An Alibaba Cloud RDS read-only instance has its data synchronized from the master instance. Which of the following can be performed by the read-only instance from the RDS management console? (Single answer)
- A . Backup policy configuration and manual backup
- B . B. Database creation or deletion
- C . Editing its own whitelist
- D . Account authorization and account password changing
Which of the following statements is true for Alibaba Cloud RDS? (Single answer)
- A . Multiple databases can be created for one instance.
- B . Databases with the same name are allowed to be hosted on the same instance.
- C . Physical host CPU and Memory resource are not shared among the common type of RDS instances.
- D . All editions of RDS support HA mode.
lf you need to accelerate a certain domain name (such as abc.com) via Alibaba Cloud Content Delivery Network (CDN), you must add it to "CDN Domain Name List" in the CDN service. After added successfully, you will get a CNAME address A. Next, you need to modify domain name resolution and direct the domain name (such as abc.com) to CNAME address A. Which of the following is a NOT correct description of modifying domain name resolution? (Single answer)
- A . The DNS service provider used by the domain name (such as abc.com) must support intelligent resolution.
- B . The DNS service provider used by the domain name (such as abc.com) can be companies other than Alibaba Cloud.
- C . If your domain name (such as abc.com) is transferred to Alibaba Cloud in advance, and managed by the same Alibaba Cloud account, you can perform one-step resolution modification.
- D . The CNAME address allocated to the domain name (such as abc.com) will point to an IP address. This IP address resolving mechanism is intelligently managed by Alibaba Cloud CDN system.
Company G developed a shopping App. The system is constructed based on Alibaba Cloud products. They use Elastic Compute Service (ECS) instances and object Storage Service (OSS) in North China 1region, and store static web pages and images on OSS.
After the App went online, the access speed in mainland China is acceptable. Recently, the company decided to expand to the U.S. market and requires an acceptable access speed too for U.S. users. To address this requirement, company G should select Alibaba Cloud ___service. (Single answer)
- A . Enabling object Storage Service (OSS) in West US region with Content Delivery Network (CDN) in North China 2 regions
- B . Enabling Object Storage Service (OSS) in North China 1 region with Content Delivery Network(CDN)accelerating West Us(Silicon Valley) region
- C . Enabling Auto Scaling and more Elastic Compute Service(ECS) instances
- D . Enabling Auto Scaling and Content Delivery Network(CDN)
A customer uses Alibaba Cloud Auto Scaling service and creates a scaling group. He/she sets the "Minimum number of instances" to 6 and "Maximum number of instances" to 8.After correctly configuring scaling settings, the customer adds a scaling rule "Adjust to 10 ECS instances " and creates a scheduled task based on this rule. And then, the customer checks the scaling group and see it already contains 6 valid ECS instances, he/she then enables this scaling group immediately. How many ECS instance will be in the scaling group when the scheduled task is activated once? (Single answer)
- A . 8
- B . 10
- C . 6
- D . 5
Which of the following ports does RDs for MySQL listen on by default? (Single answer)
- A . Port 8080
- B . Port 3060
- C . Port 3600
- D . Port 3306
Which of the following statements is NOT correct, when comparing RDS with a self-built database? (Single answer)
- A . RDS features a high availability of 99.95% while self-built databases require you to implement data protection, primary-standby replication, and RAID all by yourself.
- B . RDS provides automatic backup while self-built databases require you to prepare storage space for backup copies and regularly verify that these copies can be restored.
- C . Self-built database support quick deployment and elastic scaling.
- D . RDS requires no O&M while self-built database require a dedicated DBA for maintenance
which results in high HR costs.
Which of the following statements about file uploading to OSS is NOT correct? (Single answer)
- A . All file uploading method provided by Alibaba Cloud OSS service will support resuming from break point.
- B . If you are uploading some small files(<1m), you can choose PUT method to finish uploading in one HTTP request.
- C . if you are using OSs to store some log files which are continuously being updated it’s better to choose APPEND method instead of overwriting or generating new versions.
- D . If you need to upload very large files it’s better to use multi-part uploading to get the capability of resuming from break point.
in Alibaba Cloud 0bject Storage, users want to use graphical tools to upload and download object files. Which tools can they use? (Single answer)
- A . ossbrowser
- B . ossutil
- C . osscmd
- D . ossfs
Alibaba Cloud Object Storage Service (OSS) is a massive, highly available, secured and cost-effective storage service. One of the special characteristics of OSS is its superior data reliability, because of its underlying backup technology and policies. Which of the following statements about OSS backup is correct? (Single answer)
- A . OSS supports 3 internal data copies, so the data can be manually recovered should there be any problem.
- B . Customer has to safeguard their own data. OSS provides various backup interfaces to facilitate offsite backups.
- C . OSS leverages RAID0+1 configuration of its underlying physical hard disks. There is no impact even if 2 hard disks were to fail simultaneously.
