Online Digital Electronics Test - Digital Electronics Test 1

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.
What is the resultant binary of the decimal problem 49 + 01 = ?
01010101
00110101
00110010
00110001
Your Answer: Option
(Not Answered)
Correct Answer: Option

2.
Binary 10111111 is ________ in hexadecimal.
BF16
FB16
27716
10111111
Your Answer: Option
(Not Answered)
Correct Answer: Option

3.
An inverter output is the complement of its input.
True
False
Your Answer: Option
(Not Answered)
Correct Answer: Option

4.

The following waveform pattern is for a(n) ________.

2-input AND gate
2-input OR gate
Exclusive-OR gate
None of the above
Your Answer: Option
(Not Answered)
Correct Answer: Option

5.
The binary numbers A = 1100 and B = 1001 are applied to the inputs of a comparator. What are the output levels?
A > B = 1, A < B = 0, A < B = 1
A > B = 0, A < B = 1, A = B = 0
A > B = 1, A < B = 0, A = B = 0
A > B = 0, A < B = 1, A = B = 1
Your Answer: Option
(Not Answered)
Correct Answer: Option

6.
How many 3-line-to-8-line decoders are required for a 1-of-32 decoder?
1
2
4
8
Your Answer: Option
(Not Answered)
Correct Answer: Option

7.
A logic probe is placed on the output of a gate and the display indicator is dim. A pulser is used on each of the input terminals, but the output indication does not change. What is wrong?
The output of the gate appears to be open.
The dim indication on the logic probe indicates that the supply voltage is probably low.
The dim indication is a result of a bad ground connection on the logic probe.
The gate may be a tristate device.
Your Answer: Option
(Not Answered)
Correct Answer: Option

8.
When the output of the NOR gate S-R flip-flop is in the HOLD state (no change), the inputs are ________.
S = 1, R = 1
S = 1, R = 0
S = 0, R = 1
S = 0, R = 0
Your Answer: Option
(Not Answered)
Correct Answer: Option

9.
Most people would prefer to use ________ over HDL.
graphic descriptions
functions
VHDL
AHDL
Your Answer: Option
(Not Answered)
Correct Answer: Option

10.
Erasing or programming a flash memory device is a one-step operation.
True
False
Your Answer: Option
(Not Answered)
Correct Answer: Option

11.
DRAM uses a cross-transistor configuration.
True
False
Your Answer: Option
(Not Answered)
Correct Answer: Option

12.
Which is a mode of operation of the GAL16V8?
Simple mode
Complex mode
Registered mode
All of the above
Your Answer: Option
(Not Answered)
Correct Answer: Option

13.
Four subcategories of ASIC devices are available to create digital systems. These are PLDs, gate arrays, standard cells, and ________.
HCPLDs
full custom
GAL
FPLDs
Your Answer: Option
(Not Answered)
Correct Answer: Option

14.
A NAND gate consists of an AND gate and an OR gate connected in series with each other.
True
False
Your Answer: Option
(Not Answered)
Correct Answer: Option

15.
Solve this binary problem: 01000110 ÷ 00001010 =
0111
10011
1001
0011
Your Answer: Option
(Not Answered)
Correct Answer: Option

16.
Which is not a step used to define the scope of an HDL project?
Are the inputs and outputs active HIGH or active LOW?
A clear vision of how to make each block work
What are the speed requirements?
How many bits of data are needed?
Your Answer: Option
(Not Answered)
Correct Answer: Option

17.
When coming up with a strategy for dividing the overall project into manageable-size pieces one must ________.
name each input and output
fully understand how the device should operate
define successful completion of the project
know the nature of all the signals that interconnect all the pieces
Your Answer: Option
(Not Answered)
Correct Answer: Option

18.
In a real project, the first step of definition often involves some ________ on the part of the project manager.
time
skill
research
management
Your Answer: Option
(Not Answered)
Correct Answer: Option

19.
The stepper motor HDL will ignore its counter inputs and pass control inputs directly to the output when set in mode ________.
1
2
3
4
Your Answer: Option
(Not Answered)
Correct Answer: Option

20.
The output of a basic 4-bit input digital-to-analog converter would be capable of outputting:
16 different values of voltage or current that are not proportional to the input binary number
16 different values of voltage or current that are proportional to the input binary number
32 different values of voltage or current that are not proportional to the input binary number
32 different values of voltage or current that are proportional to the input binary number
Your Answer: Option
(Not Answered)
Correct Answer: Option

*** END OF THE TEST ***
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