MCQOPTIONS
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MCQOPTIONS
This section includes 2291 Mcqs, each offering curated multiple-choice questions to sharpen your Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 2201. |
If a DAC has a full-scale, or maximum, output of 12 V and accuracy of 0.1%, then the maximum error for any output voltage is ________. |
| A. | 12 V |
| B. | 120 mV |
| C. | 12 mV |
| D. | 0 V |
| Answer» D. 0 V | |
| 2202. |
Which type of ADC quantizes the analog signal into a stream of bits whose amount corresponds to the signal level? |
| A. | Successive approximation |
| B. | Sigma-delta |
| C. | Dual-slope |
| D. | None of the above |
| Answer» C. Dual-slope | |
| 2203. |
In the keypad application, what does the preset state of the ring counter define? |
| A. | The proper output of the column encoder |
| B. | The NANDing of the rows |
| C. | The NANDing of the columns |
| D. | The proper output of the row encoder |
| Answer» E. | |
| 2204. |
Which of the following is not an 8086/8088 general-purpose register? |
| A. | Code segment (CS) |
| B. | Data segment (DS) |
| C. | Stack segment (SS) |
| D. | Address segment (AS) |
| Answer» E. | |
| 2205. |
In a digital reproduction of an analog curve, accuracy can be increased by ________. |
| A. | sampling the curve more often |
| B. | sampling the curve less often |
| C. | decreasing the number of bits used to represent each sampled value |
| D. | all of the above |
| Answer» B. sampling the curve less often | |
| 2206. |
In troubleshooting a DAC, we check its performance characteristics, such as ________. |
| A. | nonmonotonicity |
| B. | differential nonlinearity |
| C. | low and high gain |
| D. | all of the above |
| Answer» E. | |
| 2207. |
In a 4-bit R/2R ladder digital-to-analog converter, because of negative feedback, the operational amplifier keeps the inverting (minus) input near ________. |
| A. | 5 volts |
| B. | zero volts |
| C. | a voltage determined by the binary weighted input |
| D. | none of the above |
| Answer» C. a voltage determined by the binary weighted input | |
| 2208. |
The ADC0804 is an example of a ________. |
| A. | single-slope analog-to-digital converter |
| B. | dual-slope analog-to-digital converter |
| C. | digital-ramp analog-to-digital converter |
| D. | successive-approximation analog-to-digital converter |
| Answer» E. | |
| 2209. |
A port can be ________. |
| A. | strictly for input |
| B. | strictly for output |
| C. | bidirectional |
| D. | all of the above |
| Answer» E. | |
| 2210. |
During a read operation the CPU fetches ________. |
| A. | a program instruction |
| B. | another address |
| C. | data itself |
| D. | all of the above |
| Answer» E. | |
| 2211. |
The first Intel microprocessor to contain on-board cache memory was the ________. |
| A. | 80386 |
| B. | 80486 |
| C. | Pentium |
| D. | Pentium Pro |
| Answer» C. Pentium | |
| 2212. |
Which of the following is not a computer bus? |
| A. | Data bus |
| B. | Control bus |
| C. | Timer bus |
| D. | Address bus |
| Answer» D. Address bus | |
| 2213. |
What is occurring when two or more sources of data attempt to use the same bus? |
| A. | Bus contention |
| B. | Direct memory access |
| C. | Bus interruption |
| D. | PPI |
| Answer» B. Direct memory access | |
| 2214. |
Which of the following is not a jump instruction? |
| A. | JB (jump back) |
| B. | JA (jump above) |
| C. | JO (jump if overflow) |
| D. | JMP (unconditional jump) |
| Answer» B. JA (jump above) | |
| 2215. |
Which of the following was not a design improvement for the 8086/8088 over the 8085? |
| A. | Execution unit (EU) |
| B. | 16-bit data bus |
| C. | Arithmetic logic unit (ALU) |
| D. | Bus interface unit (BIU) |
| Answer» D. Bus interface unit (BIU) | |
