MCQOPTIONS
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MCQOPTIONS
This section includes 243 Mcqs, each offering curated multiple-choice questions to sharpen your Internet of things (IoT) knowledge and support exam preparation. Choose a topic below to get started.
| 151. |
TBCLn provided in each channel is actually |
| A. | a comparator |
| B. | compare latch |
| C. | controller |
| D. | control logic |
| Answer» C. controller | |
| 152. |
Rising edge on SDA while SCL is high denotes |
| A. | start condition (S) |
| B. | stop condition (P) |
| C. | transfer in progress |
| D. | none of the mentioned |
| Answer» C. transfer in progress | |
| 153. |
CCI1B comes from |
| A. | ACLK |
| B. | CAOUT |
| C. | SCLK |
| D. | TACLK |
| Answer» C. SCLK | |
| 154. |
TBOUTH can pin can be used to |
| A. | values are moved from one place to another |
| B. | the length of the number of bits is selected by this register |
| C. | it can be used to put all the outputs of the Timer_B register in the high impedance state |
| D. | it can be used for outputting the input values of the timers |
| Answer» D. it can be used for outputting the input values of the timers | |
| 155. |
Pull-up resistors Rp keep the lines at VCC when |
| A. | all the drivers are active |
| B. | none of the drivers are active |
| C. | some the drivers are at sleep |
| D. | none of the driver is at sleep |
| Answer» C. some the drivers are at sleep | |
| 156. |
WDTISx bits control the |
| A. | period of the clock |
| B. | act as “Nonmaskable Interrupts” |
| C. | stop the watchdog timer |
| D. | start the watchdog timer |
| Answer» B. act as “Nonmaskable Interrupts” | |
| 157. |
Why Timer_B is not considered as most suitable one for receiving asynchronous signals? |
| A. | because of the absence of the TBOUTH input pin |
| B. | because of the presence of the TBOUTH input pin |
| C. | because of the absence of the SCCI bit |
| D. | because of the presence of the SCCI bit |
| Answer» D. because of the presence of the SCCI bit | |
| 158. |
In AVR, which registers are there for the I/O programming of ports? |
| A. | PORT |
| B. | PIN |
| C. | DDR |
| D. | All of the mentioned |
| Answer» E. | |
| 159. |
The status register in MSP430 consists of |
| A. | 1 byte |
| B. | 2 bytes |
| C. | 1 bit |
| D. | 2 bit |
| Answer» C. 1 bit | |
| 160. |
To see if any key is pressed, all rows are grounded. |
| A. | true |
| B. | false |
| C. | can’t be said |
| D. | depends on the conditions |
| Answer» B. false | |
| 161. |
Which pin is used for the input clock of the counter0? |
| A. | PORTB.0 |
| B. | PORTB.1 |
| C. | PORTB.2 |
| D. | PORTB.3 |
| Answer» B. PORTB.1 | |
| 162. |
UCB0RXIFG is set when |
| A. | complete byte is acknowledged |
| B. | complete byte is transmitted |
| C. | complete byte is received |
| D. | none of the mentioned |
| Answer» D. none of the mentioned | |
| 163. |
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 |
| Answer» D. none of the mentioned | |
| 164. |
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 |
| Answer» D. one is used just for transmission while the other is used for both transmission as well as reception | |
| 165. |
Indirect register mode is used by |
| A. | source register |
| B. | destination register |
| C. | both of the mentioned |
| D. | none of the mentioned |
| Answer» B. destination register | |
| 166. |
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 |
| Answer» D. 34H | |
| 167. |
WDTNMI is found in the |
| A. | higher byte of WDTCTL |
| B. | lower byte of WDTCTL |
| C. | its first four bits |
| D. | its last four bits |
| Answer» C. its first four bits | |
| 168. |
Which of the following is a type of a electromagnetic relay? |
| A. | SPST |
| B. | SPDT |
| C. | DPDT |
| D. | All of the mentioned |
| Answer» E. | |
| 169. |
The output of a DAC0808 is in form of |
| A. | electrical pulse |
| B. | current |
| C. | voltage |
| D. | all of the mentioned |
| Answer» C. voltage | |
| 170. |
Is CPKH and CPOL the same |
| A. | yes |
| B. | no |
| C. | can't be said |
| D. | depends on the conditions |
| Answer» C. can't be said | |
| 171. |
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 |
| Answer» C. the key that is pressed first will be displayed | |
| 172. |
Which of the two architecture saves memory? |
| A. | Harvard |
| B. | Von Neumann |
| C. | None of the mentioned |
| D. | Both of the mentioned |
| Answer» C. None of the mentioned | |
| 173. |
Which of the following bits reads 0 under normal conditions but goes 1 when it wants to initiate some action? |
| A. | WDTNMI |
| B. | WDTHOLD |
| C. | WDTTMSEL |
| D. | WDTCNTCL |
| Answer» E. | |
| 174. |
USI handles |
| A. | SPI |
| B. | I2C |
| C. | Both of the mentioned |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 175. |
