The services provided in database transaction processing include:

1. Control of interference among concurrent users: This service ensures that multiple users can access the database simultaneously without their transactions interfering with each other. This is achieved through the use of locks and other concurrency control mechanisms.

2. Recovery from failures without loss of completed transactions: This service ensures that the database can recover from failures, such as system crashes or power outages, without losing any transactions that were completed prior to the failure. This is achieved through the use of logging and recovery mechanisms.

3. Optimized processing of SQL SELECT statements: While this is not a service provided specifically by transaction processing, it is a feature of many database management systems. It involves optimizing the execution of SQL SELECT statements to retrieve data from the database as efficiently as possible.

4. Query modification: This is not typically a service provided by transaction processing. Query modification involves changing a query to improve its performance or to ensure it returns the correct results. This is usually a task performed by database administrators or developers, rather than a built-in feature of the database system.

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The services provided in database transaction processing include:

1. Control of interference among concurrent users: This service ensures that multiple users can access the database simultaneously without their transactions interfering with each other. This is achieved through the use of locks and other concurrency control mechanisms.

2. Recovery from failures without loss of completed transactions: This service ensures that the database can recover from failures, such as system crashes or power outages, without losing any transactions that were completed prior to the failure. This is achieved through the use of logging and recovery mechanisms.

3. Optimized processing of SQL SELECT statements: While this is not a service provided specifically by transaction processing, it is a feature of many database management systems. It involves optimizing the execution of SQL SELECT statements to retrieve data from the database as efficiently as possible.

4. Query modification: This is not typically a service provided by transaction processing. Query modification involves changing a query to improve its performance or to ensure it returns the correct results. This is usually a task performed by database administrators or developers, rather than a built-in feature of the database system.

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The services provided in database transaction processing include:

1. Control of interference among concurrent users: This service ensures that multiple users can access the database simultaneously without their transactions interfering with each other. This is achieved through the use of locks and other concurrency control mechanisms.

2. Recovery from failures without loss of completed transactions: This service ensures that the database can recover from failures, such as system crashes or power outages, without losing any transactions that were completed prior to the failure. This is achieved through the use of logging and recovery mechanisms.

3. Optimized processing of SQL SELECT statements: While this is not a service provided specifically by transaction processing, it is a feature of many database management systems. It involves optimizing the execution of SQL SELECT statements to retrieve data from the database as efficiently as possible.

4. Query modification: This is not typically a service provided by transaction processing. Query modification involves changing a query to improve its performance or to ensure it returns the correct results. This is usually a task performed by database administrators or developers, rather than a built-in feature of the database system.

Question 16Identify services provided in database transaction processing. More than one answer is possible.1 pointOptimized processing of SQL SELECT statementsControl of interference among concurrent usersRecovery from failures without loss of completed transactionsQuery modification

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