DBMS Data Transmission and Execution

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Questions and Answers

What is the primary purpose of a program in a computer?

To resolve a problem or task

What happens to a program when it is executed?

It is loaded into the main memory and becomes a process.

What is the distinction between a program and a process?

A program is a static entity, while a process is a program in a running state.

Why must a program be loaded into the main memory before it can be executed?

<p>Because this is a rule of computer operation.</p> Signup and view all the answers

What is the purpose of normalization in database management?

<p>To normalize the data.</p> Signup and view all the answers

What is a program in programming language and what is its equivalent in DBMS?

<p>A program in programming language and its equivalent in DBMS is a query.</p> Signup and view all the answers

What is a process in programming language and what is its equivalent in DBMS?

<p>A process in programming language and its equivalent in DBMS is a transaction.</p> Signup and view all the answers

What is an example of a transaction in a banking system?

<p>Withdrawing or depositing money is an example of a transaction in a banking system.</p> Signup and view all the answers

What happens to the balance amount in an account when you deposit money?

<p>The balance amount increases by the deposited amount.</p> Signup and view all the answers

What is a transaction in the context of DBMS?

<p>A transaction is an individual smallest unit of work.</p> Signup and view all the answers

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Study Notes

Database Management System (DBMS) and Transactions

  • In DBMS, a program is equivalent to a query, and a process is equivalent to a transaction.
  • A program is a static entity saved on a disk, and when it's executed, it's loaded into main memory and becomes a process.
  • Similarly, in DBMS, a query is a set of instructions to achieve a task or objective, and when it's executed, it becomes a transaction.
  • A transaction is an individual smallest unit of work in DBMS, similar to a process in programming.

Transactions in Real-Life Scenarios

  • In a banking system, transactions refer to operations such as withdrawing or depositing money.
  • These operations involve updating records, such as increasing or decreasing the balance amount in an account.
  • In DBMS, these operations are considered transactions, not processes, because they deal purely with the database.

Key Characteristics of Transactions

  • A transaction is a single unit of work that can be executed independently.
  • It's a self-contained operation that can be committed or rolled back as a whole.
  • Transactions are used to ensure data consistency and integrity in a database.

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