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Questions and Answers
What is the main purpose of serializability in DBMS?
What is the main purpose of serializability in DBMS?
- To identify nonserial schedules that are incorrect
- To identify nonserial schedules that are correct and maintain database consistency (correct)
- To increase the number of serial schedules
- To ensure interleaving of transactions
In the context of transaction processing, what is a serializable schedule?
In the context of transaction processing, what is a serializable schedule?
- A schedule where transactions occur concurrently
- A non-serial schedule that maintains database consistency
- A schedule that violates database consistency
- A schedule where all transactions occur sequentially (correct)
What does a serial schedule guarantee in terms of transaction execution?
What does a serial schedule guarantee in terms of transaction execution?
- Random execution of transactions
- Sequential execution of transactions (correct)
- Concurrent execution of transactions
- No execution of transactions
How is a non-serial schedule classified based on serializability?
How is a non-serial schedule classified based on serializability?
In what scenario is a non-serial schedule considered serializable?
In what scenario is a non-serial schedule considered serializable?
What characteristic distinguishes a serializable schedule from a non-serializable one?
What characteristic distinguishes a serializable schedule from a non-serializable one?
How does a serial schedule ensure database consistency?
How does a serial schedule ensure database consistency?
What is an invalid scenario for a nonrecoverable schedule?
What is an invalid scenario for a nonrecoverable schedule?
What is the key characteristic of a recoverable schedule?
What is the key characteristic of a recoverable schedule?
How does a precedence graph help in identifying conflicts between transactions?
How does a precedence graph help in identifying conflicts between transactions?
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