Operating Systems Chapter 4: File Management

Questions and Answers

What is the primary characteristic of volatile memory?

It requires power to maintain stored data. (correct)

It retains data without power.

It is cheaper per byte than non-volatile memory.

It is slower than non-volatile memory.

Which of the following is NOT an example of volatile memory?

RAM

Registers

Hard drives (correct)

CPU caches

Which statement correctly describes a difference between volatile and non-volatile memory?

Volatile memory can retain data without power.

Non-volatile memory retains information even without power. (correct)

Non-volatile memory is typically faster than volatile memory.

Volatile memory is generally less expensive than non-volatile memory.

What can be inferred about the pricing between types of memory based on their speed?

Faster memory is more expensive per byte. Signup and view all the answers

In which context will you find the details about hardware management of storage devices?

In the chapter about IOs and devices. Signup and view all the answers

Which of the following statements accurately reflects a trait of non-volatile memory?

It is slower than volatile memory. Signup and view all the answers

Which type of memory is likely to be used for caching due to its speed?

Random Access Memory (RAM) Signup and view all the answers

Which of the following statements is true regarding file management?

It includes aspects like directory and file abstraction. Signup and view all the answers

What is an incorrect assumption about CPU caches when compared to RAM?

CPU caches are slower than RAM. Signup and view all the answers

Which of the following is NOT a feature of volatile memory?

Retains information without power Signup and view all the answers

Non-volatile memory is faster than volatile memory.

False Signup and view all the answers

What is one example of non-volatile memory?

hard drive Signup and view all the answers

______ memory retains information even when power is lost.

Non-volatile Signup and view all the answers

Match the following types of memory with their characteristics:

RAM = Volatile memory that loses data when powered off CPU caches = Fast volatile memory located within the CPU HDD = Non-volatile memory that retains data without power SSD = Faster non-volatile memory compared to HDD Signup and view all the answers

Which characteristic is true about both RAM and CPU caches?

They are both volatile memory types Signup and view all the answers

The cost per byte increases as the speed of memory increases.

True Signup and view all the answers

What is the typical relationship between speed and cost of volatile memory?

The faster the memory, the more expensive per byte. Signup and view all the answers

The chapter will discuss file ______, which includes file and directory abstraction.

management Signup and view all the answers

Study Notes

File Management Overview

Key components of file management include file abstraction, directory abstraction, file systems, and caching.
The chapter does not cover hardware management of storage devices; that will be addressed in the subsequent chapter on I/O and devices.

Volatile vs. Non-Volatile Memory

Volatile Memory
- Requires power to retain stored information.
- Data loss occurs when power is lost.
- Common examples: RAM and CPU caches.
Non-Volatile Memory
- Retains stored information without requiring power.
- Examples include hard disk drives (HDD) and solid-state drives (SSD).
General Characteristics
- Volatile memory is typically faster than non-volatile memory.
- Faster memory usually has a higher cost per byte.
- CPU register access time is approximately 1 nanosecond (ns).

File Management Overview

Key components of file management include file abstraction, directory abstraction, file systems, and caching.
The chapter does not cover hardware management of storage devices; that will be addressed in the subsequent chapter on I/O and devices.

Volatile vs. Non-Volatile Memory

Volatile Memory
- Requires power to retain stored information.
- Data loss occurs when power is lost.
- Common examples: RAM and CPU caches.
Non-Volatile Memory
- Retains stored information without requiring power.
- Examples include hard disk drives (HDD) and solid-state drives (SSD).
General Characteristics
- Volatile memory is typically faster than non-volatile memory.
- Faster memory usually has a higher cost per byte.
- CPU register access time is approximately 1 nanosecond (ns).

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Description

Explore the key concepts of file management in operating systems. This chapter covers file and directory abstraction, file systems, and caching mechanisms. Understand how these elements work together to manage files efficiently within a system.