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Oracle 1z0-449 Exam Practice Questions (P. 2)

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Question #6
Your customer needs to manage configuration information on the Big Data Appliance.
Which service would you choose?
  1. A
    SparkPlug
  2. B
    ApacheManager
  3. C
    Zookeeper
  4. D
    Hive Server
  5. E
    JobMonitor

Correct Answer:
C
The ZooKeeper utility provides configuration and state management and distributed coordination services to Dgraph nodes of the Big Data Discovery cluster. It ensures high availability of the query processing by the Dgraph nodes in the cluster.
References:
https://docs.oracle.com/cd/E57471_01/bigData.100/admin_bdd/src/cadm_cluster_zookeeper.html

Question #7
You are helping your customer troubleshoot the use of the Oracle Loader for Hadoop Connector in online mode. You have performed steps 1, 2, 4, and 5.
STEP 1: Connect to the Oracle database and create a target table.
STEP 2: Log in to the Hadoop cluster (or client).

STEP 3: Missing step -
STEP 4: Create a shell script to run the OLH job.
STEP 5: Run the OLH job.
What step is missing between step 2 and step 4?
  1. A
    Diagnose the job failure and correct the error.
  2. B
    Copy the table metadata to the Hadoop system.
  3. C
    Create an XML configuration file.
  4. D
    Query the table to check the data.
  5. E
    Create an OLH metadata file.

Correct Answer:
C

Question #8
The hdfs_stream script is used by the Oracle SQL Connector for HDFS to perform a specific task to access data.
What is the purpose of this script?
  1. A
    It is the preprocessor script for the Impala table.
  2. B
    It is the preprocessor script for the HDFS external table.
  3. C
    It is the streaming script that creates a database directory.
  4. D
    It is the preprocessor script for the Oracle partitioned table.
  5. E
    It defines the jar file that points to the directory where Hive is installed.

Correct Answer:
B
The hdfs_stream script is the preprocessor for the Oracle Database external table created by Oracle SQL Connector for HDFS.
References:
https://docs.oracle.com/cd/E37231_01/doc.20/e36961/start.htm#BDCUG107

Question #9
How should you encrypt the Hadoop data that sits on disk?
  1. A
    Enable Transparent Data Encryption by using the Mammoth utility.
  2. B
    Enable HDFS Transparent Encryption by using bdacli on a Kerberos-secured cluster.
  3. C
    Enable HDFS Transparent Encryption on a non-Kerberos secured cluster.
  4. D
    Enable Audit Vault and Database Firewall for Hadoop by using the Mammoth utility.

Correct Answer:
B
HDFS Transparent Encryption protects Hadoop data thats at rest on disk. When the encryption is enabled for a cluster, data write and read operations on encrypted zones (HDFS directories) on the disk are automatically encrypted and decrypted. This process is "transparent" because it’s invisible to the application working with the data.
The cluster where you want to use HDFS Transparent Encryption must have Kerberos enabled.
Incorrect Answers:
D: The cluster where you want to use HDFS Transparent Encryption must have Kerberos enabled.
References:
https://docs.oracle.com/en/cloud/paas/big-data-cloud/csbdi/using-hdfs-transparent-encryption.html#GUID-16649C5A-2C88-4E75-809A-
BBF8DE250EA3

Question #10
What two things does the Big Data SQL push down to the storage cell on the Big Data Appliance? (Choose two.)
  1. A
    Transparent Data Encrypted data
  2. B
    the column selection of data from individual Hadoop nodes
  3. C
    WHERE clause evaluations
  4. D
    PL/SQL evaluation
  5. E
    Business Intelligence queries from connected Exalytics servers

Correct Answer:
AB

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