Mixed Deck — All ACA Topics Flashcards

Which of the following best describes a RAM user?

Answer: An entity created under an Alibaba Cloud account representing a person or application

A RAM user is a sub-identity created within an Alibaba Cloud account to represent a specific person or application with its own credentials.

In Alibaba Cloud Certified Associate, what role does continuing education play in virtual private cloud?

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.

What is the primary objective of auto scaling in Alibaba Cloud Certified Associate?

Answer: To ensure competence and proficiency in core auto scaling concepts

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

What is a best practice in Alibaba Cloud Certified Associate virtual private cloud?

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.

Which Alibaba Cloud big data service provides a Serverless Spark computing environment that allows running Spark jobs without managing clusters?

Answer: MaxCompute Spark

MaxCompute Spark is Alibaba Cloud's serverless Spark environment that lets you submit Spark jobs on MaxCompute infrastructure without provisioning or managing clusters.

Which storage option is recommended for sharing persistent data between multiple pods in an ACK cluster within the same availability zone?

Answer: Alibaba Cloud NAS (Network Attached Storage) mounted as a PersistentVolume

NAS supports ReadWriteMany (RWX) access mode, allowing multiple pods to mount the same file system simultaneously, unlike block storage which is single-attach.

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?

Answer: We do not know the weight settings of the remaining 4 ECS instances, so we cannot tell what would happen.

Explanation: Without knowing the weight settings of the remaining 4 ECS instances, we cannot determine how the traffic will be distributed among them. The weight setting determines the proportion of traffic that each backend ECS instance receives. Therefore, without this information, we cannot accurately predict the distribution of traffic among the instances.

In Alibaba Cloud Certified Associate, what role does continuing education play in object storage service?

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.

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

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.

In Alibaba Cloud Certified Associate, what is the primary benefit of implementing automated elastic computing service?

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.

A developer needs to access OSS from a mobile app without exposing long-term credentials. Which approach should be used?

Answer: Use STS to issue short-lived tokens for the mobile app

STS temporary credentials are the secure approach for mobile and untrusted environments because they expire and limit exposure if compromised.

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?

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.

Which access control mechanism does MaxCompute use to grant fine-grained permissions on tables, projects, and resources?

Answer: Role-based access control (RBAC) combined with policy-based ACLs

MaxCompute uses role-based access control (RBAC) and fine-grained ACL policies to control who can access projects, tables, functions, and resources within a project.

Which RAM entity should be used to grant an ECS instance permission to call other Alibaba Cloud services without embedding credentials?

Answer: RAM Role

A RAM role assigned to an ECS instance lets the instance obtain temporary credentials automatically, eliminating the need to embed AccessKey credentials.

In Alibaba Cloud Container Registry (ACR) Enterprise Edition, what feature automatically scans images for known CVEs?

Answer: Image Vulnerability Scanning

ACR Enterprise Edition's Image Vulnerability Scanning checks images against CVE databases and can block deployment of images exceeding a configured severity threshold.

E-MapReduce on Alibaba Cloud is built on top of which open-source framework?

Answer: Apache Hadoop and Spark

E-MapReduce (EMR) is Alibaba Cloud's managed big data cluster service built on Apache Hadoop, Spark, and other open-source components.

In Alibaba Cloud Certified Associate, what role does continuing education play in load balancing?

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.

Alibaba Cloud's AnalyticDB for PostgreSQL is best suited for which use case?

Answer: Massively parallel processing (MPP) for large-scale analytical queries

AnalyticDB for PostgreSQL uses a Massively Parallel Processing (MPP) architecture optimized for complex analytical queries over large datasets, making it ideal for data warehouse workloads.

What does the term 'partitioned table' mean in the context of MaxCompute?

Answer: A table divided into logical segments by partition key values to improve query performance and reduce scan costs

In MaxCompute, a partitioned table divides data into logical partitions by one or more column values (e.g., date), allowing queries to scan only relevant partitions and reducing compute costs.

What is the primary purpose of Alibaba Cloud RAM (Resource Access Management)?

Answer: To control user identities and access permissions to cloud resources

RAM is Alibaba Cloud's identity and access management service that lets you control who can access which cloud resources and under what conditions.