Oracle Oracle Certifications 1Z0-928 Questions & Answers

• Question 41:

  As the Big Data Cloud Service Administrator, you need to access one of the cluster nodes. Using secure shell, what are the two things you will need in order to access the node?

  A. Name of the cluster node

  B. Private ssh key pair

  C. Name of the service instance

  D. IP Address of the cluster node

  E. Public ssh key pair

  Correct Answer: BD

  Reference: https://docs.oracle.com/en/cloud/paas/big-data-cloud/csbdi/connect-cluster-node-secure-shellssh.html#GUID-29C53AFA-66ED-4649-9A3B-2B5480EC5B53

• Question 42:

  You execute the command hdfs dfs -is to view the directory listing on the Edge/Gateway node in a secured

  cluster, but get an error. You were able to execute the same command successfully 24 hours ago. No

  changes have been made to the user or the infrastructure.

  How do you fix the problem?

  A. You need to obtain a valid Kerberos ticket by executing the KINIT command.

  B. You need to reboot the Hadoop cluster to reinstate access to users.

  C. A valid Kerberos ticket exists but you need to initialize it using the KINIT command.

  D. You are on wrong node. The hdfs dfs -is command can only be executed from the Name Node.

  Correct Answer: A

• Question 43:

  What is the difference between permanent nodes and edge nodes?

  A. Permanent nodes cannot be stopped, whereas you can start and stop edge nodes.

  B. Permanent nodes are for the life of the cluster, whereas edge nodes are temporary for the duration of processing the data Permanent nodes contain your Hadoop data, but edge nodes do not have Hadoop data.

  C. Permanent nodes contain your Hadoop data, but edge nodes do not have Hadoop data.

  D. Permanent nodes contain your Hadoop data, but edge nodes give you the "edge" in processing your data with more processors.

  Correct Answer: B

  Reference: https://docs.oracle.com/en/cloud/paas/big-data-cloud/csbdi/using-oracle-big-data-cloudservice.pdf

• Question 44:

  What is the result of the FLATMAP () function in Spark?

  A. It always returns a new RDD by passing the supplied function used to filter the results.

  B. It always returns a new RDD that contains elements in the source dataset and the argument.

  C. It always returns an RDD with 0, 1, or more elements.

  D. It always returns an RDD with identical size of the input RDD.

  Correct Answer: A

  Reference: https://backtobazics.com/big-data/spark/apache-spark-flatmap-example/

• Question 45:

  During provisioning, which can you create in order to integrate Big Data Cloud with Other Oracle PaaS services?

  A. Attachments

  B. Associations

  C. Couplings

  D. Data Pipelines

  Correct Answer: B

• Question 46:

  You have easily and successfully created clusters with the Oracle Big Data Cloud wizard. You want to

  create a cluster that will be very specific to the needs of your business.

  How would you customize Oracle Big Data Cloud clusters during provisioning?

  A. by using Stack Manager

  B. by using Oracle Enterprise Manager

  C. by using Platform Service Manager UI

  D. by using a Bootstrap script

  Correct Answer: D

  Reference: https://docs.oracle.com/en/cloud/paas/big-data-compute-cloud/csspc/using-oracle-big-datacloud.pdf

• Question 47:

  What is the optimal way in Event Hub Cloud Service to stream data into Object Storage?

  A. Use block storage as temporary data landing.

  B. Use the external database system to push the data to the object store.

  C. Use Kafka connectors.

  D. It is not possible to stream data to object store.

  Correct Answer: C

  Reference: https://cloud.oracle.com/event-hub

• Question 48:

  When you create a cluster, how many permanent nodes must you have before you can have edge nodes?

  A. One

  B. Two

  C. Five

  D. Four

  E. Three

  Correct Answer: D

  Reference: https://docs.oracle.com/en/cloud/paas/big-data-cloud/csbdi/add-nodes-cluster.html#GUIDB6EDF7FB-A94A-4356-AF5E-C9307721F772

• Question 49:

  A company is using Oracle Big Data Cloud Service that has Hive tables owned by user A. The tables are being dropped by user B. How should you implement authorization in Hadoop?

  A. Role-based separation is not possible because Hadoop is a file system.

  B. Configure Apache Record Service

  C. Implement role-based security using Sentry.

  D. Implement role-based security using Kerberos

  Correct Answer: C

  Reference: https://www.cloudera.com/documentation/enterprise/latest/topics/sg_hive_sql.html

• Question 50:

  Which statement is true about Big Data File System in Oracle Big Data Cloud?

  A. It is a transparent distributed cache layer.

  B. It supports HDFS as a datalake concept.

  C. It is a block storage layer.

  D. It offers block storage with NVMe-based SSD.

  Correct Answer: C

  Reference: https://docs.oracle.com/en/cloud/paas/big-data-compute-cloud/csspc/big-data-file-systembdfs.html