Operating System File Management

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Questions and Answers

What is the primary function of a micro kernel in an operating system?

To manage hardware resources
To provide a command-line interface for users
To implement system and user level programs
To provide a communication facility between client programs and services (correct)

What is a benefit of using a micro kernel approach in operating system design?

Reduced portability due to complex kernel modifications
Easier extension of the operating system (correct)
Increased reliance on hardware instructions
Increased security risks due to larger kernel size

Which of the following operating systems is NOT an example of a microkernel-based operating system?

MacOS X Server
QNX
Mach
Linux (correct)

What is a characteristic of system programs in a computer system?

They do not differentiate between system calls and hardware instructions (D) Signup and view all the answers

What is a result of having a smaller kernel in a micro kernel approach?

Fewer changes are required when modifying the kernel (A) Signup and view all the answers

What is a benefit of running services as user rather than kernel processes?

Increased security and reliability (B) Signup and view all the answers

What is the purpose of system calls in a computer system?

To provide a layer of abstraction between hardware and system programs (D) Signup and view all the answers

What is the result of having a micro kernel in an operating system?

A smaller kernel with minimum process and memory management (C) Signup and view all the answers

What is one of the primary functions of managing primary storage?

Allocating memory space for program execution (D) Signup and view all the answers

What is the main purpose of synchronizing the execution of cooperating processes?

To ensure integrity of shared data (C) Signup and view all the answers

What is an essential service provided by an operating system to manage files?

Managing secondary storage devices (A) Signup and view all the answers

What is the main goal of process protection in an operating system?

To prevent Processes from accessing memory space that does not belong to them (C) Signup and view all the answers

What is one of the key benefits of allowing simultaneous execution of processes?

Improved system responsiveness (B) Signup and view all the answers

What is an essential service provided by an operating system to manage directories?

Providing a user view of directory structure (D) Signup and view all the answers

What is the main purpose of deallocating disk space when files are removed?

To free up disk space for other files (D) Signup and view all the answers

What is the primary goal of providing a mechanism for users to protect their files and directories?

To ensure file and directory security (B) Signup and view all the answers

What is the primary responsibility of the OS in terms of file management?

Creating and deleting files and directories (C) Signup and view all the answers

What is the main purpose of a protection system in a computer system?

To control access to resources and prevent unauthorized access (B) Signup and view all the answers

What is a characteristic of a distributed system?

Each processor has its own local memory and clock (A) Signup and view all the answers

What is the primary function of a command-line interpreter in an operating system?

To read user commands and try to execute them (A) Signup and view all the answers

What is the benefit of a distributed system to the user?

Access to various resources maintained by the system (B) Signup and view all the answers

What is the purpose of backing up files in a file system?

To prevent data loss by storing files on stable storage media (B) Signup and view all the answers

What is a key challenge in designing a communication network for a distributed system?

Dealing with contention and security issues (D) Signup and view all the answers

What is the role of the kernel in some operating systems with respect to the command-line interpreter?

The kernel includes the command-line interpreter as part of its code (B) Signup and view all the answers

Study Notes

Operating System Responsibilities

Creating and deleting files and directories
Supporting primitives for file and directory manipulation
Mapping files onto secondary storage
Backing up files on stable storage media

Protection System

Controls access of programs, processes, or users to system resources
Necessary in multi-user systems with concurrent process execution

Distributed Systems

A collection of processors with local memory and clock, communicating through networks
Processors are connected through a communication network, requiring message routing and connection strategies
Distributed systems collect separate systems into a single coherent system, providing user access to resources

Command-Line Interpreter (Shells)

The interface between user and operating system
Reads user commands and executes them
Can be part of the kernel or a separate program (e.g., UNIX, Linux, DOS)

Operating System Services

Secondary Storage Management

Manage secondary storage devices
Allocate and deallocate disk space
Ensure no file overwriting and schedule disk requests

Primary Storage Management

Allocate and deallocate memory space for programs
Ensure process memory integrity and minimize unused space
Allow execution of large programs in limited memory

Process Management

Manage multiple cooperating processes
Synchronize access to shared data and communication
Prevent deadlocks and ensure data integrity

File and Directory Management

Allow user management of files and directories
Provide user-view of directory structure and file protection mechanism

Micro Kernels

Structured operating system with minimal kernel and user-level programs
Provides minimal process and memory management with communication facility
Easier to extend, port, and provide security and reliability (e.g., Mach, MacOS X Server, QNX, OS/2, Windows NT)

Virtual Machines

Conceptually, a layered system with hardware, kernel, system programs, and application programs
System programs can use system calls or hardware instructions
Application programs can call system programs

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Description

This quiz covers the role of an operating system in managing files and directories, including creating and deleting files, supporting primitives, and mapping files to storage.