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Oracle 1Z1-182考古题推薦 &最新1Z1-182試題

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Oracle 1Z1-182 考試大綱：

主題
簡介

主題 1

• Moving Data: This section evaluates the expertise of Data Migration Specialists in moving data within Oracle databases. It includes using external tables, executing Oracle Data Pump operations, and distinguishing SQL*Loader commands for importing data efficiently.

主題 2

• Describe Oracle Database Architecture: This section of the exam measures the skills of Database Administrators and System Architects in understanding the Oracle database architecture. It covers the configurations of Oracle database instances, memory structures like SGA and PGA, and process structures such as background processes. It also explains the logical and physical database structures, including datafiles, control files, and redo log files.

主題 3

• Displaying Creating and Managing PDBs: This section assesses the knowledge of Cloud Database Architects in creating pluggable databases (PDBs) from seeds or other techniques. It also covers modifying PDB modes and attributes to meet specific application requirements.

主題 4

• Managing Storage: This section tests the knowledge of Storage Engineers in managing storage features such as resumable space allocation, segment space-saving, and block space management. It also includes defining segment characteristics to optimize storage utilization.

主題 5

• Configuring Oracle Net Services: This section measures the skills of Network Administrators and Database Administrators in configuring Oracle Net Services. It includes identifying administration components, describing connection methods, and ensuring seamless communication between clients and databases.

主題 6

• Employ Oracle-Supplied Database Tools: This section evaluates the abilities of Database Engineers and Support Specialists in identifying and using Oracle-supplied tools for managing databases. It focuses on leveraging tools to monitor, troubleshoot, and optimize database performance effectively.

主題 7

• Describe Managing Database Instances: This section tests the knowledge of Database Administrators in performing essential tasks for managing database instances. It includes starting and shutting down databases, utilizing dynamic performance views, managing initialization parameter files, and using the Automatic Diagnostic Repository (ADR) for troubleshooting.

主題 8

• Managing Tablespaces and Datafiles: This section assesses the abilities of Storage Administrators in creating, modifying, and describing tablespaces. It also covers recognizing data storage requirements and understanding datafile placement for efficient storage management.

主題 9

• Introduction to Auditing: This domain tests the abilities of Compliance Specialists in implementing database auditing practices. It includes creating, modifying, and maintaining auditing policies while applying value-based auditing techniques like Fine-Grained Auditing (FGA).

主題 10

• Introduction to Performance: This section evaluates the expertise of Performance Analysts in summarizing Oracle database performance management techniques. It includes measuring database performance using SQL execution plans, directives, and advisors to ensure optimal system efficiency.

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最新1Z1-182試題 - 1Z1-182資訊

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最新的 Oracle Database 23ai 1Z1-182 免費考試真題 (Q45-Q50):

問題 #45
Which two statements are true about the DUAL table?

• A. It can be accessed only by the SYS user.
• B. It can be accessed by any user who has the SELECT privilege in any schema.
• C. It can display multiple rows and columns.
• D. It can be used to display only constants or pseudo columns.
• E. It can display multiple rows but only a single column.
• F. It consists of a single row and single column of VARCHAR2 data type.

答案：B,F

解題說明：
A .True. DUAL is public; any user with SELECT can query it.
B .True. One row, one VARCHAR2 column (DUMMY).
C .False. Fixed at one row.
D .False. Not restricted to SYS.
E .False. One row, one column only.
F .False. Can return expressions, not just constants.

問題 #46
Which two statements are true concerning logical and physical database structures?

• A. All tablespaces may have one or more data files.
• B. A segment's blocks can be of different sizes.
• C. A segment might have only one extent.
• D. Segments can span multiple tablespaces.
• E. A segment can span multiple data files in some tablespaces.
• F. A segment's blocks can be of different sizes.

