Memory Management in Operating Systems Quizzes - Master Computer Science (MSc)

Question 1

Which of the following is NOT a page replacement algorithm?

Accepted Answer

Most Frequently Used (MFU)

Answer

Least Recently Used (LRU)

Answer

First-In First-Out (FIFO)

Answer

Least Frequently Used (LFU)

Question 2

Which of the following is NOT a primary goal of memory management in operating systems?

Accepted Answer

Increasing CPU utilization

Answer

Efficient allocation and release of memory resources

Answer

Protection of processes' memory spaces

Answer

Preventing memory leaks

Question 3

What is the primary purpose of a page fault?

Accepted Answer

To alert the operating system that a process requires access to a page that is currently not loaded in physical memory

Answer

To allocate a new page to a process

Answer

To release a page that is no longer required

Answer

To protect a page from being accessed by other processes

Question 4

Which page replacement algorithm prioritizes replacing the page with the fewest recent references?

Accepted Answer

Least Recently Used (LRU)

Answer

Most Recently Used (MRU)

Answer

Optimal Page Replacement

Answer

First In First Out (FIFO)

Question 5

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

Accepted Answer

Caching recently translated virtual addresses

Answer

Managing page tables

Answer

Performing address translation

Answer

Preventing memory leaks

Question 6

Which memory allocation technique assigns a fixed amount of memory to a process during compile time?

Accepted Answer

Static allocation

Answer

Dynamic allocation

Answer

Stack allocation

Answer

Heap allocation

Question 7

What is the fundamental difference between logical and physical addresses?

Accepted Answer

Logical addresses are virtual, while physical addresses are concrete

Answer

Physical addresses are virtual, while logical addresses are concrete

Answer

Logical addresses are processed by the CPU, while physical addresses are processed by memory

Answer

Physical addresses are processed by the CPU, while logical addresses are processed by memory

Question 8

What is the primary function of a memory management unit (MMU)?

Accepted Answer

Translating virtual addresses to physical addresses

Answer

Managing page tables

Answer

Detecting and handling memory faults

Answer

Allocating and releasing memory

Question 9

What is the key difference between internal and external fragmentation in memory management?

Accepted Answer

Internal fragmentation occurs within allocated memory blocks, while external fragmentation occurs between allocated blocks

Answer

Internal fragmentation occurs between allocated memory blocks, while external fragmentation occurs within allocated blocks

Answer

Both internal and external fragmentation occur within allocated memory blocks

Answer

Both internal and external fragmentation occur between allocated memory blocks

Question 10

Which of the following is a primary purpose of memory protection mechanisms in operating systems?

Accepted Answer

Preventing unauthorized processes from accessing or modifying memory

Answer

Ensuring that memory is allocated efficiently to different processes

Answer

Improving the performance of virtual memory systems

Answer

Reducing the chances of system crashes due to memory errors

Question 11

What is the main advantage of using a Buddy Memory Allocation algorithm?

Accepted Answer

It ensures that memory blocks are always allocated in powers of two, minimizing fragmentation

Answer

It provides faster memory allocation and deallocation operations

Answer

It supports dynamic memory allocation, allowing processes to request and release memory as needed

Answer

It is particularly suitable for real-time systems requiring predictable memory access times

Question 12

Which of the following is NOT a real-mode addressing limitation?

Accepted Answer

Support for virtual memory

Answer

16-bit addresses

Answer

1 MB memory limit

Answer

No memory protection

Question 13

In multiprocessor systems, what's the primary goal of cache coherence protocols?

Accepted Answer

Ensure a consistent view of shared memory across multiple processors

Answer

Minimize cache misses

Answer

Prevent deadlocks

Answer

Optimize data transfer between caches and main memory

Question 14

What is the primary distinction between segmentation and paging memory management schemes?

Accepted Answer

Segmentation groups related data, while paging manages data in fixed-sized units.

Answer

Paging groups related data, while segmentation manages data in fixed-sized units.

Answer

Segmentation is hardware-based, while paging is software-based.

Answer

Paging is hardware-based, while segmentation is software-based.

Question 15

What is the fundamental purpose of a page table in memory management?

