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Questions and Answers
What does a transaction in the serializable isolation level see?
What does a transaction in the serializable isolation level see?
- Only the query itself
- Changes made after the transaction began
- Changes committed at the time the transaction began (correct)
- Changes made by other users
When is serializable isolation level suitable?
When is serializable isolation level suitable?
- For environments with frequent dirty reads
- For environments with short transactions updating a large number of rows
- For environments with long-running read-only transactions (correct)
- For environments with high chances of concurrent transactions modifying the same rows
What is guaranteed in serializable isolation regarding the read consistency of a transaction?
What is guaranteed in serializable isolation regarding the read consistency of a transaction?
- Every row read by the transaction will be different when reread
- Changes made by other transactions are immediately visible to the query
- Results of queries may change during the transaction
- The results of any query will remain consistent for the duration of the transaction (correct)
What types of reads do serializable transactions not experience?
What types of reads do serializable transactions not experience?
When can a serializable transaction modify a row in Oracle Database?
When can a serializable transaction modify a row in Oracle Database?
What error message does the database generate when a serializable transaction attempts to update or delete data modified by a different transaction that committed after the serializable transaction began?
What error message does the database generate when a serializable transaction attempts to update or delete data modified by a different transaction that committed after the serializable transaction began?
In the event of a serializable transaction failing with the ORA-08177 error, what action can an application take?
In the event of a serializable transaction failing with the ORA-08177 error, what action can an application take?
To prevent a serialized access problem in a serializable transaction, what action should be avoided?
To prevent a serialized access problem in a serializable transaction, what action should be avoided?
What happens if a serializable transaction does not attempt to change a row committed by another transaction after it began?
What happens if a serializable transaction does not attempt to change a row committed by another transaction after it began?
In the context of serializable transactions, what does 'serializable access problem' refer to?
In the context of serializable transactions, what does 'serializable access problem' refer to?
Where was Mahatma Gandhi born and raised?
Where was Mahatma Gandhi born and raised?
How did Gandhi describe his philosophy of resistance?
How did Gandhi describe his philosophy of resistance?
What honorific title was given to Gandhi in South Africa in 1914?
What honorific title was given to Gandhi in South Africa in 1914?
Where did Gandhi train in law before returning to India?
Where did Gandhi train in law before returning to India?
In what year did Gandhi move to South Africa to represent an Indian merchant?
In what year did Gandhi move to South Africa to represent an Indian merchant?
What did Gandhi focus on after assuming leadership of the Indian National Congress in 1921?
What did Gandhi focus on after assuming leadership of the Indian National Congress in 1921?
At what age did Gandhi return to India from South Africa?
At what age did Gandhi return to India from South Africa?
What was Gandhi's primary goal throughout his leadership?
What was Gandhi's primary goal throughout his leadership?
Where did Gandhi first employ nonviolent resistance in a campaign for civil rights?
Where did Gandhi first employ nonviolent resistance in a campaign for civil rights?
What did the honorific title 'Mahātmā' mean?
What did the honorific title 'Mahātmā' mean?
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