- D . OSS supports 3 internal data copies, no human intervention is required to recover the data when anything goes wrong.
Alibaba Cloud 0bject Storage 0SS can upload object files through the console. What is the largest object file uploaded? (Single answer)
- A . 1GB
- B . 5GB
- C . 10GB
- D . 1TB
Auto Scaling is a management service that can automatically adjust elastic computing resources based on your business needs and policies. This service can automatically adjust. (Single answer)
- A . Number of ECS instances
- B . CPU for ECS instances
- C . Memory size for ECS instances
- D . Bandwidth for ECS instances
When using Auto Scaling, you want to add/remove ECS instances based on the utilization rate of computing resources. For example, you want to remove one ECS instance when the average CPU utilization rate is not greater than 30%. In this case, you need to set the scaling rule "Remove 1 ECS instance" and _____to finish the configuration. (Single answer)
- A . Create a scaling configuration
- B . Configure the attributes of the scaling group
- C . Create a Scheduled task
- D . Create an Event-triggered task
You have bought an ECS instance on Alibaba Cloud. After deploying a Python environment on it which of the following is the easiest and quickest way to monitor whether the Python process is running normally and report an alert if the process is accidentally terminated? (Single answer)
- A . Write a script for monitoring by yourself.
- B . Use process monitor of ECS instance monitoring.
- C . Use site monitoring.
- D . Log on to the ECS instance console.
Many websites have suffered DDoS attacks of different volumes. Therefore, accurate understanding of DDoS attacks is critical to website security protection. Which of the following statements about DDoS attacks is the MOST accurate? (Single answer)
- A . DDoS attacks primarily target databases.
- B . A DDoS attacks crack the server’s logon password by means of a massive number of attempts.
- C . The main purpose of a DDoS attack is to prevent the target server from providing normal services. Currently the DoS attack is one of the strongest and most indefensible website attacks.
- D . The purpose of a DDoS attack is to steal confidential information.
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
Alibaba Cloud ECS is a simple and efficient computing service. ECS helps you quickly deploy applications, improve your 0&M efficiency, and reduce IT cost. ECS belongs to this type of service_______.(Single answer)
- A . SaaS (Software as a Service)
- B . PaaS (Platform as a Service)
- C . IaaS (Infrastructure as a Service)
- D . DaaS (Data as a Service)
User A is the system administrator of a company, who often takes business trips to Shanghai. Each time he remotely logs on to the server in Shanghai, an alert is reported, prompting "Someone is remotely logging on to the server. Please pay attention to your server security ". Which of the following methods can be used to quickly and automatically resolve this problem? (Single answer)
- A . Open a ticket immediately to consult Alibaba Cloud engineers.
- B . Ask the company leaders for help.
- C . Log on to Alibaba Cloud console, and add a frequent logon location to the Security Center configuration item.
- D . Call a friend for help, who is a famous hacker in the industry.
lf you need to make the ECS instances under three VSwitches (inside the same Alibaba Cloud VPC) cannot access to each other, meanwhile, not affecting other Intranet connections in this VPC, what should you do? (Single answer)
- A . Create three Security Groups, which respectively include all ECS instances under these three VSwitches . First, configure each of these Security Groups to allow access of all CIDR Blocks. Second, configure each of these Security Groups to forbidden the access of CIDR blocks of the other two VSwitches (given this rule with a higher priority than the previous rule).
- B . Create three Security Groups, which respectively include all ECS instances under these three VSwitches . First, configure each of these Security Groups to allow access of all CIDR Blocks. Second, configure each of these Security Croups to forbidden the access of CIDR blocks of the other two VSwitches(given this rule with a lower priority than the previous rule).
- C . Create one Security Group, which include all ECS instances under these three VSwitches. First, configure each of these Security Groups to allow access of all CIDR Blocks. Second, configure each of these Security Groups to forbidden the access of CIDR blocks of the other two VSwitches (given this rule with a higher priority than the previous rule).
- D . None of these answers are correct.
An online education website is built based on ECS, SLB and Auto Scaling, which greatly reduces resource cost, O&M cost and without compromising system stability and user experience.
Now, the website admin wants to keep the user information (such as source IP, accessed URLs, and duration on each page) for analysis to support their upcoming campaign events. In this case, which of the following statements is NOT correct? (Single answer)
- A . Let each ECS instance in the scaling group keeps the user access information it processes. Thus, the data saved by these ECS instances can be accessed and analyzed at any time, making the solution not only simple, but also efficient, reliable, and cost-effective.
- B . Save user-related access information to ApsaraDB for RDS in real time or quasi real time, which can then be used for performing query and analysis,
- C . Synchronize user-related access information to ApsaraDB for Memcache in real time or quasi real time. Then, access Memcache using an application or make the data in Memcache persistent based on certain rules, and then can use the persistent data for further analysis.
- D . Synchronize user-related access information to OSS in real time or quasi real time for further use.