Which of the following instructions will move the contents of the accumulator to register 6?

The I/O ports that are used as address and data for external memory are:

Which of the following instructions will load the value 35H into the high byte of timer 0?

The microcontroller is useful in systems that have nonvariable programs for dedicated applications.

This program code will read data from port 0 and write it to port 2, and it will stop looping when bit 3 of port 2 is set:

The contents of the accumulator after this operation
MOV A,#2BH
ORL A,00H
will be:

The following command will rotate the 8 bits of the accumulator one position to the left:
RL A

An alternate function of port pin P3.0 (RXD) in the 8051 is:

The last 96 locations in the internal data memory are reserved for general-purpose data storage and stack.

Bit-addressable memory locations are:

The 8-bit address bus allows access to an address range of:

The total amount of external code memory that can be interfaced to the 8051 is:

Which of the following commands will move the value at port 3 to register 2?

The following program will cause the 8051 to be stuck in a loop:

Which of the following commands will copy the contents of RAM whose address is in register 0 to port 1?

The 8051 can handle ________ interrupt sources.

This program code will be executed once:

The following program will receive data from port 1, determine whether bit 2 is high, and then send the number FFH to port 3:
READ: MOV A,P1
ANL A,#2H
CJNE A,#02H,READ
MOV P3,#FFH

Microcontrollers often have:

What is the difference between the 8031 and the 8051?