Which of the following address is seen by the memory unit?a)logical addressb)physical addressc)virtual addressd)memory addressCorrect answer is option 'B'. Can you explain this answer?

Question

Answer

In computing, a physical address (also real address, or binary address), is a memory address that is represented in the form of a binary number on the address bus circuitry in order to enable the data bus to access a particular storage cell of main memory, or a register of memory mapped I/O device.hence,option (A) is correct.

Answer

The set of all logical addresses generated by a program is known as logical address space. Whereas, an address seen by the memory unit- that is, the one loaded into the memory-address register of the memory- is commonly referred to as physical address......

Answer

Memory Unit and Address Types

The memory unit in a computer system is responsible for storing and retrieving data. It is an essential component that enables a computer to perform tasks effectively. When accessing data in the memory unit, the computer needs to know the specific location of the data. This is where different types of addresses come into play.

Logical Address
- A logical address is an address that is generated by the CPU (Central Processing Unit) during program execution.
- It represents the location of data in the virtual memory space.
- Logical addresses are typically used by the operating system and the CPU to manage memory and execute instructions.

Physical Address
- A physical address is the actual location of data in the physical memory (RAM).
- It is generated by the memory management unit (MMU) and used by the memory unit to access data.
- The MMU translates logical addresses into physical addresses.
- The physical address represents the specific location where data is stored in the physical memory chips.

Virtual Address
- A virtual address is an address that is used in virtual memory systems.
- It is generated by the CPU and represents the location of data in the virtual memory space.
- Virtual addresses are translated into physical addresses by the MMU.
- Virtual memory allows the computer to use more memory than is physically available by storing data in secondary storage devices such as hard drives.

Memory Address
- The term 'memory address' is not a specific type of address but rather a general term used to refer to addresses used by the memory unit.
- It can be used to describe both physical and virtual addresses.
- In the context of this question, the memory address refers to the physical address.
- The physical address is the address seen by the memory unit when accessing data in the physical memory.

Conclusion
In summary, the memory unit in a computer system accesses data using physical addresses. While logical and virtual addresses are used by the CPU and the operating system, the memory unit itself deals with physical addresses to retrieve or store data in the physical memory. Therefore, the correct answer to the question is option 'B' - physical address.

Answer

Memory addres

Similar Computer Science Engineering (CSE) Doubts

A computer system supports 32-bit virtual addresses as well as 32-bit physical addresses. Since the virtual address space is of the same size as the physical address space, the operating system designers decide to get rid of the virtual memory entirely. Which one of the following is true?

A computer system supports 32-bit virtual addresses as well as 32-bit physical addresses. Since the virtual address space is of the same size as the physical address space, the operating system designers decide to get rid of the virtual memory entirely. Which one of the following is true?

Which one of the following statements is true?

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