Paging and Thrasing in OS

What is the primary purpose of paging in operating systems?

• To divide a process into smaller segments.

• To allow non-contiguous allocation of physical memory.

• To protect the operating system from user processes.

• 1. To improve CPU utilization by reducing context switching.

In paging, the logical address space of a process is divided into fixed-size units called:

• Segments

• Frames

• Pages

• 1. Blocks

In paging, the main memory will also be divided in the form of:

• Segments

• Frames

• Pages

A page table is used to:

• Store the contents of each page.

• 1. Handle I/O operations for each page.

• Manage the CPU scheduling of processes.

• 1. Translate logical addresses to physical addresses.

What is a "page fault"?

• An error that occurs when a page table is corrupted.

• When the CPU attempts to access a page that is not currently in physical memory.

• The process of swapping a page out of memory.

• 1. A security violation related to memory access.

Thrashing occurs when ______.

• Swapping happens very frequently at a higher rate, and then the operating system has to spend more time swapping these pages.

• Executing user processes.

• Performing I/O operations unrelated to paging.

• 1. Waiting for user input.

It occurs when a program attempts to access data or code in its address space but is not currently located in the system RAM.

• Swapping

• Thrash

• Page Fault

• Cache Disable

A process in mapping wherein, in each time the address is generated, the value of the page table base is added to the page number to get the actual location of the page entry in the table.

• Generation of logical address

• Generation of physical address

• Scaling

• Getting actual frame number.

Whenever a page fault happens, the operating system will try to fetch that page from secondary memory and try to swap it with one of the pages in RAM.

• Referenced

• Page fault

• Swapping

• Modified

Which of the following is a strategy to eliminate thrashing?

• Increase the degree of multiprogramming.

• Reduce the amount of physical memory.

• Replace the program that uses less memory.

• 1. Increase the applications running.