ACA-BigData1 試験問題を無料オンラインアクセス

There are three types of node instances in an E-MapReducecluster: master, core, and _____ .
Score 2

• A.gateway
• B.task
• C.agent
• D.zero-load

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

• A.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
• B.The servers storing those blocks may become hot spots if many clients are accessing the same small files
• C.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
• D.It reduces the size of the metadata stored on the master
• E.If necessary to support even larger file systems, the cost of adding extra memory to the meta data server is a big price

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?

• A.tunnel upload log.txt t_log/(p1="b1", p2="b2")
• B.tunnel upload log.txt t_log/p1="b1", p2="b2"
• C.tunnel upload log.txt t_log/p1="b1"/p2="b2"

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.add user [email protected];
• B.flush privileges;
• C.use prj1;
• D.grant List, CreateTable, CreateInstance on project prj1 to user aliyun$alice@aliyun;

Which of the following Hadoop ecosystem componets can you choose to setup a streaming log analysis system?(Number of correct answers: 3) Score 2

• A.Apache Spark
• B.Apache Flume
• C.Apache Lucene
• D.Apache Kafka