Online Digital Electronics Test - Digital Electronics Test 8
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.
Convert the following decimal number to 8-bit binary.
35
35
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Learn more problems on : Number Systems and Codes
2.
A byte has 8 bits.
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Learn more problems on : Number Systems and Codes
3.
If the output of an enable circuit must be HIGH when the circuit is disabled, should an AND gate or an OR gate be used for the circuit?
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Learn more problems on : Logic Gates
4.
A variable is a symbol used to represent a logical quantity that can have a value of 1 or 0.
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Learn more problems on : Boolean Algebra and Logic Simplification
5.
The terminal marked A on the CTR block in the given figure is the SET terminal.
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Learn more problems on : Counters
6.
RAMs must have a
input, in addition to data in.

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Learn more problems on : Memory and Storage
7.
The most widespread application of ROMs is in the storage of data and program codes that must be available on power-down in the microprocessor-based systems. These data and program codes are called firmware because they are firmly stored in hardware.
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Learn more problems on : Memory and Storage
8.
The Boolean sum of the four product terms is called the sum-of-products.
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Learn more problems on : Programmable Logic Device
9.
The ________ is the most popular standard logic device family today.
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Learn more problems on : Programmable Logic Device
10.
What is the result of taking more samples during the quantization process?
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Learn more problems on : Digital Signal Processing
11.
Polling is the process of pausing the normal sequence of instructions to cause the processor to execute a separate set of I/O instructions instead.
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Learn more problems on : Computers
12.
If [A] = 1011 1010, [B] = 0011 0110, and [C] = [A] [B], what is [C 4..2] in decimal?
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Learn more problems on : Digital Arithmetic Operations and Circuits
13.
Refer to the display multiplexer given below. The MSD display is blank, while the LSD seems to be OK. The input and output lines to the 74157 and 7449 are checked with a scope and can be seen changing levels. The A input on the 74139 also changes; however, the 0 output on the 74139 is always LOW and the 1 output is always HIGH. The B and EN inputs on the 74139 are always LOW. What could cause the problem and what should be done to correct it?
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Learn more problems on : MSI Logic Circuits
14.
In order to select data input I5 of a 74151 eight-line multiplexer, the select inputs must be ________.
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Learn more problems on : MSI Logic Circuits
15.
In the keypad HDL encoder, as long as all columns are high the ring counter is enabled and counting.
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Learn more problems on : Digital System Projects Using HDL
16.
Which of the following characterizes an analog quantity?
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Learn more problems on : Interfacing to the Analog World
17.
Sample-and-hold circuits in A/D converters are designed to:
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Learn more problems on : Interfacing to the Analog World
18.
A binary-weighter resistor DAC is practical only up to a resolution of ________.
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Learn more problems on : Interfacing to the Analog World
19.
PMOS and NMOS ________.
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Learn more problems on : Logic Families and Their Characteristics
20.
A single Schmitt trigger inverter is all that is needed to build a simple astable multivibrator.
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Learn more problems on : Multivibrators and 555 Timer
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