최신 ACA-BigData1 무료덤프 - Alibaba Cloud ACA Big Data Certification

문제1

MaxCompute tasks contain computational tasks and non-computational tasks. The computational tasks require actual operations on data stored in the table. MaxCompute parses the task to obtain its execution plan, and submits the task for execution. The noncomputational tasks require substantial reading of and modification to metadata information. Therefore, the task is not parsed, and no execution plan is provided. The task is directly submitted for execution. The latter one has a faster response speed than the former one. Which of the following operations on the table t_test is a computational task?

A. desc t_test

B. truncate table t_test;

C. select count(*) from t_test;

D. alter table t_test add columns (comments string);

정답: C

문제2

The FTP data source in DataWorks allows you to read/write data to FTP, and supports configuring synchronization tasks in wizard and script mode.
Score 1

A. True

B. False

정답: A

문제3

Scenario: Jack is the administrator of project prj1. A new team member, Alice (already has an Alibaba Cloud account [email protected]), applies for joining this project with the following permissions: view table lists, submit jobs, and create tables. Which of the following SQL statements is useless:
Score 2

A. flush privileges;

B. use prj1;

C. grant List, CreateTable, CreateInstance on project prj1 to user aliyun$alice@aliyun;

D. add user [email protected];

정답: A

문제4

In order to ensure smooth processing of tasks in the Dataworks data development kit, you must create an AccessKey. An AccessKey is primarily used for access permission verification between various Alibaba Cloud products. The AccessKey has two parts, they are ____. (Number of correct answers: 2) Score 2

A. Access Key Secret

B. Access Key ID

C. Access Username

D. Access Password

정답: A,B

문제5

A business flow in DataWorks integrates different node task types by business type, such a structure improves business code development facilitation. Which of the following descriptions about the node type is INCORRECT?
Score 2

A. The SHELL node supports standard SHELL syntax and the interactive syntax. The SHELL task can run on the default resource group

B. A zero-load node is a control node that does not generate any data. The virtual node is generally used as the root node for planning the overall node workflow.

C. An ODPS SQL task allows you to edit and maintain the SQL code on the Web, and easily implement code runs, debug, and collaboration.

D. The PyODPS node in DataWorks can be integrated with MaxCompute Python SDK. You can edit the Python code to operate MaxCompute on a PyODPS node in DataWorks.

정답: D

문제6

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

A. True

B. False

정답: A

문제7

In order to improve the processing efficiency when using
MaxCompute, you can specify the partition when creating a
table. That is, several fields in the table are specified as
partition columns. Which of the following descriptions aboutMaxCompute partition table are correct?
(Number of correct
answers: 4)

A. User can specify multiple partitions, that is, multiple
fields of the table are considered as the partitions of the
table, and the relationship among partitions is similar to
that of multiple directories

B. The partition value cannot have a double byte characters
(such as ChinesE.

C. MaxCompute partition only supports string type and the
conversion of any other types is not allowed

D. If the partition columns to be accessed are specified
when using data, then only corresponding partitions are
read and full table scan is avoided, which can improve the
processing efficiency and save costs

E. In most cases, user can consider the partition to be the
directory under the file system

정답: A,B,D,E

문제8

DataWorks can be used to create all types of tasks and configure scheduling cycles as needed. The supported granularity levels of scheduling cycles include days, weeks, months, hours, minutes and seconds.
Score 1

A. True

B. False

정답: B

최신 ACA-BigData1 무료덤프 - Alibaba Cloud ACA Big Data Certification

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