When using Alibaba Cloud OSS, you can set access control in 3 different levels, which are (Choose three.)
Correct Answer: A,B,D
Question 22
In mainland China, the approval requirements for business record filing vary depending on provincial communication management bureaus.
Correct Answer: A
Question 23
Which 2 OSS object types can be configured as parameter for object lifecycle management? (Choose two.)
Correct Answer: A,C
Explanation OSS object types are the storage classes that define the performance and cost of storing objects in OSS. OSS supports four object types: Standard, Infrequent Access (IA), Archive, and Cold Archive1. Each object type has different characteristics and scenarios, such as availability, durability, minimum storage duration, and storage overhead2. Object lifecycle management is a feature that allows you to manage objects efficiently and minimize costs throughout the lifecycle of the objects in your bucket. Lifecycle settings create a set of rules that help define the actions that an OSS bucket must perform on a group of objects. For example, you can configure lifecycle rules to automatically delete expired objects, or convert the storage class of objects to a lower-cost object type3. You can configure lifecycle rules based on the object type of the objects in your bucket. You can specify the object type as a parameter for the lifecycle rule, and OSS will apply the rule to the objects that match the object type. For example, you can create a lifecycle rule to convert the object type of objects from Standard to IA after 30 days, and then to Archive after 180 days4. Therefore, the correct answer is A. Infrequent access and C. Archive, as these are two of the object types that can be configured as parameters for object lifecycle management. B. Snapshot and D. Chunk are not valid object types in OSS. References: 1: Overview of object types - Object Storage Service - Alibaba Cloud Documentation Center2: Object Storage Service (OSS) - Alibaba Cloud3: Manage Your OSS Storage Costs Using Lifecycle Policies - Alibaba Cloud4: Lifecycle rules based on the last modified time - Object Storage Service - Alibaba Cloud Documentation Center.
Question 24
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?
Correct Answer: A
Explanation According to the Alibaba Cloud Academy, Auto Scaling is a service that automatically creates and releases ECS instances based on pre-defined rules in order to scale services to match demand. Furthermore, it can configure server load balancer and relational database service white lists, without any manual intervention. Therefore, using Auto Scaling is the most preferred method from the perspective of cost and implementation simplicity, as it can dynamically adjust the number of ECS instances according to the traffic fluctuations, without requiring manual operations or wasting resources. The other methods are either too complex, inefficient, or costly to implement. References: Introduction to Alibaba Auto Scaling - Cloud Academy, ACA Cloud Computing Exam Preparation Course - Alibaba Cloud, Module 4: Cloud Computing Elasticity, Lesson 1: Auto Scaling, Slide 2.
Question 25
Alibaba Cloud relational database service (RDS) is a stable, reliable and elastic online database service. RDS supports below database types ? (Choose three.)
