Operating Systems · Unit 2
Operating System Structures
Exam-focused notes for Operating System Structures (Operating Systems, BIT204): what the TU syllabus asks and how it has actually been tested, with 6 solved past questions from this unit.
What this unit covers
- Monolithic kernel structure
- Microkernel structure
- Kernel definition and role
- System call definition and objectives
- System call process and mechanism
- Interrupt definition and occurrence
System call definition and objectives
Define system call? What are its objectives? [5]
A system call is a programmatic way in which a computer program requests a service from the kernel of the operating system. It provides an interface between a user-level process and the operating system, allowing user programs to request OS services that re...
Full solved answer →What is system call? Explain the system call process in detail. [5]
A system call is a programmatic way in which a user-level program requests a service from the operating system kernel. It provides an interface between a running process (user space) and the operating system (kernel space). System calls allow user programs ...
Full solved answer →Define system call. Explain operating system as a extended machine. [5]
--- A system call is a programmatic interface through which a user-level program requests a service from the operating system kernel. It provides a controlled entry point into the kernel, allowing user programs to perform privileged operations (such as file...
Full solved answer →Interrupt definition and occurrence
Define interrupt. Describe about device controller. [2+3]
--- An interrupt is a signal sent to the CPU by hardware or software indicating that an event needs immediate attention. When an interrupt occurs, the CPU suspends its current execution, saves its state, and transfers control to a special routine called the...
Full solved answer →System call process and mechanism
What is kernel? Explain the process of system call with suitable diagram.[10]
The kernel is the core component of an operating system that acts as a bridge between application programs and the computer hardware. It is the first program loaded into memory when the computer starts (after the bootloader) and remains in memory throughout...
Full solved answer →Kernel definition and role
What is kernel? Differentiate between monolithic and microkernel structure. [5]
The kernel is the core component of an operating system that acts as a bridge between application software and computer hardware. It manages system resources such as CPU, memory, and I/O devices, and provides essential services to all other parts of the OS....
Full solved answer →Make Unit 2 stick
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