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NEW QUESTION: 1
Amazon EC2는 무엇을 제공합니까?
A. 코드를 실행하는 플랫폼 (Java, PHP, Python)으로 매시간 지불합니다.
B. 클라우드의 가상 서버.
C. 클라우드의 컴퓨터 클러스터.
D. 고객이 원격으로 관리하는 물리적 서버.
Answer: B
NEW QUESTION: 2
ユーザーのコンピューターが違法ファイルをホストしている疑いがあります。 IT部門はコンピューターを取り外し、セキュリティで保護された暗号化された部屋に置きました。この部屋は、地方自治体が到着するまで保管されます。 IT部門は次のうちどのアクションを実行する必要がありますか?
A. 許容される使用の違反を特定する
B. データの整合性を保持
C. 適切なチャネルを通じて報告する
D. 違法行為の証拠を収集する
Answer: B
NEW QUESTION: 3
What is used to determine the level of access users and servers have to a database?
A. Execution Control List
B. Access Control List
C. Policy settings
D. Server document
Answer: B
NEW QUESTION: 4
Which statement is true about an automatic SQL task?
A. It will tune all the top SQL statements from AWR irrespective of the time it takes to complete the task in a maintenance window.
B. It will automatically implement SQL profiles if a three-fold benefit can be achieved and automatic profile implementation is enabled.
C. It will attempt to tune all-long-running queries that have existing SQL profiles.
D. It will attempt to tune the currently running SQL statements that are highly resource intensive.
E. It will automatically implement new SQL profiles for the statements that have existing SQL profiles.
Answer: B
Explanation:
Optionally, implements the SQL profiles provided they meet the criteria of threefold performance improvement The database considers other factors when deciding whether to implement the SQL profile. For example, the database does not implement a profile when the objects referenced in the statement have stale optimizer statistics. SQL profiles that have been implemented automatically show type is AUTO in the DBA_SQL_PROFILES view. If the database uses SQL plan management, and if a SQL plan baseline exists for the SQL statement, then the database adds a new plan baseline when creating the SQL profile. As a result, the optimizer uses the new plan immediately after profile creation.
Incorrect: E:Oracle Database automatically runs SQL Tuning Advisor on selected high-load SQL statements from the Automatic Workload Repository (AWR) that qualify as tuning candidates. This task, called Automatic SQL Tuning, runs in the default maintenance windows on a nightly basis. By default, automatic SQL tuning runs for at most one hour. Note: After automatic SQL tuning begins, the database performs the following steps: Oracle Database analyzes statistics in AWR and generates a list of potential SQL statements that are eligible for tuning. These statements include repeating high-load statements that have a significant impact on the database. The database tunes only SQL statements that have an execution plan with a high potential for improvement. The database ignores recursive SQL and statements that have been tuned recently (in the last month), parallel queries, DML, DDL, and SQL statements with performance problems caused by concurrency issues. The database orders the SQL statements that are selected as candidates based on their performance impact. The database calculates the impact by summing the CPU time and the I/O times in AWR for the selected statement in the past week. During the tuning process, the database considers and reports all recommendation types, but it can implement only SQL profiles automatically.
Reference: OracleDatabase Performance Tuning Guide,Automatic SQL Tuning