Best Quality Alibaba Cloud ACA-Cloud1 Exam Questions DumpsValid Realistic Practice Exams [2021]
Critical Information To ACA Cloud Computing Associate Pass the First Time
NEW QUESTION 40
A video streaming company uses SLB to distribute user requests to 30 ECS instances (the 30 ECS instances have the same configuration). Yet, the company finds that the service traffic soars dramatically every night from 20:00 to 02:00. According to their calculation, the evening traffic is 100% higher than the traffic in other periods of time. To properly respond to user requests, which of the following methods is most preferred from the perspective of cost and implementation simplicity?
- A. Create 30 ECS instances based on the custom image and add them to SL Then, configure weights for these ECS instances to respond to user requests every night from 20:00 to 02:00, and reset those weights to zero for other periods of time.
- B. Configure Auto Scaling appropriately to automatically upgrade/downgrade the ECS instances.
- C. Configure Auto Scaling appropriately to automatically add or reduce ECS instances.
- D. Manually create 30 ECS instances using the custom image, and then add them to SLB every night before 20:00 and remove them after 02:00.
Answer: C
NEW QUESTION 41
Which of the following statements to OSS bucket is not correct?
- A. Every bucket should have a unique name
- B. There is no limitation to objects number inside one bucket
- C. Every user can create more than one bucket
- D. Bucket name can be changed after creation
Answer: D
Explanation:
Explanation/Reference: https://www.alibabacloud.com/help/doc-detail/31885.htm?spm=a2c63.p38356.a3.3.43f03bb9a3KjLl
NEW QUESTION 42
Which of the following is not the database type supported by RDS?
- A. SQL Server
- B. Oracle database
- C. Postgre SQL
- D. MySQL
Answer: B
Explanation:
Explanation/Reference: https://aws.amazon.com/rds/features/
NEW QUESTION 43
ECS is a highly flexible service. It can be used independently as a simple web server, or used with other Alibaba Cloud products, such as OSS and CDN, to provide advanced solutions. ECS can be used in applications such as: . (Choose four.)
- A. simple web applications
- B. Databases
- C. no limited online storage
- D. Official corporate websites
- E. large-traffic apps
Answer: A,B,D,E
NEW QUESTION 44
feature in Server Load Balancer means that it can forward the access requests from a single user to the same ECS instance within a certain period to ensure session continuity.
- A. least connections scheduling
- B. health check
- C. Weighted Round Robin
- D. session persistence
Answer: D
Explanation:
Reference:
https://www.alibabacloud.com/help/doc-detail/55202.htm
NEW QUESTION 45
Which of the followings are not the operations that you can do on a cloud disk snapshot? (Choose two.)
- A. snapshot rollback
- B. snapshot download
- C. snapshot deletion
- D. snapshot duplicate
Answer: B,D
NEW QUESTION 46
Which of the following statements is true for RDS?
- A. Multiple databases can be created in one RDS instance.
- B. Databases with the same name are allowed in the same instance.
- C. None of the above is true.
- D. Resources are not shared among the databases in the same RDS instance.
Answer: A
NEW QUESTION 47
Which of the following scenarios is applicable to use RDS read-only instances?
- A. Improves RDS storage capabilities.
- B. Reduces the write pressure on the RDS primary instance.
- C. Implements data backtracking for the last two days.
- D. Reduces the read pressure on the RDS primary instance.
Answer: D
NEW QUESTION 48
A company wants to use Alibaba Cloud service to replace their self-built database, which of the following services should it choose?
- A. AsparaDB for RDS
- B. Alibaba Cloud CDN (Content Delivery Network)
- C. Deploy more ECS instances
- D. Server Load Balancer (SLB)
Answer: C
NEW QUESTION 49
Your friend purchases some Alibaba Cloud resources and uses them to build an online training website. Before the site goes online, your friend wants to perform some performance tests but doesn't know how to do it. In this case, which of the following services can help?
- A. Load and Performance Testing Service
- B. Support Ticket Service
- C. After-Sales Support Service
- D. None Of The Above
Answer: C
Explanation:
Explanation/Reference: https://www.alibabacloud.com/support/after-sales
NEW QUESTION 50
Some applications may encounter large traffic fluctuations within a short period. When ECS is used with__________, the number of ECS instances is automatically adjusted based on traffic.
