Microcontroller set 9

Que: 81. Is the same address is assigned for the timer0 and timer1 overflow flag in the interrupt vector table of the interrupts?
c. can’t be determined
d. depends on the situation
Que: 82. External hardware interrupts are assigned to which pins of the atmega32?
a. PORTD.2
b. PORTD.3
c. All of the mentioned
d. None of the mentioned
Que: 83. Which register is responsible for handling all the external hardware interrupts?
Que: 84. By default, INT0-INT2 interrupts are?
a. edge triggered
b. level triggered
c. all of the mentioned
d. none of the mentioned
Que: 85. What will happen in that condition, if an interrupt occurs while the micro controller is serving any other interrupt?
a. both the interrupts will be handled simultaneously
b. the interrupt which is being done first will be served first
c. the interrupt that is more priority in the interrupt vector table will be served first
d. the interrupt having low priority in the interrupt vector table will be served first
Que: 86. What actually are the DB9, DB25 ports available in our computers?
a. they are connectors used to transfer data either serially or parallelly
b. they are the RS232 connectors used to connect two incompatible devices
c. they are the TTL logic connector pins used for communication
d. they are just data transfer pins used to transfer the data
Que: 87. What does RI handshaking signal refer to according to the RS232 logic?
a. if this logic is high then an receive interrupt is generated
b. this pin is high during transmission
c. this pin is high during reception in order to tell that the device is busy at this particular time
d. none of the mentioned
Que: 88. What is the major difference between a MAX232 and a MAX233 device?
a. one has one serial port other has two
b. one has inbuilt UART other doesn’t have that
c. one needs some additional circuitry to operate while the other doesn’t have that
d. one is used just for transmission while the other is used for both transmission as well as reception
Que: 89. Which of the following is correct about the baud rate during serial transmission?
a. it tells us about the speed at which the transmission is going to place
b. it tells us about the number of bits transferred during a second
c. none of the mentioned
d. all of the mentioned
Que: 90. With fosc= 8 MHz, what will the count that has to filled in the UBRR register to account for the 9600 baud rate?
a. 67H
b. CEH
c. 33H
d. 34H