8051 Microcontroller Quiz

What is the key distinction between a microprocessor and a microcontroller?

• Microprocessors are general-purpose computing devices, whereas microcontrollers are designed for specific control tasks.

• Microcontrollers have higher processing power than microprocessors.

• Microprocessors have I/O ports, whereas microcontrollers do not.

• Microcontrollers cannot perform arithmetic operations.

What does the ALU in the 8051 microcontroller perform?

• Stores data

• Executes arithmetic and logic operations

• Handles program control

• Manages external devices

What is the role of the Program Counter in the 8051 microcontroller?

• Holds temporary data

• Points to the next instruction to execute

• Handles external memory

• Manages input-output ports

Which register in the 8051 microcontroller represents the microcontroller's current operational status?

• Accumulator

• Stack Pointer

• PSW (Program Status Word)

• Timer

What is the primary function of the Stack Pointer in the 8051 microcontroller?

• Points to current executing instruction

• Permanently stores program data

• Tracks the top of the stack in memory

• Handles interrupt requests

How many I/O ports are integrated into the 8051 microcontroller?

• 2

• 4

• 6

• 8

Which block in the 8051 microcontroller facilitates serial communication?

• Timer/Counter

• Accumulator

• Serial Port

• Program Counter

What is the purpose of the Interrupt system in the 8051 microcontroller?

• Executes logical operations

• Temporarily suspends the main program to handle tasks

• Manages memory operations

• Controls data transfer

What function do timers perform in the 8051 microcontroller?

• Execute arithmetic operations

• Manage counting and timing tasks

• Store program instructions

• Regulate I/O operations

What is external memory in the 8051 microcontroller primarily used for?

• Temporarily stores data

• Holds program code and large datasets

• Performs calculations

• Enables faster processing