Free ACA Big Data Certification Exam ACA-BigData1 Exam Practice Test

Your company stores user profile records in an OLTP databases. You want to join these records withweb server logs you have already ingested into the Hadoop file system. What is the best way to obtainand ingest these user records?Score 2

• Ingest with Hadoop streaming
• Ingest using Hive
• Ingest with sqoop import
• Ingest with Pig's LOAD command

In a scenario where a large enterprise plans to use MaxCompute to process and analyze its data, tensof thousands of tables and thousands of tasks are expected for this project, and a project team of 40members is responsible for the project construction and O&M. From the perspective of engineering,which of the following can considerably reduce the cost of project construction and management?Score 2

• Develop directly on MaxCompute and use script-timed scheduling tasks
• Use DataWorks
• Use Eclipse
• Use a private platform specially developed for this project

If the DataWorks(MaxCompute) tables in your request belong to two owners. In this case, DataGuard(DataWorks component) automatically splits your request into two by table owner.Score 1

• True
• False

MaxCompute can coordinate multiple users to operate one project through ACL authorization. Theobjects that can be authorized by ACL include ______. (Number of correct answers: 3)Score 2

• Project
• Table
• Resource
• Procedure

DataV is a powerful yet accessible data visualization tool, which features geographic information systems allowing for rapid interpretation of data to understand relationships, patterns, and trends. When a DataV screen is ready, it can embed works to the existing portal of the enterprise through ______.

• URL after the release
• URL in the preview
• MD5 code obtained after the release
• Jar package imported after the release

A distributed file system like GFS and Hadoop are design to have much larger block(or chunk) sizelike 64MB or 128MB, which of the following descriptions are correct? (Number of correct answers: 4)Score 2

• It reduces clients' need to interact with the master because reads and writes on the same block( or chunck) require only one initial request to the master for block location information
• Since on a large block(or chunk), a client is more likely to perform many operations on a given block, it can reduce network overhead by keeping a persistent TCP connection to the metadata server over an extended period of time
• It reduces the size of the metadata stored on the master
• The servers storing those blocks may become hot spots if many clients are accessing the same small files
• If necessary to support even larger file systems, the cost of adding extra memory to the meta data server is a big price

There are various methods for accessing to MaxCompute, for example, through management console, client command line, and Java API. Command line tool odpscmd can be used to create, operate,or delete a table in a project.Score 1

• True
• False

The data development mode in DataWorks has been upgraded to the three-level structurecomprising of _____, _____, and ______. (Number of correct answers: 3)Score 2

• Project
• Solution
• Business flow
• Directory

Scenario: Jack is the administrator of project prj1. The project involves a large volume of sensitive data such as bank account, medical record, etc. Jack wants to properly protect the data. Which of the follow statements is necessary?

• set ProjectACL=true;
• add accountprovider ram;
• set ProjectProtection=true;
• use prj1;

Alibaba Cloud E-MapReduce can be easily plugged with other Alibaba Cloud services such as Log Service, ONS, MNS that act as data ingestion channels from real-time data streams. Which of the following descriptions about real-time processing are correct? (Number of correct answers: 3)

• This data is streamed and processed using Apache Flume or Kafka in integration with Apache Storm using complex algorithms
• Kafka is usually preferred with Apache Storm to provide data pipeline
• The final processed data can be stored in HDFS, HBase or any other big data store service in real time.
• Apache Sqoop is used to do the real-time data transmission of structured data