- A. RDS
- B. Auto Scaling
- C. OSS
- D. Server Load Balancer
Answer: B
NEW QUESTION 51
Which of the following statements about file uploading to OSS strategy is not correct?
- A. If you are using OSS to store some log files which are continuously being updated, you better choose streaming method to be able to append to one existing object instead of overwriting.
- B. If you are uploading some small files (<1m), you can choose using put method to be able finish uploading in one http request.
- C. All file uploading method provided by Alibaba Cloud OSS service will support resuming from break point.
- D. If you need to upload very large file you better use multi-part uploading to get the capability of resuming from break point.
Answer: A
NEW QUESTION 52
Alibaba Cloud Object Storage Service (OSS) is a massive, highly available, secured and cost effective storage service. One of the special characteristics of OSS is its superior data reliability, because of its underlying backup technology and policies. Which of the following statement about OSS backup is correct?
- A. OSS supports 3 internal data copies, no human intervention is required to recover the data when anything goes wrong.
- B. OSS leverages RAID0+1 configuration of its underlying physical hard disks. There is no impact even if 2 hard disks were to fail simultaneously.
- C. Customer has to safeguard their own data. OSS provides various backup interfaces to facilitate offsite backups.
- D. OSS supports 3 internal data copies, so the data can be manually recovered should there be any problem.
Answer: C
NEW QUESTION 53
Multiple lower-configuration I/O-optimized ECS instances can be used with ___________ to deliver a high- availability architecture.
- A. Server Load Balancer
- B. RDS
- C. Auto Scaling
- D. OSS
Answer: A
NEW QUESTION 54
You canan ECS instance's configuration. (Choose two.)
- A. uploaded
- B. downgraded
- C. downloaded
- D. upgraded
Answer: B,D
NEW QUESTION 55
ECS can be used along with ______ to store static images, videos, and reducing storage fees.
- A. VPC
- B. RDS
- C. OSS
- D. Server Load Balancer
Answer: C
Explanation:
Explanation/Reference: http://static-aliyun-doc.oss-cn-hangzhou.aliyuncs.com/download/pdf/DNA0011858383_en- US_intl_190320132947_public_91775d442a4b315acafcb25df8bcc84f.pdf
NEW QUESTION 56
When we talk about the 'Elastic' feature for ECS product, we are not talking about .
- A. Elastic Network
- B. Elastic Storage
- C. Elastic Administration
- D. Elastic Computing
Answer: C
NEW QUESTION 57
Auto Scaling is a management service that can automatically adjust elastic computing resources based on your business needs and policies. It supports adding existing ECS instances into the scaling group, whose status however must be________.
- A. Preparing
- B. Running
- C. Stopped
- D. Created
Answer: B
NEW QUESTION 58
Which method is not supported by OSS to create a bucket?
- A. through cloud console
- B. through ECS instance filesystem directory operation
- C. through oss cmd tool
- D. through OSS API/SDK
Answer: C
NEW QUESTION 59
SQL injection is a common application layer attack, usually through building special input parameters and pass it to web applications to steal or sabotage the application data. Which of the following is the target for SQL injection?
- A. Web application
- B. Confidential files on the server
- C. Database
- D. Pictures on server
Answer: C
NEW QUESTION 60
A company uses Alibaba Cloud SLB and Auto Scaling at the same time, hoping this combination can help save O&M cost and provide a stable and reliable system.
However, because they do not have relevant experience, the company's engineers listed some precautions based on their understanding, and turned the list to you for advice.
As an expert of Alibaba Cloud, you tell them only________is correct.
- A. All backend servers under the same SLB instance must have the same configuration
- B. SLB instances must have Health Check enabled, or they cannot be used together with Auto Scaling
- C. All ECS instances under the same SLB instance must be running on the same operating system
- D. All backend servers under the same SLB instance must be in the same Scaling Group
Answer: B
NEW QUESTION 61
ECS is a highly flexible service. It can be used independently as a simple web server, or used with other Alibaba Cloud products, such as OSS and CDN, to provide advanced solutions. ECS can be used in applications such as: ______________. (Choose four.)
- A. simple web applications
- B. Databases
- C. no limited online storage
- D. Official corporate websites
- E. large-traffic apps
Answer: A,B,D,E
Explanation:
Explanation/Reference:
NEW QUESTION 62
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