Online Digital Electronics Test - Digital Electronics Test - Random



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Instruction:

  • Total number of questions : 20.
  • Time alloted : 30 minutes.
  • Each question carry 1 mark, no negative marks.
  • DO NOT refresh the page.
  • All the best :-).


1.

A major application for DSP is in ________ and ________ of analog signals.

A.
sending, receiving
B.
digitizing, weighting
C.
filtering, conditioning
D.
leveling, translating

Your Answer: Option (Not Answered)

Correct Answer: Option C

Learn more problems on : Interfacing to the Analog World

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2.

A group of 6 bits is also known as 1 byte.

A.
True
B.
False

Your Answer: Option (Not Answered)

Correct Answer: Option B

Learn more problems on : Memory and Storage

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3.

An 8-bit serial in/parallel out shift register is clocked at 4 MHz and is used to delay a serial digital signal by 1.25 s. The output that has the proper delay is ________.

A.
QE
B.
QF
C.
QG
D.
QH

Your Answer: Option (Not Answered)

Correct Answer: Option A

Learn more problems on : Shift Registers

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4.

The storage element for a static RAM is the ________.

A.
diode
B.
resistor
C.
capacitor
D.
flip-flop

Your Answer: Option (Not Answered)

Correct Answer: Option D

Learn more problems on : Memory and Storage

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5.

Which of the following is one of the basic characteristics of DRAMs?

A.
DRAMs must have a constantly changing input.
B.
DRAMs must be periodically refreshed in order to be able to retain data.
C.
DRAMs have a broader "dynamic" storage range than other types of memories.
D.
DRAMs are simpler devices than other types of memories.

Your Answer: Option (Not Answered)

Correct Answer: Option B

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6.

The FPLA has a programmable AND array and a programmable OR array.

A.
True
B.
False

Your Answer: Option (Not Answered)

Correct Answer: Option A

Learn more problems on : Programmable Logic Device

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7.

Using separate serial inputs for shifting left or shifting right is a major difference between the 74194 and other shift registers.

A.
True
B.
False

Your Answer: Option (Not Answered)

Correct Answer: Option A

Learn more problems on : Shift Registers

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8.

What decimal value is required to produce an output at "X" ?

A.
1
B.
1 or 4
C.
2
D.
5

Your Answer: Option (Not Answered)

Correct Answer: Option D

Learn more problems on : Counters

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9.

The abbreviation for an exclusive-OR gate is XOR.

A.
True
B.
False

Your Answer: Option (Not Answered)

Correct Answer: Option A

Learn more problems on : Combinational Logic Circuits

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10.

The simplified form of .

A.
True
B.
False

Your Answer: Option (Not Answered)

Correct Answer: Option B

Learn more problems on : Combinational Logic Circuits

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11.

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

Your Answer: Option (Not Answered)

Correct Answer: Option C

Learn more problems on : Microprocessor Fundamentals

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12.

A Karnaugh map is a systematic way of reducing which type of expression?

A.
product-of-sums
B.
exclusive NOR
C.
sum-of-products
D.
those with overbars

Your Answer: Option (Not Answered)

Correct Answer: Option C

Learn more problems on : Boolean Algebra and Logic Simplification

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13.

The commutative law of Boolean addition states that A + B = A × B.

A.
True
B.
False

Your Answer: Option (Not Answered)

Correct Answer: Option B

Learn more problems on : Boolean Algebra and Logic Simplification

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14.

What is gain error in a DAC?

A.
missing codes
B.
error in the slope of the output staircase waveform
C.
more or less input voltage is required for the first step than what is specified

Your Answer: Option (Not Answered)

Correct Answer: Option B

Learn more problems on : Interfacing to the Analog World

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15.

Zeros may be added to the left of the MSB to produce even groups of 4 bits when converting from binary to hexadecimal.

A.
True
B.
False

Your Answer: Option (Not Answered)

Correct Answer: Option A

Learn more problems on : Number Systems and Codes

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16.

Solve this binary problem: 01000110 ÷ 00001010 =

A.
0111
B.
10011
C.
1001
D.
0011

Your Answer: Option (Not Answered)

Correct Answer: Option A

Learn more problems on : Digital Arithmetic Operations and Circuits

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17.

The OR function is Boolean multiplication and the AND function is Boolean addition.

A.
True
B.
False

Your Answer: Option (Not Answered)

Correct Answer: Option B

Learn more problems on : Boolean Algebra and Logic Simplification

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18.

The last 96 locations in the internal data memory are reserved for general-purpose data storage and stack.

A.
True
B.
False

Your Answer: Option (Not Answered)

Correct Answer: Option B

Learn more problems on : The 8051 Microcontroller

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19.

The half-step sequence of a stepper motor is created by inserting a start with only one coil energized between full steps.

A.
True
B.
False

Your Answer: Option (Not Answered)

Correct Answer: Option A

Learn more problems on : Digital System Projects Using HDL

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20.

PMOS and NMOS ________.

A.
represent MOSFET devices utilizing either P-channel or N-channel devices exclusively within a given gate
B.
are enhancement-type CMOS devices used to produce a series of high-speed logic known as 74HC
C.
represent positive and negative MOS-type devices, which can be operated from differential power supplies and are compatible with operational amplifiers
D.
None of the above

Your Answer: Option (Not Answered)

Correct Answer: Option A

Learn more problems on : Logic Families and Their Characteristics

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