Practice Free CAP-C01 Exam Online Questions
Which of the following features are provided by RDS by default? (Choose three.)
- A . Automatic backup, which supports restoring data to any point in time within the last 15 days
- B . Backup of the master and secondary databases
- C . Dedicated team performing professional O&M on the backend side
- D . Real-time patching for database security vulnerabilities
A, B, C
Explanation:
Alibaba Cloud RDS offers automatic backups (with point-in-time recovery capabilities, usually up to a certain retention period), backup for both primary and secondary databases, and a dedicated team for backend operations and maintenance (O&M). Real-time patching for security vulnerabilities is generally not automatic but is managed as part of periodic updates or urgent patching requirements, making option D incorrect.
Reference: Alibaba Cloud RDS Features
There are two types of Alibaba Cloud SLB: private network SLB and public network SLB. You can freely choose between private network SLB and public network SLB based on your business scenarios. Alibaba Cloud will assign a private or public IP address to your SLB according to your choice.
- A . TRUE
- B . FALSE
A
Explanation:
Alibaba Cloud SLB allows users to select between private and public SLB based on business needs. A public SLB provides a public IP address for Internet-facing applications, while a private SLB provides a private IP address for internal applications within a VPC. Alibaba Cloud assigns the appropriate IP type automatically based on the user’s selection of SLB type.
Reference: Alibaba Cloud SLB Types and IP Assignment
You are using Auto Scaling with one scaling group already created, then you want to execute a task at a specific time such as removing 1 ECS instance every night at 00:00.
To achieve this, which of the following operations should be performed? (Number of correct answers: 2)
- A . Create a new scaling group.
- B . Create a scaling rule.
- C . Create a scheduled task.
- D . Create an event-triggered task.
To meet business requirements, a user requires that the backend server of an SLB instance include a primary ECS instance and a secondary ECS instance. When the primary instance is working properly, the traffic is only forwarded to the primary ECS, when the primary instance is down, traffic is switched to the standby instance. In this case, you can create an active/standby server group on the backend of the SLB instance Which kind of listener supports this feature? (Number of correct answers: 2)
- A . HTTPS
- B . HTTP
- C . UDP
- D . TCP
AC
Explanation:
Active/standby server groups are a feature of Server Load Balancer (SLB) that allows you to configure a primary ECS instance and a secondary ECS instance for the backend of an SLB instance 1. When the primary instance is working properly, the traffic is only forwarded to the primary ECS. When the primary instance is down, traffic is switched to the standby instance 1. This feature is supported by TCP and HTTPS listeners, but not by HTTP and UDP listeners 1. TCP and HTTPS listeners support session persistence, which ensures that requests from the same client are always forwarded to the same backend server2. HTTP and UDP listeners do not support session persistence, and they use round-robin or weighted round-robin algorithms to distribute traffic among the backend servers2.
Reference: 1: Create an active/standby server group 2: [Configure a listener]
The daily PV volume of a community website is as high as 20 million. The applications of the website are deployed on ECS instances while logs are stored on the data disks of a single ECS instance.
Now, the website wants to extend the log retention period to 24 months and ensure that logs can be quickly downloaded when needed. The current data disks they have can only help retain three months of logs In this case, ________ is the ideal solution for solving the log retention issue.
- A . CDN
- B . Container Service
- C . OSS
- D . ApsaraDB for RDS
C
Explanation:
OSS (Object Storage Service) is a secure, cost-effective, and highly reliable cloud storage service that allows you to store, back up, and archive any amount of data in the cloud 1. OSS is ideal for storing logs, as it provides 99.9999999999% (12 nines) durability and 99.995% availability or service continuity 1. OSS also supports lifecycle management, which allows you to automatically delete or transition objects to lower-cost storage classes based on your predefined rules2. OSS offers four tiers of storage: Standard, Infrequent Access, Archive, and Cold Archive. Each tier is cost-optimized for specific storage patterns 1. The Archive and Cold Archive tiers are suitable for storing infrequently accessed data, such as logs, for a long time. The Archive tier offers data retrieval time within one minute, while the Cold Archive tier offers expedited data retrieval time within an hour 1. Therefore, OSS can help the website extend the log retention period to 24 months and ensure that logs can be quickly downloaded when needed.
