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.
| 2251. |
I/O-mapped systems identify their input and output devices by giving them an 8-bit port number. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 2252. |
A microcontroller integrates multichip systems with RAM, ROM, and I/O. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 2253. |
In the frequency counter, what is the function of the Schmitt trigger circuit? |
| A. | To reduce input noise |
| B. | To condition the input signal |
| C. | To convert non-square waveforms |
| D. | To provide a usable signal to the display unit |
| Answer» D. To provide a usable signal to the display unit | |
| 2254. |
Programs written for the 8080A must have slight modifications to run on the 8085A. |
| A. | True |
| B. | False |
| Answer» C. | |
| 2255. |
List three basic blocks in the digital clock project. |
| A. | MOD-60, MOD-12 counters |
| B. | MOD-5, MOD-10, MOD-12 counters |
| C. | MOD-60, MOD-10 counters |
| D. | MOD-6, MOD-12, and MOD-10 counters |
| Answer» E. | |
| 2256. |
The stack is a data storage area in RAM used by certain microprocessor operations. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 2257. |
When designing an HDL digital system, which is the worst mistake one can make? |
| A. | Concluding that a fundamental block works perfectly |
| B. | Failing to provide proper documentation |
| C. | Adding blocks of code prior to testing them |
| D. | Overlooking a possible VARIABLE |
| Answer» B. Failing to provide proper documentation | |
| 2258. |
For the frequency counter, which is not a control signal from the control and timing block? |
| A. | Clear |
| B. | Enable |
| C. | Reset |
| D. | Store |
| Answer» D. Store | |
| 2259. |
In the keypad application, just after the 4 ms mark the simulation imitates the release of the key by changing the column value back to F hex, which causes the d output to go into its Hi-Z state. On the next rising clock edge, what happens to dav? |
| A. | It goes HIGH. |
| B. | It goes LOW. |
| C. | It goes to Hi-Z. |
| D. | It goes to 1111H. |
| Answer» C. It goes to Hi-Z. | |
| 2260. |
For a 4-bit DAC, the least significant bit (LSB) is ________. |
| A. | 6.25% of full scale |
| B. | 0.625% of full scale |
| C. | 12% of full scale |
| D. | 1.2% of full scale |
| Answer» B. 0.625% of full scale | |
| 2261. |
The dual-slope analog-to-digital converter finds extensive use in ________. |
| A. | digital voltmeters |
| B. | function generators |
| C. | frequency counters |
| D. | all of the above |
| Answer» E. | |
| 2262. |
In a digital clock application, the basic frequency must be divided down to: |
| A. | 1 Hz. |
| B. | 60 Hz. |
| C. | 100 Hz. |
| D. | 1000 Hz. |
| Answer» B. 60 Hz. | |
| 2263. |
The devices that provide the means for a computer to communicate with the user or other computers are referred to as: |
| A. | CPU |
| B. | ALU |
| C. | I/O |
| D. | none of the above |
| Answer» D. none of the above | |
| 2264. |
The software used to drive microprocessor-based systems is called: |
| A. | assembly language |
| B. | firmware |
| C. | machine language code |
| D. | BASIC interpreter instructions |
| Answer» B. firmware | |
| 2265. |
The circuits in the 8085A that provide the arithmetic and logic functions are called the: |
| A. | CPU |
| B. | ALU |
| C. | I/O |
| D. | none of the above |
| Answer» C. I/O | |
| 2266. |
How many buses are connected as part of the 8085A microprocessor? |
| A. | 2 |
| B. | 3 |
| C. | 5 |
| D. | 8 |
| Answer» C. 5 | |
| 2267. |
What is the difference between a mnemonic code and machine code? |
| A. | There is no difference. |
| B. | Machine codes are in binary, mnemonic codes are in shorthand English. |
| C. | Machine codes are in shorthand English, mnemonic codes are in binary. |
| Answer» C. Machine codes are in shorthand English, mnemonic codes are in binary. | |
| 2268. |
Which of the following buses is primarily used to carry signals that direct other ICs to find out what type of operation is being performed? |
| A. | data bus |
| B. | control bus |
| C. | address bus |
| D. | address decoder bus |
| Answer» C. address bus | |
| 2269. |
The control bus and memories share a bidirectional bus in a typical microprocessor system. |
| A. | True |
| B. | False |
| Answer» C. | |
| 2270. |
Which bus is a bidirectional bus? |
| A. | address bus |
| B. | data bus |
| C. | address bus and data bus |
| D. | none of the above |
| Answer» C. address bus and data bus | |
| 2271. |
All computer programs for a machine are called: |
| A. | software |
| B. | firmware |
| C. | hardware |
| D. | none of the above |
| Answer» B. firmware | |
| 2272. |
