Microprocessor and Computer Architecture

The microprocessor of a computer can operate on any information if it is present in ______________ only.

• Program Counter

• Flag

• Main Memory

• Secondary Memory

What is the word length of an 8-bit microprocessor?

• 8-bits – 64 bits

• 4-bits – 32 bits

• 8-bits – 16 bits

• 8-bits – 32 bits

Which of the following is not true about the address bus?

• It consists of control PIN 21 to 28

• It is a bidirectional bus

• It is 16 bits in length

• Lower address bus lines (AD₀ – AD₇) are called “Line number”

Which of the following is true about microprocessors?

• It has an internal memory

• It has interfacing circuits

• It contains ALU, CU, and registers

• It uses Harvard architecture

Which of the following is the correct sequence of operations in a microprocessor?

• Opcode fetch, memory read, memory write, I/O read, I/O write

• Opcode fetch, memory write, memory read, I/O read, I/O write

• I/O read, opcode fetch, memory read, memory write, I/O write

• I/O read, opcode fetch, memory write, memory read, I/O write

Which of the following is true about stack pointer?

• Stack pointer contains the address of the top of the stack memory

• Stack pointer is an 8-bit register

• Stack pointer stores data permanently

• Stack pointer is initialized after stack operation

Suppose registers ‘A’ and ‘B’ contain 50H and 40H respectively. After instruction MOV A, B, what will be the contents of registers A and B?

• a) 40H, 40H

• b) 50H, 40H

• c) 50H, 50H

• d) 60H, 40H

The ______ format is usually used to store data.

• BCD

• Decimal

• Hexadecimal

• Octal

he control unit controls other units by generating ___________

• Control signals

• Timing signals

• Transfer signals

• Command Signals

How many address lines are present in 8086 microprocessor?

• a) 16
  
  
  

• b) 20

• c) 32

• d) 40