EMT Practice Test

1. Question Content...

---

Question1: The Alibaba Cloud CDN can directly accelerate access to the files stored in OSS and reduce OSS traffic costs.

Question2: A large enterprise wants to migrate the entire business system to Alibaba Cloud to save the overall IT procurement and O&M costs From the security aspect, the company requires that
1. Must support secured remote O&M because the administrator often takes business trips.
2. Networks between subsystems should be isolated because subsystems are independently used by different departments Which of the followings should be used together to meet the company's requirements? (Number of correct answers: 3)

Question3: A customer uses Alibaba Cloud Auto Scaling service and creates a scaling group He/she sets the "Minimum number of instances" to 2 and "Maximum number of instances" to 7.
After correctly configuring scaling settings, the customer adds a scaling rule "Add 6 ECS instances", and creates a scheduled task based on this rule.
And then, the customer checks the scaling group and see it already contains 3 valid ECS instances, he/she then enables this scaling group immediately.
How many ECS instance will be added in the scaling group when the scheduled task is activated once'?

Question4: 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)

Question5: Alibaba Cloud Content Delivery Network (CDN) is a distributed network built on top of a base network with edge node server clusters distributed across various regions. If a user finds that the CDN cache hit rate is low, the possible reasons are ____________. (Choose three.)

Question6: By using ApsaraDB for RDS to implement read/write splitting, which of the following can be achieved?
(Number of correct answers 2)

Question7: You deployed a website on an Alibaba Cloud Elastic Compute Service (ECS) instance. After some time, you are concerned that the ECS instance might be compromised by brute-force password cracking. To address this issue, you can use Alibaba Cloud's ________________ product.

Question8: An enterprise uses a public cloud service to lease several virtual machines and places these virtual machines in an isolated virtual network. They have full control over their virtual network, including choosing their IP address range, specifying the CIDR block, configuring the routing table, and gateway, etc.
In Alibaba Cloud, the _____________ can work as described above.

Question9: Alibaba Cloud Content Delivery Network (CDN) performs content acceleration with the support of intelligent DNS resolution The following function_________is NOT included in intelligent DNS resolution.

Question10: When creating an Alibaba Cloud VPC, you must specify Intranet network segments used in the VPC with a CIDR Block. This CIDR Block can later be modified after the VPC is created.

Question11: A new media company uses a mobile app to provide news and information services. They utilize Auto Scaling to add/reduce ECS instances dynamically to address service traffic spikes.
Based on the estimation of their service and technical personnel the company thinks they require 10 ECS instances during idle hours and 10 to 20 ECS instances (dynamically adjusted) during some busy hours, which are normally from 07:30 to 09:00 and from 18:30 to 20:00 In the scaling group; they set the "Minimum number of instances" to 10 and "Maximum number of instances" to 20.
To simplify deployment tasks and save costs, which of the following scaling modes should they choose?

Question12: Compared with traditional physical servers, upgrading an ECS instance is much easier. Which of the following statements about upgrading an ECS instance is false?

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: User A is the system administrator of a company who frequently travels 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?

Question15: Many cloud computing service providers support users to activate/create a cloud service through Open API.
Which of the following protocols is most not likely to be supported by these Open API?

Question16: When using Alibaba Cloud SLB, users can enable the Health Check function. Layer-4 SLBs (TCP protocol) determine the availability of ECS instances through _________________.

Question17: 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?

Question18: You are designing a solution for a startup company, the proposed solution is like this You suggest they use ECS instances to process requests from mobile App clients, and use SLB to distribute data traffic and ensure the load across each backend ECS instance is balanced.
Moreover to deal with volatile fluctuations in business volume (page views are much higher on the weekends), you also suggest they use Auto Scaling to dynamically increase or reduce computing resources.
The company is satisfied with the solution you proposed. However, they have one concern that when removing an idle instance from the scaling group: if Auto Scaling shuts the instance down directly, the service running on that instance will be abruptly terminated, resulting in poor user experience.
In order to eliminate your customer's concern, which of the following solutions should you recommend them?

