QUESTION: 81

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.

Container Service
ECS
OSS
CDN

Answer(s): 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

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QUESTION: 82

The maximum number of connections for an RDS instance depends on ____________.

Memory size
CPU utilization rate
Disk capacity
Network traffic

Answer(s): A

Explanation:

The maximum number of connections to an RDS instance primarily depends on the memory size of the instance. Higher memory capacity allows for more simultaneous connections, as memory is a key resource in managing and maintaining connections. Alibaba Cloud RDS scales the connection limit based on the instance's memory allocation to ensure stable database performance.

Reference:

Alibaba Cloud RDS Specifications

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QUESTION: 83

Which of the following statements is true for RDS?

Multiple databases can be created for one instance
Databases with the same name are allowed in the same instance
Resources are not shared among the databases in the same instance
None of the above is true

Answer(s): A

Explanation:

In Alibaba Cloud RDS, multiple databases can be created within a single instance, allowing users to manage different databases under one RDS instance efficiently. However, databases within the same instance must have unique names, and resources such as CPU and memory are shared across databases within the same instance, contrary to the options provided in answers B and C.

Reference:

Alibaba Cloud RDS Instance Management

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QUESTION: 84

Which of the following statements is wrong about changing the specification of an RDS instance?

The specification of an RDS instance can be upgraded as needed
The service will not be interrupted during upgrade/downgrade
The database version cannot be downgraded
MySQL 5.1 can be directly upgraded to MySQL 5.6

Answer(s): B

Explanation:

When changing the specifications of an RDS instance, service interruptions can occur during some upgrade and downgrade operations, depending on the RDS instance type and the complexity of the change.
While upgrades are generally supported, certain modifications may result in brief downtime as the system reconfigures resources. This is contrary to option B. Additionally, database version downgrades are restricted, and MySQL 5.1 can indeed be upgraded directly to MySQL 5.6 in Alibaba

Cloud RDS.

Reference:

Alibaba Cloud RDS Specifications Upgrade Guide

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Free ACP-CLOUD1 Exam Braindumps (page: 21)

QUESTION: 81

Explanation:

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QUESTION: 82

Explanation:

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QUESTION: 83

Explanation:

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QUESTION: 84

Explanation:

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