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.
| 201. |
What is the main function of the SBIC instruction? |
| A. | it is used to clear a particular bit of a port |
| B. | it is used to jump unconditionally |
| C. | it is used to skip the instruction if a particular bit of a port is zero |
| D. | none of the mentioned |
| Answer» D. none of the mentioned | |
| 202. |
Which of the following can generate a non mask able interrupt? |
| A. | access violation to flash memory, ACCVIFG |
| B. | timer_A interrupt |
| C. | compare / capture interrupt |
| D. | all of the mentioned |
| Answer» B. timer_A interrupt | |
| 203. |
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 |
| Answer» C. rotate the contents of the KCODE0 register to the left | |
| 204. |
Changes in Vcc changes the value of V+ ? |
| A. | true |
| B. | false |
| C. | can't be said |
| D. | depends on the conditions |
| Answer» B. false | |
| 205. |
What is the use of the PE and the FE bits of the UCSRA register? |
| A. | they are used for keeping a check at the speed of transmission and reception |
| B. | they are used for keeping a check at the data bits to be transferred |
| C. | they are used to keep the transmission error free |
| D. | they are used as extra redundant bits with no use |
| Answer» D. they are used as extra redundant bits with no use | |
| 206. |
Which of the following is true? |
| A. | interrupts are required to wake a CPU from sleep |
| B. | more then one interrupt can share a same vector address |
| C. | most interrupts are mask able |
| D. | all of the mentioned |
| Answer» E. | |
| 207. |
Which frequency is not recommended for SPI clock? |
| A. | fosc/4 |
| B. | fosc/64 |
| C. | fosc/16 |
| D. | fosc/2 |
| Answer» E. | |
| 208. |
Which of the following is correct about BRNE instruction in avr microcontrollers? |
| A. | it is used to compare two registers |
| B. | it is used to compare two values |
| C. | it is used check the zero flag |
| D. | it is used to jump to the given mentioned label when the zero flag accounts to 1 |
| Answer» E. | |
| 209. |
Why are relays used for driving the motors? |
| A. | they act as a switch for driving motors |
| B. | they increase the current capability required by the motors |
| C. | they are used to reduce the back emf from the motors |
| D. | all of the mentioned |
| Answer» B. they increase the current capability required by the motors | |
| 210. |
To identify that the key is present in which row and the column |
| A. | we ground the bits of the row one by one |
| B. | we ground the bits of the column one by one |
| C. | we connect the bits of the row to the logic level 1 one by one |
| D. | we can connect the columns to the logic level 1 one by one |
| Answer» B. we ground the bits of the column one by one | |
| 211. |
The _____ rate gives the frequency at which the bits are transmitted on the line. |
| A. | bit rate |
| B. | packet rate |
| C. | baud rate |
| D. | data rate |
| Answer» D. data rate | |
| 212. |
In asynchronous mode of transmission, usually the data is sent along with the |
| A. | the start bit |
| B. | the stop bit |
| C. | both of the mentioned |
| D. | none of the mentioned |
| Answer» D. none of the mentioned | |
| 213. |
Timer_A has |
| A. | RTC module in it |
| B. | Compare/ capture channel |
| C. | Communication channel |
| D. | Converter channel |
| Answer» C. Communication channel | |
| 214. |
TACLK and INCLK are |
| A. | internally generated clock pulses |
| B. | externally fed clock pulses |
| C. | of no use in Timer_A |
| D. | very slow |
| Answer» C. of no use in Timer_A | |
| 215. |
The USART in AVR based micro controllers operate at which of the following modes? |
| A. | double speed asynchronous mode |
| B. | master synchronous |
| C. | slave synchronous |
| D. | all of the mentioned |
| Answer» E. | |
| 216. |
Timer 0 can act as a counter |
| A. | if the CS02-CS00 are 110 or 111 |
| B. | if the FOC0 bit is set to 110 |
| C. | none of the mentioned |
| D. | all of the mentioned |
| Answer» B. if the FOC0 bit is set to 110 | |
| 217. |
Their are how many MSP430’s low power modes available in the chip? |
| A. | two |
| B. | three |
| C. | four |
| D. | five |
| Answer» E. | |
| 218. |
Most of the MSP430’s devices have __________ number of timers in it? |
| A. | three |
| B. | four |
| C. | five |
| D. | seven |
| Answer» D. seven | |
| 219. |
For selecting the data pins in a LCD, RS pin should be |
| A. | 1 |
| B. | 0 |
| C. | F |
| D. | 10 |
| Answer» B. 0 | |
| 220. |
IF RTCIE interrupt is generated then |
| A. | BTIFG flag is set |
| B. | RTCFG flag is set |
| C. | Both are flags are set |
| D. | None of the flag is set |