Question19: When using ECS, you don't have to stop the ECS instance before resizing the system disk.

Question20: If you want to build a secure and isolated network environment on Alibaba Cloud; meanwhile, design your network topology and specify Intranet IP addresses or CIDR Blocks in this network environment as needed, you can choose

Question21: Cloud Disk is a block storage product provided by Alibaba Cloud (especially for ECS). It features low latency and high reliability. Which of the following statements is true for Cloud Disk?

Question22: Alibaba Cloud OSS is a cloud storage service that features massive capacity, outstanding security, low cost, and high reliability. For a website consisting of static pages, they can use OSS to host these static pages.
Meanwhile, using OSS in conjunction with ___________ product for acceleration purposes.

Question23: Distributed computing breaks down a task into many small parts, then assigns these parts to multiple computing nodes, and eventually puts these computing results together to form the final outcome.

Question24: Alibaba Cloud ECS is a simple and efficient computing service. ECS helps you quickly deploy applications, improve your O&M efficiency, and reduce IT costs. ECS belongs to this type of service _____________.

Question25: 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.

Question26: Alibaba Cloud Object Storage is suitable for storing unstructured data such as pictures and videos.

Question27: Which of the following statements is NOT correct, when comparing RDS with a self-built database?

Question28: You deployed a MySQL database on an Alibaba Cloud Elastic Compute Service (ECS) instance. Due to increased traffic, you want to improve performance by splitting read/write requests. Therefore, you can use Alibaba Cloud ___________ to solve this issue.

Question29: Company G developed a shopping App. The system is built using Alibaba Cloud products, including ECS instances and OSS in the North China 1 region, where static web pages and images are stored on OSS.
After the App went online, the access speed in mainland China was acceptable. Recently, the company decided to expand to the U.S. market and requires acceptable access speeds for U.S. users.
To address this requirement, Company G should select Alibaba Cloud _______________ service.

Question30: In some cases, you can purchase Elastic Compute Service (ECS) instances in Pay-As-You-Go mode to meet the demands for requiring additional computing resources in a particular period of time and set an auto-release time to release these Pay-As-You-Go instances later. ___________________ is a correct description of this operation.

Question31: In Alibaba Cloud Object Storage, users want to use graphical tools to upload and download object files.
Which tools can they use?

Question32: If users use Alibaba Cloud Anti-DDoS Basic service, when the attack traffic exceeds the service upper limit, the black hole policy will then be triggered; after that, the users' servers can still provide services at a limited speed.

Question33: Before data communication is setup, the security groups match the security group rules one by one to query whether to allow access requests Assume that the user has created two security group rules 1 and 2 The protocol type, port range, authorization type, and authorization object of the two security group rules are the same. The difference is that Rule 1 is a denial policy, rule 2 is an allowed policy, so the following statement is correct_______ (Number of correct answers 2)

Question34: As a technical employee at a startup company, you deploy static files such as images and videos on the same ECS instance to provide services. After some time, due to business growth, you find that these static files are using too much ECS disk space. To quickly address this issue, you should choose Alibaba Cloud
_________________.

Question35: Alibaba Cloud OSS is a cloud storage service that features massive capacity, outstanding security, low costs, and high reliability. When talking about information security, the advantages of using OSS are
____________. (Choose two.)

Question36: Once ECS is created, you can't change its private IP address anymore.

Question37: You would like to deploy your applications on Alibaba Cloud to meet requirements including cost reduction, improving service availability, fast deployment- and redundant backup Alibaba Cloud_________products can help meet these requirements (Number of correct answers 3)

Question38: Alibaba Cloud Object Storage Service (OSS) is a cloud storage service that features massive capacity, outstanding security, low costs, and high reliability. In an OSS bucket, all elements are stored as________.

Question39: Recently, response speed of a certain Alibaba Cloud Elastic Compute Service (ECS) instance is unacceptably slow. By using CloudMonitor we discovered that the ECS instance utilizes more than 80% of the assigned bandwidth.
Which of the following approach can address this issue and without the need to reboot the ECS instance?

