EMT Practice Test

1. Question Content...

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Question1: 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 "Remove 5 ECS instances", and creates a scheduled task based on this rule.
And then, the customer checks the scaling group and see it already contains 8 valid ECS instances, he/she then enables this scaling group immediately.
How many ECS instances are left in the scaling group when the scheduled task is activated once?

Question2: Your website has oscillating traffic peaks that are difficult to predict in advance. In this scenario, it is recommended to use SLB andtogether with ECS.

Question3: Alibaba Cloud provides anti-DDoS products of different levels. If the service availability needs to be kept at 99.9% or higher under DDoS attacks, which of the following is the MOST suitable product?

Question4: A company uses Alibaba Cloud SLB and Auto Scaling at the same time, hoping this combination can help save O&M cost and provide a stable and reliable system.
However, because they do not have relevant experience, the company's engineers listed some precautions based on their understanding, and turned the list to you for advice.
As an expert of Alibaba Cloud, you tell them only _______________ is correct.

Question5: RDS provides whitelist access policies. You can set permitted IP addresses and IP network segments to effectively prevent hackers from attacking the server by port scanning.

Question6: Which of the followings are not the operations that you can do on a cloud disk snapshot? (Choose two.)

Question7: Which of the following statements is wrong when comparing RDS with self-built database?

Question8: Multiple lower-configuration I/O-optimized ECS instances can be used with ___________ to deliver a high- availability architecture.

Question9: ECS is a highly flexible service. It can be used independently as a simple web server, or used with other Alibaba Cloud products, such as OSS and CDN, to provide advanced solutions. ECS can be used in applications such as: . (Choose four.)

Question10: Which of the following statements to OSS bucket is not correct?

Question11: Which of the followings are not the operations that you can do on a cloud disk snapshot? (Choose two.)

Question12: Alibaba Cloud does not support Intranet communication between products that are not in the same region, which does not mean?

Question13: An enterprise hosts their servers (include both Linux and Windows servers) in a traditional IDC. Every night hackers with IP addresses from many countries try to crack the password of their servers, making the administrator terribly worried about this. However, because of work requirements, the remote management port of these servers must be opened to public network.
The administrator heard that Alibaba Cloud has solutions that can help customers improve the security of their systems. Therefore, he/she wants to migrate the system to Alibaba Cloud. Which of the following functions should the administrator activate in Alibaba Cloud to reduce the possibility of brute force password cracking?

Question14: Alibaba Cloud OSS is a cloud storage service that features massive capacity, outstanding security, low cost, and high reliability. To control the access to the files stored on OSS, OSS provides multiple access permissions for each bucket. These bucket permissions are . (Choose three.)

Question15: Alibaba Cloud provides powerful security services (the same level of security services used to support Alibaba Group double 11 shopping festival). However, you have to pay first before using any of the security services.

Question16: RDS for MySQL is a PaaS, which means after creating the RDS instance, the user does not need to take care of the underlying OS, runtime environment of software packages. These would be taken care of by Alibaba Cloud.

Question17: 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 statement about OSS backup is correct?

Question18: A company uses Alibaba Cloud SLB and Auto Scaling at the same time, hoping this combination can help save O&M cost and provide a stable and reliable system.
However, because they do not have relevant experience, the company's engineers listed some precautions based on their understanding, and turned the list to you for advice.
As an expert of Alibaba Cloud, you tell them only is correct.

Question19: Your website has high volume of traffic and sudden spikes for a very short time. In this scenario,
______________ can manage traffic peak efficiently and maintain a consistent user experience.

Question20: Using a cloud computing service is simple and straightforward. One can choose the instance with desired specification, finish payment and then use it right away. Moreover, the underlying physical machines are managed by cloud service providers and transparent to users.

Question21: You can create a custom image for ECS using which of the followings? (Choose two.)

Question22: Your friend purchases some Alibaba Cloud resources and uses them to build an online training website. Before the site goes online, your friend wants to perform some performance tests but doesn't know how to do it. In this case, which of the following services can help?

Question23: Which of the following statements about file uploading to OSS strategy is not correct?

Question24: Server Load Balancer can manage sudden spikes in traffic, minimize response time and maintain 99.99% availability of your web application.

Question25: You are developing a highly available web application using stateless web servers. Which services are suitable for the application? (Choose three.)

Question26: Your friend purchases some Alibaba Cloud resources and uses them to build an online training website. Before the site goes online, your friend wants to perform some performance tests but doesn't know how to do it. In this case, which of the following services can help?

