web application.
- C. You can activate the "record visitor's real IP" function in the Alibaba Cloud CDN console, then you can directly view visitor's IP addresses from the Alibaba Cloud CDN access logs.
- D. In Windows, if IIS is used, after installing the "F5XForwardedFor" extension module, the visitor's real IP address can be seen via IIS logs.
Answer: B,D
NEW QUESTION 38
Which of the following options is not included in Object Storage Service (OSS) object URLs?
- A. Bucket name
- B. Region name
- C. Filename
- D. Zone name
Answer: B
NEW QUESTION 39
If a user finds that the Content Delivery Network (CDN) cache hit rate is low, what could be the reason?
(Number of correct answers: 3)
- A. When the website has low traffic, the CDN will receive fewer requests and this will result in a lower cache hit rate.
- B. Insufficient bandwidth was selected when enabling the CDN service, causing the service capacity reach its limit too early.
- C. HTTP Header settings may cause cache misses.
- D. Cache configuration is inappropriate (ex. overly short Cache Expiry Time for popular files).
- E. The origin site has a large number of dynamic resources.
Answer: A,B,D
NEW QUESTION 40
A developer runs a web application on a physical machine in an IDC. The machine is running Ubuntu Linux.
Which of the following is the recommended method if he wants to migrate this web application onto an Alibaba Cloud ECS instance?
- A. Use SMC(Server Migration Center) to collect data from the origin physical server. Create an intermediate ECS instance on Alibaba Cloud and wait for the data transfer to complete. Then generate a new image directly from that intermediate ECS instance.
- B. Use a third-party image creation tool to create an image from the physical server. Upload the image to the ECS console to turn it into a custom image. Then, use the custom image to create ECS instances.
- C. Use a third-party image creation tool to create an image from the physical server. The image is then uploaded to Alibaba Cloud Object Storage Service (OSS) for storage. In the ECS console, import that image from OSS, then, create an ECS instance from the custom image.
Answer: B
NEW QUESTION 41
You have a Java application with source code stored on GitHub. Now you want to build a container image using this code, and store it on a Container Registry instance located in Mainland China. Which of the following is the simplest, lowest maintenance option?
- A. Upload the Dockerfile to GitHub for version control, then download it together with the Java code to your local device, compile and pack container image, and upload the image to Alibaba Cloud Container Registry via docker push .
- B. Associate your Alibaba Cloud Container Registry instance with your GitHub repository, and upload the Java code and Dockerfile to GitHub Th Container Registry's built-in build service, configuring a rule that will rebuild your container image whenever your GitHub code is updated
- C. Associate your Alibaba Cloud Container Registry instance with your GitHub repository, and upload the Java code and Dockerfile to GitHub Set u Jenkins environment to automate the process of building the container image and pushing it to your Container Registry instance.
- D. Download the Java code from GitHub to your laptop, build the Docker image using a local Dockerfile, and use docker push to upload It to Container Registry.
Answer: B
NEW QUESTION 42
Company A has a large number of files store in Alibaba Cloud OSS that need to be deleted (numbering in the tens of thousands). What is the fastest, easiest way to delete these files?
- A. Configure a life cycle rule that matches the entire bucket, and delete all files after one day
- B. Directly delete the bucket
- C. Call the API from a script, deleting files in batches
- D. Manually delete them one by one
Answer: D
NEW QUESTION 43
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 gist index for multiple fields.
- B. Create a hash index on each column to be searched.
- C. Create a b-tree index on each column to be searched.
- D. Create a gin index for multiple fields.
Answer: C
NEW QUESTION 44
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. NoSuchObject
- B. NoSuchBucket
- C. NoSuchFile
- D. NoSuchStyle
- E. NoSuchKey
Answer: B,C,E
NEW QUESTION 45
Which of the following statements describe the trace/D and spanID in a service tracking system (such as Zipkin) correctly? (Number of correct answers: 3)
- A. Traceld is used to distinguish the sequence of calls between different services of the system, spanld is used to concatenate all the paths that a certain request traverses in the system.
- B. Spanld can locate the position of a request in the system call, and who its upstream and downstream dependencies are respectively.
- C. When the user's request enters the system, a globally unique traceld will be generated on the first layer of the calling network.
- D. The tracelD will be called with each layer and passed back continuously, so through traceld, the path of a user request in the system can be connected in series.
Answer: A,B,C
NEW QUESTION 46
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. Retried message
- B. Scheduled message
- C. Transactional message
- D. Ordered message
- E. Batched message
Answer: B,C,E
NEW QUESTION 47
On which operating systems can you install Alibaba Cloud command line tools? (Number of correct answers:
3)
- A. macOS
- B. Android
- C. Linux
- D. Windows
Answer: A,C,D
Explanation:
Explanation
https://www.alibabacloud.com/blog/how-to-manage-your-alibaba-cloud-linux-server-from-the-command-line-in
NEW QUESTION 48
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 targeted RDS instance is a disaster recovery instance
- B. No instance type (specification) was included in the request parameters
- C. The instance is in the running state
- D. The instance has a backup task being executed
Answer: B,C,D
NEW QUESTION 49
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