8085 microprocessors have how many pins?

• 30

• 36

• 40

• 20

Which one of the following is not a vectored interrupt?

• TRAP

• INTR

• RST 7.5

• TRAP

HLT opcode means?

• load data to accumulator

• store result in memory

• load accumulator with contents of register

• end of program

The program counter in a 8085 micro-processor is a 16-bit register, because?

• It counts 16-bits at a time

• There are 16 address lines

• It facilitates the user storing 16-bit data temporarily

• It has to fetch two 8-bit data at a time

A microprocessor is ALU?

• and control unit on a single chip

• and memory on a single chip

• register unit and I/O device on a single chip

• register unit and control unit on a single chip

The cycle required to fetch and execute an instruction in a 8085 microprocessor is which one of the following?

• Clock cycle

• Memory cycle

• Machine cycle

• Instruction cycle

An 8-bit microprocessor signifies that?

• 8-bit address bus

• 8-bit controller

• 8-interrupt lines

• 8-bit data bus

Total no. of instruction for 8085 microprocessor assembly language is?

• 244

• 245

• 246

• 247

The address bus of any microprocessor is always?

• Unidirectional

• Bi-directional

• Either unidirectional or bi-directional

• None

The data bus of any microprocessor is always?

• Unidirectional

• Bi-directional

• Either unidirectional or bi-directional

• None