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Questions and Answers
What is the main function of an operating system?
What is the main function of an operating system?
Which component is responsible for moving data directly between memory and an I/O device?
Which component is responsible for moving data directly between memory and an I/O device?
What does the storage hierarchy refer to in a computer system?
What does the storage hierarchy refer to in a computer system?
In which mode does the operating system execute most of the code?
In which mode does the operating system execute most of the code?
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What is the purpose of process management in an operating system?
What is the purpose of process management in an operating system?
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Which aspect of the operating system focuses on ensuring data security and access control?
Which aspect of the operating system focuses on ensuring data security and access control?
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Study Notes
Computer System
- A computer system consists of hardware and software components
Von Neumann Architecture
- It is a design model for computer architecture
- It consists of a central processing unit (CPU), memory, and input/output (I/O) devices
Operating System Definition
- An operating system (OS) is a set of software that manages computer hardware resources and provides common services to computer programs
- It acts as an intermediary between computer hardware and user-level applications
Computer System Operation
- The operating system manages the allocation and deallocation of system resources such as memory, CPU time, and storage
- It provides common services such as process scheduling, memory management, and I/O management
Components of a Modern OS
- Process management: creating and managing processes
- Memory management: allocating and deallocating memory
- File systems: managing files and directories
- I/O management: managing input/output operations
- Security: controlling access to system resources
Interrupt Handling
- Interrupts are events that occur outside of regular program execution
- Interrupt handling involves saving the current state of the program, determining the cause of the interrupt, and taking appropriate action
I/O Structure
- I/O devices can be categorized into block devices (e.g., disks) and character devices (e.g., keyboards)
- I/O operations can be performed using programmed I/O, interrupt-driven I/O, or direct memory access (DMA)
Storage Structure
- The storage hierarchy consists of primary storage (main memory), secondary storage (disks), and tertiary storage (tapes)
- Caching is a technique used to improve performance by storing frequently accessed data in faster, more expensive memory
Computer-System Architecture
- Computer systems can be categorized into single-processor systems, multiprocessor systems, and clustered systems
- Clustered systems consist of multiple computers connected together to achieve a common goal
Operating System Structure
- The operating system can be structured into a monolithic system, microkernel, or hybrid
- The operating system provides a set of system calls that can be used by applications to interact with the operating system
Operating System Operation
- The operating system operates in two modes: user mode and kernel mode
- Transition from user mode to kernel mode occurs when a system call is made or an interrupt occurs
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Description
Test your knowledge on operating system topics such as Von Neumann architecture, components of a modern OS, interrupt handling, and I/O structure. This quiz covers basic concepts and functions of operating systems.
