17.Which two statements are true about tablespaces? A) A database can contain multiple undo tablespaces. B) A database can contain only a single temporary tablespace. C) A database instance stores undo data In the SYSTEM tablespace If no undo tablesp…

16.Your database Is configured In archivelog mode. The USERS01 tablespace Is currently online. You are required to take the tablespace offline. Which clause or clauses ensure that no media recovery is required when the tablespace Is brought back onli…

36.Which two are true about roles? A) A role can be granted a combination of system and object privileges and other roles. B) The CONNECT role Is granted automatically to a user when It Is created. C) Roles are owned by SYSTEM. D) The RESOURCE role I…

choose two You plan to upgrade your Oracle Database 9i to Oracle Database 12c. Which two methods can you use? A) Perform a direct upgrade by manually running the catctl.pl and catupgrd.sql scripts before issuing the STARTUPUPGRADE command. B) Upgrade…

8.Which two are true about the Fast Recovery Area (FRA)? A) It should be larger than the database. B) Space management In the FRA Is Influenced by the database backup retention policy. C) A database must be in ARCHIVELOG mode to use the FRA. D) It mu…

13.Which two are true about AWR snapshots? A) They are stored In the SYSAUX tablespace. B) They are not generated if STATISTICS_LEVEL Is set to TYPICAL. C) They can be modified by using DMLs. D) They can be retained forever. E) They are always create…

10.Which two are true about consistent database backups? A) They can only be taken when a RECOVERY CATALOG is used. B) They can only be taken if the database Is in ARCHIVELOG mode. C) They can only be taken If shutdown NORMAL, TRANSACTIONAL, or IMMED…

31.Which two events always request the LGWR to write? A) when LGWR is notified by a server process that performs a Commit or ROLLBACK B) When PMON restarts a server process C) when DBWn writes dirty buffers D) when a log switch occurs E) when a check…

30.Which is true when a database instance is shut down? A. Only transactional and normal modes wait for all uncommitted transactions to commit or rollback and then close the database. B. Immediate, transactional, and normal modes all result in a chec…

11.Which three are true about UNDO data? A) It is used to roll back failed transactions. B) It is used to rewind a database by using FLASHBACK DATABASE. C) It is used to recover dropped tables by using FLASHBACK TABLE … TO BEFORE DROP. D) It is used…

9.Which is true about the Automatic Diagnostic Repository (ADR)? A) It includes diagnostic data for critical errors for each server and background process. B) Its location is always set by the ORACLE_BASE variable. C) It is used only if the DIAGNOSTI…

7.Which is true about external tables? A) The ORACLE_DATAPUMP access driver can be used to write data to external tables. B) Segments are allocated for external tables. C) They do not support partitioning. D) They may have Indexes. E) DML operations…

14.Which command is used to display files that no longer conform to the backup retention policy? A) REPORT OBSOLETE B) SHOW DATAFILE BACKUP COPIES C) CROSSCHECK BACKUP D) LIST EXPIRED BACKUP Answer:A…

新冠疫情深刻和全面地影响着社会和生活,已经成为数学建模竞赛的背景帝. 本文收集了与新冠疫情相关的的数学建模竞赛赛题,供大家参考,欢迎收藏关注. 『Python小白的数学建模课 @ Youcans』带你从数模小白成为国赛达人. 0. 前言:新冠疫情成了数模竞赛的背景帝 新冠疫情爆发以来,不仅严重影响到全球的政治和经济,也深刻和全面地影响着社会和生活的方方面面,甚至已经成为数学建模竞赛的背景帝. 传染病模型本来就是数学建模课程中的常见问题和模型.随着疫情的影响越来越严重.广泛和持久,不仅疫情传播.疫…