Which of the following is the slave to be addressed when a device acts as a master |
| A. | UCB0I2COA |
| B. | UCB0I2CSA |
| C. | UCB0I2CIE |
| D. | All of the mentioned |
| Answer» C. UCB0I2CIE | |
| 176. |
Which instruction is used to call functions? |
| A. | MOV |
| B. | GO |
| C. | CALL |
| D. | All of the mentioned |
| Answer» D. All of the mentioned | |
| 177. |
To ensure that a negative fluctuation does not trigger an unwanted downward transition by pulling the input down through VIT−, we must choose |
| A. | minimum hysteresis |
| B. | maximum hysteresis |
| C. | all of the mentioned |
| D. | none of the mentioned |
| Answer» B. maximum hysteresis | |
| 178. |
Which of the following is correct? |
| A. | I2C is a technique by which data is transmitted with the help of only eight pins |
| B. | SDA is used to synchronize data transfer between two chips |
| C. | TWI is an another name for I2C |
| D. | All of the mentioned |
| Answer» D. All of the mentioned | |
| 179. |
All channels within Timer_A share the same timer block |
| A. | yes |
| B. | no |
| C. | can't be said |
| D. | depends on the conditions |
| Answer» B. no | |
| 180. |
Clock is transmitted in the asynchronous communication? |
| A. | yes |
| B. | no |
| C. | can't be said |
| D. | depends on the conditions |
| Answer» C. can't be said | |
| 181. |
The key detection and the key identification are two different procedures? |
| A. | true |
| B. | false |
| C. | depends on the circumstances |
| D. | difficult to tell |
| Answer» B. false | |
| 182. |
The relaxation oscillator circuit helps in |
| A. | calculating the duration single RC transient |
| B. | setting the reference voltage |
| C. | setting the clock frequency |
| D. | calculating the conversion speed |
| Answer» B. setting the reference voltage | |
| 183. |
Sigma delta converter is a |
| A. | 1 bit converter |
| B. | 2 bit converter |
| C. | 3 bit converter |
| D. | 4 bit converter |
| Answer» B. 2 bit converter | |
| 184. |
When the buffer is________ the low power mode is__________ |
| A. | empty, reset |
| B. | having one byte, reset |
| C. | full, reset |
| D. | empty, two |
| Answer» D. empty, two | |
| 185. |
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 |
| Answer» E. | |
| 186. |
Do LM34 and LM35 based sensors have linear output? |
| A. | yes |
| B. | no |
| C. | depends on the conditions |
| D. | can’t say |
| Answer» B. no | |
| 187. |
What is the function of __ __interrupt keyword |
| A. | it is used to enable the interrupt |
| B. | it is used to disable the interrupt |
| C. | it is used to assign a particular address to a vector |
| D. | all of the mentioned |
| Answer» D. all of the mentioned | |
| 188. |
The 8255 can be programmed in any of the |
| A. | 2 modes |
| B. | 3 modes |
| C. | 4 modes |
| D. | 5 modes |
| Answer» D. 5 modes | |
| 189. |
The length of TBR can be programmed to be |
| A. | 8 bits |
| B. | 12 bits |
| C. | 16 bits |
| D. | all of the mentioned |
| Answer» E. | |
| 190. |
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 |
| Answer» E. | |
| 191. |
The intervals between the samples is obtained from |
| A. | Fs |
| B. | Ts |
| C. | Us |
| D. | Ks |
| Answer» C. Us | |
| 192. |
Indirect mode and the indirect auto increment mode have which common operator in them |
| A. | + |
| B. | – |
| C. | @ |
| D. | & |
| Answer» D. & | |
| 193. |
Which of the following is an issue while programming I2C using software? |
| A. | open-collector output |
| B. | open-drain output |
| C. | totem pole output |
| D. | all of the mentioned |
| Answer» C. totem pole output | |
| 194. |
Unused pins must never be left unconnected in their default state as inputs. |
| A. | true |
| B. | false |
| C. | can't be said |
| D. | depends on the conditions |
| Answer» B. false | |
| 195. |
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 |
| Answer» C. to remove the flow problems | |
| 196. |
Which of the following are the low power modes? |
| A. | LPM0 |
| B. | LPM3 |
| C. | LPM4 |
| D. | All of the mentioned |
| Answer» E. | |
| 197. |
What actually is SD16_A? |
| A. | it is an interrupt |
| B. | it is a timer |
| C. | it is an analog to Digital Converter |
| D. | it is a serial communication module |
| Answer» D. it is a serial communication module | |
| 198. |
SD16_A features are controlled by |
| A. | memory mapped registers |
| B. | register mapped registers |
| C. | data mapped registers |
| D. | none of the mentioned |
| Answer» B. register mapped registers | |
| 199. |
While conversion is in progress, which of the flag is affected. |
| A. | ADC10ON |
| B. | ADC10MEM |
| C. | ADC10BUSY |
| D. | ADC10DF |
| Answer» D. ADC10DF | |
| 200. |
Which out of the following instructions don’t affect the flags of the status register? |
| A. | AND |
| B. | INC |
| C. | OR |
| D. | ADD |
| Answer» E. | |