答案：C,E

解題說明：
False. All blocks in a segment use the tablespace's block size (e.g., 8KB). While a database can have tablespaces with different block sizes (e.g., 8KB, 32KB), a single segment's blocks are uniform, as it resides in one tablespace.
Explanation:
Logical structures (e.g., segments, extents) map to physical structures (e.g., data files, blocks). Let's dissect each option:
A : A segment can span multiple data files in some tablespaces.
True. A segment (e.g., a table or index) is a logical entity stored in a tablespace. In a smallfile tablespace (default in Oracle), a segment's extents can span multiple data files if the tablespace has multiple files and space allocation requires it. This is common in large tables or when autoextend adds new files.
Mechanics:Oracle allocates extents across available data files in a round-robin fashion (with ASSM) or as needed, ensuring the segment's data is distributed. This doesn't apply to bigfile tablespaces, which use a single data file.
Example:A 10GB table in a tablespace with two 5GB data files will span both.
B : Segments can span multiple tablespaces.
False. A segment is confined to a single tablespace. Oracle enforces this to maintain logical separation (e.g., a table's data stays in its assigned tablespace). Partitioned tables can have partitions in different tablespaces, but each partition is a separate segment.
Why Not:The segment header and extent map reside in one tablespace, preventing cross-tablespace spanning for a single segment.
C : A segment might have only one extent.
True. A segment starts with one extent upon creation (e.g., a small table or index). If no further growth occurs, it remains a single-extent segment. This is common with small objects or when INITIAL extent size suffices.
Mechanics:In locally managed tablespaces (default), the initial extent is allocated based on INITIAL or tablespace defaults (e.g., 64KB), and additional extents are added only as needed.
D : All tablespaces may have one or more data files.
False. Bigfile tablespaces are restricted to one data file (up to 128TB). Smallfile tablespaces (traditional) can have multiple data files (up to 1022), but the "all" phrasing makes this false due to bigfile exceptions.
Clarification:The question's intent may assume smallfile tablespaces, but Oracle 23ai supports both types.

問題 #47
Which two are benefits of external tables?

• A. They can be queried while the database is in the MOUNT state like dynamic performance views.
• B. They support UPDATEs, which transparently updates records in the file system as if they were table rows.
• C. They can be queried, transformed, and joined with other tables without having to load the data first.
• D. The results of a complex join or aggregating function or both can be unloaded to a file for transportation to other systems.
• E. They support DELETEs, which transparently deletes records in the file system as if they were table rows.

答案：C,D

解題說明：
A .False. External tables are read-only; no DELETE.
B .False. Require OPEN state, unlike V$ views.
C .False. No UPDATE support; read-only.
D .True. Queryable like regular tables without loading.
E .True. Data Pump can unload query results to files.

問題 #48
Examine this command: SQL> ALTER TABLE ORDERS SHRINK SPACE COMPACT; Which two statements are true?

• A. Dependent indexes become UNUSABLE.
• B. The SHRINK operation causes rows to be moved to empty space starting from the beginning of the ORDERS segment.
• C. The SHRINK operation causes rows to be moved to empty space starting toward the end of the ORDERS segment.
• D. The high-water mark (HWM) of ORDERS is adjusted.
• E. Queries and DML statements are allowed on ORDERS while the SHRINK is executing.
• F. Only queries are allowed on ORDERS while SHRINK is executing.

答案：B,E

解題說明：
A . Dependent indexes become UNUSABLE.False. SHRINK SPACE COMPACT does not affect index usability; only SHRINK SPACE without COMPACT may require index maintenance if CASCADE is omitted.
B . ... starting toward the end of the ORDERS segment.False. Rows are compacted toward the beginning of the segment, not the end.
C . Only queries are allowed ...False. Both queries and DML are allowed during SHRINK SPACE COMPACT as it's an online operation.
D . The high-water mark (HWM) of ORDERS is adjusted.False. COMPACT moves rows but doesn't adjust the HWM; the full SHRINK SPACE command is needed for HWM adjustment.
E . Queries and DML statements are allowed ...True. This is an online operation in 23ai, allowing concurrent access.
F . ... starting from the beginning of the ORDERS segment.True. Rows are moved to fill free space from the segment's start.

問題 #49
Which two statements describe why Database Auditing is a security requirement?

• A. To protect against data theft by a non-authorized user.
• B. To protect against data corruption.
• C. To alert DBAs about system issues.
• D. To monitor suspicious activity.
• E. To monitor proper usage of the system and data by privileged users.

答案：D,E

解題說明：
A .True. Auditing tracks suspicious actions.
B .False. That's monitoring, not auditing.
C .False. Auditing detects, doesn't prevent.
D .False. Corruption is a reliability issue.
E .True. Ensures privileged user compliance.

問題 #50
......

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