Microprocessor and Microcontroller Quiz

Which register in 8085 holds the address of the next instruction to be executed?

• Accumulator

• Stack Pointer

• Program Counter

• Instruction Register

Which flag is affected after executing the instruction CMP A in 8085?

• Carry flag only

• Zero flag only

• All flags

• Sign and Zero flags

What is the size of the address bus in 8086 microprocessor?

• 8-bit

• 16-bit

• 20-bit

• 32-bit

The instruction IN in 8085 is used to:

• Send data to a port

• Read data from a port

• Load data from memory

• Perform addition

Which of the following is used to convert a digital signal to an analog signal?

• ADC

• DAC

• UART

• Timer

The size of internal RAM in 8051 microcontroller is:

• 64 bytes

• 128 bytes

• 256 bytes

• 512 bytes

How many 16-bit timers does the 8051 have?

• 1

• 2

• 3

• 4

Which pin of 8051 is used to enable external memory interfacing?

• EA (External Access)

• PSEN

• ALE

• RD

In 8051, which port is used as a bidirectional I/O port by default?

• Port 0

• Port 1

• Port 2

• Port 3

The instruction MOV A, #45H in 8051 means:

• Move data from memory address 45H to A

• Add 45H to A

• Move the immediate value 45H to A

• Move content of port 45H to A