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Predefined exceptions in PL/SQL include:
• NO_DATA_FOUND: Raised when a SELECT statement returns no rows.
• TOO_MANY_ROWS: Raised when a SELECT INTO statement retrieves multiple rows.
• DUP_VAL_ON_INDEX: Raised when attempting to insert a duplicate value into a specific index.
• ZERO_DIVIDE: Raised when dividing by zero.
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