Alibaba Cloud Certified Associate (ACA) Cloud Computing — Questions and Answers

Question 1: MaxCompute is a general purpose, fully managed, multi-tenancy data processing platform for large-scale data warehousing, and it is mainly used for storage and computing of batch structured data. Which of the following is not a use case for MaxCompute?

Date Warehouse (Correct answer)
Real-time Stream Processing
ETL (Extract, Transform, Load)
Data Analysis and Mining

Correct answer: Date Warehouse

Explanation: MaxCompute is primarily used for ETL (Extract, Transform, Load), data analysis and mining, and real-time stream processing tasks. While it can support data warehousing activities to some extent, it is not typically the primary use case for MaxCompute. Data warehousing solutions may involve other technologies or specialized platforms tailored specifically for data warehousing purposes.

Question 2: What is the primary objective of object storage service in Alibaba Cloud Certified Associate?

To ensure competence and proficiency in core object storage service concepts (Correct answer)
To replace practical experience entirely
To limit access to the profession
To generate revenue for testing organizations

Correct answer: To ensure competence and proficiency in core object storage service concepts

The primary objective of object storage service knowledge is to ensure practitioners have the competence and proficiency needed to perform effectively and safely in their professional roles.

Question 3: What is a best practice in Alibaba Cloud Certified Associate object storage service?

Any practice that is easy to implement
The cheapest available approach
A method or technique recognized as superior based on evidence and expert consensus (Correct answer)
A practice used only by large organizations

Correct answer: A method or technique recognized as superior based on evidence and expert consensus

Best practices are methods, techniques, or approaches that are recognized through evidence, research, and expert consensus as producing superior results and are recommended for adoption.

Question 4: What is the maximum number of AccessKey pairs a single RAM user can have active simultaneously?

10
5
1
2 (Correct answer)

Correct answer: 2

Each RAM user can have a maximum of 2 AccessKey pairs at the same time, allowing key rotation without service interruption.

Question 5: In Alibaba Cloud Certified Associate, what is sampling bias?

Randomly selecting participants from the entire population
Selecting a perfectly representative sample
A systematic error where some members of a population are more likely to be selected than others (Correct answer)
Using the largest possible sample size

Correct answer: A systematic error where some members of a population are more likely to be selected than others

Sampling bias occurs when the method of selecting participants systematically favors certain characteristics over others, resulting in a sample that does not accurately represent the target population.

Question 6: In Alibaba Cloud Certified Associate, what role does continuing education play in cloud monitoring?

To replace initial certification requirements
To prevent professionals from advancing in their careers
To increase testing frequency for compliance purposes
To keep professionals current with evolving standards, technologies, and best practices (Correct answer)

Correct answer: To keep professionals current with evolving standards, technologies, and best practices

Continuing education ensures professionals stay current with new developments, evolving standards, and emerging best practices in their field, maintaining competence throughout their careers.

Question 7: When using E-MapReduce (EMR) on Alibaba Cloud, where is it recommended to store large datasets to reduce costs and decouple storage from compute?

On a dedicated RDS instance
On EMR worker node local SSDs only
Directly on EMR master node local disks
On Alibaba Cloud OSS (Object Storage Service) (Correct answer)

Correct answer: On Alibaba Cloud OSS (Object Storage Service)

Best practice with EMR is to store large datasets on OSS, allowing you to scale compute clusters independently, shut them down when idle, and avoid paying for persistent local storage.

Question 8: What is a best practice in Alibaba Cloud Certified Associate load balancing?

Any practice that is easy to implement
A method or technique recognized as superior based on evidence and expert consensus (Correct answer)
The cheapest available approach
A practice used only by large organizations

Correct answer: A method or technique recognized as superior based on evidence and expert consensus

Best practices are methods, techniques, or approaches that are recognized through evidence, research, and expert consensus as producing superior results and are recommended for adoption.

Question 9: In a typical Alibaba Cloud big data pipeline, what role does Log Service (SLS) play?

Centralized log collection, storage, querying, and real-time analysis of machine-generated data (Correct answer)
Columnar storage for analytics
Hadoop cluster management
Data visualization

Correct answer: Centralized log collection, storage, querying, and real-time analysis of machine-generated data

Log Service (SLS) is Alibaba Cloud's platform for collecting, storing, indexing, and analyzing log and metric data from applications, servers, and services in real time.

Question 10: 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.

Container Service
ECS
OSS (Correct answer)
CDN

Correct answer: OSS

Explanation: OSS is the best solution because it provides scalable and durable storage for rapidly growing video data, ensuring quick access to historical footage when needed.

Question 11: Which approach is most effective for mastering object storage service in Alibaba Cloud Certified Associate?

Studying only immediately before examinations
Combining theoretical study with practical application and regular review (Correct answer)
Memorizing textbook definitions without understanding
Relying solely on on-the-job experience

Correct answer: Combining theoretical study with practical application and regular review

The most effective approach combines theoretical understanding with practical application, reinforced by regular review and assessment, enabling deeper comprehension and long-term retention.

