ACA-Cloud1 Questions PDF [2024] Use Valid New dump to Clear Exam
Passing Alibaba Cloud ACA-Cloud1 Exam Using 2024 Practice Tests
Alibaba Cloud ACA-Cloud1 (ACA Cloud Computing Associate) Certification Exam is designed to validate the knowledge and skills of individuals who want to become certified cloud computing professionals. ACA Cloud Computing Associate certification exam is intended for beginners who have a basic understanding of cloud computing and want to develop their skills in this field. The ACA-Cloud1 exam covers various cloud computing topics, including cloud computing concepts, Alibaba Cloud products, cloud security, and basic network knowledge.
NEW QUESTION # 25
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. Based on SLB's working mechanism, approximately 20% of loads will be assigned to ecs_inst1.
- B. We do not know the weight settings of the remaining 4 ECS instances, so we cannot tell what would happen.
- C. 100% of loads will be assigned to ecs_inst1, and the rest 4 ECS instances will stay idle.
- D. Based on request level parameters of external requests, all requests with a request level parameter of 100 will be transferred to ecs_inst1.
Answer: B
Explanation:
Explanation
Alibaba Cloud Server Load Balancer (SLB) is a service that distributes network traffic across multiple ECS instances to improve the service capabilities of applications. SLB supports different load balancing algorithms, such as round robin, weighted round robin, and least connections. When using the weighted round robin algorithm, SLB assigns different weights to backend ECS instances based on their processing capabilities. The higher the weight of a backend ECS instance, the more requests it will receive from SLB. However, the weight of a backend ECS instance is not the only factor that determines the load distribution. The number and the weight of other backend ECS instances in the same server group also affect the load balancing result.
Therefore, without knowing the weight settings of the remaining 4 ECS instances, we cannot tell what would happen to the load distribution among the 5 ECS instances. The other statements are incorrect because they assume a fixed or proportional load distribution based on the weight of ecs_inst1, which is not necessarily true.
References:
Alibaba Cloud Server Load Balancer
[ACA Cloud Computing Certification Exam Preparation Course]
Alibaba Cloud Computing Exam Question 2022
NEW QUESTION # 26
Server Load Balancer supports protocols like. (Choose four.)
- A. MPLS
- B. MQTT
- C. UDP
- D. HTTPS
- E. TCP
- F. HTTP
Answer: C,D,E,F
Explanation:
Explanation
Comprehensive protocol support - ICMP, TCP, UDP, HTTP, HTTPS,
NEW QUESTION # 27
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.
- A. TRUE
- B. FALSE
Answer: B
Explanation:
Explanation
According to the Alibaba Cloud Academy, Alibaba Cloud's object storage service (OSS) is a cloud storage service that enables you to store, backup, and archive any amount of data in the cloud. OSS is a cost-effective, highly secure, and highly reliable cloud storage solution. The capacity of each bucket is unlimited, and there is no limit on the number of files in a single bucket. Therefore, the statement is false. References: What is OSS? - Alibaba Object Storage Service Course - Cloud Academy, Object Storage Service(OSS): Store Data Safely In The Cloud - Alibaba Cloud Blog
NEW QUESTION # 28
Which of the following statements is true for RDS?
- A. Multiple databases can be created in one RDS instance.
- B. None of the above is true.
- C. Databases with the same name are allowed in the same instance.
- D. Resources are not shared among the databases in the same RDS instance.
Answer: A
Explanation:
Explanation/Reference: https://www.alibabacloud.com/help/doc-detail/26092.htm
NEW QUESTION # 29
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 can be in different regions and zones.
- B. The instance and the scaling group must be in the same region and zone.
- C. The instance and the scaling group must be in the same region but not necessarily the same zone.
- 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.
Answer: B
NEW QUESTION # 30
Which of the followings are not the operations that you can do on a cloud disk snapshot? (Choose two.)
- A. snapshot duplicate
- B. snapshot download
- C. snapshot deletion
- D. snapshot rollback
Answer: A,B
Explanation:
Explanation/Reference: https://www.alibabacloud.com/help/doc-detail/52045.htm#section-1ff-9s6-3i5
NEW QUESTION # 31
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. Server Guard
- B. CloudMonitor
- C. Situation Awareness
- D. Anti-DDoS Basic Service
Answer: A
Explanation:
Explanation/Reference: https://www.alibabacloud.com/blog/blogblogalibaba-cloud-server-guard-a-comprehensive- assessment_284390
NEW QUESTION # 32
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. no limited online storage
- B. simple web applications
- C. Databases
- D. Official corporate websites
- E. large-traffic apps
Answer: B,C,D,E
Explanation:
Explanation/Reference:
NEW QUESTION # 33
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.
- A. TRUE
- B. FALSE
Answer: B
NEW QUESTION # 34
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.
- A. TRUE
- B. FALSE
Answer: B
Explanation:
Explanation
NEW QUESTION # 35
Alibaba Cloud CDN can directly accelerate the access to the files stored in OSS and reduce OSS traffic costs.
