D386 Exam Practice–Questions Solved 100%
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What hardware component is responsible for storing data and instructions that are
actively being processed by the CPU?
Registers and CPU Cache
Describe the function of a motherboard.
Provides connectivity and houses essential components
What is the purpose of using CPU cache memory?
To increase the speed of data access between the CPU and RAM
What is the primary function of CPU registers?
To store data and instructions currently being processed
What is the purpose of a GPU in a computer system?
Processing graphics and visuals
What is the difference between HDD and SSD storage?
HDDs have moving parts, while SSDs are solid-state.
How does cache memory improve CPU performance?
By storing frequently accessed data closer to the CPU
How does RAID improve data storage reliability?
By mirroring or striping data across multiple drives
Which type of cache is located closest to the CPU core and operates at the highest
speed?
L1 Cache
How does an operating system handle process synchronization?
By allowing processes to communicate with each other
In a multitasking operating system, what role does the scheduler play?
,It determines the order in which processes are executed on the CPU
Describe the difference between preemptive and non-preemptive scheduling.
Preemptive scheduling allows a higher priority task to interrupt a lower priority task,
while non-preemptive scheduling does not.
Explain the difference between multiprogramming and multiprocessing.
Multiprogramming allows multiple processes to run simultaneously on a single
processor, while multiprocessing involves multiple processors.
Describe the role of device drivers in an operating system.
Facilitates communication between the operating system and hardware devices
What is a shell, and how does it interact with the operating system?
Interface between the user and the operating system; interprets commands and
executes them
Which component of the operating system manages communication between
hardware and software components?
Kernal
Which component of the operating system is responsible for managing hardware
peripherals and providing a uniform interface for application programs?
Device Drivers
What is a file system, and what are its main functions?
Organizes and stores files on storage devices; provides methods for accessing and
manipulating files
What is the purpose of system calls in an operating system?
Facilitates communication between processes
What is the primary function of an operating system kernel?
To manage system resources and provide essential services
Explain the concept of virtualization in operating systems.
Simulating hardware and creating virtual environments
What is the difference between a kernel and a user-space process?
, Kernel is the core of the operating system, while user-space processes are applications
running outside the kernel.
What happens if a device driver is incompatible with the operating system?
The device associated with the incompatible driver may not function properly
Which component of the operating system is responsible for managing memory
resources and allocating them to running processes?
Memory Manager
What role does the boot loader play in the booting process of an operating system?
It transfers control to the operating system kernel after the hardware is initialized
Describe the difference between process and thread.
A process is a program in execution, while a thread is a segment of a process.
How does the operating system handle hardware interrupts?
By invoking the appropriate interrupt handler to respond to the event
What is virtual memory, and how does it work?
Memory allocated by the operating system when physical RAM is full; uses disk space as
an extension of RAM
Explain the purpose of an operating system scheduler.
Manages system processes and resources
Explain the difference between a type 1 and a type 2 hypervisor.
Type 1 hypervisor runs directly on the host's hardware, while type 2 hypervisor runs on
a host operating system.
What is hypervisor passthrough, and how does it enhance virtualization performance?
Hypervisor passthrough allows virtual machines to directly access physical hardware
components, bypassing the hypervisor; it improves performance by reducing overhead.
What are the security implications of virtualization?
Virtualization increases security risks due to the sharing of resources between virtual
machines.
How does virtualization help in disaster recovery scenarios?
Correct| Verified Solutions Guaranteed Rated A+
Pass- Newest Update 2025
What hardware component is responsible for storing data and instructions that are
actively being processed by the CPU?
Registers and CPU Cache
Describe the function of a motherboard.
Provides connectivity and houses essential components
What is the purpose of using CPU cache memory?
To increase the speed of data access between the CPU and RAM
What is the primary function of CPU registers?
To store data and instructions currently being processed
What is the purpose of a GPU in a computer system?
Processing graphics and visuals
What is the difference between HDD and SSD storage?
HDDs have moving parts, while SSDs are solid-state.
How does cache memory improve CPU performance?
By storing frequently accessed data closer to the CPU
How does RAID improve data storage reliability?
By mirroring or striping data across multiple drives
Which type of cache is located closest to the CPU core and operates at the highest
speed?
L1 Cache
How does an operating system handle process synchronization?
By allowing processes to communicate with each other
In a multitasking operating system, what role does the scheduler play?
,It determines the order in which processes are executed on the CPU
Describe the difference between preemptive and non-preemptive scheduling.
Preemptive scheduling allows a higher priority task to interrupt a lower priority task,
while non-preemptive scheduling does not.
Explain the difference between multiprogramming and multiprocessing.
Multiprogramming allows multiple processes to run simultaneously on a single
processor, while multiprocessing involves multiple processors.
Describe the role of device drivers in an operating system.
Facilitates communication between the operating system and hardware devices
What is a shell, and how does it interact with the operating system?
Interface between the user and the operating system; interprets commands and
executes them
Which component of the operating system manages communication between
hardware and software components?
Kernal
Which component of the operating system is responsible for managing hardware
peripherals and providing a uniform interface for application programs?
Device Drivers
What is a file system, and what are its main functions?
Organizes and stores files on storage devices; provides methods for accessing and
manipulating files
What is the purpose of system calls in an operating system?
Facilitates communication between processes
What is the primary function of an operating system kernel?
To manage system resources and provide essential services
Explain the concept of virtualization in operating systems.
Simulating hardware and creating virtual environments
What is the difference between a kernel and a user-space process?
, Kernel is the core of the operating system, while user-space processes are applications
running outside the kernel.
What happens if a device driver is incompatible with the operating system?
The device associated with the incompatible driver may not function properly
Which component of the operating system is responsible for managing memory
resources and allocating them to running processes?
Memory Manager
What role does the boot loader play in the booting process of an operating system?
It transfers control to the operating system kernel after the hardware is initialized
Describe the difference between process and thread.
A process is a program in execution, while a thread is a segment of a process.
How does the operating system handle hardware interrupts?
By invoking the appropriate interrupt handler to respond to the event
What is virtual memory, and how does it work?
Memory allocated by the operating system when physical RAM is full; uses disk space as
an extension of RAM
Explain the purpose of an operating system scheduler.
Manages system processes and resources
Explain the difference between a type 1 and a type 2 hypervisor.
Type 1 hypervisor runs directly on the host's hardware, while type 2 hypervisor runs on
a host operating system.
What is hypervisor passthrough, and how does it enhance virtualization performance?
Hypervisor passthrough allows virtual machines to directly access physical hardware
components, bypassing the hypervisor; it improves performance by reducing overhead.
What are the security implications of virtualization?
Virtualization increases security risks due to the sharing of resources between virtual
machines.
How does virtualization help in disaster recovery scenarios?
