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.
| 101. |
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 |
| Answer» D. the interrupt having low priority in the interrupt vector table will be served first | |
| 102. |
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 |
| Answer» C. they are the TTL logic connector pins used for communication | |
| 103. |
What is the difference in operation of a normal and a CTC mode of a timer? |
| A. | in CTC mode PWM is used |
| B. | here serial timer is monitored |
| C. | here the contents are compared with the OCR register, if value becomes equal then only the timer is cleared |
| D. | none of the mentioned |
| Answer» D. none of the mentioned | |
| 104. |
Which resource provides clock pulse to AVR timers if CS02-00=6? |
| A. | internal clock of the AVR |
| B. | external clock of the AVR |
| C. | none of the mentioned |
| D. | all of the mentioned |
| Answer» C. none of the mentioned | |
| 105. |
On reset, what are the contents of the SREG register? |
| A. | 00h |
| B. | ffh |
| C. | 1fh |
| D. | 11h |
| Answer» B. ffh | |
| 106. |
Which bit of the UCSRA is used for doubling the baud rate of the transmission? |
| A. | DOR |
| B. | PE |
| C. | U2X |
| D. | MPCM |
| Answer» D. MPCM | |
| 107. |
Which of the following parameters should the transmitter and the receiver agree upon before starting a serial transmission? |
| A. | baud rate |
| B. | frame size |
| C. | stop bit |
| D. | all of the mentioned |
| Answer» E. | |
| 108. |
Which of the following bits are used for setting the data frame size? |
| A. | UCSZ0 |
| B. | U2X |
| C. | DOR |
| D. | MPCM |
| Answer» B. U2X | |
| 109. |
In AVR, the LCD operates in two main modes, it can be in 8 bit or 4 bit data. |
| A. | true |
| B. | false |
| C. | depends on the situation |
| D. | can’t be said |
| Answer» B. false | |
| 110. |
Which of the following supports CISC as well as Harvard architecture? |
| A. | ARM7 |
| B. | ARM9 |
| C. | SHARC |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 111. |
Which micro controller don’t match with its architecture below? |
| A. | Microchip PIC- Harvard |
| B. | MSP430- Harvard |
| C. | ARM7- Von Neumann |
| D. | ARM9- Harvard |
| Answer» C. ARM7- Von Neumann | |
| 112. |
Largest value that can be loaded in an 8 bit register is? |
| A. | 11111111H |
| B. | FH |
| C. | FFH |
| D. | 00H |
| Answer» D. 00H | |
| 113. |
The total space for the data memory available in the AVR based micro controller is? |
| A. | FFH |
| B. | FFFH |
| C. | FFFFH |
| D. | FFFFFH |
| Answer» D. FFFFFH | |
| 114. |
A micro controller at-least should consist of: |
| A. | RAM, ROM, I/O devices, serial and parallel ports and timers |
| B. | CPU, RAM, I/O devices, serial and parallel ports and timers |
| C. | CPU,RAM, ROM, I/O devices, serial and parallel ports and timers |
| D. | CPU, ROM, I/O devices and timers |
| Answer» D. CPU, ROM, I/O devices and timers | |
| 115. |
In the JMP instruction how many bits are their for determining the target address? |
| A. | 16 |
| B. | 32 |
| C. | 22 |
| D. | 10 |
| Answer» D. 10 | |
| 116. |
Which of the following statements is/are correct? |
| A. | relative address of RJMP instruction varies from 000-fffH |
| B. | target address of JMP instruction varies from 000000-3fffffH |
| C. | IJMP instruction jumps to that address that points to by the Z register |
| D. | all of the mentioned |
| Answer» E. | |
| 117. |
Which of the following statements are correct about the RCALL instruction? |
| A. | it is a 2 byte instruction |
| B. | it is a 4 byte instruction |
| C. | it is a 16 byte instruction |
| D. | none of the mentioned |
| Answer» B. it is a 4 byte instruction | |
| 118. |
A 14 bit program counter can execute a maximum of _________ memory locations? |
| A. | 4K |
| B. | 8K |
| C. | 16K |
| D. | 64K |
| Answer» D. 64K | |
| 119. |
When AVR wakes up, then the value of PC becomes? |
| A. | 00H |
| B. | 000H |
| C. | 0000H |
| D. | 00000H |
| Answer» E. | |
| 120. |
What is the difference between the two given instructions?LDI R16,0x34 and LDI R16,$34 |
| A. | One copies the hexadecimal value to R16 and the other copies the decimal value to the R16 register |
| B. | One is for command, other is for data |
| C. | One is for assignment, other is for operations |
| D. | Both the commands are the same |
| Answer» E. | |
| 121. |
The basic idea behind the sigma delta converter is that |
| A. | to carry out the conversion |
| B. | to carry out communication |
| C. | to reduce the circuit to its simplest way possible and then carry out the conversion |
| D. | all of the mentioned |
| Answer» D. all of the mentioned | |
| 122. |
The only clock that runs in the LPM3 is the |
| A. | MCLK |
| B. | ACLK |
| C. | CLK |
| D. | None of the mentioned |
| Answer» C. CLK | |
| 123. |
Decimated means |
| A. | multipled by 10 |
| B. | multiplied by 100 |
| C. | divided by 10 |
| D. | divided by 100 |
| Answer» D. divided by 100 | |
| 124. |
RTC chips use______to compute time, date when the power is off. |
| A. | ac supply |
| B. | generators |
| C. | rectifiers |
| D. | battery |
| Answer» E. | |
| 125. |
In a DAC the input is ______ and the output is ______ |
| A. | analog, digital |
| B. | current, voltage |
| C. | digital, analog |
| D. | analog, current |
| Answer» D. analog, current | |
| 126. |
