Understanding Virtual Memory Systems

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What is the main goal of memory-management strategies?

To keep many processes in memory simultaneously to allow multiprogramming (correct)
To prevent any program from executing until the entire process is loaded in memory
To minimize the number of processes in memory
To maximize the amount of physical memory used by each process

Why is virtual memory considered advantageous compared to loading the entire process into main memory?

Virtual memory enables running programs with only a part of their address space in main memory (correct)
Virtual memory does not allow processes to share files or libraries
Virtual memory consumes less physical memory than loading the entire process
Virtual memory does not support the execution of large programs

What is the key benefit of virtual memory in terms of program size?

Programs can be larger than physical memory with virtual memory (correct)
Virtual memory restricts the size of programs to a quarter of physical memory
Programs cannot exceed the size of physical memory
Virtual memory limits programs to the size of physical memory

How does virtual memory abstract main memory for programmers?

By presenting a large, uniform array of storage that separates logical from physical memory (D) Signup and view all the answers

Why are memory-management algorithms necessary for executing instructions?

To handle the requirement that instructions must be in physical memory when executed (D) Signup and view all the answers

What is one drawback of implementing virtual memory carelessly?

Decreased performance and efficiency of program execution (A) Signup and view all the answers

What is the primary benefit of virtual memory for programmers?

They can concentrate on programming the problem to be solved (D) Signup and view all the answers

In virtual memory management, how is a program executed when it is only partially loaded in memory?

The operating system has the ability to execute the program partially loaded in memory (B) Signup and view all the answers

What is the function of the memory management unit (MMU) in managing virtual memory?

It maps logical pages to physical page frames in memory (D) Signup and view all the answers

How is the virtual address space different from physical memory in a process?

Virtual address space refers to logical view, while physical memory is organized in page frames (C) Signup and view all the answers

In the context of dynamic memory allocation, how does the system handle the growth of the heap?

By allowing heap growth upward in memory as it is used (C) Signup and view all the answers

Why does the stack grow downward in memory during successive function calls?

To accommodate multiple function calls within a process (D) Signup and view all the answers

What is the main advantage of using virtual memory?

Ability to run more programs simultaneously (A) Signup and view all the answers

What principle is key to the concept of virtual memory?

Locality of reference (A) Signup and view all the answers

Which statement is true about logical (virtual) addresses in virtual memory systems?

May remain unallocated and free (A) Signup and view all the answers

How does virtual memory benefit the system and its users when a program is not entirely in memory?

Reduces I/O operations needed (C) Signup and view all the answers

What is the primary objective of virtual memory?

To provide an illusion of a large, fast memory (C) Signup and view all the answers

How does virtual memory enable running more programs at the same time without increasing response time?

By decreasing the need for I/O operations (A) Signup and view all the answers