Many cloud computing service providers support users to activate/create a cloud service through Open API. Which of the following protocols is most not likely to be supported by these Open API?
A. HTTP
B. Restful
C. Web Service
D. PPPoE
A customer uses Alibaba Cloud Auto Scaling service and creates a scaling group He/she sets the "Minimum number of instances" to 2 and "Maximum number of instances" to 7.
After correctly configuring scaling settings, the customer adds a scaling rule "Add 6 ECS instances", and creates a scheduled task based on this rule.
And then, the customer checks the scaling group and see it already contains 3 valid ECS instances, he/she then enables this scaling group immediately.
How many ECS instance will be added in the scaling group when the scheduled task is activated once'?
A. 0
B. 2
C. 4
D. 6
Once ECS is created, you can't change its private IP address anymore.
A. True
B. False
Object Storage Service (OSS) supports access logging. A bucket owner can activate access logging for their buckets in the OSS management console. When access logging is activated for bucket A, OSS automatically accesses the request logs for this bucket (in hours) and generates and writes an object to the user-specified bucket B according to certain naming rules. Which of the following statements is true for OSS logging?
A. Buckets A and B can be separate buckets (or a single bucket) but they must belong to the same user
B. Buckets A and B must be the same bucket.
C. Buckets A and B can belong to different users.
D. Buckets A and B must be different buckets.
Alibaba Cloud Object Storage Service (OSS) is a cloud storage service that features massive capacity, outstanding security, low costs, and high reliability. In an OSS bucket, all elements are stored as________.
A. Hashes
B. Keys
C. Objects
D. Stubs
Compared with traditional physical servers, upgrading an ECS instance is much easier. Which of the following statements about upgrading an ECS instance is false?
A. You can upgrade the CPU, memory, and bandwidth.
B. Upgrading the configuration of the ECS instance requires no' redeployment or data migration.
C. Upgrading network bandwidth does not require the ECS instance to restart.
D. You can change an instance's operating system without rebooting.
A video company uses SLB to distribute user requests to 20 ECS instances with the same configuration to response these requests. As the Spring Festival approaches, service traffic would double during holidays (based on past experience).
Thus, you use Auto Scaling to elastically adjust computing resources. Since the services is online for many years, you have historic records that can help predict the upcoming service traffic and choose the scaling mode freely.
In this scenario, which of the following options are feasible and with minimum operation efforts? (Number of correct answers: 2)
A. Cloud monitor and event-triggered task: Dynamically adds ECS instances during resource shortage and reduces ECS instances during idle hours by monitoring the CPU utilization rate and workload
B. Scheduled task: Increases the number of ECS instances to 40 on the first day of the holidays and reduce the number to 20 after the holidays.
C. Manual mode: Set the minimum number of instances to 40 on the first day of the holidays and change the number to 20 after the holidays.
D. Healthy check mode: Ensures that all the current ECS instances in scaling groups are working correctly to meet user access requests.
Before data communication is setup, the security groups match the security group rules one by one to query whether to allow access requests Assume that the user has created two security group rules 1 and 2 The protocol type, port range, authorization type, and authorization object of the two security group rules are the same. The difference is that Rule 1 is a denial policy, rule 2 is an allowed policy, so the following statement is correct_______ (Number of correct answers 2)
A. If rule 1 and rule 2 have the same priority, the rule of the denial policy takes effect first, and the rule of the allowed policy does not take effect
B. If rule 1 and rule 2 have the same priority, the rule of the allowed policy takes effect first, and the rule that of the denial policy does not take effect.
C. If rule 1 and rule 2 have different priorities, the rule with a small priority number takes effect
D. If rule 1 and rule 2 have different priorities, the rule with a large priority number takes effect.
As a concept stem from cloud computing, cloud storage service provides on-demand storage and data services to users through a unified interface.
Which of the following characteristics about cloud storage are correct? (Number of correct answers: 4)
A. Management and maintenance: To prevent emergent service termination, users need to know the underlying detail like how the data is archived in the resource pool.
B. Service on demand Cloud storage has a huge resources pool, users can apply for and use the resources on demand.
C. High reliability and availability: Provides very high reliability and availability through technologies like 3 redundant copies, automatic failure recovery, etc.
D. Ultra-large scale: Data storage can reach TB or even PB level
E. Transparent service: Provides the service through a single SDK
F. High scalability Storage capacity can be dynamically scaled to meet the needs.
After creating an RDS for MySQL read-only instance, which of the following CAN NOT be performed by the read-only instance in RDS management console?
A. Parameter configuration
B. Specification change
C. SQL log auditing
D. Intranet/Internet switchover
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