24. YOUR DB_RECOVERY_FILE_DEST_SIZE Is 8G. Currently, 5G of the space Is used of which 4G consists of obsolete backups. You execute this command: SQL> ALTER SYSTEM SET db_recovery_file_dest_size=2G; What is the outcome? A) It changes DB_RECOVERY_FILE…

choose one Which users are created and can be used for database and host management of your DBaaS database servers? A) cloud and oracle users B) root, oracle and cloud users C) root and oracle users D) opc and oracle users E) root, opc and oracle use…

1.One of your databases has archive logging enabled and RMAN backups are taken at regular intervals. The data file for the users tablespace is corrupt. Which command must you execute before starting the recovery of this tablespace ? A) SWITCH DATAFIL…

6.You are installing Oracle Grid Infrastructure by using the Oracle Universal Installer (OUI). You select the "Install and Configure Grid Infrastructure for a Standalone Server" option. Which task is performed by OUI as part of this installation…

27.Examine these facts about a database: 1. USERS is the database default tablespace. 2. USER1, USER2, AND USER3 have the CREATE SESSION privilege. 3. They also have UNLIMITED QUOTA on the default tablespace USERS. 4. They have no other privileges. E…

19.Which is true about invalid PL/SQL objects? A) They are automatically recompiled against the new definition of a referenced object at the same time as the referenced object is modified. B) They can be manually recompiled only by using SQL commands…

18.You want to Install Oracle 11g database software and create a database on ASM Immediately after the Install. Your plan is to install both Oracle database and Grid Infrastructure. Which two are true in this scenario? A) Grid Infrastructure must be…

32. Examine these commands and their output: • SQL> SELECT * FROM emp; • ENO ENAME • ---- ----- • 100 Adam • 101 Alan • SQL> INSERT INTO emp VALUES(102,'Ben"); • 1 row created. • SQL> COMMIT; • Commit completed. • SQL> UPDATE emp SET enam…

29.In one of your databases: * The database default tablespace is EXAMPLE. * Deferred_segment_creation is false. Examine these commands: SQL> create user user1 identified by oracle_4u password expire; User created. SQL> alter user user1 account unlo…

23.Which two are true about data dictionary and dynamic performance views (v$ views)? A) All database users have access to ALL_* views. B) Data dictionary view output is subject to read consistency. C) The defining queries for Oracle supplied dynamic…

22.You are planning a software installation for both Oracle Database 11g Release 1 and Release 2. You plan to have at lease one database for each release managed by Grid Infrastructure for a Standalone Server. Which three are true in this scenario? A…

21.Which two are true about roles? A) A role can be password-protected. B) A role can be granted to another role. C) Only one default role can be granted to a user. D) A role can be granted only multiple system privileges not multiple object privileg…

20. Which is true about the SYSTEM and SYSAUX tablespaces? A) The SYSAUX tablespace can be made read-only but the SYSTEM tablespace cannot. B) Both tablespaces can be used for temporary storage if no temporary tablespace is defined. C) Only the SYSTE…

[题目1] A record is modified on 1/1/2008. It meets criteria for a time-based workflow rule; this rule schedules an action for 7 days after rule execution. On 1/4/2008 the record is modified and no longer meets workflow rule criteria. On 1/5/2008 the re…

choose one In your Oracle 12c database, you plan to execute the command: SQL> CREATE TABLESPACE tbsl DATAFILE '/u02/oracle/data/tbs0l.dbf' SIZE 50M; The u02 file system has 1 GB of free space available. What is the outcome? A) It raises an error beca…

三.编程题(4小题共40.0分)程序及结果写入对应文框内 1. 孪生素数查找程序. 所谓孪生素数指的是间隔为2 的相邻素数,就像孪生兄弟.最小的孪生素数是(3, 5),在100 以内的孪生素数还有 (5, 7), (11, 13), (17, 19), (29, 31), (41, 43), (59, 61) 和(71, 73),总计有 8 组. 现给定一个正整数number,要求编程计算出小于等于number的孪生素数的组数,请根据要求,完成getPrimeTwins方法. 方法原型如下: /…