Is status flag important in multi master systems? |
| A. | yes |
| B. | no |
| C. | depends on the conditions |
| D. | can't be said |
| Answer» B. no | |
| 127. |
How many times is this loop going to get execute? LDI R20, 10now: LDI R21, 70 DEC R21 BRNE now OUT PORTB, R20 |
| A. | 10 |
| B. | 70 |
| C. | 700 |
| D. | none of the mentioned |
| Answer» C. 700 | |
| 128. |
Which of the following statements is true? |
| A. | CALL instruction is used to transfer control anywhere in the 4M memory space |
| B. | PUSH instruction is used to take out the value from the stack into some register |
| C. | POP instruction is used to jump to any location |
| D. | RCALL is a 4 byte instruction |
| Answer» B. PUSH instruction is used to take out the value from the stack into some register | |
| 129. |
After subroutine which of the instruction is used for returning the pointer back to the main program? |
| A. | ret |
| B. | reti |
| C. | both of the mentioned |
| D. | none of the mentioned |
| Answer» D. none of the mentioned | |
| 130. |
ADC10SHTx bits allow_________cycles of the ADC10CLK. |
| A. | 4 |
| B. | 8 |
| C. | 16 |
| D. | all of the mentioned |
| Answer» E. | |
| 131. |
P1.3 is the |
| A. | input CCI1A to Timer_A |
| B. | is connected to the voltage reference VREF of SD16_A |
| C. | is output TA0 from Timer_A |
| D. | are digital inputs with pull-up resistors |
| Answer» C. is output TA0 from Timer_A | |
| 132. |
When TBR counts to zero |
| A. | TBCLn is updated from TBCCRn |
| B. | CLLDx is updated to TBCCTLn |
| C. | CLLDx is updated to TBCCRn |
| D. | TBCLn is updated to CLLDx |
| Answer» B. CLLDx is updated to TBCCTLn | |
| 133. |
In reading the columns of a keyboard matrix, when no key is pressed then all the pins show |
| A. | 0 |
| B. | 1 |
| C. | F |
| D. | 7 |
| Answer» C. F | |
| 134. |
Which of the following bits are not actually associated with the comparator module. |
| A. | CAREFx |
| B. | CLLDx |
| C. | CAON |
| D. | CAIFG |
| Answer» C. CAON | |
| 135. |
How is I2C with USI different from I2C with USI_B? |
| A. | there is only one common pin between the two devices |
| B. | here in this case no synchronization is important |
| C. | the outputs of SDA and SCL are open drain |
| D. | none of the mentioned |
| Answer» D. none of the mentioned | |
| 136. |
In AVR micro controllers, ADD instruction affects the status of which of the following bits of a status register? |
| A. | Z |
| B. | C |
| C. | N |
| D. | All of the mentioned |
| Answer» E. | |
| 137. |
Waking a device simply means that switching that device’s operation from a low power mode to an active mode. |
| A. | true |
| B. | false |
| C. | can't be said |
| D. | depends on the conditions |
| Answer» B. false | |
| 138. |
The technical terms that helps us in differentiating between converters are: |
| A. | resolution |
| B. | accuracy |
| C. | precision |
| D. | all of the mentioned |
| Answer» E. | |
| 139. |
Asynchronous serial communication usually requires two wires for each direction plus a common ground. |
| A. | true |
| B. | false |
| C. | can't be said |
| D. | depends on the conditions |
| Answer» C. can't be said | |
| 140. |
Is the following instruction correct LDI R3,50? |
| A. | Yes |
| B. | No |
| C. | can't be said |
| D. | None of the mentioned |
| Answer» C. can't be said | |
| 141. |
What is the non return to zero format? |
| A. | the bits are either high or low and have no gaps between them |
| B. | the bits are either high or low and have gaps between them |
| C. | the bits are high and have gaps between them |
| D. | the bits are low and have no gaps between them |
| Answer» B. the bits are either high or low and have gaps between them | |
| 142. |
A framing error occurs is the bit is |
| A. | high |
| B. | low |
| C. | same |
| D. | changed |
| Answer» C. same | |
| 143. |
Baud rate is the reverse of the |
| A. | baud time |
| B. | baud period |
| C. | bit time |
| D. | bit period |
| Answer» C. bit time | |
| 144. |
The successive approximation converters have resolution of |
| A. | 8-10 bits |
| B. | 10-12 bits |
| C. | 12-16 bits |
| D. | 16-32 bits |
| Answer» C. 12-16 bits | |
| 145. |
BITCLK16 is the |
| A. | sampling clock in the undersampling mode |
| B. | sampling clock in the oversampling mode |
| C. | quantising clock in the undersampling mode |
| D. | quantising clock in the oversampling mode |
| Answer» C. quantising clock in the undersampling mode | |
| 146. |
Their are _______ clocks in the USCI_A. |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» D. 4 | |
| 147. |
LSB is sent first in case of the non return to zero format. |
| A. | true |
| B. | false |
| C. | can't be said |
| D. | depends on the conditions |
| Answer» B. false | |
| 148. |
CP instruction alters the value of the register? |
| A. | true |
| B. | false |
| C. | none of the mentioned |
| D. | can’t be said |
| Answer» C. none of the mentioned | |
| 149. |
What does the RTCTEVx bits do? |
| A. | they cause an interrupt |
| B. | they end an interrupt |
| C. | they set the minute, hour, seconds daily at midnight or daily at noon |
| D. | all of the mentioned |
| Answer» D. all of the mentioned | |
| 150. |
On power on SP points to the address? |
| A. | ffffH |
| B. | fffH |
| C. | 00h |
| D. | all of the mentioned |
| Answer» D. all of the mentioned | |