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What is the purpose of CONCURRENCY CONTROL in database management?
What is the purpose of CONCURRENCY CONTROL in database management?
- To prioritize certain transactions over others.
- To speed up the execution of transactions.
- To allow all transactions to access and modify the database simultaneously.
- To enforce isolation (through mutual exclusion) among conflicting transactions. (correct)
Which best describes a transaction in a DBMS?
Which best describes a transaction in a DBMS?
- A single operation on a database.
- The execution of a sequence of one or more operations on a database to perform some higher-level function. (correct)
- An isolated query on a database.
- A group of unrelated operations on a database.
What happens in the Strawman System when a transaction arrives at the DBMS?
What happens in the Strawman System when a transaction arrives at the DBMS?
- The DBMS allows all transactions to run simultaneously.
- The DBMS randomly selects which transaction to execute first.
- The DBMS executes each transaction one-by-one in a serial order. (correct)
- The DBMS rejects the transaction.
Why are partial transactions not allowed in a DBMS?
Why are partial transactions not allowed in a DBMS?
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What is the basic unit of change in a DBMS?
What is the basic unit of change in a DBMS?
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