Online Digital Electronics Test - Digital Electronics Test 2

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.
How many binary bits are necessary to represent 748 different numbers?
9
7
10
8
Your Answer: Option
(Not Answered)
Correct Answer: Option

2.
SMT stands for small-to-medium technology.
True
False
Your Answer: Option
(Not Answered)
Correct Answer: Option

3.

The systems shown in the given figure transfer data ________.

serially
sequentially
in parallel
both serially and sequentially
Your Answer: Option
(Not Answered)
Correct Answer: Option

4.
Convert binary 11001111 to hexadecimal.
8F16
CE16
DF16
CF16
Your Answer: Option
(Not Answered)
Correct Answer: Option

5.
Zeros may be added to the left of the MSB to produce even groups of 4 bits when converting from binary to hexadecimal.
True
False
Your Answer: Option
(Not Answered)
Correct Answer: Option

6.
In binary, the decimal number 93 converts to ________ digits.
seven
eight
11
five
Your Answer: Option
(Not Answered)
Correct Answer: Option

7.
Which of the following gates has the exact inverse output of the OR gate for all possible input combinations?
NOR
NOT
NAND
AND
Your Answer: Option
(Not Answered)
Correct Answer: Option

8.
How many 2-input NOR gates does it take to produce a 2-input NAND gate?
1
2
3
4
Your Answer: Option
(Not Answered)
Correct Answer: Option

9.
A digital circuit that converts coded information into a familiar or non-coded form is known as an encoder.
True
False
Your Answer: Option
(Not Answered)
Correct Answer: Option

10.
In VHDL, each instance of a component is given a name followed by a semicolon and the name of the library primitive.
True
False
Your Answer: Option
(Not Answered)
Correct Answer: Option

11.
The postponed symbol () on the output of a flip-flop identifies it as being ________.
a D flip-flop
a J-K flip-flop
pulse triggered
trailing edge-triggered
Your Answer: Option
(Not Answered)
Correct Answer: Option

12.
Which of the following procedures could be used to check the parallel loading feature of a counter?
Preset the LOAD inputs, set the CLR to its active level, and check to see that the Q outputs match the values preset into the LOAD inputs.
Apply LOWs to the parallel DATA inputs, pulse the CLK input, and check for LOWs on all the Q outputs.
Apply HIGHs to all the DATA inputs, pulse the CLK and CLR inputs, and check to be sure that the Q outputs are all LOW.
Apply HIGHs to all the Q terminals, pulse the CLK, and check to see if the DATA terminals now match the Q outputs.
Your Answer: Option
(Not Answered)
Correct Answer: Option

13.
To design a divide-by-200 counter using synchronous counters, two 4-bit counters could be cascaded together to form an 8-bit counter.
True
False
Your Answer: Option
(Not Answered)
Correct Answer: Option

14.
The refresh period for capacitors used in DRAMs is ________.
2 ms
2 s
64 ms
64 s
Your Answer: Option
(Not Answered)
Correct Answer: Option

15.

The output of this circuit is always ________.

1
0  
A
A
Your Answer: Option
(Not Answered)
Correct Answer: Option

16.
An ALU is a multipurpose device capable of providing several different logic operations.
True
False
Your Answer: Option
(Not Answered)
Correct Answer: Option

17.
One of the first steps in any HDL project is to define its scope by naming each input and output.
True
False
Your Answer: Option
(Not Answered)
Correct Answer: Option

18.
In the stepper motor, the half-step sequence is used when ________.
less torque is needed
larger steps are desired
smaller steps are desirable
more torque is needed
Your Answer: Option
(Not Answered)
Correct Answer: Option

19.
What is the difference between the 74HC00 series and the 74HCT00 series of CMOS logic?
The HCT series is faster.
The HCT series is slower.
The HCT series is input and output voltage compatible with TTL.
The HCT series is not input and output voltage compatible with TTL.
Your Answer: Option
(Not Answered)
Correct Answer: Option

20.
Which of the following buses is primarily used to carry signals that direct other ICs to find out what type of operation is being performed?
data bus
control bus
address bus
address decoder bus
Your Answer: Option
(Not Answered)
Correct Answer: Option

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