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Oracle Database 19c: RAC, ASM, and Grid Infrastructure Administration

Navigating Cluster Engine Topologies: Why Applied High Availability Architecture Outperforms Static Review Sheets

The modern enterprise database administration and high-availability cloud infrastructure landscape in 2026 relies heavily on zero-downtime cluster orchestration, fault-tolerant shared storage, and active-active database scaling. As global organizations run mission-critical transactional engines on Oracle Database 19c, database administrators, infrastructure engineers, and systems architects must master the full spectrum of Oracle Real Application Clusters (RAC), Automatic Storage Management (ASM), and Grid Infrastructure. Earning the Oracle Database 19c: RAC, ASM, and Grid Infrastructure Administration credential (1Z0-078) validates your advanced technical capacity to configure Clusterware resource stacks, tune Global Cache Fusion mechanics, manage ACFS file systems, and execute rolling grid upgrades. However, many senior database administrators and technical leads struggle on this intensive 120-minute proctored examination because they approach it as a simple syntax drill. Relying on flat answer repositories or context-stripped question files found on unverified public forums cannot prepare you for the intricate situational logic of resolving voting disk split-brain conditions, diagnosing inter-node interconnect packet drops, or configuring Transparent Application Continuity (TAC) failover pools under active enterprise transaction workloads.

True success on this 60–65 question expert-level evaluation requires a comprehensive, multi-dimensional command of both terminal-level Grid Infrastructure utilities (CRSCTL, SRVCTL) and underlying operating system kernel interactions. High-availability architects must demonstrate sharp diagnostic judgment when evaluating Oracle Cluster Registry (OCR) backup strategies, configuring ASM disk group rebalance speeds, managing Flex Cluster hub-and-leaf node topologies, and troubleshooting server-side connect-time load balancing. Candidates frequently spend several months searching for high-yield 1z0-078 exam questions online, hoping to locate an updated oracle database 19c rac asm and grid infrastructure administration 1z0-078 study guide to evaluate their configuration skills, or reviewing log files to verify their Cluster Health Monitor (CHM) metric traces. Without interactive workspace environments, a structured database administration course, or targeted practical practice that can provide actual help in exam preparation, passive reading fails to build the diagnostic capabilities needed to handle node evictions or isolate interconnect latency bottlenecks within the active cluster fabric.

At Exact2Pass, we replace passive reading with active, scenario-driven structural engineering exercises designed to build true platform confidence. Our premium preparation workspace simulates the functional operational layers, Grid Infrastructure management consoles, and real-time RAC performance diagnostic tools of the active Oracle 19c ecosystem. We guide you through executing gap analyses on legacy cluster configurations, setting up ASM rebalance operations, configuring Multitenant PDB services across server pools, and executing non-disruptive rolling patches using OPatchauto. This focused practice builds the exact data-sovereignty judgment and system execution skills demanded by top-tier enterprise consultation teams, ensuring you pass your official Oracle University proctored assessment on your very first try.

The 1Z0-078 certification exam is engineered to evaluate your end-to-end cluster deployment, storage virtualization, and high-availability administration capabilities across modern enterprise parameters. Our realistic simulation platform replicates active Grid Infrastructure command-line interfaces, ASM dynamic volume managers, and real-time AWR cluster performance monitors instead of serving up generic multiple-choice questionnaires. You will master the underlying database separations, operator-driven storage allocations, and security-level dependencies of the active Oracle 19c platform, preparing you to tackle any scenario-based infrastructure question with ease.

Question # 1

Identify three prerequisites for the successful installation of Oracle Grid Infrastructure 19c when using Full Featured Grid Naming Service (GNS). (Choose three.)

A.

Each cluster node must have at least two network interface cards.

B.

You must enable the Name Server Cache Daemon

C.

A DHCP service on the private network for the cluster is required to allocate virtual IP addresses for HAIP.

D.

A DHCP service on the public network for the cluster is required to allocate virtual IP addresses as required by the cluster.

E.

DNS must be configured to delegate name resolution for the cluster subdomain to the cluster.

F.

You must create a Grid Management Repository database.

Question # 2

Examine the output of this command:

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

To increase the size of the ACFS file system, you execute this command as the root user:

$ /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 # 3

Which three statements are true about the administration and use of policy sets in Oracle 19c Clusterware? (Choose three.)

A.

All server pools in a cluster are controlled by the policy set, when user-defined policy management is used.

B.

Clusterware administrators cannot directly modify the policy set when Quality of Service (QoS) Management is used.

C.

A server pool can have different attributes defined for different policies in the policy set, when user-defined policy management is used.

D.

A server pool can have the same attributes defined for different policies in the policy set, when user-defined policy management is used.

E.

Servers in a server pool outside the control of the policy set are never affected by policy changes, when user-defined policy management is used.

Question # 4

Which three statements are true about an Oracle Database RAC software installation? (Choose three.)

A.

SSH user equivalence for the Oracle user can be set up before the software installation.

B.

Fix-up scripts generated during the installation must be run as root on UNIX platforms.

C.

The software must be installed into a local file system on each node.

D.

The software must be installed into a cluster file system.

E.

RAC installations require Oracle Enterprise Edition.

F.

The software can be installed into an ACFS file system.

G.

The software must be installed on all nodes in the cluster.

Question # 5

Which three statements are true about ASM Cloud File System (ACFS) replication? (Choose three.)

A.

Replication is automatically terminated if the primary file system has less than 2 GB free space.

B.

ACFS auditing information is replicated from the primary file system to the standby file system.

C.

Standby redo log files are required on the standby site for synchronous redo transport.

D.

The privilege sysrepl has been introduced for ACFS replication.

E.

One site of an ACFS replication configuration can host both primary and standby file systems.

Question # 6

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 # 7

Which two components must always be defined or specified by an administrator to make an application highly available using Oracle 92c Clusterware? (Choose two.)

A.

an application VIP

B.

A Server Pool

C.

a resource dependency definition

D.

an application resource

E.

a script agent

Question # 8

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

Question # 9

Which two methods exist for enabling the collection of additional resource debugging information for specific resources controlled by Oracle 19c Clusterware? (Choose two.)

A.

Use the crsct1 set trace res "resource_name=debugging_level" command.

B.

Use the crsct1 set log res "resource_name=debugging_level2" command.

C.

Set the environment variable _USR_ORA_DEBUG=1 and then stop and restart the resource that requires resource debugging data to be collected.

D.

Use the cluvfy comp command for the specific resource within a component.

Question # 10

You want to create a tablespace, SALES , with these requirements:

1. Its data file has an alias name sales.dbf .

2. Its data file is stored in the directory CURRENT_YR in the disk group DATA .

Examine this command:

SQL > CREATE TABLESPACE sales;

Which two tasks must you perform to meet these requirements? (Choose two.)

A.

Create the current yr directory in the root directory (+).

B.

Create the current yr directory in the +data disk group.

C.

Add the DATAFILE '+DATA/CURRENT YR/sales.dbf clause to the command.

D.

Add the autoextend on clause to the command.

E.

lAdd the DATAFILE '/CURRENT YR/sales.dbf clause to the command.

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