Paging and Segmentation: Master Memory Management Techniques

Question 1

Which function is not performed by a memory management unit (MMU)?

Accepted Answer

Process scheduling

Answer

Address translation

Answer

Memory protection

Answer

Cache management

Question 2

Which technique combines multiple page frames into a single block to reduce external fragmentation?

Accepted Answer

Buddy allocation

Answer

Slab allocation

Answer

Bitmap allocation

Answer

Compaction

Question 3

Which operating system primarily utilizes segmentation?

Accepted Answer

Unix

Answer

Windows

Answer

Linux

Answer

Mac OS

Question 4

What benefit does virtual memory provide?

Accepted Answer

Increased memory capacity

Answer

Improved performance

Answer

Reduced memory fragmentation

Answer

Enhanced security

Question 5

When a page fault occurs in a paged memory system, what action does the operating system usually take?

Accepted Answer

Bring the needed page into memory from storage.

Answer

End the process that caused the fault.

Answer

Expand the page table.

Answer

Take memory from other processes to make room for the needed page.

Question 6

In a paged memory management system, what is the purpose of a page table?

Accepted Answer

To map virtual addresses to physical addresses

Answer

To store the contents of a page in memory

Answer

To manage the allocation and deallocation of pages

Answer

To control access to pages

Question 7

In a segmented memory management system, what is the difference between a segment and a segment descriptor?

Accepted Answer

A segment is the logical unit of memory allocation, while a segment descriptor is a table entry that describes the segment.

Answer

A segment is the physical unit of memory allocation, while a segment descriptor is a logical table entry that describes the segment.

Answer

There is no difference between a segment and a segment descriptor.

Answer

A segment descriptor is the logical unit of memory allocation, while a segment is a table entry that describes the segment descriptor.

Question 8

Which of the following is a key difference between demand paging and prepaging?

Accepted Answer

Demand paging loads pages into memory only when they are needed, while prepaging loads pages into memory before they are needed.

Answer

Demand paging is more efficient than prepaging.

Answer

Prepaging is more efficient than demand paging.

Answer

There is no difference between demand paging and prepaging.

Question 9

What is the purpose of a page fault?

Accepted Answer

To indicate that the requested page is not currently in memory

Answer

To indicate that the requested page is corrupted

Answer

To indicate that the requested page is protected

Answer

To indicate that the requested page is locked

Question 10

Which of the following is NOT a benefit of using a Least Recently Used (LRU) page replacement algorithm?

Accepted Answer

It is optimal in all cases

Answer

It is simple to implement

Answer

It can effectively reduce page faults

Answer

It treats all pages fairly

Question 11

What is the role of a Translation Lookaside Buffer (TLB) in paging?

Accepted Answer

To cache recently used page table entries for faster access

Answer

To translate virtual addresses to physical addresses

Answer

To manage the allocation and deallocation of pages

Answer

To protect pages from unauthorized access

Question 12

Which of the following is NOT a type of memory protection mechanism used in operating systems?

Accepted Answer

Address translation

Answer

Base and limit registers

Answer

Memory segmentation

Answer

Paging

Question 13

In a segmentation scheme, what is the primary purpose of a segment table?

Accepted Answer

To keep track of the starting address and length of each segment

Answer

To translate virtual addresses to physical addresses

Answer

To store the program's code and data

Answer

To manage page faults

Question 14

In a demand paging system, a page fault occurs when a program:

Accepted Answer

References a page that is not currently in memory

Answer

Replaces a page with a newer version

Answer

Updates the page table

Answer

Terminates due to a program error

Question 15

Which of the following page replacement algorithms follows the 'First In, First Out' principle?

Accepted Answer

First In, First Out (FIFO)

Answer

Least Recently Used (LRU)

Answer

Most Recently Used (MRU)

Answer

Least Frequently Used (LFU)

Question 16

What is the main purpose of a TLB (Translation Lookaside Buffer)?

Accepted Answer

To translate virtual addresses to physical addresses without accessing the page table

Answer

To cache frequently used page table entries

Answer

To prevent page faults from occurring

Answer

To manage memory allocation

Question 17

In a segmented memory system, which mechanism is primarily responsible for protecting memory?

Accepted Answer

Memory bounds checking

Answer

Paging

Answer

Segmentation

Answer

Virtualization

Question 18

In a paging system, which of the following is responsible for mapping virtual addresses to physical addresses?

Accepted Answer

Page table

Answer

Segmentation table

Answer

Cache

Answer

Base register

Question 19

In a segmentation system, what is the name of the register that stores the base address of the current segment being accessed?

Accepted Answer

Segment base register

Answer

Stack pointer register

Answer

Instruction pointer register

Answer

Page table register

Question 20

What is the smallest unit of memory that can be allocated in a paging system?

Accepted Answer

Page

Answer

Block

Answer

Segment

Answer

Frame

Question 21

In a segmentation system, what is the name of the table that stores the base addresses and sizes of each segment?

Accepted Answer

Segmentation table

Answer

Directory table

Answer

Translation lookaside buffer

Answer

Page table

Question 22

In a paging system, what is the process of bringing a page from secondary storage into main memory called?

Accepted Answer

Page fault

Answer

Page hit

Answer

Page swap

Answer

Page transfer