How can you enable a trace for a session?,gather statistics on a table?

These two Oracle utilities are used for loading data into the database. The difference is that the import utility relies on the data being produced by another Oracle utility EXPORT while the SQL*Loader utility allows data to be loaded that has been produced by other utilities from different data sources just so long as it conforms to ASCII formatted or delimited files.

Name two files used for network connection to a database.

TNSNAMES.ORA and SQLNET.ORA

How do you list the files in an UNIX directory while also showing hidden files?

ls -ltra

How do you execute a UNIX command in the background?

Use the "&"

What UNIX command will control the default file permissions when files are created?

Umask

Explain the read, write, and execute permissions on a UNIX directory.

Read allows you to see and list the directory contents.

Write allows you to create, edit and delete files and subdirectories in the directory.

Execute gives you the previous read/write permissions plus allows you to change into the directory and execute programs or shells from the directory.

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