Operating Systems Final

Front 1

System calls

Back 1

Functions provided by kernel

Front 2

Library calls

Back 2

Functions within program libraries

Front 3

Performance metrics used to compare scheduling algorithms

Back 3

Fairness, efficiency, throughput, turnaround time

Front 4

What is a Pipe

Back 4

Allows data redirection

Front 5

What is the TLB

Back 5

A cache that holds physical page numbers corresponding to virtual adresses

Front 6

How do we use TLB

Back 6

If the value refrences is mok not found in the TLB (miss), a fetch is done from page table in main memory.

Front 7

Goal/Benefits of virtual memory

Back 7

Virtual memory is larger than physical. Relies on OS rather than hardware.

Front 8

What is Critical section

Back 8

Part of code the modified shared variable.

Front 9

Why do we use static

Back 9

Static variables are only allocated one

Front 10

Name pipe files FIFO

Back 10

Can be used by multiple process not related, multiple readers, is not temporary connection.

Front 11

Dynamic loading

Back 11

Mapping an executable or library into a processs memory after it has started

Front 12

Dynamic linking

Back 12

Associates symbol names with addresses or offset after compile time.

Front 13

Mutual exclusion

Back 13

Prevents race condition

Front 14

Progress

Back 14

If no process is executing in its critical section & some process wish to enter their critical sections, then those processes not executing can decide which enters its critical section next. Not allowed to delay indefinitely.

Front 15

Bounded waiting

Back 15

Limit to how many times threads are allowed to enter their critical section. No process should wait infinitely.

Front 16

Signal vs interrupts

Back 16

Signal: communication btwn os kernel and OS process.

Interupts: communication between CPU and OS kernel.