Question27: 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 statement about OSS backup is correct?

Question28: A company wants to migrate its system to public cloud platform and they choose Alibaba Cloud. The migration process is very important and they want to ensure that everything works right. Which of the following services can the company choose?

Question29: Cloud disks are reliable because they use __________ to provide block-level data storage for ECS instances, ensuring 99.9999999% data reliability.

Question30: You are developing a highly available web application using stateless web servers. Which services are suitable for the application? (Choose three.)

Question31: 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?

Question32: Company A builds a sales management platform based on Alibaba Cloud services, using 3 ECS instances. One of the ECS instance has MySQL installed as the database server of the platform, the other two are used as WEB servers. After some time, due to the rapid increase of employees and sales analysis requests, the performance of the platform is challenged in terms of response time. Through CloudMonitor, it is found that the average CPU usage reaches 70% for the two WEB server ECS instances and the database load reaches
75% for the database server ECS instance. In this situation, company A may choose which Alibaba Cloud services to improve the performance. (Choose two.)

Question33: A large shopping mall deploys a new video surveillance system. The five-floor building in which the mall is located 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 rapidly and the engineers find that 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.

Question34: 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 instances are left in the scaling group when the scheduled task is activated once?

Question35: Alibaba Cloud Monitor service stems from years of experience of server monitoring technology in Alibaba group, leveraging the powerful data analysis capability of Alibaba cloud computing platform to provide monitoring service for various clients' applications and servers. A user receives an alert saying that the IOPS utilization rate for an ECS instance exceeds 80%. Yet, he/she is not sure how to handle the situation, the user may obtain help from Alibaba Cloud through the below methods? (Choose three.)

Question36: When we talk about the 'Elastic' feature for ECS product, we are not talking about .

Question37: Auto Scaling is a management service that can automatically adjust elastic computing resources based on your business needs and policies. It supports adding existing ECS instances into the scaling group, whose status however must be .

Question38: Which of the following statements is true for RDS?

Question39: When using Alibaba Cloud OSS, you can set access control in 3 different levels, which are (Choose three.)

Question40: Your website has high volume of traffic and sudden spikes for a very short time. In this scenario, can manage traffic peak efficiently and maintain a consistent user experience.

Question41: Your website has oscillating traffic peaks that are difficult to predict in advance. In this scenario, it is recommended to use SLB and together with ECS.

Question42: Company builds a music download website based on OSS and ECS, and users can download mp3 files after registering for the website. Recently, the public network traffic to the OSS has doubled but the increase of registered users is less than 10%. After in-depth analysis, engineers find that many user download requests are raised from search engine but not the website itself. In this case, which of the following measures is thought to be able to address this issue.

Question43: Alibaba Cloud CDN can directly accelerate the access to the files stored in OSS and reduce OSS traffic costs.

Question44: As a cloud computing service provider, Alibaba Cloud provides security services including. (Choose two.)

Question45: ECS is a highly flexible service. It can be used independently as a simple web server, or used with other Alibaba Cloud products, such as OSS and CDN, to provide advanced solutions. ECS can be used in applications such as:. (Choose four.)

Question46: A large shopping mall deploys a new video surveillance system. The five-floor building in which the mall is located 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 rapidly and the engineers find that 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.

Question47: SQL injection is a common application layer attack, usually through building special input parameters and pass it to web applications to steal or sabotage the application dat a. Which of the following is the target for SQL injection?

Question48: 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?

Question49: Which method is not supported by OSS to create a bucket?

Question50: Cloud disks are reliable because they use to provide block-level data storage for ECS instances, ensuring 99.9999999% data reliability.

Question51: Auto Scaling is a management service that can automatically adjust elastic computing resources based on your business needs and policies. Which of the following application scenarios are suitable for Auto Scaling? (Choose three.)

Question52: Company A builds a sales management platform based on Alibaba Cloud services, using 3 ECS instances.
One of the ECS instance has MySQL installed as the database server of the platform, the other two are used as WEB servers. After some time, due to the rapid increase of employees and sales analysis requests, the performance of the platform is challenged in terms of response time. Through CloudMonitor, it is found that the average CPU usage reaches 70% for the two WEB server ECS instances and the database load reaches 75% for the database server ECS instance. In this situation, company A may choose which Alibaba Cloud services to improve the performance _________________. (Choose two.)

Question53: You can create a custom image for ECS using which of the followings? (Choose two.)

Question54: Alibaba Cloud does not support Intranet communication between products that are not in the same region, which does not mean ______________?