Operating System Concepts and History

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What is the fundamental goal of computer systems?

To control I/O devices
To allocate hardware resources
To execute programs and make solving user problems easier (correct)
To develop application programs

What is a common function of an operating system?

To execute user programs only
To develop application programs
To construct hardware
To allocate resources and control I/O devices (correct)

What is a kernel in an operating system?

A type of middleware
The one program running at all times on the computer (correct)
A type of system program
A type of application program

What are system programs associated with?

The operating system (A) Signup and view all the answers

What is middleware in a mobile operating system?

A set of software frameworks that provide additional services to application developers (A) Signup and view all the answers

What features do Apple's iOS and Google's Android mobile operating systems have?

A core kernel along with middleware (A) Signup and view all the answers

What is the main function of an operating system in terms of computer resources?

To manage the computer system resources (A) Signup and view all the answers

What is the third objective of an operating system?

To permit the effective development, testing, and introduction of new system functions (C) Signup and view all the answers

What is the function of a device controller in a computer system?

To manage a specific type of device (B) Signup and view all the answers

What enables access between components and shared memory in a computer system?

Common bus (B) Signup and view all the answers

What is the purpose of middleware frameworks in an operating system?

To provide features and ease application development (A) Signup and view all the answers

What are the resources of a computer system?

Movement, storage, and processing of data (B) Signup and view all the answers

What is the primary function of a device controller?

To move data between the peripheral devices and local buffer storage (B) Signup and view all the answers

What ensures orderly access to the shared memory?

The memory controller (C) Signup and view all the answers

What triggers the device driver to give control to other parts of the operating system?

The interrupt sent by the device controller (C) Signup and view all the answers

What is the role of the device driver in relation to the device controller?

To understand the device controller and provide the operating system with a uniform interface (C) Signup and view all the answers

What happens when the device controller completes the transfer of data from the device to its local buffer?

It sends an interrupt to the device driver (B) Signup and view all the answers

What type of operation can the device driver return status information about?

Both read and write operations (B) Signup and view all the answers

What is the primary purpose of an interrupt?

To request for an I/O resource (C) Signup and view all the answers

What happens when the CPU is interrupted?

It stops what it is doing and immediately transfers execution to a fixed location (C) Signup and view all the answers

What is the purpose of the table of pointers to interrupt routines?

To provide the necessary speed for handling interrupts (A) Signup and view all the answers

Where is the table of pointers to interrupt routines usually stored?

In low memory (the first hundred locations) (C) Signup and view all the answers

What is the interrupt vector?

A table of pointers to interrupt routines (D) Signup and view all the answers

Why must interrupts be handled quickly?

Because they occur very frequently (B) Signup and view all the answers

What is the primary purpose of saving the state information of an interrupted process?

To ensure the interrupted computation resumes correctly (C) Signup and view all the answers

How does the CPU detect an interrupt request?

By sensing the interrupt-request line after executing every instruction (A) Signup and view all the answers

What is the purpose of the interrupt vector?

To serve as an index for the interrupt handler address (D) Signup and view all the answers

What is the last step executed by the interrupt handler?

Executing a return from interrupt instruction (B) Signup and view all the answers

What happens when the CPU detects an interrupt request?

It reads the interrupt number and jumps to the interrupt handler (C) Signup and view all the answers

Why must the interrupt routine explicitly save the current state?

To allow the interrupt routine to modify the processor state (B) Signup and view all the answers