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Von Neumann Architecture Concepts Quiz

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Questions and Answers

What is the key concept of the von Neumann architecture related to memory storage?

Data and instructions are stored in separate memory units
Data and instructions are stored in a single read-write memory (correct)
Data is stored in a read-only memory and instructions in a read-write memory
Data is stored in a cache memory

What is the purpose of the Memory Address Register (MAR) in a computer system?

Contains the data to be written into memory
Specifies the address in memory for the next read or write (correct)
Used for the exchange of data between an I/O module and CPU
Holds the address of the next instruction to be fetched

What does the I/O Buffer Register (I/OBR) do in a computer system?

Used for the exchange of data between an I/O module and CPU
Contains the data to be written into memory or receives the data read from memory (correct)
Specifies a particular I/O device
Holds the address of the next instruction to be fetched

What happens at the beginning of each instruction cycle in a computer system?

The processor fetches an instruction from memory (B) Signup and view all the answers

Why is the width of the data bus considered a key factor in determining overall system performance?

It affects the number of bits that can be transferred at a time (C) Signup and view all the answers

What is the purpose of the Instruction Register (IR) in a computer system?

Interprets the instruction fetched from memory (C) Signup and view all the answers

What distinguishes a System Bus from other communication lines in a computer system?

It connects major computer components like processor, memory, and I/O (D) Signup and view all the answers

What does the Program Counter (PC) hold in a computer system?

The address of the next instruction to be fetched (D) Signup and view all the answers

In what scenario is direct memory access (DMA) used in a computer system?

To enable an I/O module to read or write directly to memory (A) Signup and view all the answers

Which component specifies a particular I/O device in a computer system?

I/O Address Register (I/OAR) (D) Signup and view all the answers