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NEW QUESTION 13
Cloud disks are reliable because they use to provide block-level data storage for ECS instances, ensuring 99.9999999% data reliability.
- A. a double copy distributed system
- B. a Linux file system
- C. a file system
- D. a distributed file management system with 3 redundant copies
Answer: D
Explanation:
An ECS disk can be used jointly or separately to meet the requirements of different application scenarios. ECS disks are categorized into ephemeral SSD disks and cloud disks. Compared with ephemeral SSD disks, cloud disks are more reliable as they use a triplicate distributed system to provide block-level data storage for ECS instances, ensuring 99.9999999% data reliability.
Reference:
http://docs-aliyun.cn-hangzhou.oss.aliyun-inc.com/pdf/ecs-product-introduction-intl-en-2017-03- 24.pdf
NEW QUESTION 14
You built an online shop using Alibaba Cloud services (ECS, RDS, ...etc.) and very soon you'll have a campaign that every customer that invites 3 friends will get a 50% off coupon. To avoid HTTP flood attacks and ensure only genuine customers (not bots) joining the event, which security product should you choose?
- A. WAF
- B. Server Guard
- C. Anti-DDoS Basic
- D. Anti-DDoS pro
Answer: A
Explanation:
Explanation
After adding your website to the WAF protection list, you can enable HTTP Flood protection and select an appropriate protection mode for the website
NEW QUESTION 15
Company A builds a sales management platform based on Alibaba Cloud services, using 3 ECS instances.
One of the ECS instance has MySQL installed as the database server of the platform, the other two are used as WEB servers. After some time, due to the rapid increase of employees and sales analysis requests, the performance of the platform is challenged in terms of response time. Through CloudMonitor, it is found that the average CPU usage reaches 70% for the two WEB server ECS instances and the database load reaches 75% for the database server ECS instance. In this situation, company A may choose which Alibaba Cloud services to improve the performance _________________. (Choose two.)
- A. Use content delivery network, CDN, to accelerate the caching of the platform's css, JavaScript files etc.
- B. Import data into OSS to share the storage load of the platform.
- C. By adding a SLB instance and increase the number of ECS instances to reduce the work load on current ECS instances.
- D. Use RDS to replace existing self-built database, in order to obtain better database performance; also creating RDS read-only instances to handle read-only requests, hence reduce the work load on master RDS instance.
Answer: C,D
NEW QUESTION 16
You are developing a highly available web application using stateless web servers. Which services are suitable for storing session state data? (Choose two.)
- A. RDS
- B. Table Store
- C. OSS
- D. MaxCompute
Answer: A,C
NEW QUESTION 17
Cloud disks are reliable because they use_________to provide block-level data storage for ECS instances, ensuring 99.9999999% data reliability.
- A. a double copy distributed system
- B. a Linux file system
- C. a file system
- D. a distributed file management system with 3 redundant copies
Answer: D
Explanation:
Explanation
An ECS disk can be used jointly or separately to meet the requirements of different application scenarios. ECS disks are categorized into ephemeral SSD disks and cloud disks. Compared with ephemeral SSD disks, cloud disks are more reliable as they use a triplicate distributed system to provide block-level data storage for ECS instances, ensuring 99.9999999% data reliability.
NEW QUESTION 18
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
NEW QUESTION 19
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:
Reference:
https://aws.amazon.com/rds/features/
NEW QUESTION 20
You canan ECS instance's configuration. (Choose two.)
- A. uploaded
- B. downgraded
- C. downloaded
- D. upgraded
Answer: B,D
NEW QUESTION 21
A customer uses Alibaba Cloud Auto Scaling service and creates a scaling group. He/she sets the "Minimum number of instances" to 6 and "Maximum number of instances" to 8.
After correctly configuring scaling settings, the customer adds a scaling rule "Remove 5 ECS instances", and creates a scheduled task based on this rule.
And then, the customer checks the scaling group and see it already contains 8 valid ECS instances, he/she then enables this scaling group immediately.
How many ECS instances are left in the scaling group when the scheduled task is activated once?
- A. Five
- B. Zero
- C. One
- D. Six
Answer: B
Explanation:
Explanation
NEW QUESTION 22
Alibaba Cloud CDN can directly accelerate the access to the files stored in OSS and reduce OSS traffic costs.
- A. TRUE
- B. FALSE
Answer: A
NEW QUESTION 23
Which 2 OSS object types can be configured as parameter for object lifecycle management? (Choose two.)
- A. Snapshot
- B. Infrequent access
- C. Chunk
- D. Archive
Answer: B,D
NEW QUESTION 24
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 25
Alibaba Cloud Monitor service stems from years of experience of server monitoring technology in Alibaba group, leveraging the powerful data analysis capability of Alibaba cloud computing platform to provide monitoring service for various clients' applications and servers. A user receives an alert saying that the IOPS utilization rate for an ECS instance exceeds 80%. Yet, he/she is not sure how to handle the situation, the user may obtain help from Alibaba Cloud through the below methods ____________________? (Choose three.)
