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

A start-up company wants to use Alibaba Cloud MaxCompute to provide product recommendationservices for its users. However, the company does not have much users at the initial stage, while thecharge for MaxCompute is higher than that of ApsaraDB RDS, so the company should be recommendedto use MaxCompute service until the number of its users increases to a certain size.Score 1

• True
• False

Alibaba Cloud Elastic MapReduce (E-MapReduce) is a big data processing solution to quickly processhuge amounts of data. Based on open source Apache Hadoop and Apache Spark, E-MapReduce flexiblymanages your big data use cases such as trend analysis, data warehousing, and analysis of continuouslystreaming data.Score 1

• True
• False

Synchronous development in DataWorks provides both wizard and script modes.Score 1

• True
• False

In MaxCompute, if error occurs in Tunnel transmission due to network or Tunnel service, the usercan resume the last update operation through the commandtunnel resume;.Score 1

• True
• False

MaxCompute SQL is suitable for processing less real-time massive data, and employs a syntax similarto that of SQL. The efficiency of data query can be improved through creating proper indexes in thetable.Score 1

• True
• False

DataWorks can be used to create all types of tasks and configure scheduling cycles asneeded. The supported granularity levels of scheduling cycles include days, weeks,months, hours, minutes and seconds.

• True
• False

In MaxCompute command line, if you want to view all tables in a project, you can execute command:______.Score 2

• show tables;
• use tables;
• desc tables;
• select tables;

commark is an open-source framework that functions on the service level to support data processingand analysis operations. Equipped with unified computing resources and data set permissions, Spark onMaxCompute allows you to submit and run jobs while using your preferred development methods.Which of the following descriptions about Spark on MaxCompute is NOT correct:Score 2

• Spark on MaxCompute provides you with native Spark Web UIs.
• Different versions of Spark can run in MaxCompute at the same time.
• Similar to MaxCompute SQL and MaxCompute MapReduce, Spark on MaxCompute runs in the unified computing resources activated for MaxCompute projects.
• Spark on MaxCompute has a separate permission system which will not allow users to query data without any additional permission modifications required.

Which of the following is not proper for granting the permission on a L4 MaxCompute table to auser. (L4 is a level in MaxCompute Label-based security (LabelSecurity), it is a required MaxComputeAccess Control (MAC) policy at the project space level. It allows project administrators to control theuser access to column-level sensitive data with improved flexibility.)Score 2

• If no permissions have been granted to the user and the user does not belong to the project, add the user to the project. The user does not have any permissions before they are added to the project.
• Grant a specific operation permission to the user.
• If the user manages resources that have labels, such as datasheets and packages with datasheets, grant label permissions to the user.
• The user need to create a project in simple mode

When we use the MaxCompute tunnel command to upload the log.txt file to the t_log table, the t_log is a partition table and the partitioning column is (p1 string, p2 string). Which of the following commands is correct?

• tunnel upload log.txt t_log/p1='b1'', p2='b2'
• tunnel upload log.txt t_log/(p1='b1'', p2='b2')
• tunnel upload log.txt t_log/p1='b1'/p2='b2'