Question 12: In Alibaba Cloud Certified Associate, why is auto scaling knowledge important for professional certification?

It is only required for administrative purposes
It has no practical relevance to daily work
It is important only for entry-level positions
It demonstrates competence and ensures practitioners meet established standards (Correct answer)

Correct answer: It demonstrates competence and ensures practitioners meet established standards

Professional certification in specific knowledge areas demonstrates that practitioners have met established competency standards, ensuring quality of service and public protection.

Question 13: What is the main advantage of using Hologres over MaxCompute for analytics workloads?

Hologres provides sub-second interactive query latency, whereas MaxCompute is optimized for batch processing (Correct answer)
Hologres has higher data storage limits
Hologres is cheaper for batch ETL jobs
Hologres supports more programming languages

Correct answer: Hologres provides sub-second interactive query latency, whereas MaxCompute is optimized for batch processing

Hologres is purpose-built for real-time interactive analytics with sub-second query latency, while MaxCompute is optimized for large-scale batch data processing jobs.

Question 14: In Alibaba Cloud Certified Associate, what is the purpose of an audit trail in information systems?

To track employee personal social media usage
To increase system processing speed
To maintain a chronological record of system activities and changes (Correct answer)
To reduce storage requirements

Correct answer: To maintain a chronological record of system activities and changes

An audit trail creates a chronological record of all system activities, including who accessed the system, what changes were made, and when, supporting accountability and compliance.

Question 15: In Alibaba Cloud Certified Associate, what is the primary benefit of implementing automated cloud computing basics?

Increasing manual processing requirements
Eliminating the need for skilled professionals
Reducing quality standards
Increased efficiency, accuracy, and consistency in operations (Correct answer)

Correct answer: Increased efficiency, accuracy, and consistency in operations

Automation improves operational efficiency by reducing human error, increasing processing speed, ensuring consistency, and freeing professionals to focus on tasks requiring human judgment.

Question 16: Which Alibaba Cloud service is used to collect, subscribe to, and distribute real-time message streams, similar to Apache Kafka?

DataHub (Correct answer)
EventBridge
Log Service (SLS)
Message Service (MNS)

Correct answer: DataHub

DataHub is Alibaba Cloud's real-time data ingestion and distribution service that acts as a pub/sub message bus for streaming data, similar to Apache Kafka.

Question 17: When odpscmd is used to connect to a project in MaxCompute, the command ______ can be executed to view the size of the space occupied by table table_a.

show table table_a;
analyze table table_a;
desc table_a;
size table_a; (Correct answer)

Correct answer: size table_a;

Explanation: In MaxCompute, when using odpscmd to connect to a project, the command "size table_a;" can be executed to view the size of the space occupied by table table_a. This command provides information about the storage consumption of the specified table, helping users to monitor and manage their data resources effectively.

Question 18: Which Alibaba Cloud service provides a fully managed platform for building, training, and deploying machine learning models?

Quick BI
Machine Learning Platform for AI (PAI) (Correct answer)
MaxCompute
DataWorks

Correct answer: Machine Learning Platform for AI (PAI)

Platform for AI (PAI) is Alibaba Cloud's end-to-end machine learning platform covering data preparation, model training, evaluation, and online/batch inference deployment.

Question 19: Which backup strategy in Alibaba Cloud Certified Associate provides the most comprehensive data protection?

Storing all data on a single device
Regular incremental backups combined with periodic full backups (Correct answer)
Printing all records on paper only
Backing up data only once a year

Correct answer: Regular incremental backups combined with periodic full backups

A combination of regular incremental backups (capturing changes) and periodic full backups provides comprehensive data protection, balancing storage efficiency with recovery capability.

Question 20: What is the relationship between theory and practice in Alibaba Cloud Certified Associate virtual private cloud?

Theory and practice are completely unrelated
Practice is only important; theory is unnecessary
Theory provides the foundation and framework that guides effective practical application (Correct answer)
Theory replaces the need for any practical experience

Correct answer: Theory provides the foundation and framework that guides effective practical application

Theory and practice are complementary: theoretical knowledge provides the conceptual framework and understanding that guides effective, evidence-based practical application in professional settings.

Question 21: What is the primary objective of load balancing in Alibaba Cloud Certified Associate?

To generate revenue for testing organizations
To ensure competence and proficiency in core load balancing concepts (Correct answer)
To limit access to the profession
To replace practical experience entirely

Correct answer: To ensure competence and proficiency in core load balancing concepts

The primary objective of load balancing knowledge is to ensure practitioners have the competence and proficiency needed to perform effectively and safely in their professional roles.

Question 22: Which approach is most effective for mastering load balancing in Alibaba Cloud Certified Associate?

