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Online Digital Electronics Test - Digital Electronics Test - Random

Instruction:
  • This is a FREE online test. Beware of scammers who ask for money to attend this test.
  • Total number of questions: 20.
  • Time allotted: 30 minutes.
  • Each question carries 1 mark; there are no negative marks.
  • DO NOT refresh the page.
  • All the best!

Marks : 2/20

Total number of questions
20
Number of answered questions
0
Number of unanswered questions
20
Test Review : View answers and explanation for this test.
1.
A DAC changes ________.
an analog signal into digital data
digital data into an analog signal
digital data into an amplified signal
none of the above
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Learn more problems on : Digital Concepts
2.
Give the decimal value of binary 10010.
610
910
1810
2010
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Learn more problems on : Digital Concepts
3.
Convert decimal 213 to binary.
11001101
11010101
01111001
11100011
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Learn more problems on : Number Systems and Codes
4.
The VHDL editor provided with a schematic editor development system will produce a file with the extension .vhd, which can be used by the simulator to test the output of the logic design.
True
False
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Correct Answer: Option
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Learn more problems on : Boolean Algebra and Logic Simplification
5.
When is a flip-flop said to be transparent?
when the Q output is opposite the input
when the Q output follows the input
when you can see through the IC packaging
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Learn more problems on : Flip-Flops
6.
What is the significance of the J and K terminals on the J-K flip-flop?
There is no known significance in their designations.
The J represents "jump," which is how the Q output reacts whenever the clock goes high and the J input is also HIGH.
The letters were chosen in honor of Jack Kilby, the inventory of the integrated circuit.
All of the other letters of the alphabet are already in use.
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Learn more problems on : Flip-Flops
7.
A positive edge-triggered D flip-flop will store a 1 when ________.
the D input is HIGH and the clock transitions from HIGH to LOW
the D input is HIGH and the clock transitions from LOW to HIGH
the D input is HIGH and the clock is LOW
the D input is HIGH and the clock is HIGH
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Learn more problems on : Flip-Flops
8.
For a multistage counter to be truly synchronous, the ________ of each stage must be connected to ________.
Cp, the same clock input line
CE, the same clock input line
, the terminal count output
, both clock input lines
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Learn more problems on : Counters
9.
Four cascaded modulus-10 counters have an overall modulus of ________.
10
100
1,000
10,000
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Learn more problems on : Counters
10.
When a computer is executing a program of instructions, the CPU will ________ memory locations as dictated by the program instructions.
format
scan
store data into
verify
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Learn more problems on : Memory and Storage
11.
What is occurring when two or more sources of data attempt to use the same bus?
Bus contention
Direct memory access
Bus interruption
PPI
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Learn more problems on : Computers
12.
Divide the following binary numbers.
0000  0010    0000  0010    1000  1111
0000  0010    0001  0010    0000  0100
0000  0011    0000  0010    0000  0100
0000  0010    0000  0010    0000  0100
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Learn more problems on : Digital Arithmetic Operations and Circuits
13.
When the 2's-complement system is used, the number to be subtracted is changed to its 2's complement and then added to the minuend.
True
False
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Learn more problems on : Digital Arithmetic Operations and Circuits
14.
The AD7524, a CMOS IC available from several IC manufacturers, is an eight-bit D/A converter that uses a(n) ________.
sample-and-hold circuit
R/2R ladder network
multiplexer
10 s clock
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Learn more problems on : Interfacing to the Analog World
15.
An indication of cutoff in an NPN bipolar transistor is that the:
collector current is maximum
collector-to-emitter voltage equals zero
base-to-emitter voltage equals 0.7 V
collector to emitter appears to be open
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Learn more problems on : Signals and Switches
16.
Why is parallel data transmission preferred over serial data transmission for most applications?
It is much slower.
It is cheaper.
More people use it.
It is much faster.
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Learn more problems on : Signals and Switches
17.
Which type of gate can be used to add two bits?
Ex-OR
Ex-NOR
Ex-NAND
NOR
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Learn more problems on : Ex-OR and Ex-NOR Gates
18.
The devices that provide the means for a computer to communicate with the user or other computers are referred to as:
CPU
ALU
I/O
none of the above
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Learn more problems on : Microprocessor Fundamentals
19.
When the 8051 is reset and the EA line is LOW, the program counter points to the first program instruction in the:
internal code memory
external code memory
internal data memory
external data memory
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Learn more problems on : The 8051 Microcontroller
20.
The total external data memory that can be interfaced to the 8051 is:
32K
64K
128K
256K
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Learn more problems on : The 8051 Microcontroller
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