OSCO_Chapter_2

What are the three objectives of OS design?

• convenience, efficiency, ability to evolve

• performance, efficiency, ability to evolve

• convenience, efficiency, performance

• convenience, security, ability to evolve

What is true about the kernel of an OS?

• Permanently in memory, kernel mode, includes only OS as process

• Permanently in memory, user mode, includes most heavily used parts of software

• Permanently in memory, kernel mode, includes most heavily used parts of software

What attributes can be associated with multiprogramming?

• Applied to single processors

• Interleaved execution

• Only one process can be in ready / running state at the same time

• Can access multiple processors for concurrent process execution

What is a process not?

• A program that is not in (virtual) memory

• Controlled and scheduled by an operating system

• A scheduling algorithm

• A program that is in (virtual) memory

How is the execution context of a process used by the OS?

(The execution context is the internal data which the OS uses to supervise + control a process)

• Managing process and processor

• It holds the registers

• Holds information, such as "waiting for I/O" or "priority of process"

• All answers are correct

What is the most detailed description about storage management by the OS?

• Process Isolation, automatic allocation and management, protection + access control, long term storage

• Process Isolation, automatic allocation and management, supports modular programming, protection + access control, short term storage

• Process Isolation, automatic allocation and management, supports modular programming, protection

• Process Isolation, automatic allocation and management, supports modular programming, protection + access control, long term storage

What is time slicing?

• Processor time is split into quanta, processes get quanta in a round robin style

• Processor time is split into quanta, when a quanta runs out, the OS gains control. After the OS is done, it returns control to the process (FIFO)

What does not describe an aspect of the round robin scheduling

• FIFO

• Processes are activated in a fixed cyclic order

• All processes are in a doubly linked list

• A blocked process returns control to the scheduler when called upon.

What kernel does Windows use?

• Monolithic kernel

• Microkernel

What is true about monolithic kernels?

• Entire OS services work in kernel space

• Fast

• Failure in one component will affect entire system

• Difficult to add functionality

• Small