CDN (Content Delivery Network) is a distributed network that delivers content to users based on their geographic locations, the origin sites, and the content delivery nodes3. CDN is mainly used for content distribution, such as static web pages, images, videos, and downloads3. CDN is not suitable for storing logs, as it does not provide data durability or lifecycle management.
Container Service is a high-performance and scalable container application management service that enables you to use Docker and Kubernetes to manage the lifecycle of containerized applications4. Container Service is mainly used for deploying and orchestrating microservices, serverless applications, and big data applications4. Container Service is not suitable for storing logs, as it does not provide data durability or lifecycle management.
ApsaraDB for RDS (Relational Database Service) is a stable and reliable online database service that supports MySQL, SQL Server, PostgreSQL, MariaDB, and PPAS5. ApsaraDB for RDS is mainly used for storing and processing structured data, such as user information, transaction records, and product catalogs5. ApsaraDB for RDS is not suitable for storing logs, as it is more expensive and less scalable than OSS.
Reference: Object Storage Service (OSS) – Alibaba Cloud, Lifecycle management – Object Storage Service – Alibaba Cloud Documentation Center, Content Delivery Network (CDN) – Alibaba Cloud, Container Service – Alibaba Cloud, ApsaraDB for RDS – Alibaba Cloud
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.
BCDF
Explanation:
When creating an Alibaba Cloud VPC, you must specify Intranet network segments used in the VPC with CIDR Block. This CIDR Block can later be modified after the VPC is created
- A . TRUE
- B . FALSE
A large shopping mall deploys a new video surveillance system. The five-floor building in which the mall is located has installed 35 HD cameras to monitor the major exits. The surveillance system is deployed on an ECS instance, which has four 2 TB data disks to store video data.
However, video data grows so rapidly that the engineers find the ECS will run out of storage space within 2 weeks.
In this case, ___________ product is thought to be the best solution for addressing the storage
challenge while ensuring quick access to historical video data when needed.
- A . Container Service
- B . ECS
- C . OSS
- D . CDN
C
Explanation:
Alibaba Cloud OSS (Object Storage Service) is the ideal solution for storing large volumes of video data generated by a surveillance system. OSS provides scalable, secure, and cost-effective storage that can accommodate growing data needs without the space limitations of local ECS disks.
Additionally, OSS enables easy access to historical data when required, making it well-suited for video storage in use cases like surveillance.
Reference: Alibaba Cloud OSS Documentation
When you initiate a request via an Open API provided by Alibaba Cloud Elastic Compute Service (ECS), whether the request is initiated successfully or not, the server will return
______________________ as a unique identifier.
- A . Messageld
- B . Requestld
- C . Responseld
- D . Time stamp
B
Explanation:
In Alibaba Cloud ECS, whenever an API request is made, a unique identifier called the RequestId is generated and returned. This ID is generated regardless of the request’s success or failure. RequestId serves as a unique identifier for tracking and debugging specific requests within the ECS environment, allowing users to trace and troubleshoot individual API calls. This practice ensures that issues can be resolved more efficiently by tracking the specific request, and it is a common practice across many Alibaba Cloud services.
Reference: Alibaba Cloud ECS API Documentation
Two modes are available for deleting scaling groups in Auto Scaling: ForceDelete mode and non-ForceDelete mode.
Which of the following conditions must be met in non-ForceDelete mode? (Choose two.)
- A . No scaling activities are ongoing in the scaling group
- B . No ECS instances exist in the scaling group
- C . No scheduled tasks and event-triggered tasks exist in the scaling group
- D . The scaling group is not working in conjunction with SLB and ApsaraDB for RDS
A, B
Explanation:
In non-ForceDelete mode, a scaling group can only be deleted if no ECS instances exist within it and no scaling activities are currently in progress. This ensures that resources are properly released and no scaling operations are disrupted during deletion. Scheduled and event-triggered tasks (option C) and SLB/RDS integrations (option D) do not need to be removed to delete the scaling group in non-ForceDelete mode.
Reference: Alibaba Cloud Auto Scaling Group Deletion