Question40: The difference between public and private Server Load Balancers (SLBs) is that private SLBs connect to their backend ECS instances using the private network (Intranet) while public SLBs connect to their backend ECS instances using the public network (Internet).

Question41: Alibaba Cloud Server Guard provides brute-force password cracking protection. Therefore, users who have activated Server Guard neither need to modify the administrator password of their ECS instances periodically nor need to set a complicated password.

Question42: After creating Alibaba Cloud Elastic Compute Service (ECS) instances, Alibaba Cloud will provide free basic security services to help defend against attacks, including ________________. (Choose four.)

Question43: Alibaba Cloud SLB can distribute user requests to backend ECS instances. These ECS instances must have the same specification (CPU, Memory)

Question44: All versions of Alibaba Cloud RDS use master-slave mode to ensure high availability. When the master database fails, RDS will switch to the standby database within 30 seconds.

Question45: Company F launched a new App and put the installation package (size: 6 MB) on its official website (hosted on Elastic Compute Service (ECS)). Initially, the download speed was acceptable. However, due to an advertising event on CCTV last week, the number of installation package downloads drastically increased, resulting in poor user experience and a significant increase in ECS bandwidth cost.
Company F can select Alibaba Cloud ______________ service to solve download speed and bandwidth cost problems at the same time.

Question46: Which of the following statements is most accurate about the Data Transmission Service (DTS) database migration function?

Question47: After activating an SLB, it will be assigned an IP address. The SLB will keep this IP address until it is released.

Question48: Which of the following methods can be used to connect with the database in RDS for MySQL? (Choose three.)

Question49: A challenging thing in the gaming industry is the unpredictable and fluctuating business traffic. For example,
1 ECS instance is enough to meet all business demands today; however, we may need 10 ECS instances tomorrow.
In this situation, it is difficult to predict the number of ECS instances required. If we use too few ECS instances, we may not be able to cope with business peaks; whereas if we use too many ECS instances, we may introduce unnecessary costs.
On Alibaba Cloud, _______________ is the best product portfolio to cope with the gaming scenario described above.

Question50: Using Alibaba Cloud ECS, SLB, and Auto Scaling in combination, you can build a stable, efficient, and secure system at a low cost. This system can distribute loads based on predefined policies and automatically scale resources with changing business volume. Which of the following statements is correct?

Question51: Alibaba Cloud will check source IP addresses that connect to ApsaraDB for RDS through the public internet.
When Alibaba Cloud Situation Awareness detects an alert reporting "a seldom-used IP address connecting to the database," which of the following is the safest way to handle this alert?

Question52: An insurance company has more than 200,000 online orders per day on their platform. Over the past 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 attack and ensure service availability?

Question53: After activating an Alibaba Cloud Elastic Compute Service (ECS) instance, you want to monitor the status of the ECS instance via Alibaba Cloud console. Therefore: you must activate and purchase Alibaba Cloud CloudMonitor service to meet this demand.

Question54: A customer uses Alibaba Cloud Auto Scaling service and creates a scaling group. They set the "Minimum number of instances" to 6 and the "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. Then, the customer checks the scaling group and sees it already contains 6 valid ECS instances.
They then enable this scaling group immediately. How many ECS instances will be in the scaling group when the scheduled task is activated once?

Question55: The RDS master instance and read-only instance can be in different regions.

Question56: When adopting cloud computing and taking advantage of its convenience, you will also face challenges in information security.
Using cloud computing does not increase security risks, but your active engagement is still a must. Which of the following is not included in the security principles recommended by Alibaba Cloud?

Question57: When creating an ECS instance in your Alibaba Cloud VPC, you must specify a VSwitch for that instance at the same time. Otherwise, you will not be able to create this ECS instance.

Question58: When creating cloud product instances in Alibaba Cloud, you can choose the default VPC and VSwitch. The difference between non-default VPC/VSwitch and default VPC/VSwitch is that default VPC and VSwitch can only be created by Alibaba Cloud. Which of the following statements is incorrect about default VSwitch?