The 8085A is a(n): |
| A. | 16-bit parallel CPU |
| B. | 8-bit serial CPU |
| C. | 8-bit parallel CPU |
| D. | none of the above |
| Answer» D. none of the above | |
| 2273. |
When was the first 8-bit microprocessor introduced? |
| A. | 1969 |
| B. | 1974 |
| C. | 1979 |
| D. | 1985 |
| Answer» C. 1979 | |
| 2274. |
What type of circuit is used at the interface point of an output port? |
| A. | decoder |
| B. | latch |
| C. | tristate buffer |
| D. | none of the above |
| Answer» C. tristate buffer | |
| 2275. |
What kind of computer program is used to convert mnemonic code to machine code? |
| A. | debug |
| B. | assembler |
| C. | C++ |
| D. | Fortran |
| Answer» C. C++ | |
| 2276. |
A register in the microprocessor that keeps track of the answer or results of any arithmetic or logic operation is the: |
| A. | stack pointer |
| B. | program counter |
| C. | instruction pointer |
| D. | accumulator |
| Answer» E. | |
| 2277. |
Which of the following are the three basic sections of a microprocessor unit? |
| A. | operand, register, and arithmetic/logic unit (ALU) |
| B. | control and timing, register, and arithmetic/logic unit (ALU) |
| C. | control and timing, register, and memory |
| D. | arithmetic/logic unit (ALU), memory, and input/output |
| Answer» C. control and timing, register, and memory | |
| 2278. |
Because microprocessor CPUs do not understand mnemonics as they are, they have to be converted to ________. |
| A. | hexadecimal machine code |
| B. | binary machine code |
| C. | assembly language |
| D. | all of the above |
| Answer» C. assembly language | |
| 2279. |
I/O mapped systems identify their input/output devices by giving them a(n) ________. |
| A. | 8-bit port number |
| B. | 16-bit port number |
| C. | 8-bit buffer number |
| D. | 8-bit instruction |
| Answer» B. 16-bit port number | |
| 2280. |
What type of circuit is used at the interface point of an input port? |
| A. | decoder |
| B. | latch |
| C. | tristate buffer |
| D. | none of the above |
| Answer» D. none of the above | |
| 2281. |
The register in the 8085A that is used to keep track of the memory address of the next op-code to be run in the program is the: |
| A. | stack pointer |
| B. | program counter |
| C. | instruction pointer |
| D. | accumulator |
| Answer» C. instruction pointer | |
| 2282. |
How many bits are used in the data bus? |
| A. | 7 |
| B. | 8 |
| C. | 9 |
| D. | 16 |
| Answer» C. 9 | |
| 2283. |
The items that you can physically touch in a computer system are called: |
| A. | software |
| B. | firmware |
| C. | hardware |
| D. | none of the above |
| Answer» D. none of the above | |
| 2284. |
Single-bit indicators that may be set or cleared to show the results of logical or arithmetic operations are the: |
| A. | flags |
| B. | registers |
| C. | monitors |
| D. | decisions |
| Answer» B. registers | |
| 2285. |
When referring to instruction words, a mnemonic is: |
| A. | a short abbreviation for the operand address |
| B. | a short abbreviation for the operation to be performed |
| C. | a short abbreviation for the data word stored at the operand address |
| D. | shorthand for machine language |
| Answer» C. a short abbreviation for the data word stored at the operand address | |
| 2286. |
The technique of assigning a memory address to each I/O device in the computer system is called: |
| A. | memory-mapped I/O |
| B. | ported I/O |
| C. | dedicated I/O |
| D. | wired I/O |
| Answer» B. ported I/O | |
| 2287. |
The ________ ensures that only one IC is active at a time to avoid a bus conflict caused by two ICs writing different data to the same bus. |
| A. | control bus |
| B. | control instructions |
| C. | address decoder |
| D. | CPU |
| Answer» D. CPU | |
| 2288. |
In the digital clock project, when does the PM indicator go high? |
| A. | Never |
| B. | Going from 11:59:59 to 12:00:00 |
| C. | Going from 12:59:59 to 01:00:00 |
| D. | On the falling edge of the clock after enable goes high |
| Answer» C. Going from 12:59:59 to 01:00:00 | |
| 2289. |
How is the output frequency related to the sampling interval of a frequency counter? |
| A. | Directly with the sampling interval |
| B. | Inversely with the sampling interval |
| C. | More precision with longer sampling interval |
| D. | Less precision with longer sampling interval |
| Answer» D. Less precision with longer sampling interval | |
| 2290. |
In an HDL application of a stepper motor, after an up/down counter is built what is done next? |
| A. | Build the sequencer |
| B. | Test it on a simulator |
| C. | Test the decoder |
| D. | Design an intermediate integer variable |
| Answer» C. Test the decoder | |