Operating System Exam
1 polling 2 vectored interrupt system
What are the two type of interrupts
Asymmetric Multiprocessing Symmetric Multiprocessing
What are the two types of Multiprocessors?
It is like multiprocessing system but multiple system working together. Share storage via a storage-area network (SAN) provides high availability service which survives failures.
What is a clustered system
1 interrupt transfers control to the interrupt service routine generally, through the interrupt vector, which contains the addresses of all service routines. 2 Interrupt architecture must save the address of the interrupted instruction. 3 Incoming interrupts are disabled while another interrupt is being processed to prevent a lost interrupt.
Common function of interrupts
Speed Cost Volatility
How does storage systems organized hierarchy?
1 the operating system preserves the state of the CPU by storing registers and the program counter. 2 Determines which type of interrupt has occurred. 3 separate segments of code determine what action should be taken for each type of interrupt.
How to handle interrupt?
Yes
Is an operating system interrupt driven?
registers cache main memory electronic device magnetic device optical device magnetic tapes
List Storage-Device Hierarchy
Controls execution of programs to prevent errors and improper use of the computer.
OS is a control program
Manages all resources Decides between conflicting requests for efficient and fair resource use.
Os is a resource allocator
Increased throughput Economy scale Increased reliability - graceful degradation or fault tolerance
What are the advantage of Multiprocessor system?
It is a software generated interrupts.
What is a trap
Execute user programs and make solving user problems easier. Make the computer system convenient to use Use the computer hardware in an efficient manner.
What is an Operating System
a program that acts as an intermediary between a user of a computer and the computer hardware.
What is an Operating System
copying information into faster storage system; main memory can be viewed as a last cache for secondary storage.
What is caching?
is loaded at power-up or reboot stored in ROM or EPROM generally known as firmware.
bootstrap program
Hardware Operating System Application programs Users
four components of computer system
