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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. | |