Memorizing textbook definitions without understanding
Relying solely on on-the-job experience
Combining theoretical study with practical application and regular review (Correct answer)
Studying only immediately before examinations

Correct answer: Combining theoretical study with practical application and regular review

The most effective approach combines theoretical understanding with practical application, reinforced by regular review and assessment, enabling deeper comprehension and long-term retention.

Question 23: Which RAM policy element is used to specify the Alibaba Cloud resource an action applies to?

Resource (Correct answer)
Effect
Action
Condition

Correct answer: Resource

The Resource element in a RAM policy uses an ARN (Alibaba Cloud Resource Name) format to identify the specific resource the policy statement applies to.

Question 24: Which Alibaba Cloud feature allows you to deploy an ACK application across multiple regions for disaster recovery?

ACK Federation with multi-cluster management via ARMS
ACK built-in geo-replication with automatic failover
Alibaba Cloud Multi-Region Kubernetes Federation (using YAML replication across clusters)
Global Traffic Manager (GTM) combined with independent ACK clusters per region (Correct answer)

Correct answer: Global Traffic Manager (GTM) combined with independent ACK clusters per region

Multi-region ACK deployments typically use Global Traffic Manager (GTM) or Alibaba Cloud DNS for traffic routing across independently deployed ACK clusters in different regions.

Question 25: What does system integration mean in Alibaba Cloud Certified Associate elastic computing service?

Disabling connections between departments
Operating each system independently without data sharing
Connecting different systems so they can work together and share data seamlessly (Correct answer)
Replacing all systems with a single application

Correct answer: Connecting different systems so they can work together and share data seamlessly

System integration connects different technology systems to work together seamlessly, enabling data sharing, reducing redundancy, and improving workflow efficiency across the organization.

Question 26: What is the primary consideration when implementing new technology in Alibaba Cloud Certified Associate?

Choosing based on brand popularity alone
Selecting the most expensive option available
Implementing without user input or testing
Ensuring compatibility with existing systems and meeting user requirements (Correct answer)

Correct answer: Ensuring compatibility with existing systems and meeting user requirements

Successful technology implementation requires ensuring compatibility with existing infrastructure, meeting actual user needs, providing adequate training, and following a structured deployment plan.

Question 27: What is the difference between qualitative and quantitative research in Alibaba Cloud Certified Associate?

Quantitative cannot be used in social sciences
There is no meaningful difference between them
Qualitative is always more rigorous than quantitative
Qualitative explores experiences and meanings; quantitative measures and counts numerical data (Correct answer)

Correct answer: Qualitative explores experiences and meanings; quantitative measures and counts numerical data

Qualitative research explores experiences, perceptions, and meanings through methods like interviews and observation. Quantitative research measures variables numerically through surveys, experiments, and statistical analysis.

Question 28: In Alibaba Cloud RAM, what does the wildcard character '*' mean when used in the Action element of a policy?

It grants or denies all actions for the specified service (Correct answer)
It restricts the action to read-only operations
It applies the policy only to the root account
It applies the policy globally across all regions

Correct answer: It grants or denies all actions for the specified service

Using '*' in the Action element matches all actions for the targeted service or across all services, effectively granting or denying full access.

Question 29: In Alibaba Cloud Certified Associate, why is load balancing knowledge important for professional certification?

It is only required for administrative purposes
It demonstrates competence and ensures practitioners meet established standards (Correct answer)
It has no practical relevance to daily work
It is important only for entry-level positions

Correct answer: It demonstrates competence and ensures practitioners meet established standards

Professional certification in specific knowledge areas demonstrates that practitioners have met established competency standards, ensuring quality of service and public protection.

Question 30: What is the primary consideration when implementing new technology in Alibaba Cloud Certified Associate?

Selecting the most expensive option available
Implementing without user input or testing
Choosing based on brand popularity alone
Ensuring compatibility with existing systems and meeting user requirements (Correct answer)

Correct answer: Ensuring compatibility with existing systems and meeting user requirements

Successful technology implementation requires ensuring compatibility with existing infrastructure, meeting actual user needs, providing adequate training, and following a structured deployment plan.

Question 31: Your website has a 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.

Server Load Balancer
Auto Scaling (Correct answer)
VPC
RDS

Correct answer: Auto Scaling

Explanation: Auto Scaling automatically adjusts the number of ECS instances based on changes in demand or conditions. During sudden spikes in traffic, Auto Scaling can quickly provision additional instances to handle the increased load. This ensures that the system can efficiently manage traffic peaks and maintain a consistent user experience by dynamically scaling resources up or down as needed.

Alibaba Cloud Certified Associate (ACA) Cloud Computing

The ACA Cloud Computing certification validates foundational knowledge of Alibaba Cloud services including compute, storage, networking, databases, and security. It is designed for engineers and architects who work with or plan to deploy Alibaba Cloud solutions.

Questions

35 min

Time Limit

60%

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