Deck 1: ACA Cloud Computing Certification Exam

Question 1

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

A) ECS instances in different regions cannot communicate with each other on the intranet.
B) ECS instances and other products in different regions, such as ApsaraDB for RDS and OSS instances, cannot communicate with each other on the intranet.
C) Server Load Balancer cannot be deployed for ECS instances in various regions.
D) Server Load Balancer can be deployed for ECS instances in various regions.

Answer 1

B

Question 2

Which of the following scenarios is applicable to use RDS read-only instances?

A) Reduces the write pressure on the RDS primary instance.
B) Reduces the read pressure on the RDS primary instance.
C) Implements data backtracking for the last two days.
D) Improves RDS storage capabilities.

Answer 2

B

Question 3

What is the full name of ECS?

A) Elastic Compute Service
B) Elastic Computing Server
C) Elastic Cost Server
D) Elastic Communication Server

Answer 3

A

Question 4

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.

A) Server Load Balancer
B) Auto Scaling
C) RDS
D) VPC

Question 5

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

A) through OSS API/SDK
B) through ECS instance filesystem directory operation
C) through oss cmd tool
D) through cloud console

Question 6

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

A) Every user can create more than one bucket
B) Bucket name can be changed after creation
C) Every bucket should have a unique name
D) There is no limitation to objects number inside one bucket

Question 7

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.

Question 8

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

A) Server Load Balancer
B) RDS
C) Auto Scaling
D) OSS

Question 9

www.company.com is a newly launched social portal for exchanging automotive information. The portal is based on PHP, including 10GB of images, and some JavaScripts files. Currently one single ECS instance is used to host all the application content as well as a MySQL database. With the growing number of users, the portal is getting slower to load images or respond to user requests. Moreover, there will be additional 50GB image content uploaded to the portal every week. Which combination of Alibaba Cloud services below can help resolve the storage and performance issue at the same time?

A) OSS + CDN combination
B) OSS + MTS combination
C) OSS + RDS combination
D) OSS + ECS combination

Question 10

When using Alibaba Cloud SLB, you can set different weights for backend ECS instances. The higher the weight of a backend ECS instance, the more load will be assigned to it. If an SLB instance has 5 ECS instances in the backend server pool, all of which are healthy. Among these 5 ECS instances, the weight of ecs_inst1 is set to 100. Which of the following statements is correct?

A) We do not know the weight settings of the remaining 4 ECS instances, so we cannot tell what would happen.
B) 100% of loads will be assigned to ecs_inst1, and the rest 4 ECS instances will stay idle.
C) Based on SLB's working mechanism, approximately 20% of loads will be assigned to ecs_inst1.
D) Based on request level parameters of external requests, all requests with a request level parameter of 100 will be transferred to ecs_inst1.

Question 11

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

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 using put method to be able finish uploading in one http request.
C) If you are using OSS to store some log files which are continuously being updated, you better choose streaming method to be able to append to one existing object instead of overwriting.
D) If you need to upload very large file you better use multi-part uploading to get the capability of resuming from break point.

Question 12

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 data. Which of the following is the target for SQL injection?

A) Web application
B) Database
C) Confidential files on the server
D) Pictures on server

Question 13

If you are running an online ticket booking service with relatively fixed traffic, then which kind of charging mode is more suitable for you?

A) Pay-As-You-Go
B) Prepaid
C) Paypal-pay
D) bitcoin-pay

Question 14

___________________ is a ready-to-use service that seamlessly integrates with Elastic Compute Service (ECS) to manage varying traffic levels without manual intervention.

A) Server Load Balancer
B) OSS
C) RDS
D) VPC

Question 15

A company wants to use Alibaba Cloud service to replace their self-built database, which of the following services should it choose?

A) AsparaDB for RDS
B) Server Load Balancer (SLB)
C) Alibaba Cloud CDN (Content Delivery Network)
D) Deploy more ECS instances

Question 16

Server Load Balancer can help protect from ___________________ attack.

A) DDoS
B) Virus
C) Ransomware
D) SQL injection

Question 17

A/An _________________ is a copy of data on a disk at a certain point in time.

A) image
B) snapshot
C) template
D) EIP

Question 18

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

A) Elastic Computing
B) Elastic Storage
C) Elastic Network
D) Elastic Administration

Question 19

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.

A) RDS
B) Auto Scaling
C) VPC
D) MaxCompute

Question 20

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.

A) Container Service
B) ECS
C) OSS
D) CDN

Question 21

Which of the following is not the database type supported by RDS?

A) MySQL
B) SQL Server
C) Postgre SQL
D) Oracle database

Question 22

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?

A) Event Management Service
B) Aftersales Support
C) Alibaba Cloud Architecture Design Training
D) Alibaba Cloud Product Operation Training

Question 23

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.)

A) Check ECS or CloudMonitor product documents.
B) Open a ticket to Alibaba Cloud help desk.
C) Look for answers in Alibaba Cloud forum.
D) You cannot obtain any help from Alibaba Cloud.

Question 24

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?

