Microcontroller Mock Test 4

10%

Question 1 of 10

1. What is right about the ROR instruction?

it rotates the contents of the register from left to right through carry

it rotates the contents of the register from right to left through carry

it rotates the contents of the register from right to left

it rotates the contents of the register left to right

Question 1 of 10

Question 2 of 10

2. How many times is this loop going to get executed?

     LDI R20, 10
now: LDI R21, 70
     DEC R21
     BRNE now
     OUT PORTB, R20

700

none of the mentioned

Question 2 of 10

Question 3 of 10

3. Which of the following statements are correct about the RCALL instruction?

it is a 2 byte instruction

none of the mentioned

it is a 16 byte instruction

it is a 4 byte instruction

Question 3 of 10

Question 4 of 10

4. Which of the timer can operate in the 16 bit condition?

timer1

all of the mentioned

timer0

timer2

Question 4 of 10

Question 5 of 10

5. Which of the following instruction can be used to toggle a bit of the PORT?

SBI

CBI

None of the mentioned

SBI & CBI

Question 5 of 10

Question 6 of 10

6. Which of the following statements are correct?

PORT register is used to send data out to pins

All of the mentioned

PIN register of a port is used to bring data into CPU from pins

DDR register is used to control the direction of a port

Question 6 of 10

Question 7 of 10

7. Which of the following is correct about BRNE instruction in avr microcontrollers?

it is used to check the zero flag

it is used to jump to the given mentioned label when the zero flag accounts to 0

it is used to compare two registers

it is used to compare two values

Question 7 of 10

Question 8 of 10

8. Timer 0 can act as a counter ____________

all of the mentioned

if the FOC0 bit is set to 110

if the CS02-CS00 are 110 or 111

none of the mentioned

Question 8 of 10

Question 9 of 10

9. When AVR wakes up, then the value of PC becomes?

0000H

00000H

00H

000H

Question 9 of 10

Question 10 of 10

10. The data will not go from the port registers to the pin unless:

DDR register of that port is set to 1

DDR register of that port is set to 0

PORT register of that port is set to 0

PORT register of that port is set to 1

Question 10 of 10