- A. FALSE
- B. TRUE
Answer: B
NEW QUESTION # 36
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. Server Guard
- B. CloudMonitor
- C. Situation Awareness
- D. Anti-DDoS Basic Service
Answer: A
Explanation:
Explanation
Server Guard is a cloud-based security service that provides real-time protection for servers against intrusion events, such as brute force password cracking. Server Guard consists of a lightweight agent that is installed on the server and a cloud protection center that analyzes and responds to security threats. Server Guard can help the administrator to reduce the possibility of brute force password cracking by providing the following features1:
Password cracking protection: Server Guard can detect and block password cracking attempts on servers, such as SSH brute force attacks on Linux servers and RDP brute force attacks on Windows servers. Server Guard can also alert the administrator of the attack source, time, and frequency, and provide suggestions for password strengthening.
Webshell detection and removal: Server Guard can scan and remove webshells that are maliciously implanted on servers by hackers. Webshells are scripts that allow hackers to remotely execute commands on servers, such as stealing data, uploading files, or launching attacks. Server Guard can identify and delete webshells based on signature matching, behavior analysis, and machine learning.
Anti-virus and anti-ransomware: Server Guard can detect and terminate various types of malware, such as ransomware, mining programs, backdoor programs, worms, and trojans. Server Guard can also prevent the encryption and deletion of files by ransomware, and restore the files to their original state.
Security baseline check: Server Guard can perform security baseline checks on servers to evaluate their security posture and compliance level. Server Guard can check more than 40 security items, such as system configuration, account management, network security, and log audit. Server Guard can also provide security hardening suggestions and one-click fixes for the detected issues.
Security situation awareness: Server Guard can provide a comprehensive and visualized view of the security situation of the servers, such as the number of attacks, the attack sources, the attack types, the attack trends, and the security score. Server Guard can also provide security reports and recommendations for improving the security level of the servers. References: Security Center
NEW QUESTION # 37
Multiple lower-configuration I/O-optimized ECS instances can be used withto deliver a high- availability architecture.
- A. Auto Scaling
- B. OSS
- C. Server Load Balancer
- D. RDS
Answer: C
Explanation:
Explanation
Server Load Balancer (SLB) is a service that distributes network traffic across multiple ECS instances to improve the service capabilities of applications. By using SLB, you can increase the availability and fault tolerance of your applications. You can also use SLB with Auto Scaling to dynamically adjust the number of ECS instances based on the traffic load. Multiple lower-configuration I/O-optimized ECS instances can be used with SLB to deliver a high-availability architecture that can handle traffic spikes and reduce costs.
References:
Alibaba Cloud Server Load Balancer
Alibaba Cloud Elastic Compute Service
ACA Cloud Computing Certification Exam Preparation Course
NEW QUESTION # 38
Multiple lower-configuration I/O-optimized ECS instances can be used withto deliver a high- availability architecture.
- A. Auto Scaling
- B. OSS
- C. Server Load Balancer
- D. RDS
Answer: C
NEW QUESTION # 39
Server Load Balancer supports protocols like. (Choose four.)
- A. MPLS
- B. MQTT
- C. UDP
- D. HTTPS
- E. TCP
- F. HTTP
Answer: C,D,E,F
Explanation:
Explanation
Alibaba Cloud Server Load Balancer (SLB) is a service that distributes network traffic across multiple ECS instances to improve the service capabilities of applications. SLB supports the following protocols for the listener configuration:
HTTP: Hypertext Transfer Protocol, a stateless application-layer protocol that is used to transfer web pages and other resources over the internet.
HTTPS: Hypertext Transfer Protocol Secure, an extension of HTTP that uses SSL/TLS encryption to provide secure communication between the client and the server.
TCP: Transmission Control Protocol, a reliable, connection-oriented transport-layer protocol that provides reliable data delivery and error recovery.
UDP: User Datagram Protocol, a connectionless transport-layer protocol that provides fast and efficient data transmission without guaranteeing reliability or order.
SLB does not support the following protocols:
MPLS: Multiprotocol Label Switching, a data-carrying technique that uses labels to forward packets across a network.
MQTT: Message Queuing Telemetry Transport, a lightweight publish/subscribe messaging protocol that is designed for constrained devices and low-bandwidth networks.
References:
Alibaba Cloud Server Load Balancer
ACA Cloud Computing Certification Exam Preparation Course
Alibaba Cloud Computing Exam Question 2022
Comprehensive protocol support - ICMP, TCP, UDP, HTTP, HTTPS,
NEW QUESTION # 40
Server Load Balancer can manage sudden spikes in traffic, minimize response time and maintain 99.99% availability of your web application.
- A. FALSE
- B. TRUE
Answer: B
Explanation:
Explanation
A is the correct answer because Server Load Balancer (SLB) can manage sudden spikes in traffic, minimize response time and maintain 99.99% availability of your web application. SLB distributes network traffic across groups of backend servers to improve the service capability and application availability. It includes Layer 4 Network Load Balancer (NLB), Layer 7 Application Load Balancer (ALB), and Classic Load Balancer (CLB). SLB provides high-performance load balancing services with super four-seven processing capabilities. SLB also provides disaster recovery at four levels for high availability and supports built-in Anti-DDoS services to ensure business security. SLB supports multiple protocols, such as TCP, UDP, HTTP, HTTPS, QUIC, and gRPC. SLB also supports cloud-native networks and is integrated with other cloud-native services, such as Container Service for Kubernetes (ACK), Serverless App Engine (SAE), and Kubernetes123 References: 1: SLB Overview 2: SLB Types & Pricing 3: What is ALB?