- A. Open a ticket to Alibaba Cloud help desk.
- B. Check ECS or CloudMonitor product documents.
- C. Look for answers in Alibaba Cloud forum.
- D. You cannot obtain any help from Alibaba Cloud.
Answer: A,B,C
NEW QUESTION 26
A customer uses Alibaba Cloud Auto Scaling service and creates a scaling group. He/she sets the "Minimum number of instances" to 6 and "Maximum number of instances" to 8.
After correctly configuring scaling settings, the customer adds a scaling rule "Remove 5 ECS instances", and creates a scheduled task based on this rule.
And then, the customer checks the scaling group and see it already contains 8 valid ECS instances, he/she then enables this scaling group immediately.
How many ECS instances are left in the scaling group when the scheduled task is activated once?
- A. Five
- B. Zero
- C. One
- D. Six
Answer: B
NEW QUESTION 27
Multiple lower-configuration I/O-optimized ECS instances can be used withto deliver a high- availability architecture.
- A. Server Load Balancer
- B. RDS
- C. Auto Scaling
- D. OSS
Answer: A
NEW QUESTION 28
You can an ECS instance's configuration. (Choose two.)
- A. uploaded
- B. downgraded
- C. downloaded
- D. upgraded
Answer: B,D
Explanation:
Reference:
https://www.alibabacloud.com/help/doc-detail/25437.htm
NEW QUESTION 29
You are developing a highly available web application using stateless web servers. Which services are suitable for the application? (Choose three.)
- A. SLB
- B. ECS
- C. RDS
- D. OSS
- E. MaxCompute
Answer: B,C,D
Explanation:
Explanation/Reference: http://docs-aliyun.cn-hangzhou.oss.aliyun-inc.com/pdf/slb-faq-intl-en-2017-03-29.pdf
NEW QUESTION 30
Server Load Balancer supports health checks for ECS instances and allows user to specify the frequency. If an ECS instance does not qualify the health check, traffic will not be forwarded to that instance, thereby ensuring application availability.
- A. TRUE
- B. FALSE
Answer: B
Explanation:
Explanation
NEW QUESTION 31
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. Configure Auto Scaling appropriately to automatically upgrade/downgrade the ECS instances.
- B. Configure Auto Scaling appropriately to automatically add or reduce ECS instances.
- C. Create 30 ECS instances based on the custom image and add them to SLB. 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.
- 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: B
NEW QUESTION 32
A/Anis a copy of data on a disk at a certain point in time.
- A. EIP
- B. snapshot
- C. image
- D. template
Answer: B
NEW QUESTION 33
Alibaba Cloud OSS is a cloud storage service that features massive capacity, outstanding security, low cost, and high reliability. To control the access to the files stored on OSS, OSS provides multiple access permissions for each bucket. These bucket permissions are ____________. (Choose three.)
- A. Private
- B. Public-read-write
- C. Private-read
- D. Public-read
Answer: A,B,D
Explanation:
Explanation/Reference: https://www.alibabacloud.com/help/doc-detail/100676.htm
NEW QUESTION 34
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
Explanation:
Reference:
https://www.alibabacloud.com/help/doc-detail/25371.htm
NEW QUESTION 35
Company A builds a sales management platform based on Alibaba Cloud services, using 3 ECS instances. One of the ECS instance has MySQL installed as the database server of the platform, the other two are used as WEB servers. After some time, due to the rapid increase of employees and sales analysis requests, the performance of the platform is challenged in terms of response time. Through CloudMonitor, it is found that the average CPU usage reaches 70% for the two WEB server ECS instances and the database load reaches
75% for the database server ECS instance. In this situation, company A may choose which Alibaba Cloud services to improve the performance. (Choose two.)
- A. Use content delivery network, CDN, to accelerate the caching of the platform's css, JavaScript files etc.
- B. Import data into OSS to share the storage load of the platform.
- C. By adding a SLB instance and increase the number of ECS instances to reduce the work load on current ECS instances.
- D. Use RDS to replace existing self-built database, in order to obtain better database performance; also creating RDS read-only instances to handle read-only requests, hence reduce the work load on master RDS instance.
Answer: C,D
NEW QUESTION 36
Alibaba Cloud does not support Intranet communication between products that are not in the same region, which does not mean ______________?
- A. ECS instances and other products in different regions, such as ApsaraDB for RDS and OSS instances, cannot communicate with each other on the intranet.
- B. Server Load Balancer cannot be deployed for ECS instances in various regions.
- C. ECS instances in different regions cannot communicate with each other on the intranet.
- D. Server Load Balancer can be deployed for ECS instances in various regions.
Answer: A
Explanation:
Explanation/Reference: https://www.alibabacloud.com/help/doc-detail/40654.htm
NEW QUESTION 37
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