A) One
B) Six
C) Zero
D) Five

Question 25

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

A) Data disk snapshot
B) CPU snapshot
C) Memory snapshot
D) System disk snapshot

Question 26

Alibaba Cloud China Connect is a service that can help international companies do business in China. Which of the following services is not included in China Connect?

A) Web hosting
B) ICP Support
C) Office registration support
D) Connect your service with Alibaba Group ecosystem

Question 27

Which 2 OSS object types can be configured as parameter for object lifecycle management? (Choose two.)

A) Infrequent access
B) Snapshot
C) Archive
D) Chunk

Question 28

Which three of the following statements about domain name binding to your OSS bucket are correct? (Choose three.)

A) Your customized domain name will be audited by Alibaba Cloud
B) your customized domain name need to be put on record in MIIT (Ministry of Industry and Information Technology)
C) the number of domain names you bind to one bucket can't exceed 20
D) mapping a domain name to your bucket endpoint is mandatory

Question 29

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?

A) Anti-DDoS Service Basic
B) Managed Security Service
C) Situation Awareness
D) Anti-DDoS Service Pro

Question 30

You built an online shop using Alibaba Cloud services (ECS, RDS, …etc.) and very soon you'll have a campaign that every customer that invites 3 friends will get a 50% off coupon. To avoid HTTP flood attacks and ensure only genuine customers (not bots) joining the event, which security product should you choose?

A) Anti-DDoS Basic
B) Anti-DDoS pro
C) WAF
D) Server Guard

Question 31

Server Load Balancer supports protocols like ______________. (Choose four.)

A) HTTP
B) HTTPS
C) TCP
D) UDP
E) MPLS
F) MQTT

Question 32

Anti-DDoS is one of the major features in Alibaba Cloud Security Service. Many websites have experienced different types of DDoS attacks, an accurate understanding of DDoS is crucial to protecting websites. Which of the following descriptions about DDoS attack is the most accurate one?

A) The main target for DDoS attack is the database.
B) DDoS attack will try to crack the password through a large number of attempts.
C) The main purpose of DDoS attack is to make the target server unable to provide service normally, which is one of the network attacks that are most difficult to defend.
D) The purpose of DDoS attack is to steal confidential information.

Question 33

Alibaba Cloud relational database service (RDS) is a stable, reliable and elastic online database service. RDS supports below database types _______________? (Choose three.)

A) MySQL
B) SQL Server
C) PostgreSQL
D) Oracle database

Question 34

Auto Scaling is a management service that can automatically adjust elastic computing resources based on your business needs and policies. It supports adding an existing ECS instance into the scaling group but imposes certain requirements on instance region. In this case, which of the following statements is true?

A) The instance and the scaling group must be in the same region but not necessarily the same zone.
B) The instance and the scaling group must be in the same region and zone.
C) The instance and the scaling group can be in different regions and zones.
D) Each scaling group can span up to two regions. After adding the ECS instance, the number of regions of all the ECS instances in the scaling group must be no greater than two.

Question 35

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

A) RDS features a high availability of 99.95% while self-built database requires you to implement data protection, primary-standby replication, and RAID all by yourself.
B) RDS provides automatic backup while self-built database requires you to prepare storage space for backup copies and regularly verify that these copies can be restored.
C) Self-built database supports quick deployment and elastic scaling.
D) RDS requires no O&M while self-built database requires a dedicated DBA for maintenance, which results in high HR cost.

Question 36

You are developing a highly available web application using stateless web servers. Which services are suitable for storing session state data? (Choose two.)

A) RDS
B) Table Store
C) MaxCompute
D) OSS

Question 37

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?

A) Eight
B) Ten
C) Six
D) Five

Question 38

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.)

A) You need to flexibly adjust elastic computing resources based on your business needs, and ECS instances will be added seamlessly to address traffic peaks and surges.
B) You need to flexibly adjust elastic computing resources based on your business needs, and ECS instances will be reduced automatically to save costs when business needs drop.
C) When an ECS instance reacts abnormally in a scaling group, Auto Scaling will create a new ECS instance to take over the computing tasks conducted by the faulty instance.
D) You want to flexibly adjust elastic computing resources based on your business needs, and ECS instances will be automatically upgraded (with more Memory, more powerful CPU) when needed.

Question 39

Auto Scaling is a management service that can automatically adjust elastic computing resources based on your business needs and policies. Which of the following is not the feature supported by Alibaba Cloud Auto Scaling?

A) Elastic Scale-Out
B) Elastic Scale-In
C) Elastic Self-Health
D) Elastic Self-Diagnostic

Question 40

You can __________________ an ECS instance's configuration. (Choose two.)

A) upgraded
B) downgraded
C) downloaded
D) uploaded

Question 41

Alibaba Cloud's object storage (Object Storage Service, OSS for short) can be used to store massive amount of files, but there is still a maximum number of files in a single bucket.

Question 42

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.