Manage sudden spikes in traffic, minimize response time and maintain 99.99% availability of your web application with Server Load Balancer.
NEW QUESTION # 41
Company B 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. Limits access sources by configuring "Anti-leech settings" of OSS bucket attributes.
- B. Introduce SLB for extra protection.
- C. Migrates music files from the OSS to the data disks for ECS instances.
- D. Changes the website access mode to HTTPS.
Answer: A
Explanation:
Reference:
http://static-aliyun-doc.oss-cn-hangzhou.aliyuncs.com/download/pdf/DNOSS11828897_en-US_intl_190202150837_public_b55986256a50380c526a35e863023ec9.pdf (55)
NEW QUESTION # 42
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. OSS
- B. CDN
- C. ECS
- D. Container Service
Answer: A
NEW QUESTION # 43
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. Server Guard
- B. CloudMonitor
- C. Situation Awareness
- D. Anti-DDoS Basic Service
Answer: A
NEW QUESTION # 44
Which of the following statements to OSS bucket is not correct?
- A. Every user can create more than one bucket
- B. There is no limitation to objects number inside one bucket
- C. Every bucket should have a unique name
- D. Bucket name can be changed after creation
Answer: D
Explanation:
Explanation
A bucket is a container for objects in Object Storage Service (OSS). Every user can create more than one bucket, but every bucket should have a unique name in OSS. There is no limitation to the number of objects inside one bucket. However, the bucket name cannot be changed after creation. You cannot customize, change, or request a namespace name change1. If you want to modify an object, you must upload a new object with the same name as the existing one to replace it2. References: 3: Create a bucket - Object Storage Service - Alibaba Cloud3 4: Manage objects in a versioning-enabled bucket - Object Storage Service - Alibaba Cloud4 1: Understanding Object Storage Namespaces - Oracle1 2: OSS Concepts - Alibaba Object Storage Service Course - Cloud Academy2
NEW QUESTION # 45
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. The following features are available: Multiple Authentication and Authorization mechanism, Whitelist, Anti- leech URL, and Master-Sub Account
- B. 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.
- C. Data Reliability is not less than 99.99999999%. Data is backed up automatically with multiple redundant copies.
- D. Data has to be backed up by customer manually, which is time-consuming and labor-intensive.
Answer: C
Explanation:
Explanation
According to the Alibaba Cloud Academy, 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.
One of the advantages of OSS is its high availability, which means that the data stored in OSS can be accessed anytime and anywhere with minimal downtime or interruption. OSS achieves high availability by ensuring data reliability of not less than 99.99999999%. Data reliability is the probability that the data stored in OSS is not lost or corrupted. OSS ensures data reliability by automatically backing up data with multiple redundant copies across different devices and facilities. Therefore, the option B is the correct answer that relates to the high availability of OSS. References: What is OSS? - Alibaba Object Storage Service Course - Cloud Academy, [Object Storage Service(OSS): Store Data Safely In The Cloud - Alibaba Cloud Blog]
NEW QUESTION # 46
In which of the following cases would you need to apply an ICP license? (Choose three.)
- A. Launch your online shop in China
- B. Open your office in China
- C. Accelerate your Overseas Website in China
- D. Launch your website in China
Answer: A,B,D
Explanation:
Reference:
https://www.alibabacloud.com/icp
NEW QUESTION # 47
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. VPC
- B. MaxCompute
- C. Auto Scaling
- D. RDS
Answer: C
NEW QUESTION # 48
You can create a custom image for ECS using which of the followings? (Choose two.)
- A. Memory snapshot
- B. Data disk snapshot
- C. CPU snapshot
- D. System disk snapshot
Answer: B,D
Explanation:
Explanation
You can create a custom image for ECS using data disk snapshots or system disk snapshots. A snapshot is a backup of the data on a disk at a specific point in time. You can use snapshots to create custom images, which are copies of the operating system and applications on a disk. You can use custom images to create ECS instances that have the same operating system, applications, and data as the original disk12.
You cannot create a custom image for ECS using CPU snapshots or memory snapshots. These are not valid terms in Alibaba Cloud. CPU and memory are not persistent storage devices, and they do not store the operating system and applications that are required for creating a custom image34. References: 1: Create a custom image from a snapshot - Alibaba Cloud1 2: What is a custom image? - Alibaba Cloud2 3: What is a CPU? - Alibaba Cloud3 4: What is memory? - Alibaba Cloud4
NEW QUESTION # 49
When we talk about the 'Elastic' feature for ECS product, we are not talking about _____________.
- A. Elastic Network
- B. Elastic Computing
- C. Elastic Storage
- D. Elastic Administration
Answer: D
Explanation:
Explanation/Reference:
NEW QUESTION # 50
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