Which of the following locks the item from access of any type?

Locks placed by the DBMS are explicit locks.

In optimistic locking, the assumption is made that conflict will occur.

The advantage of optimistic locking is that:

Which of the following refers to a cursor type that when the cursor is opened, a primary key value is saved for each row in the recordset; when the application accesses a row, the key is used to fetch the current values of the row?

A transaction in which either all of the database actions occur or none of them do is called:

The size of a lock is called:

A cursor type in which the application sees the data as they were at the time the cursor was opened is called:

Which of the following refers to a cursor type where changes of any type and from any source are visible?

A cursor type in which the application can only move forward through the recordset is called:

What is the overall responsibility of the DBA?

Locks placed by command are called ________ .

Which of the following disallows both dirty reads and nonrepeatable reads, but allows phantom reads?

Which of the following occurs when one transaction reads a changed record that has not been committed to the database?

Which of the following allows dirty reads, nonrepeatable reads and phantom reads to occur?

Locks placed by the DBMS are called ________ .

Which of the following locks the item from change but not from read?

Which of the following occurs when a transaction rereads data and finds new rows that were inserted by a command transaction since the prior read?

A transaction for which all committed changes are permanent is called:

In this instance, dirty reads are disallowed, while nonrepeatable reads and phantom reads are allowed.