Que: 81. Is the same address is assigned for the timer0 and timer1 overflow flag in the interrupt vector table of the interrupts?
|
| a. TRUE |
| b. FALSE |
| 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 |
(d). None of the mentioned
Que: 83. Which register is responsible for handling all the external hardware interrupts?
|
| a. TIMSK |
| b. GICR |
| c. MCUCR |
| d. IVCE |
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 |
(c). the interrupt that is more 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 |
(b). they are the RS232 connectors used to connect two incompatible devices
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 |
(c). this pin is high during reception in order to tell that the device is busy at this particular time
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 |
(c). one needs some additional circuitry to operate while the other doesn’t have that
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 |
(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 |