Practice Free CAP-C01 Exam Online Questions
A startup team developed an app named “Public Image Service,” which provides image management services for e-commerce websites. The app includes a self-developed API for file uploads, queries, and deletions, and aims to manage a large number of small images with fast global access. Currently, 500 GB of images and files are uploaded daily. The team is ready to migrate all applications to Alibaba Cloud. They should at least choose Alibaba Cloud ___________________ service. (Choose three.)
- A . Object Storage Service
- B . Elastic Compute Service
- C . Content Delivery Network
- D . Auto Scaling
A, B, C
Explanation:
For a service focused on storing and providing fast access to a massive amount of images, the team should use:
Object Storage Service (OSS): For scalable and cost-effective storage of large image datasets.
Elastic Compute Service (ECS): For running the application’s backend and API logic.
Content Delivery Network (CDN): To cache and accelerate image delivery globally, improving access speed for users worldwide.
While Auto Scaling is useful for applications with highly variable compute demands, it is not essential for this setup based on the described requirements.
Reference: Alibaba Cloud OSS and CDN for Media Services
When using Alibaba Cloud SLB to forward layer 7 (HTTP) service requests, SLB will replace the IP address in the HTTP header file to forward requests. Therefore, the access IP address that can be seen on the backend ECS instance is the IP address of SLB instead of the client’s real IP address.
- A . TRUE
- B . FALSE
B
Explanation:
When forwarding layer 7 (HTTP) requests, Alibaba Cloud SLB preserves the client’s real IP address by including it in the X-Forwarded-For header. This allows the backend ECS instance to access the client’s actual IP rather than the SLB’s IP address. This practice is common for maintaining accurate client IP information in HTTP forwarding scenarios.
Reference: Alibaba Cloud SLB X-Forwarded-For Header
OSS supports deleting buckets. Before deleting a bucket, you must delete all the files in the bucket, including incomplete upload segments.
- A . TRUE
- B . FALSE
A
Explanation:
In Alibaba Cloud OSS, a bucket cannot be deleted until all contents, including files and incomplete multipart upload segments, are removed. This prevents accidental data loss by ensuring no objects remain in the bucket before deletion.
Reference: Alibaba Cloud OSS Bucket Deletion
An insurance company has more than 200,000 online orders per day on their platform. in the past one year, the platform has suffered frequent large volume DDoS attacks (exceeding 10 Gbps).
Which of the following Alibaba Cloud products can the customer use to defend against this type of attacks and ensure service availability? (Single answer)
- A . Anti-DDoS Origin Basic Edition
- B . Managed Security Service
- C . Security Center
- D . Anti-DDoS Pro or Premium Service
When using Alibaba Cloud SLB, a user configures the Health Check as follows: response timeout value set to 5 seconds, Health Check interval set to 2 seconds, unhealthy threshold value set to 3, and healthy threshold value set to 3. That is to say, to confirm a backend ECS instance is healthy, three successive normal responses are required.
If the current status of a backend ECS instance is unhealthy, and you finish the repair work immediately, it will take at least _______________ for SLB Health Check to confirm this instance is
healthy again.
- A . 11 seconds
- B . 21 seconds
- C . 5 seconds
- D . 6 seconds
A
Explanation:
To confirm a previously unhealthy instance is now healthy, Alibaba Cloud SLB requires three consecutive successful health checks. With a health check interval of 2 seconds and a response timeout of 5 seconds, each check cycle takes up to 5 seconds. Therefore, three successive health checks would take a minimum of 5×3=155 times 3 = 155×3=15 seconds in total. However, because the health checks are conducted at 2-second intervals, there’s overlap, reducing the actual time to at least 11 seconds for the SLB to mark the instance as healthy.
Reference: Alibaba Cloud SLB Health Check Documentation
Alibaba Cloud Server Load Balancer (SLB) provides services for distributing traffic among multiple ECS instances. SLB can expand the application system’s service capacity through traffic distribution, and improve the system’s availability by eliminating SPoFs (Single Points of Failure).
Which of the following
statements are correct? (Number of correct answers: 2)
- A . When recreating an SLB instance that has an Internet lp address, a new Internet lP address will be assigned to the SLB instance.
- B . Before using SLB to provide external services, make sure that you have installed and correctly configured the SLB agent on all of the backend ECs instances.
- C . One of SLBs features is the Health Check. f some of the backend ECS instances are down, whereas other backend ECS instances can still provide services, then the system can continue to work normally.