| Answer» D. None of the flag is set | |
| 221. |
For a normal 4 step sequence, what are number of teeth required to accomplish a 2 degree step angle? |
| A. | 180 |
| B. | 90 |
| C. | 360 |
| D. | 45 |
| Answer» E. | |
| 222. |
SQW(pin no 7) is an |
| A. | input pin |
| B. | output pin |
| C. | i/o pin |
| D. | none of the mentioned |
| Answer» C. i/o pin | |
| 223. |
Unlike micro processors, micro controllers make use of batteries because they have: |
| A. | high power dissipation |
| B. | low power consumption |
| C. | low voltage consumption |
| D. | low current consumption |
| Answer» C. low voltage consumption | |
| 224. |
How are micro controllers classified on the basic of internal bus width? |
| A. | 8,16,32,64 bits |
| B. | 4,8,16,32 bits |
| C. | 8,16 bits |
| D. | 4,16,32 bits |
| Answer» C. 8,16 bits | |
| 225. |
How is the performance and the computer capability affected by increasing its internal bus width? |
| A. | it increases and turns better |
| B. | it decreases |
| C. | remains the same |
| D. | internal bus width don’t affect the performance in any way |
| Answer» B. it decreases | |
| 226. |
What is the file extension that is loaded in a micro controller for executing any instruction? |
| A. | .doc |
| B. | .c |
| C. | .txt |
| D. | .hex |
| Answer» E. | |
| 227. |
What are the most appropriate criterion for choosing the right micro controller of our choice? |
| A. | speed |
| B. | availability |
| C. | ease with the product |
| D. | all of the mentioned |
| Answer» E. | |
| 228. |
Why micro controllers are not called general purpose devices? |
| A. | because they are based on VLSI technology |
| B. | because they are not meant to do a single work at a time |
| C. | because they are cheap |
| D. | because they consume low power |
| Answer» C. because they are cheap | |
| 229. |
WHAT_IS_ORDER_OF_THE_ASSEMBLY_AND_RUNNING_8051_PROGRAM??$ |
| A. | Myfile.asm |
| B. | Myfile.lst |
| C. | Myfile.obj |
| D. | Myfile.hex |
| Answer» B. Myfile.lst | |
| 230. |
Which pin provides a reset option in 8051?$ |
| A. | Pin 1 |
| B. | Pin 8 |
| C. | Pin 11 |
| D. | Pin 9 |
| Answer» E. | |
| 231. |
The_use_of_Address_Latch_Enable_is_to_multiplex_address_and_data_memory.$ |
| A. | True |
| B. | False |
| Answer» B. False | |
| 232. |
Timer 0 is a ________ bit register. |
| A. | 32-bit |
| B. | 8-bit |
| C. | 16-bit |
| D. | 10-bit |
| Answer» D. 10-bit | |
| 233. |
How many interrupts are there in micro controller? |
| A. | 3 |
| B. | 6 |
| C. | 4 |
| D. | 5 |
| Answer» E. | |
| 234. |
What is the address range of SFRs? |
| A. | 80h to feh |
| B. | 00h to ffh |
| C. | 80h to ffh |
| D. | 70h to 80h |
| Answer» D. 70h to 80h | |
| 235. |
External_Access_is_used_to_permit_____________ |
| A. | Peripherals |
| B. | Power supply |
| C. | ALE |
| D. | Memory interfacing |
| Answer» E. | |
| 236. |
Auxiliary carry is set during which condition? |
| A. | When carry is generated from D3 to D4 |
| B. | When carry is generated from D7 |
| C. | When carry is generated from both D3 to D4 and D7 |
| D. | When carry is generated at either D3 to D4 or D7 |
| Answer» B. When carry is generated from D7 | |
| 237. |
Program counter stores what? |
| A. | Address of before instruction |
| B. | Address of the next instruction |
| C. | Data of the before execution to be executed |
| D. | Data of the execution instruction |
| Answer» C. Data of the before execution to be executed | |
| 238. |
SCON in serial port is used for which operation? |
| A. | Transferring data |
| B. | Receiving data |
| C. | Controlling |
| D. | Controlling and transferring |
| Answer» D. Controlling and transferring | |
| 239. |
Is ROM is used for storing data storage? |
| A. | True |
| B. | False |
| Answer» C. | |
| 240. |
Number of I/O ports in the 8051 microcontroller? |
| A. | 3 ports |
| B. | 4 ports |
| C. | 5 ports |
| D. | 4 ports with last port having 5 pins |
| Answer» C. 5 ports | |
| 241. |
Name the architecture and the instruction set for microcontroller? |
| A. | Van- Neumann Architecture with CISC Instruction Set |
| B. | Harvard Architecture with CISC Instruction Set |
| C. | Van- Neumann Architecture with RISC Instruction Set |
| D. | Harvard Architecture with RISC Instruction Set |
| Answer» C. Van- Neumann Architecture with RISC Instruction Set | |
| 242. |
What is the bit size of the 8051 microcontroller? |
| A. | 8-bit |
| B. | 4-bit |
| C. | 16-bit |
| D. | 32-bit |
| Answer» B. 4-bit | |
| 243. |
What do you mean by micro in microcontroller? |
| A. | Distance between 2 IC’s |
| B. | Distance between 2 transistors |
| C. | Size of a controller |
| D. | Distance between 2 pins |
| Answer» C. Size of a controller | |