A) SLB instances must have Health Check enabled, or they cannot be used together with Auto Scaling
B) All ECS instances under the same SLB instance must be running on the same operating system
C) All backend servers under the same SLB instance must be in the same Scaling Group
D) All backend servers under the same SLB instance must have the same configuration

Question 43

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

Question 44

Some applications may encounter large traffic fluctuations within a short period. When ECS is used with _______, the number of ECS instances is automatically adjusted based on traffic.

A) Server Load Balancer
B) RDS
C) Auto Scaling
D) OSS

Question 45

Company В 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.

A) Migrates music files from the OSS to the data disks for ECS instances.
B) Changes the website access mode to HTTPS.
C) Limits access sources by configuring "Anti-leech settings" of OSS bucket attributes.
D) Introduce SLB for extra protection.

Question 46

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

A) a distributed file management system with 3 redundant copies
B) a file system
C) a double copy distributed system
D) a Linux file system

Question 47

Auto Scaling can automatically remove unhealthy ECS instances from the scaling group (this feature is called Elastic Self-Health). Yet, after removal, the user has to manually add equivalent amount of new ECS instances back to the scaling group.

Question 48

Server Load Balancer supports health checks for ECS instances and allows user to specify the frequency. If an ECS instance does not qualify the health check, traffic will not be forwarded to that instance, thereby ensuring application availability.

Question 49

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

Question 50

Which of the following statements is true for RDS?

A) Multiple databases can be created in one RDS instance.
B) Databases with the same name are allowed in the same instance.
C) Resources are not shared among the databases in the same RDS instance.
D) None of the above is true.

Question 51

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.

Question 52

___________ feature in Server Load Balancer means that it can forward the access requests from a single user to the same ECS instance within a certain period to ensure session continuity.

A) session persistence
B) health check
C) Weighted Round Robin
D) least connections scheduling

Question 53

Which of the following ECS instance configurations can't be changed if we don't change instance type?

A) Mem size
B) System disk size
C) Data disk size
D) Number of data disk

Question 54

Alibaba Cloud Object Storage Service (OSS) is a massive, highly available, secured and cost effective storage service. OSS is superior than self-built storage in all these aspects. Which of the following advantage relates to the high availability of OSS?

A) Availability actually relies on the underlying hardware, which can break down easily. Once the hard disk malfunctions, it can also lead to permanent data loss.
B) Data Reliability is not less than 99.99999999%. Data is backed up automatically with multiple redundant copies.
C) Data has to be backed up by customer manually, which is time-consuming and labor-intensive.
D) The following features are available: Multiple Authentication and Authorization mechanism, Whitelist, Anti-leech URL, and Master-Sub Account

Question 55

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.)

A) Use content delivery network, CDN, to accelerate the caching of the platform's css, JavaScript files etc.
B) By adding a SLB instance and increase the number of ECS instances to reduce the work load on current ECS instances.
C) Use RDS to replace existing self-built database, in order to obtain better database performance; also creating RDS read-only instances to handle read-only requests, hence reduce the work load on master RDS instance.
D) Import data into OSS to share the storage load of the platform.

Question 56

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?

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.

Question 57

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.

Question 58

ECS can be used along with ______ to store static images, videos, and reducing storage fees.

A) OSS
B) Server Load Balancer
C) RDS
D) VPC

Question 59

In mainland China, the approval requirements for business record filing vary depending on provincial communication management bureaus.

Question 60

You can retrieve data directly from an ECS Image and use it right away.

Question 61

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 _________.

A) Running
B) Created
C) Stopped
D) Preparing

Question 62

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

A) snapshot duplicate
B) snapshot rollback
C) snapshot download
D) snapshot deletion

Question 63

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

A) Security operation for underlying hardware of cloud computing.
B) Application maintenance in ECS instances.
C) Security isolation between cloud computing tenants.
D) IP white list setting for RDS.

Question 64

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?

A) CloudMonitor
B) Server Guard
C) Anti-DDoS Basic Service
D) Situation Awareness

Question 65

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?

A) Configure Auto Scaling appropriately to automatically add or reduce ECS instances.
B) Manually create 30 ECS instances using the custom image, and then add them to SLB every night before 20:00 and remove them after 02:00.
C) Create 30 ECS instances based on the custom image and add them to SLB. Then, configure weights for these ECS instances to respond to user requests every night from 20:00 to 02:00, and reset those weights to zero for other periods of time.
D) Configure Auto Scaling appropriately to automatically upgrade/downgrade the ECS instances.

Question 66

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

A) Bucket level
B) Object level
C) RAM account level
D) Directory level

Question 67

In which of the following cases would you need to apply an ICP license? (Choose three.)

A) Accelerate your Overseas Website in China
B) Launch your website in China
C) Launch your online shop in China
D) Open your office in China

Question 68

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.)

A) Official corporate websites
B) large-traffic apps
C) Databases
D) simple web applications
E) no limited online storage

Question 69

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.)

A) Private-read
B) Public-read-write
C) Public-read
D) Private

Question 70

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

A) RDS
B) SLB
C) ECS
D) MaxCompute
E) OSS

Question 71

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.

Question 72

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?

A) After-Sales Support Service
B) Support Ticket Service
C) Load and Performance Testing Service
D) None Of The Above