| 2216. |
Polled I/O works best when ________. |
| A. | there are no priority considerations |
| B. | priority considerations are frequent |
| C. | the polling rate exceeds 1000 s |
| D. | the polling rate is below 1000 s |
| Answer» B. priority considerations are frequent | |
| 2217. |
LDA addr and STA addr are Fortran language instructions stored in an external memory IC for a microprocessor. |
| A. | True |
| B. | False |
| Answer» C. | |
| 2218. |
The first microprocessor had a(n)________. |
| A. | 1-bit data bus |
| B. | 2-bit data bus |
| C. | 4-bit data bus |
| D. | 8-bit data bus |
| Answer» D. 8-bit data bus | |
| 2219. |
Which microprocessor has multiplexed data and address lines? |
| A. | 8086/8088 |
| B. | 80286 |
| C. | 80386 |
| D. | Pentium |
| Answer» B. 80286 | |
| 2220. |
Which is not an operand? |
| A. | Variable |
| B. | Register |
| C. | Memory location |
| D. | Assembler |
| Answer» E. | |
| 2221. |
Which is not part of the execution unit (EU)? |
| A. | Arithmetic logic unit (ALU) |
| B. | Clock |
| C. | General registers |
| D. | Flags |
| Answer» C. General registers | |
| 2222. |
A 20-bit address bus can locate ________. |
| A. | 1,048,576 locations |
| B. | 2,097,152 locations |
| C. | 4,194,304 locations |
| D. | 8,388,608 locations |
| Answer» B. 2,097,152 locations | |
| 2223. |
The Pentium microprocessor has a data bus of ________. |
| A. | 16 bits |
| B. | 32 bits |
| C. | 64 bits |
| D. | 128 bits |
| Answer» D. 128 bits | |
| 2224. |
The process of jointly establishing communication is called ________. |
| A. | DMA |
| B. | bidirectional addressing |
| C. | multiplexing |
| D. | handshaking |
| Answer» E. | |
| 2225. |
With interrupt-driven I/O, if two or more devices request service at the same time, ________. |
| A. | the device closest to the CPU gets priority |
| B. | the device that is fastest gets priority |
| C. | the device assigned the highest priority is serviced first |
| D. | the system is likely to crash |
| Answer» D. the system is likely to crash | |
| 2226. |
Which of the following is not an arithmetic instruction? |
| A. | INC (increment) |
| B. | CMP (compare) |
| C. | DEC (decrement) |
| D. | ROL (rotate left) |
| Answer» E. | |
| 2227. |
The software used to drive a microprocessor-based system is called FORTRAN. |
| A. | True |
| B. | False |
| Answer» C. | |
| 2228. |
Conversion from assembly language to machine language can be done by the programmer through a process called hand assembly. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 2229. |
Assembly language is written using mnemonics: MVI, DCR, JZ. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 2230. |
The 8085 software is compatible with the 8080A. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 2231. |
A binary-weighted-input digital-to-analog converter has a feedback resistor, Rf, of 12 k. If 50 A of current is through the resistor, voltage out of the circuit is ________. |
| A. | 0.6 V |
| B. | 0.6 V |
| C. | 0.1 V |
| D. | 0.1 V |
| Answer» C. 0.1 V | |
| 2232. |
The resolution of a 6-bit DAC is ________. |
| A. | 63% |
| B. | 64% |
| C. | 15.9% |
| D. | 1.59% |
| Answer» E. | |
| 2233. |
Which type of programming is typically used for digital signal processors? |
| A. | Assembly language |
| B. | Machine language |
| C. | C |
| D. | None of the above |
| Answer» B. Machine language | |
| 2234. |
A 4-bit R/2R ladder digital-to-analog converter uses ________. |
| A. | one resistor value |
| B. | two resistor values |
| C. | three resistor values |
| D. | four resistor values |
| Answer» C. three resistor values | |
| 2235. |
Which of the following best defines Nyquist frequency? |
| A. | The frequency of resonance for the filtering circuit |
| B. | The second harmonic |