- D . SLB provides a function to automatically synchronize data among backend ECS instances using rsync remote synchronization technology
For ECS and RDS instances under different Alibaba Cloud accounts but in the same region, which of the following statements is NOT correct for migrating self-built MySQL databases (running on ECS) to RDS?
- A . The data can be imported via the Intranet
- B . The data cannot be migrated.
- C . The data can be imported via the public network.
- D . The data can be imported by running mysqldump.
A
Explanation:
Data Transmission Service (DTS) is a real-time data streaming service that supports data transmission between data sources such as relational databases, NoSQL, and Big Data (OLAP). DTS supports data migration, data synchronization, and change data subscription scenarios. DTS can migrate your data to and from most of the widely used commercial and open source databases. It supports homogeneous migrations such as MySQL to MySQL, as well as heterogeneous migrations between different database platforms, such as Oracle to MySQL. Migrations can be from on-premises databases to RDS or ECS, databases running on ECS to RDS, or vice versa, as well as from one RDS database to another RDS database. DTS also supports migrating data between RDS instances of different Alibaba Cloud accounts, as long as they are in the same region 1. Therefore, the statement
B. The data cannot be migrated is NOT correct for migrating self-built MySQL databases (running on ECS) to RDS. The other statements are correct, as the data can be imported via the Intranet, the public network, or by running mysqldump234.
Reference: 1: Migrate Self-built Database to RDS – Alibaba Cloud
2: Migrating a Self-built MySQL Database to Alibaba Cloud RDS for MySQL with Minimal Downtime – Alibaba Cloud Community
3: Migrating Data from a Self-Managed SQL Server Database on an ECS to an ApsaraDB RDS for SQL Server Database
4: Migrate data between RDS instances of different Alibaba Cloud accounts,Data Transmission Service
Alibaba Cloud OSS is a cloud storage service that features massive capacity, outstanding security, low cost, and high reliability. OSS provides multiple types of monitoring reports to help you monitor OSS resource consumption in real time.
Which of the following monitoring functions are supported by OSS? (Choose three.)
- A . Storage space monitoring
- B . User device type (PC end or mobile end) monitoring for accessing OSS files
- C . Monitoring for OSS service requests (including the number of PUT and GET requests)
- D . UV (Unique Visitor) monitoring for OSS service requests
A, C, D
Explanation:
Alibaba Cloud OSS provides monitoring functions such as storage space monitoring, tracking service requests (like PUT and GET requests), and monitoring UV (Unique Visitors) to help analyze usage and performance. However, OSS does not specifically track the device type (e.g., PC or mobile) accessing files, making option B incorrect.
Reference: Alibaba Cloud OSS Monitoring and Metrics
When distributing loads to multiple ECS instances with an Alibaba Cloud Server Load Balancer (SLB). you can obtain the real IP addresses of users who initiate the requests through (Number of correct answers: 2)
- A . ForLayer-7 services, SLB obtains the real IP addresses of the visitors by means of HTTP Heard: X-Forwarded-For, but the "Obtain the Visitors Real IP Address" function must be enabled first.
- B . For Layer-4 services, you can obtain the visitor’s Real lP addresses directly, without any additional settings.
- C . ForLayer-4 services, SLB obtains the real IP addresses of the visitors by means of the HTTP Header: X-Forwarded-For, but the "Obtain the Visitor’s Real IP Address" function must be enabled first.
- D . For Layer-7 services, you can obtain the visitors’ real IP addresses directly, without any additional settings.
Cloud computing adopts a common model in distributed systems, distributing computing tasks to a resource pool comprising many computers. This elastic use of the resource pool allows applications to obtain computing capacity, storage space, and message services as needed.
Which of the following statements are correct about the advantages of public cloud computing over traditional IDC? (Choose four.)
- A . A cloud computing user can quickly deploy applications
- B . A cloud computing user has more flexibility and scalability
- C . A cloud computing user can save the cost of building the infrastructure
- D . A cloud computing user has less management and maintenance work
- E . A cloud computing user can fully manage and control the underlying infrastructure
A, B, C, D
Explanation:
Public cloud computing offers advantages such as rapid deployment, increased flexibility and scalability, reduced costs associated with infrastructure, and minimized management and maintenance efforts. Option E is incorrect, as cloud providers typically manage the underlying infrastructure, and users do not have full control over it. Cloud computing abstracts the infrastructure layer, allowing users to focus on applications without needing to manage physical resources.
Reference: Alibaba Cloud Public Cloud Benefits