ACA Big Data and Analytics Services 3

Question 1

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

Accepted Answer

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

Answer

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.

Question 2

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

Accepted Answer

Machine Learning Platform for AI (PAI)

Answer

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 3

In Alibaba Cloud's big data services, what is DataV primarily used for?

Accepted Answer

Building large-screen, real-time data visualization dashboards for public displays

Answer

DataV is Alibaba Cloud's data visualization service designed to create large-format, real-time visualization dashboards often used for command centers, exhibitions, and situation rooms.

Question 4

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

Accepted Answer

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

Answer

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.

Question 5

What is the primary purpose of the 'External Table' feature in MaxCompute?

Accepted Answer

Querying data stored in external systems like OSS directly from MaxCompute without importing it

Answer

MaxCompute External Tables allow you to query data stored in external sources such as OSS (Object Storage Service) directly using SQL without physically importing the data into MaxCompute.

ACA - Alibaba Cloud Certified Associate Practice Test

ACA - Alibaba Cloud Certified Associate Practice Test

ACA Big Data and Analytics Services 3