Accepted Answer

Translating virtual addresses into their physical counterparts

Answer

Managing the allocation and release of physical pages

Answer

Tracking pages currently in use

Answer

Storing the content of recently accessed pages

Question 16

What is the role of a garbage collector in memory management?

Accepted Answer

Recovering memory that is no longer in use

Answer

Allocating memory to new objects

Answer

Managing the page table

Answer

Handling page faults

Question 17

Which of the following is a primary advantage of virtual memory management techniques?

Accepted Answer

Increased effective memory capacity

Answer

Improved overall system performance

Answer

Reduced security vulnerabilities

Answer

Elimination of memory fragmentation

Question 18

What is the primary purpose of a page table in a virtual memory system?

Accepted Answer

To map virtual addresses to their corresponding physical addresses

Answer

To store information about page replacement history

Answer

To manage the allocation and deallocation of memory pages

Answer

To enforce memory protection mechanisms

Question 19

What is the main objective of a garbage collector in the context of memory management?

Accepted Answer

To reclaim unused memory and prevent memory leaks

Answer

To enhance the performance of running programs

Answer

To handle memory protection and access control

Answer

To reduce the occurrence of memory fragmentation

Question 20

What is the fundamental difference between explicit and implicit memory management approaches?

Accepted Answer

In explicit management, the programmer manually allocates and deallocates memory, while implicit management is handled automatically by the system.

Answer

Implicit management is more efficient than explicit management.

Answer

Explicit management provides better performance than implicit management.

Answer

Implicit management is only supported in modern operating systems.

Question 21

In a paging system, what is the fundamental unit of memory allocation?

Accepted Answer

Page

Answer

Frame

Answer

Block

Answer

Segment

Question 22

Which memory protection mechanism involves dividing memory into segments with different access permissions?

Accepted Answer

Segmentation

Answer

Paging

Answer

Virtualization

Answer

Cache coherence

Question 23

Which memory management technique divides physical memory into fixed-size blocks called pages, allowing the operating system to manage memory more efficiently?

Accepted Answer

Paging

Answer

Segmentation

Answer

Base and Bounds

Answer

Swapping

Question 24

What is the main purpose of utilizing a Translation Lookaside Buffer (TLB) in a computer system?

Accepted Answer

To cache recently used virtual-to-physical address translations, improving memory access speed

Answer

To handle page faults

Answer

To store the process page tables

Question 25

Which memory management strategy divides physical memory into variable-sized blocks called segments, providing greater flexibility in memory allocation?

Accepted Answer

Segmentation

Answer

Swapping

Answer

Paging

Answer

Relocation

Question 26

What is the primary objective of memory compaction in operating systems?

Accepted Answer

To reduce memory fragmentation and improve memory utilization efficiency

Answer

To speed up memory access

Answer

To increase cache hit rates

Question 27

Which of the following is a potential disadvantage of utilizing virtual memory?

Accepted Answer

It can increase the number of page faults, potentially slowing down memory access

Answer

It reduces memory fragmentation

Answer

It simplifies memory allocation

Answer

It enhances memory protection

Question 28

What is the primary function of a memory management unit (MMU) in a computer system?

Accepted Answer

To translate virtual addresses generated by the CPU into physical addresses used by memory

Answer

To handle page faults

Answer

To manage the allocation and deallocation of memory

Question 29

Which of the following memory allocation techniques is best suited for large, contiguous memory requests?

Accepted Answer

Buddy allocation

Answer

Worst fit

Answer

Best fit

Answer

First fit

Question 30

What is the key distinction between paging and segmentation in memory management?

Accepted Answer

Paging divides memory into fixed-size pages, while segmentation divides memory into variable-size segments

Answer

Paging is a hardware technique, while segmentation is a software technique

Question 31

Which of the following is a potential issue resulting from fragmentation in memory management?

Accepted Answer

Wasted memory and decreased performance

Answer

Improved security

Answer

Increased memory capacity

Question 32

What is the primary difference between logical and physical addresses in memory management?

Accepted Answer

Logical addresses are generated by the CPU, while physical addresses are used by the memory hardware

Answer

Logical addresses are larger than physical addresses

Question 33

Which of the following is a potential advantage of using a memory pool in memory management?

Accepted Answer

Improved performance and reduced fragmentation

Answer

Increased memory capacity

Answer

Enhanced security