Podcast
Questions and Answers
What is a limitation of a single central processing unit (CPU)?
What is a limitation of a single central processing unit (CPU)?
- It can execute multiple processes simultaneously
- It can only execute commands in sequence
- It can only execute processes with identical commands
- It can only execute one process at a time (correct)
What is a characteristic of multiprogramming operating systems?
What is a characteristic of multiprogramming operating systems?
- They suspend all processes before executing the next one
- They execute some commands from one process, then switch to another (correct)
- They execute only one process at a time
- They execute all processes simultaneously
How do multiprogramming operating systems handle multiple processes?
How do multiprogramming operating systems handle multiple processes?
- They prioritize one process over the others
- They execute some commands from each process in a sequence (correct)
- They execute each process simultaneously
- They suspend all other processes when one is executing
Why do multiprogramming operating systems suspend a process?
Why do multiprogramming operating systems suspend a process?
What is the benefits of multiprogramming operating systems?
What is the benefits of multiprogramming operating systems?
What happens to a transaction in the first case?
What happens to a transaction in the first case?
What is the opposite of a committed transaction?
What is the opposite of a committed transaction?
What is the main topic of discussion on Slide 1-24?
What is the main topic of discussion on Slide 1-24?
What is a type of failure?
What is a type of failure?
What is the relationship between recovery and failure?
What is the relationship between recovery and failure?
Which property of transactions ensures that database transactions are executed to completion?
Which property of transactions ensures that database transactions are executed to completion?
What is the primary objective of the atomicity property in database transactions?
What is the primary objective of the atomicity property in database transactions?
Which of the following is ensured by the atomicity property of transactions?
Which of the following is ensured by the atomicity property of transactions?
What happens to a transaction if atomicity is enforced?
What happens to a transaction if atomicity is enforced?
What is the consequence of atomicity in database transactions?
What is the consequence of atomicity in database transactions?
What is a requirement for a committed transaction in a database?
What is a requirement for a committed transaction in a database?
What happens to the changes made by a committed transaction in case of a failure?
What happens to the changes made by a committed transaction in case of a failure?
What is the purpose of a committed transaction in a database?
What is the purpose of a committed transaction in a database?
Why are committed transactions important in a database?
Why are committed transactions important in a database?
What happens if a committed transaction is lost due to a failure?
What happens if a committed transaction is lost due to a failure?
What type of failure occurs when a system or component suddenly stops functioning, causing widespread damage or disruption?
What type of failure occurs when a system or component suddenly stops functioning, causing widespread damage or disruption?
What operation is responsible for retrieving data from a database?
What operation is responsible for retrieving data from a database?
What is the primary function of the write_item operation in a database?
What is the primary function of the write_item operation in a database?
What is the term for a failure that occurs gradually over time, rather than suddenly?
What is the term for a failure that occurs gradually over time, rather than suddenly?
What is the relationship between the read_item and write_item operations in a database?
What is the relationship between the read_item and write_item operations in a database?
Study Notes
Processing and Executing Transactions
- A single CPU can only execute one process at a time, but multiprogramming operating systems can execute commands from multiple processes by suspending and resuming them.
Transaction Properties
- Atomicity requires that a transaction is executed to completion, and changes to the database must persist even in the event of a failure.
Types of Failures
- Catastrophic failure: a type of failure that can cause data loss or corruption.
Database Operations
- Read_item operation: reads data from the database.
- Write_item operation: writes data to the database.
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Description
Learn about how multiprogramming operating systems manage processes, executing commands from one process and then suspending it to execute commands from the next. Understand the basics of process management in OS.
