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試験番号：1z1-449
試験科目：「Oracle Big Data 2017 Implementation Essentials」
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最近更新時間：2017-09-27
問題と解答：全72問 1z1-449 試験問題集
NO.1 What does the flume sink do in a flume configuration?
A. consumes events delivered to it by an external source such as a web server
B. hosts the components through which events flow from an external source to the next destination
C. forwards events to the source
D. sinks the log file that is transmitted into Hadoop
E. removes events from the channel and puts them into an external repository
Answer: A
1z1-449 前提
Explanation:
A Flume source consumes events delivered to it by an external source like a web server.
The external source sends events to Flume in a format that is recognized by the target
Flume source. When a Flume source receives an event, it stores it into one or more channels.
The channel is a passive store that keeps the event until it's consumed by a
Flume sink.
References: https://flume.apache.org/FlumeUserGuide.html
NO.2 What access driver does the Oracle SQL Connector for HDFS use when reading HDFS data by
using external tables?
A. HADOOP_LOADER
B. ORACLE_BDSQL
C. ORACLE_LOADER
D. ORACLE_HIVE_LOADER
E. ORACLE_HDP
F. ORACLE_DATA_PUMP
Answer: C
1z1-449 英語版 1z1-449 取得
Explanation:
Oracle SQL Connector for HDFS creates the external table definition for Data Pump files by using the
metadata from the Data Pump file header. It uses the ORACLE_LOADER access driver with the
preprocessor access parameter. It also uses a special access parameter named EXTERNAL VARIABLE
DATA, which enables ORACLE_LOADER to read the Data Pump format files generated by Oracle
Loader for Hadoop.
References: https://docs.oracle.com/cd/E37231_01/doc.20/e36961/sqlch.htm#BDCUG356
NO.3 What does the following line do in Apache Pig?
products = LOAD '/user/oracle/products' AS (prod_id, item);
A. The contents of /user/oracle/products are loaded as tuples and aliased to products.
B. The LOAD table is populated with prod_id and item.
C. The products table is loaded by using data pump with prod_id and item.
D. The contents of /user/oracle/products are dumped to the screen.
Answer: A
1z1-449 対応
Explanation:
The LOAD function loads data from the file system.
Syntax: LOAD 'data' [USING function] [AS schema];
Terms: 'data'
The name of the file or directory, in single quote
References: https://pig.apache.org/docs/r0.11.1/basic.html#load
NO.4 Your customer keeps getting an error when writing a key/value pair to a NoSQL replica.
What is causing the error?
A. The replica may be out of sync with the master and is not able to maintain consistency.
B. The data file for the replica is corrupt.
C. The replica is in read-only mode.
D. The writes must be done to the master.
E. The master may be in read-only mode and as result, writes to replicas are not being allowed.
Answer: D
1z1-449 試験
Explanation:
Replication Nodes are organized into shards.
A shard contains a single Replication Node which is responsible for performing database writes, and
which copies those writes to the other Replication Nodes in the shard. This is called the master node.
All other Replication
Nodes in the shard are used to service read-only operations.
Note: Oracle NoSQL Database provides multi-terabyte distributed key/value pair storage that offers
scalable throughput and performance. That is, it services network requests to store and retrieve data
which is organized into key-value pairs.
References:
https://docs.oracle.com/cd/E26161_02/html/GettingStartedGuide/introduction.html
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