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Questions and Answers
What is the primary function of a micro kernel in an operating system?
What is the primary function of a micro kernel in an operating system?
What is a benefit of using a micro kernel approach in operating system design?
What is a benefit of using a micro kernel approach in operating system design?
Which of the following operating systems is NOT an example of a microkernel-based operating system?
Which of the following operating systems is NOT an example of a microkernel-based operating system?
What is a characteristic of system programs in a computer system?
What is a characteristic of system programs in a computer system?
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What is a result of having a smaller kernel in a micro kernel approach?
What is a result of having a smaller kernel in a micro kernel approach?
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What is a benefit of running services as user rather than kernel processes?
What is a benefit of running services as user rather than kernel processes?
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What is the purpose of system calls in a computer system?
What is the purpose of system calls in a computer system?
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What is the result of having a micro kernel in an operating system?
What is the result of having a micro kernel in an operating system?
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What is one of the primary functions of managing primary storage?
What is one of the primary functions of managing primary storage?
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What is the main purpose of synchronizing the execution of cooperating processes?
What is the main purpose of synchronizing the execution of cooperating processes?
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What is an essential service provided by an operating system to manage files?
What is an essential service provided by an operating system to manage files?
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What is the main goal of process protection in an operating system?
What is the main goal of process protection in an operating system?
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What is one of the key benefits of allowing simultaneous execution of processes?
What is one of the key benefits of allowing simultaneous execution of processes?
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What is an essential service provided by an operating system to manage directories?
What is an essential service provided by an operating system to manage directories?
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What is the main purpose of deallocating disk space when files are removed?
What is the main purpose of deallocating disk space when files are removed?
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What is the primary goal of providing a mechanism for users to protect their files and directories?
What is the primary goal of providing a mechanism for users to protect their files and directories?
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What is the primary responsibility of the OS in terms of file management?
What is the primary responsibility of the OS in terms of file management?
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What is the main purpose of a protection system in a computer system?
What is the main purpose of a protection system in a computer system?
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What is a characteristic of a distributed system?
What is a characteristic of a distributed system?
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What is the primary function of a command-line interpreter in an operating system?
What is the primary function of a command-line interpreter in an operating system?
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What is the benefit of a distributed system to the user?
What is the benefit of a distributed system to the user?
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What is the purpose of backing up files in a file system?
What is the purpose of backing up files in a file system?
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What is a key challenge in designing a communication network for a distributed system?
What is a key challenge in designing a communication network for a distributed system?
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What is the role of the kernel in some operating systems with respect to the command-line interpreter?
What is the role of the kernel in some operating systems with respect to the command-line interpreter?
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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.