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Microcontrollers Questions Set 33:

Quiz Mode

The value in the accumulator after the execution of the following code is:

00H

11H

22H

33H

Solution:

In the SCON register in 8051 microcontroller which bits are for TxD and RxD ?

1,4

2,3

4,5

5,6

Solution:

The open drain bidirectional (input or output) port with internal pullups is

Port 0

Port 1

Port 2

Port 3

Solution:

Which of the following statements about the Basic Input Output System (BIOS) is true?

1, 2, 3, 4

1, 3, 4

1, 2, 3

2, 3, 4

Solution:

Which bit of the SCON register gives the information that 8051 microcontroller is receiving or transmitting the data ?

SM!

SM2

REN

TB8

Solution:

When Timer 1 is in mode 3 , the TCON bits for timer1 that will be controlled by the timer 0 are_______

GF1 and GF0

TF1, TR1

TF0, TR0

IE1 , IT1

Solution:

Which of the following is not an addressing mode in Assembly Level Programming?

Immediate Addressing Mode

Fast Addressing Mode

Direct Addressing Mode

Indexed Addressing Mode

Solution:

The symbol, 'addr 16' represents the 16-bit address which is used by the instructions to specify the destination address of a call or jump.

destination address of CALL

source address of JUMP

destination address of call or jump

source address of call or jump

Solution:

Choose the correct statement about 8051 microcontroller?

Its bit addressable

Its byte addressable

It has 64 KB program memory

all the above

Solution:

What is the main difference between the 8031 and 8051 microcontrollers?

The 8031 has a 16-bit timer, while the 8051 has a 1-bit timer.

The 8031 has a serial port, while the 8051 does not.

The 8031 is a ROM-less version, while the 8051 has on-chip ROM.

The 8031 has a different oscillator compared to the 8051.

Microcontrollers Questions Set 33:

The value in the accumulator after the execution of the following code is:

Solution:

In the SCON register in 8051 microcontroller which bits are for TxD and RxD ?

Solution:

The open drain bidirectional (input or output) port with internal pullups is

Solution:

Which of the following statements about the Basic Input Output System (BIOS) is true?

Solution:

Which bit of the SCON register gives the information that 8051 microcontroller is receiving or transmitting the data ?

Solution:

When Timer 1 is in mode 3 , the TCON bits for timer1 that will be controlled by the timer 0 are_______

Solution:

Which of the following is not an addressing mode in Assembly Level Programming?

Solution:

The symbol, 'addr 16' represents the 16-bit address which is used by the instructions to specify the destination address of a call or jump.

Solution:

Choose the correct statement about 8051 microcontroller?

Solution:

What is the main difference between the 8031 and 8051 microcontrollers?

Solution:

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