OS · Concepts interview questions

1. A.a privileged CPU mode in which code may execute any instruction and access all hardware
2. B.an asynchronous signal from hardware that diverts the CPU to a handler routine
3. C.the module that gives CPU control to the process selected by the scheduler
4. D.a kernel keeping only minimal services in the kernel and running the rest as user processes

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1. A.Monolithic kernel
2. B.Spooling
3. C.Kernel mode
4. D.Trap

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1. A.Kernel mode — a restricted CPU mode in which a program cannot run privileged instructions directly
2. B.Kernel mode — a privileged CPU mode in which code may execute any instruction and access all hardware
3. C.Kernel mode — keeping several processes in memory so the CPU always has one ready to run
4. D.Kernel mode — the controlled interface through which a user program requests a service from the kernel

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1. A.the small program that loads the operating system kernel into memory at startup
2. B.a restricted CPU mode in which a program cannot run privileged instructions directly
3. C.the module that gives CPU control to the process selected by the scheduler
4. D.the controlled interface through which a user program requests a service from the kernel

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1. A.User mode
2. B.Dispatcher
3. C.Kernel mode
4. D.System call

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1. A.User mode — a restricted CPU mode in which a program cannot run privileged instructions directly
2. B.User mode — a kernel architecture running all OS services together in a single kernel address space
3. C.User mode — an asynchronous signal from hardware that diverts the CPU to a handler routine
4. D.User mode — keeping several processes in memory so the CPU always has one ready to run

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1. A.the controlled interface through which a user program requests a service from the kernel
2. B.an asynchronous signal from hardware that diverts the CPU to a handler routine
3. C.keeping several processes in memory so the CPU always has one ready to run
4. D.the module that gives CPU control to the process selected by the scheduler

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1. A.Monolithic kernel
2. B.Trap
3. C.Kernel mode
4. D.System call

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1. A.System call — buffering jobs like print tasks on disk so a slow device can process them at its own pace
2. B.System call — the controlled interface through which a user program requests a service from the kernel
3. C.System call — a feature letting devices transfer data to memory without involving the CPU for each byte
4. D.System call — a restricted CPU mode in which a program cannot run privileged instructions directly

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1. A.a synchronous software-generated exception caused by an instruction such as a system call or error
2. B.buffering jobs like print tasks on disk so a slow device can process them at its own pace
3. C.keeping several processes in memory so the CPU always has one ready to run
4. D.an asynchronous signal from hardware that diverts the CPU to a handler routine

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1. A.Spooling
2. B.Dispatcher
3. C.Interrupt
4. D.Multiprogramming

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1. A.Interrupt — an asynchronous signal from hardware that diverts the CPU to a handler routine
2. B.Interrupt — a privileged CPU mode in which code may execute any instruction and access all hardware
3. C.Interrupt — keeping several processes in memory so the CPU always has one ready to run
4. D.Interrupt — a synchronous software-generated exception caused by an instruction such as a system call or error

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1. A.a synchronous software-generated exception caused by an instruction such as a system call or error
2. B.a kernel keeping only minimal services in the kernel and running the rest as user processes
3. C.an asynchronous signal from hardware that diverts the CPU to a handler routine
4. D.a privileged CPU mode in which code may execute any instruction and access all hardware

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1. A.Trap
2. B.Bootloader
3. C.Multiprogramming
4. D.Direct Memory Access

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1. A.Trap — a kernel architecture running all OS services together in a single kernel address space
2. B.Trap — a synchronous software-generated exception caused by an instruction such as a system call or error
3. C.Trap — the small program that loads the operating system kernel into memory at startup
4. D.Trap — the module that gives CPU control to the process selected by the scheduler

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1. A.a synchronous software-generated exception caused by an instruction such as a system call or error
2. B.keeping several processes in memory so the CPU always has one ready to run
3. C.a kernel keeping only minimal services in the kernel and running the rest as user processes
4. D.a kernel architecture running all OS services together in a single kernel address space

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1. A.Interrupt
2. B.Monolithic kernel
3. C.Bootloader
4. D.Spooling

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1. A.Monolithic kernel — keeping several processes in memory so the CPU always has one ready to run
2. B.Monolithic kernel — the controlled interface through which a user program requests a service from the kernel
3. C.Monolithic kernel — a kernel architecture running all OS services together in a single kernel address space
4. D.Monolithic kernel — a kernel keeping only minimal services in the kernel and running the rest as user processes

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1. A.the controlled interface through which a user program requests a service from the kernel
2. B.a kernel keeping only minimal services in the kernel and running the rest as user processes
3. C.a kernel architecture running all OS services together in a single kernel address space
4. D.a feature letting devices transfer data to memory without involving the CPU for each byte

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1. A.Microkernel
2. B.Interrupt
3. C.Dispatcher
4. D.Kernel mode

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1. A.Microkernel — a restricted CPU mode in which a program cannot run privileged instructions directly
2. B.Microkernel — a kernel architecture running all OS services together in a single kernel address space
3. C.Microkernel — a kernel keeping only minimal services in the kernel and running the rest as user processes
4. D.Microkernel — a privileged CPU mode in which code may execute any instruction and access all hardware

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1. A.the small program that loads the operating system kernel into memory at startup
2. B.a kernel keeping only minimal services in the kernel and running the rest as user processes
3. C.a feature letting devices transfer data to memory without involving the CPU for each byte
4. D.a restricted CPU mode in which a program cannot run privileged instructions directly

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1. A.Bootloader
2. B.User mode
3. C.Dispatcher
4. D.Trap

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1. A.Bootloader — the controlled interface through which a user program requests a service from the kernel
2. B.Bootloader — a kernel architecture running all OS services together in a single kernel address space
3. C.Bootloader — a feature letting devices transfer data to memory without involving the CPU for each byte
4. D.Bootloader — the small program that loads the operating system kernel into memory at startup

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1. A.buffering jobs like print tasks on disk so a slow device can process them at its own pace
2. B.a kernel architecture running all OS services together in a single kernel address space
3. C.a feature letting devices transfer data to memory without involving the CPU for each byte
4. D.an asynchronous signal from hardware that diverts the CPU to a handler routine

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1. A.Dispatcher
2. B.Trap
3. C.Interrupt
4. D.Direct Memory Access

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1. A.Direct Memory Access — keeping several processes in memory so the CPU always has one ready to run
2. B.Direct Memory Access — the controlled interface through which a user program requests a service from the kernel
3. C.Direct Memory Access — a feature letting devices transfer data to memory without involving the CPU for each byte
4. D.Direct Memory Access — an asynchronous signal from hardware that diverts the CPU to a handler routine

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1. A.the controlled interface through which a user program requests a service from the kernel
2. B.a feature letting devices transfer data to memory without involving the CPU for each byte
3. C.a kernel architecture running all OS services together in a single kernel address space
4. D.buffering jobs like print tasks on disk so a slow device can process them at its own pace

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1. A.Spooling
2. B.Interrupt
3. C.User mode
4. D.Monolithic kernel

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1. A.Spooling — the module that gives CPU control to the process selected by the scheduler
2. B.Spooling — a privileged CPU mode in which code may execute any instruction and access all hardware
3. C.Spooling — buffering jobs like print tasks on disk so a slow device can process them at its own pace
4. D.Spooling — a kernel keeping only minimal services in the kernel and running the rest as user processes

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