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User Scott has updated the salary of one of the employees in the EMPLOYEES table and has not committed the transaction. What are the two types of lock 阅读全文
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When you try to start the Database Control by using the emctl start dbconsole command the following error is displayed:TZ set to America/New_yorkOC4J 阅读全文
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You need to rename a data file of a tablespace. How would you perform this? A. bring the database to the NOMOUNT state, rename the data file using the 阅读全文
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You have a listener process, L1, currently listening for the connections to the PROD and ADMIN databases. You create a new database, PAY, using CREATE 阅读全文
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You executed the following command in the lsnrctl utility to stop the listener: lsnrctl> STOP L1 What is the effect of this command if L1 is the only 阅读全文
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You have a production instance running on your server. UNDO_RETENTION is not long enough to satisfy read-consistency requirements. How do you change t 阅读全文
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In which two cases would you perform only consistent backup? (Choose two.) A. You are working on a database where downtime is not tolerated. B. You ar 阅读全文