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1Z0-062 · Question #326

Identify three situations in which messages are written to the alert log file. (Choose three.)

The correct answer is A. Rebuilding an index using ALTER INDEX . . . REBUILD fails with an ORA-01578: ORACLE D. Updating a record in a table returns "ORA-00060: deadlock detected while waiting for F. Running a query on a table returns "ORA-01578: ORACLE data block corrupted (file # 4, block. The alert log records critical database errors, administrative operations, and significant events that impact database integrity or availability.

Performing Database Maintenance

Question

Identify three situations in which messages are written to the alert log file. (Choose three.)

Options

  • ARebuilding an index using ALTER INDEX . . . REBUILD fails with an ORA-01578: ORACLE
  • BCreating a table returns "ORA-00955: name is already in used by an existing object"
  • CInserting a value into a table returns "ORA-01722: invalid number"
  • DUpdating a record in a table returns "ORA-00060: deadlock detected while waiting for
  • EInserting a value into a table returns "ORA-00001: unique constraint (SYS.PK_XXXX) violated"
  • FRunning a query on a table returns "ORA-01578: ORACLE data block corrupted (file # 4, block

How the community answered

(61 responses)
  • A
    72% (44)
  • B
    8% (5)
  • C
    15% (9)
  • E
    5% (3)

Why each option

The alert log records critical database errors, administrative operations, and significant events that impact database integrity or availability.

ARebuilding an index using ALTER INDEX . . . REBUILD fails with an ORA-01578: ORACLECorrect

Failures during critical administrative operations, such as rebuilding an index, especially when associated with block corruption (ORA-01578), are recorded in the alert log as they indicate potential structural or data integrity issues.

BCreating a table returns "ORA-00955: name is already in used by an existing object"

An 'ORA-00955: name is already in use' error is a common DDL error indicating a naming conflict, which is typically returned to the user session and not considered a critical database event for the alert log.

CInserting a value into a table returns "ORA-01722: invalid number"

An 'ORA-01722: invalid number' error is a user-level or application-level data type conversion error that occurs during DML operations and is not logged to the alert log.

DUpdating a record in a table returns "ORA-00060: deadlock detected while waiting forCorrect

Deadlocks (ORA-00060) are critical internal database events that signify contention for resources and can lead to application hangs, and thus are always recorded in the alert log for diagnostic purposes.

EInserting a value into a table returns "ORA-00001: unique constraint (SYS.PK_XXXX) violated"

An 'ORA-00001: unique constraint violated' error is an application-level data integrity error that occurs during DML operations when a unique constraint is violated and is not logged to the alert log.

FRunning a query on a table returns "ORA-01578: ORACLE data block corrupted (file # 4, blockCorrect

Data block corruption (ORA-01578) is a severe data integrity issue indicating physical or logical damage to database blocks, which is always reported in the alert log to alert the DBA of potential data loss or inconsistency.

Concept tested: Oracle alert log contents for critical events

Source: https://docs.oracle.com/en/database/oracle/oracle-database/23/admin/managing-diagnostic-data.html#GUID-F247920A-8C2A-4B6A-B66A-959D7A39B219

Topics

#Alert Log#ADR#Error Messages#Database Diagnostics

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