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 1z0-078 Dumps with Practice Exam Questions Answers

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Last Update: Aug 30, 2025

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1z0-078 Question Includes: Single Choice Questions: 12, Multiple Choice Questions: 65,

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1z0-078 Questions and Answers

Question # 1

Examine the output of this command:

TheACFSdisk group is a normal redundancy disk group with 5 GB of free space.

To increase the size of theACFSfile system, you execute this command as therootuser:

$ /sbin/acfsutil size +200M /u01/app/grid/acfsmount

Which two statements are true regarding the outcome of this command? (Choose two.)

A.

It fails to resize voli because it must be executed as a user belonging to the sysasm group.

B.

It fails to resize the filesystem because it must be unmounted before resizing.

C.

It succeeds but leaves the file system unmounted.

D.

It resizes voli.

E.

It resizes the filesystem mounted on /u01/app/grid/acfsmount.

Question # 2

Which two statements are true about the Global Enqueue Service, Instance Locks, and global enqueues in Oracle 19c RAC? (Choose two.)

A.

Global Enqueues and Instance Locks replace mutexes completely in RAC database instances.

B.

Global Enqueues may have converters and waiters in the same instance.

C.

Global Enqueues may have owners and waiters in the same instance.

D.

Global Enqueues and Instance Locks replace latches completely in RAC database instances.

E.

In a RAC database, there is no LMDO process if only one instance is running.

F.

In a RAC One Node database, there is no LMD) process if only one instance is running.

Question # 3

Which three statements are true regarding ASM on a four-node cluster? (Choose three.)

A.

ASM Cluster File System (ACFS) can be deployed on any nodes.

B.

A database instance on a node can be a client of an ASM instance running on any node.

C.

A database instance on a node cannot be a client of an ASM instance running on other nodes.

D.

A database instance on a node can only be a client of an ASM instance running on the same node.

E.

A database instance on a node uses an ASM instance as an I/O server when requesting I/O to diskgroups.

F.

An ASM instance and database instances can coexist on the same node.

Question # 4

Which two statements are true about Oracle Clustered ASM performance? (Choose two.)

A.

Data files, redo logs, and RMAN backup pieces must be stored in different ASM disk groups for optimal performance.

B.

All ASM Disks belonging to a disk group should be of the same size for optimal performance.

C.

Hardware-based mirroring combined with ASM mirroring guarantees optimal performance.

D.

All ASM Disks belonging to a disk group should have the same hardware specifications and storage attributes for optimal performance.

E.

To improve performance a database must have two disk groups; one for data and one for the fast recovery area.

Question # 5

Which three statements are true about accessing ASM files? (Choose three.)

A.

Database instances perform read I/O using an ASM instance as an I/O Server.

B.

Database instances can write metadata to ASM diskgroups.

C.

Database instances perform read I/O directly to ASM Disks.

D.

ASM instances can write metadata to ASM diskgroups.

E.

If a database instance writes to an ASM-based datafile whose redundancy attribute is set to mirror, then the ASM instance writes the mirror copy

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Oracle 1z0-078 Practice Exam FAQs

1. What is the Oracle 1Z0-078 Exam all about?

The Oracle 1Z0-078 exam, officially titled Oracle Database 19c: RAC, ASM, and Grid Infrastructure Administration, certifies your expertise in managing Oracle Real Application Clusters (RAC), Automatic Storage Management (ASM), and Grid Infrastructure.

2. What topics are covered in the Oracle 1Z0-078 Exam?

The Oracle 1z0-078 exam includes the following core areas:

  • Administering Oracle RAC
  • RAC Database Monitoring and Tuning
  • Managing High Availability of Services
  • Installing and Configuring Oracle RAC
  • Managing Backup and Recovery for RAC
  • Managing Global Resources
  • Handling High Availability for Connections and Applications

3. How many questions are on the Oracle 1Z0-078 Exam and what is the format?

The Oracle 1z0-078 exam consists of 77 multiple-choice questions. You’ll have 120 minutes to complete it, and the passing score is 65%.

4. Who should take the Oracle 1Z0-078 Exam?

This exam is designed for database professionals who manage production systems using Oracle RAC, ASM, and Grid Infrastructure. It’s especially relevant for Oracle DBAs aiming to become Oracle Certified Professionals in 19c technologies.

5. What are the prerequisites for the Oracle 1Z0-078 Certification?

While there are no formal prerequisites, Oracle recommends candidates have 12 to 18 months of experience with RAC, ASM, and Grid Infrastructure. Completing Oracle’s RAC, ASM, or Clusterware workshops can also be beneficial.

6. What is the difference between Oracle 1z0-078 and 1z0-084 Exams?

The Oracle 1Z0-078 exam focuses on RAC, ASM, and Grid Infrastructure—ideal for DBAs managing clustered, high-availability environments. In contrast, the 1Z0-084 exam centers on performance tuning, covering SQL optimization, memory management, and diagnostic tools.

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