Oracle Database 12c: RAC and Grid Infrastructure AdministratorはIT業界で広く認知された認定資格であり、取得すればスキルの証明として大きな強みになります。CertShikenの1z0-068練習問題（152問）は専門家チームが監修し、2026年の試験内容に対応しています。

Oracle 1z0-068 試験概要:

認定ベンダー:	Oracle
試験名:	Oracle Database 12c: RAC and Grid Infrastructure Administrator
試験番号:	1Z0-068
関連資格:	Oracle Certified Professional (OCP) Oracle Database 12c Oracle Certified Expert (OCE) RAC and Grid Infrastructure Oracle Certified Associate (OCA) Oracle Database 12c
対応言語:	英語
試験時間:	150 分
出題数:	60-70問（試験のバージョンにより異なります）
合格点:	変動制（通常は調整スコアで約60-65%）
試験形式:	単一選択式, 複数選択式
認定の有効期間:	有効期限なし（Oracleの認定ポリシーはトラックやバージョンによって異なります）
受験料:	$245 USD（国によって異なります）
推奨トレーニング:	Oracle Database 12c ドキュメント Oracle University RACトレーニング
受験申し込み:	Pearson VUE Oracle試験 Oracle認定資格の申し込み
サンプル問題:
受験方法:	Pearson VUEテストセンターでのコンピュータベース試験、またはオンライン監督付き試験（地域による）
前提条件:	推奨：Oracle Database 12cのインストールおよび管理経験、Oracle Linuxおよびネットワーク概念に関する知識
公式シラバスのURL:	https://education.oracle.com

Oracle 1z0-068 試験シラバストピック:

1z0-068試験の疑問を解決するFAQ

Oracle Database 12c: RAC and Grid Infrastructure Administrator 認定 1z0-068 試験問題：

問題 #1

Which two statements are true regarding server-side connect-time load balancing for a RAC database when using SCAN listeners?

A. It is based on performance metrics provided by the database instances LREG processes.
B. LOCAL_LISTENER must be configured to point to the SCAN to enable server-side load balancing.
C. It's enabled only when LOAD_BALANCE=YES is included in the TNS entry used by the client.
D. Server-side load balancing requires the REMOTE_LISTENER to point to the SCAN.
E. The service's connection load balancing goal must be manually configured to enable server-side connect-time load balancing.

問題 #2

Which two actions guarantee that time is synchronized properly on all nodes in a cluster after installing Oracle Grid Infrastructure 12c? (Choose two.)

A. If network time protocol (NT P) is not configured properly on all cluster nodes, then Oracle Cluster Time Synchronization Service (CTSSD) will start automatically in active mode when the clusterwareis started.
B. Deactivate network time protocol (NTP) on all cluster nodes; Oracle Cluster Time Synchronization Service (CTSSD) will then start automatically in active mode when the clusterware is started.
C. Configure network time protocol (NTP) on all cluster nodes, and then start the Oracle Cluster Time Synchronization Service (CTSSD) in active mode on all cluster nodes.
D. If network time protocol (NTP) time servers are unreachable on any cluster node, then Oracle CTSSD Time Synchronization Service (CTSSD) will start automatically in active mode when the clusterware is started.
E. Configure network time protocol (NT P) on all cluster nodes; Oracle Cluster Time Synchronization Service (CTSSD) will then start automatically in observer mode when the clusterware is started.

問題 #3

PROD1, PROD2, and PROD3 are three Instance that have the PROD database open.
The OLTP service was created using:
$ srvctl add service -db prod -service OLTP -preferred PROD1, PROD2 -available PROD3 After starting the OLTP service, you execute this command:
$ srvctl stop instance -db prod -instance " PROD1, PROD2 " -stopoption immediate -f Which statement is true about the outcome of this command?

A. PROD1and PROD2 are not shut down because OLTP must first be stopped.
B. PROD1and PROD2 are not shut down because OLTP must first be manually relocated to PROD3.
C. It shuts down PROD1 and PROD2; OLTP will not be started on PROD3.
D. It shuts down PROD1 and PROD2; OLTP will be started automatically on PROD3.
E. It shuts down either PROD1or PROD2 but not both, so that OLTP remains available on a preferred instance.

問題 #4

Examine this query and output:
SQL> select order_flag, cache_size, session_flag, keep_value,
2 from user_sequences where sequence_name = 'SEQ1';
O CACHE_SIZE S K
-- ------------------- -- --
Y 10 N N
Performance analysis revealed severe SQ enqueue contention on the SEQ1 sequence.
The SEQ1 sequence is incremented from all instances equally and is frequently used.
Which two statements should you execute to reduce SQ enqueue contention?

A. alter sequence seq1 keep;
B. alter sequence seq1 order;
C. exec sys.dbms_shared_pool.keep ('SEQ1', 'Q')
D. alter sequence seq1 noorder;
E. alter sequence seq1 cache 10000;

問題 #5

Which task must be performed before running the OPatch utility to patch Oracle Grid Infrastructure 12c?

A. Update the PATH environment variable on the node where will run the OPatch utility to point to the
$ORACLE_HOME/OPatch directory.
B. Update the PATH environment variable on each cluster node to point to the $ORACLE_HOME/OPatch directory.
C. Stage the patch on the cluster nodes.
D. Stage the patch on the cluster node where the OPatch utility will be executed.

解説：