Memory Allocation Mechanisms in Operating Systems

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What is the purpose of the relocation register in single-partition allocation memory management?

To allocate fixed-sized partitions for processes

To contain the value of the smallest physical address (correct)

To load processes into free memory partitions

To prevent external fragmentation

Which type of allocation uses a limit register to define the range of logical addresses per process?

Paging techniques

Multiple-partition allocation

Single-partition allocation (correct)

Internal fragmentation

What is the main cause of external fragmentation in memory management systems?

Contiguous memory space not available for a process (correct)

Processes being loaded and removed frequently

Insufficient memory space for processes

Size mismatch between logical and physical addresses

In multiple-partition allocation, what happens to a partition when the process loaded into it terminates?

The partition is reused for another process Signup and view all the answers

What problem arises when processes cannot be loaded into memory blocks due to their small size, leaving some memory blocks unused?

Internal fragmentation Signup and view all the answers

How does multiple-partition allocation manage memory blocks for loading processes?

Allocating one process per free partition Signup and view all the answers

What does the base register in memory management hold?

The smallest legal physical memory address Signup and view all the answers

In what scenario is compile time binding used?

When it is known at compile time where the process will reside Signup and view all the answers

What is the purpose of dynamic loading in memory management?

To load a routine of a program only when it is called Signup and view all the answers

What happens during load time binding in memory management?

The compiler generates re-locatable code Signup and view all the answers

How does dynamic loading contribute to memory space utilization?

By loading routines into memory only when they are needed Signup and view all the answers

What is the purpose of the limit register in memory management?

Specifies the size of the range for memory access Signup and view all the answers

What is the primary role of the operating system in memory management?

Allocating memory when a process needs it and de-allocating when no longer needed Signup and view all the answers

What is the purpose of logical and physical address spaces in memory management?

Logical addresses are used by processes, while physical addresses refer to actual memory locations Signup and view all the answers

What is the purpose of paging in memory management?

To divide the physical memory into fixed-size blocks for allocation Signup and view all the answers

How do base and limit registers help in memory protection?

They define the range of memory a process can access, preventing unauthorized access Signup and view all the answers

What is the role of the operating system in allocating and de-allocating memory?

It assigns memory to processes when needed and frees it when no longer required Signup and view all the answers

What is the purpose of the traffic controller in processor management?

To keep track of processor usage and process status Signup and view all the answers

Memory Allocation Mechanisms in Operating Systems

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