Digital Electronics Set 3
On This Page
This set of Digital Electronics Multiple Choice Questions & Answers (MCQs) focuses on Digital Electronics Set 3
Q1 | Which of the following circuit parameters would be most likely to limit the maximum operating frequency of a flip-flop?
- setup and hold time
- clock pulse high and low time
- propagation delay time
- clock transition time
Q2 | What is the result of taking more samples during the quantization process?
- more errors in the analog-to-digital conversion
- more bit requirements
- more accurate signal representation
- more bit requirements and more accurate signal representation
Q3 | Which A/D conversion method has a fixed conversion time?
- single-slope analog-to-digital converter
- dual-slope analog-to-digital converter
- digital-ramp analog-to-digital converter
- successive-approximation analog-to-digital converter
Q4 | Which is a typical application of digital signal processing?
- noise elimination
- music signal processing
- image processing
- all of the above
Q5 | 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 ________.
- 12 v
- 120 mv
- 12 mv
- 0 v
Q6 | What do we call the manipulation of an analog signal in a digital domain?
- analog-to-digital conversion
- digital-to-analog conversion
- digital signal processing
- signal filtering
Q7 | How many address bits are needed to select all memory locations in the 2118 16K × 1 RAM?
- 8
- 10
- 14
- 16
Q8 | The check sum method of testing a ROM:
- indicates if the data in more than one memory location is incorrect.
- provides a means for locating and correcting data errors in specific memory locations.
- allows data errors to be pinpointed to a specific memory location.
- simply indicates that the contents of the rom are incorrect.
Q9 | Refer to the given figures (a) and (b). A logic analyzer is used to check the circuit in figure (a) and displays the waveforms shown in figure (b). The actual analyzer display shows all four data outputs, Q0-Q3. The analyzer's cursor is placed at position X and all four of the data output lines show a LOW level output. What is wrong, if anything, with the circuit?
- nothing is wrong, according to the display. the outputs are in the open state and should show zero output voltage.
- the circuit is in the read mode and the outputs, q0-q3, should reflect the contents of the memory at that address. the chip is defective; replace the chip.
- the circuit is in the mode and should be writing the contents of the selected address to q0–q3.
- the q0–q3 lines can be either low or high, since the chip is in the tristate mode in which case their level is unpredictable.
Q10 | What is the meaning of RAM, and what is its primary role?
- readily available memory; it is the first level of memory used by the computer in all of its operations.
- random access memory; it is memory that can be reached by any sub- system within a computer, and at any time.
- random access memory; it is the memory used for short-term temporary data storage within the computer.
- resettable automatic memory; it is memory that can be used and then automatically reset, or cleared, after being read from or written to.
Q11 | The storage element for a static RAM is the ________.
- diode
- resistor
- capacitor
- flip-flop
Q12 | In a DRAM, what is the state of R/W during a read operation?
- low
- high
- hi-z
- none of the above
Q13 | The condition occurring when two or more devices try to write data to a bus simultaneously is called ________.
- address decoding
- bus contention
- bus collisions
- address multiplexing
Q14 | The difference between a PLA and a PAL is:
- the pla has a programmable or plane and a programmable and plane, while the pal only has a programmable and plane.
- the pal has a programmable or plane and a programmable and plane, while the pla only has a programmable and plane.
- the pal has more possible product terms than the pla.
- pals and plas are the same thing.
Q15 | ALM is the acronym for ________.
- array logic matrix
- arithmetic logic module
- asynchronous local modulator
- adaptive logic module
Q16 | The GAL16V8 has:
- 16 dedicated inputs.
- 8 special function pins.
- 8 pins that are used as inputs or outputs.
- all of the above
Q17 | PALs tend to execute ________ logic.
- sap
- sop
- pla
- spd
Q18 | How many pins are in an EDF10K70 package?
- 70
- 140
- 240
- 532
Q19 | Convert hexadecimal value 16 to decimal.
- 2210
- 1610
- 1010
- 2010
Q20 | Convert the following decimal number to 8-bit binary.
- 101110112
- 110111012
- 101111012
- 101111002
Q21 | Convert binary 111111110010 to hexadecimal.
- ee216
- ff216
- 2fe16
- fd216
Q22 | Convert the binary number 1001.00102 to decimal.
- 90.125
- 9.125
- 125
- 12.5
Q23 | One hex digit is sometimes referred to as a(n):
- byte
- nibble
- grouping
- instruction
Q24 | Which of the following is the most widely used alphanumeric code for computer input and output?
- gray
- ascii
- parity
- ebcdic
Q25 | If a typical PC uses a 20-bit address code, how much memory can the CPU address?
- 20 mb
- 10 mb
- 1 mb
- 580 mb