Oracle 1z0-449 Exam Actual Questions

You need to place the results of a PigLatin script into an HDFS output directory.
What is the correct syntax in Apache Pig?

Correct Answer: B 🗳️
Use the STORE operator to run (execute) Pig Latin statements and save (persist) results to the file system. Use STORE for production scripts and batch mode processing.
Syntax: STORE alias INTO 'directory' [USING function];
Example: In this example data is stored using PigStorage and the asterisk character (*) as the field delimiter.
A = LOAD 'data' AS (a1:int,a2:int,a3:int);
DUMP A;
(1,2,3)
(4,2,1)
(8,3,4)
(4,3,3)
(7,2,5)
(8,4,3)
STORE A INTO 'myoutput' USING PigStorage ('*');
CAT myoutput;
1*2*3
4*2*1
8*3*4
4*3*3
7*2*5
8*4*3
References:
https://pig.apache.org/docs/r0.13.0/basic.html#store

How is Oracle Loader for Hadoop (OLH) better than Apache Sqoop?

Correct Answer: A 🗳️
Oracle Loader for Hadoop provides an efficient and high-performance loader for fast movement of data from a Hadoop cluster into a table in an Oracle database.
Oracle Loader for Hadoop prepartitions the data if necessary and transforms it into a database-ready format. It optionally sorts records by primary key or user- defined columns before loading the data or creating output files.
Note: Apache Sqoop(TM) is a tool designed for efficiently transferring bulk data between Apache Hadoop and structured datastores such as relational databases.
Incorrect Answers:
A, D: Oracle Loader for Hadoop provides an efficient and high-performance loader for fast movement of data from a Hadoop cluster into a table in an Oracle database.
C: Oracle Loader for Hadoop is a MapReduce application that is invoked as a command-line utility. It accepts the generic command-line options that are supported by the org.apache.hadoop.util.Tool interface.
E: The Oracle Linux operating system and Cloudera's Distribution including Apache Hadoop (CDH) underlie all other software components installed on Oracle Big
Data Appliance. CDH includes Apache projects for MapReduce and HDFS, such as Hive, Pig, Oozie, ZooKeeper, HBase, Sqoop, and Spark.
References:
https://docs.oracle.com/cd/E37231_01/doc.20/e36961/start.htm#BDCUG326 https://docs.oracle.com/cd/E55905_01/doc.40/e55814/concepts.htm#BIGUG117

Which three pieces of hardware are present on each node of the Big Data Appliance? (Choose three.)

Correct Answer: ABD 🗳️
Big Data Appliance Hardware Specification and Details, example:
Per Node:
✑ 2 x Eight-Core Intel Xeon E5-2260 Processors (2.2 GHz)
✑ 64 GB Memory (expandable to 256GB)
✑ Disk Controller HBA with 512MB Battery backed write cache
✑ 12 x 3TB 7,200 RPM High Capacity SAS Disks
✑ 2 x QDR (Quad Data Rate InfiniBand)(40Gb/s) Ports
✑ 4 x 10 Gb Ethernet Ports
✑ 1 x ILOM Ethernet Port
References:
http://www.oracle.com/technetwork/server-storage/engineered-systems/bigdata-appliance/overview/bigdataappliancev2-datasheet-1871638.pdf

What two actions do the following commands perform in the Oracle R Advanced Analytics for Hadoop Connector? (Choose two.) ore.connect (type="HIVE") ore.attach ()

Correct Answer: AC 🗳️
You can connect to Hive and manage objects using R functions that have an ore prefix, such as ore.connect.
To attach the current environment into search path of R use:
ore.attach()
References:
https://docs.oracle.com/cd/E49465_01/doc.23/e49333/orch.htm#BDCUG400