Operating System Quiz

An _____________ is a program that acts as an intermediary between a user of a computer and the computer hardware

• interrupt vector

• Bootstrap program

• Kernel

• OS

Answer explanation

An OS (Operating System) is the software that acts as an intermediary between users and computer hardware, managing resources and providing a user interface, making it the correct answer to the question.

_____________ is the one program running at all times on the computer

• Kernel

• Control program

• Bootstrap program

• interrupt vector

Answer explanation

The kernel is the core component of an operating system, managing system resources and communication between hardware and software. It is the only program that runs continuously, making it the correct answer.

_____________ is loaded at power-up or reboot

• interrupt vector

• Control program

• Bootstrap program

• Kernel

Answer explanation

The bootstrap program is the first code that runs when a computer is powered on or rebooted. It initializes the system and loads the operating system into memory, making it the correct answer.

Device controllers inform CPU that it is finished without operation by causing an _____________

• interrupt vector

• Bootstrap program

• Kernel

• Control program

Answer explanation

Device controllers signal the CPU that they have completed their tasks by generating an interrupt. This interrupt is managed through an interrupt vector, which directs the CPU to the appropriate handler for the event.

_____________ is a software generated interrupt caused by error or user request

• Trap

• OS

• Bootstrap program

• interrupt vector

Answer explanation

A 'Trap' is a software-generated interrupt that occurs due to an error or a user request, making it the correct choice. Other options like 'Control program' and 'OS' do not specifically refer to interrupts.

_____________ is request to the operating system to allow user to wait for I/O completion

• System call

• Control program

• Bootstrap program

• OS

Answer explanation

A system call is a mechanism that allows a program to request services from the operating system, including waiting for I/O operations to complete. This makes 'System call' the correct answer.

Computer system: Hardware ↔ OS ↔ Applications ↔ _____________ (↔ = 'uses’)

• Users

• Shell

• Kernel

• Mouse

Answer explanation

The interrupt vector is a data structure used by the OS to handle interrupts. It connects hardware and the OS, making it the correct choice to complete the sequence, as it directly relates to how applications interact with the OS.

OS acts as _____________ that decides between conflicting requests for efficient and fair resource use

• Interface

• Bootstrap program

• Control program

• Resource Manager

Answer explanation

The kernel is the core component of an operating system (OS) that manages system resources and handles requests from applications, ensuring efficient and fair resource allocation. Thus, the correct answer is 'Kernel'.

OS acts as _____________ that controls execution of programs to prevent errors and improper use of computer

• resource manager

• Control program

• Bootstrap program

• Kernel

Answer explanation

The OS acts as a control program that manages the execution of programs, ensuring they run correctly and securely. This prevents errors and misuse, making 'Control program' the correct choice.

Interrupt transfers control to the interrupt service routine generally, through the _____________, which contains the addresses of all the service routines

• Bootstrap program

• OS

• interrupt vector

• Control program

Answer explanation

The correct answer is 'interrupt vector' because it is a data structure that holds the addresses of all interrupt service routines, allowing the system to transfer control to the appropriate routine when an interrupt occurs.