| C. | The lower frequency limit of sampling |
| D. | The highest frequency component of a given analog signal |
| Answer» E. | |
| 2236. |
Which is not an A/D conversion error? |
| A. | Differential nonlinearity |
| B. | Missing code |
| C. | Incorrect code |
| D. | Offset |
| Answer» B. Missing code | |
| 2237. |
What do we call the manipulation of an analog signal in a digital domain? |
| A. | Analog-to-digital conversion |
| B. | Digital-to-analog conversion |
| C. | Digital signal processing |
| D. | Signal filtering |
| Answer» C. Digital signal processing | |
| 2238. |
What must a stepper motor HDL application include? |
| A. | Variables and processes |
| B. | Types and bits |
| C. | Counters and decoders |
| D. | Sequencers and multiplexers |
| Answer» D. Sequencers and multiplexers | |
| 2239. |
In an HDL stepper motor design, why is there more than one mode? |
| A. | To change the speed of the stepper motor |
| B. | To change the direction of the stepper motor |
| C. | To direct drive the stepper motor |
| D. | All of the above |
| Answer» E. | |
| 2240. |
Which is not a major block of an HDL frequency counter? |
| A. | Display register |
| B. | Decoder/display |
| C. | Timing and control unit |
| D. | Bit shifter |
| Answer» E. | |
| 2241. |
In the keypad application, when all columns are HIGH, the ring counter is enabled and counting, and dav is LOW, what is the status of the d outputs? |
| A. | On |
| B. | Off |
| C. | Hi-Z |
| D. | 1011 |
| Answer» D. 1011 | |
| 2242. |
In the keypad application, what does the data signal define? |
| A. | The row and column encoded data |
| B. | The ring encoded data |
| C. | The freeze locator data |
| D. | The ring counter data |
| Answer» B. The ring encoded data | |
| 2243. |
What does the ring counter in the HDL keypad application do when a key is pressed? |
| A. | Count to find the row |
| B. | Freeze |
| C. | Count to find the column |
| D. | Start the D flip-flop |
| Answer» C. Count to find the column | |
| 2244. |
In the digital clock project, the purpose of the frequency prescaler is to: |
| A. | find the basic frequency. |
| B. | transform a 60 pps input to a 1 pps timing signal. |
| C. | prevent the clock from exceeding 12:59:59. |
| D. | allow the BCD display to have a value from 00 59. |
| Answer» C. prevent the clock from exceeding 12:59:59. | |
| 2245. |
Which is not a step that should be followed in project management? |
| A. | Overall definition |
| B. | System documentation |
| C. | Synthesis and testing |
| D. | System integration |
| Answer» C. Synthesis and testing | |
| 2246. |
In a full-step sequence involving two flip-flops driving four coils of a stepper motor, how far will the stepper motor step? |
| A. | 90 |
| B. | 45 |
| C. | 30 |
| D. | 15 |
| Answer» E. | |
| 2247. |
Which is not a step used to define the scope of an HDL project? |
| A. | Are the inputs and outputs active HIGH or active LOW? |
| B. | A clear vision of how to make each block work |
| C. | What are the speed requirements? |
| D. | How many bits of data are needed? |
| Answer» C. What are the speed requirements? | |
| 2248. |
In the digital clock project, what is the frequency of the MOD-6 counter in the minutes section? |
| A. | 1 pulse per minute |
| B. | 6 pulses per minute |
| C. | 10 pulses per minute |
| D. | 1 pulse per hour |
| Answer» E. | |
| 2249. |
DMA is particularly suited for data transfer between the ________. |
| A. | disk drive and CPU |
| B. | disk drive and RAM |
| C. | disk drive and ROM |
| D. | disk drive and I/O |
| Answer» C. disk drive and ROM | |
| 2250. |
A microprocessor with the necessary support circuits will include at least two memory ICs: ROM or EPROM, and a RAM. |
| A. | True |
| B. | False |
| Answer» B. False | |