Question59: Alibaba Cloud OSS is a cloud storage service that features massive capacity, outstanding security, low cost, and high reliability. No traffic charges are applied when files are uploaded to OSS via the management console or using Open API.

Question60: 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)

Question61: 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)

Question62: A popular worldwide forum stores static resources in OSS and accelerates access using CON Users find that the speed of downloading files from the forum has been greatly improved, but uploading files is slow due to the long data transmission distance, resulting in a bad access experience In order to improve the speed of uploading files for users in this forum, so that users in different regions can have a good access experience, we recommend that the forum can________.

Question63: Alibaba Cloud Object Storage Service (OSS) provides multiple file uploading modes for different scenarios, which are___________.
(Number of correct answers: 2)

Question64: In Auto Scaling, a scaling group refers to the collection of ECS instances deployed with the same applications, where these ECS instances can be charged by monthly subscription or Pay-As-You-Go. For scenarios with abrupt service traffic change, Pay-As-You-Go ECS instances can meet service requirements while minimizing cost. For monthly subscription ECS instances, you can manually add the idle instances to the scaling group to take full advantage of idle resources.

Question65: If an administrator often needs to manage multiple ECS instances in an Alibaba Cloud VPC through the Internet Which of the following solutions can meet this need at low costs and without affecting system security.

Question66: 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.

Question67: SLB is a load balancing service that distributes traffic to multiple cloud servers It provides a wide range of functions to meet the needs of various business scenarios If a user wants to use SLB and ECS instances to deploy two-way authenticated HTTPS websites, the following statement is correct_______.

Question68: RDS accounts can be used to connect with the databases created on a given RDS instance. Each account can be bound with multiple databases. Yet, the read/write permissions of each database can only be assigned to one RDS account

Question69: The effect of CDN is highly related to the scenario in which it is used. _______________________ is not an applicable scenario to use CDN.

Question70: When using the Open API in ECS, you have to send out HTTP GET requests and append corresponding request parameters according to the API description.

Question71: OSS supports deleting buckets. Before deleting a bucket, you must delete all the files in the bucket, including incomplete upload segments.

Question72: When forwarding layer 7 service requests using Alibaba Cloud SLB, if you have two domain names under a certain VIP, which are respectively vip.a.com and img.a.com. Now you want to activate session persistence for vip.a.com, but not for img.a.com.
To achieve this, you can select "Rewrite Cookie" mode when enabling session persistence on the console.
In this mode, you can set the cookie name in the response. Server Load Balancer will overwrite the original cookie when it discovers that a new cookie is set. The next time the client carries the new cookie to access the Server Load Balancer, the listener will distribute the request to the previously recorded backend server.

Question73: A startup video streaming company deploys its service on Alibaba Cloud Elastic Compute Service (ECS) Christmas is coming soon and the CEO knows that they need to prepare more computing resources However, they don't want to purchase a large number of Elastic Compute Service (ECS) instances tor a long period of time. Instead, they want to buy ECS instances for a short period of time and release them after the event is over. Which of the following billing methods of ECS is the most suitable?

Question74: Auto Scaling often works in conjunction with SLB, where scaling groups and SLB must be in the same region.

Question75: A company launched its online service just a year ago. It uses five ECS instances and does not have a full- time system administrator Over the last six months, the company's system has encountered various security problems Several high-risk vulnerabilities were exploited by hackers, leading to leakage of the company's confidential data. Which of the following Alibaba Cloud products can be used to quickly resolve this problem?

Question76: 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 _____________. (Choose two.)

Question77: When a customer uses Alibaba Cloud Object Storage Service (OSS) service and finds there exist an amount of Internet downstream traffic, he/she can use Alibaba Cloud Content Delivery Network (CDN) service to reduce the traffic cost.
Because the Internet traffic cost of CDN is lower than that of OSS, moreover, the back-to-source traffic cost from CDN to OSS is also lower than a user access to OSS directly.

Question78: 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.