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Alibaba ACA-Cloud1 Exam Practice Questions (P. 5)

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Question #21
Which of the following is not the database type supported by RDS?
  1. A
    MySQL
  2. B
    SQL Server
  3. C
    Postgre SQL
  4. D
    Oracle database

Correct Answer:
D
Reference:
https://aws.amazon.com/rds/features/

Question #22
Which of the following statements is wrong when comparing RDS with self-built database?
  1. A
    RDS features a high availability of 99.95% while self-built database requires you to implement data protection, primary-standby replication, and RAID all by yourself.
  2. B
    RDS provides automatic backup while self-built database requires you to prepare storage space for backup copies and regularly verify that these copies can be restored.
  3. C
    Self-built database supports quick deployment and elastic scaling.
  4. D
    RDS requires no O&M while self-built database requires a dedicated DBA for maintenance, which results in high HR cost.

Correct Answer:
C

Question #23
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?
  1. A
    One
  2. B
    Six
  3. C
    Zero
  4. D
    Five

Correct Answer:
C

Question #24
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 `Adjust to 10 ECS instances`, and creates a scheduled task based on this rule.
And then, the customer checks the scaling group and see it already contains 6 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?
  1. A
    Eight
  2. B
    Ten
  3. C
    Six
  4. D
    Five

Correct Answer:
D

Question #25
Auto Scaling is a management service that can automatically adjust elastic computing resources based on your business needs and policies. Which of the following is not the feature supported by Alibaba Cloud Auto Scaling?
  1. A
    Elastic Scale-Out
  2. B
    Elastic Scale-In
  3. C
    Elastic Self-Health
  4. D
    Elastic Self-Diagnostic

Correct Answer:
D
Reference:
https://www.alibabacloud.com/product/auto-scaling

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