Concurrency Control in DBMS

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Questions and Answers

What is concurrency control in DBMS?

Concurrency control in DBMS is a concept that ensures the simultaneous execution or manipulation of data by several processes or users without resulting in data inconsistency.

What is a transaction in DBMS?

A transaction in DBMS is a set of logically related operations.

What are the main operations of a transaction?

The main operations of a transaction are Read(A), Write(A), and W(A).

What does the Read(A) operation do?

The Read(A) operation reads the value of A from the database and stores it in a buffer in the main memory. Signup and view all the answers

What does the Write(A) operation do?

The Write(A) operation writes the value back to the database from the buffer. Signup and view all the answers

What is the purpose of concurrency control in DBMS?

Concurrency control in DBMS ensures the simultaneous execution or manipulation of data by several processes or users without resulting in data inconsistency. Signup and view all the answers

Define transaction in the context of DBMS.

A transaction is a set of logically related operations that are executed as a single unit. It ensures the atomicity, consistency, isolation, and durability (ACID) properties of data. Signup and view all the answers