Que: 111. The key detection and the key identification are two different procedures?
|
| a. TRUE |
| b. FALSE |
| c. depends on the circumstances |
| d. difficult to tell |
Que: 112. What is described by the following command?KCODE0<<1
|
| a. load KCODE0 with 0 |
| b. rotate the contents of the KCODE0 register to the right |
| c. rotate the contents of the KCODE0 register to the left |
| d. none of the mentioned |
(b). rotate the contents of the KCODE0 register to the right
Que: 113. If the pins of the keyboard are used as an interrupt, then these pins will cause interrupt of what type?
|
| a. External hardware interrupt |
| b. Timer interrupt |
| c. TI/RI interrupt |
| d. None of the mentioned |
(a). External hardware interrupt
Que: 114. What will happen if two keys of the keyboard are pressed at a time?
|
| a. both the keys will be displayed on the screen |
| b. the key which is being actually pressed(for more then 20microseconds) will be displayed |
| c. the key that is pressed first will be displayed |
| d. none of the mentioned |
(b). the key which is being actually pressed(for more then 20microseconds) will be displayed
Que: 115. Why initially all keys are considered open before detecting the key pressed?
|
| a. to make task easy |
| b. to remove the errors caused by other pressing keys during detection |
| c. to remove the flow problems |
| d. none of the mentioned |
(b). to remove the errors caused by other pressing keys during detection
Que: 116. Which of the following is correct about the word resolution in ADC DAC converters in AVR’s?
|
| a. it is the smallest change that can be described by an ADC |
| b. it is equal to Vref/2^n (where n represents the number of bits) |
| c. it is 0.076 for n=16 and Vref=5V |
| d. all of the mentioned |
(d). all of the mentioned
Que: 117. In an ADC, we can calculate the output voltage from the formula
|
| a. Step size / Vin |
| b. Step size * Vin |
| c. Vin / step size |
| d. Vref / step size |
Que: 118. ADC0848 is a ____________ bit converter?
|
| a. 16 |
| b. 4 |
| c. 8 |
| d. 48 |
Que: 119. Which of the following factors can affect the step size calculation?
|
| a. number of bits |
| b. input current |
| c. output current |
| d. all of the mentioned |
Que: 120. Which of the following is correct about the word sensors?
|
| a. that senses something |
| b. it is a type of a transducer that converts one form of energy to another |
| c. it can produce output in the form of electrical pulses, current or voltage |
| d. all of the mentioned |
(d). all of the mentioned