Computer Electronics Digital Questions & Answers - Set 10 - ObjectiveBooks
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# Practice Test: Question Set - 10

1. A combinational logic circuit which is used when it is desired to send data from two or more source through a single transmission line is known as
(A) Encoder
(B) Decoder
(C) Multiplexer
(D) De-multiplexer

2. Which of the following is the first integrated logic family?
(A) RTL
(B) DTL
(C) TTL
(D) MOS

3. Conversion of decimal number 1310 to it's octal number equivalent is
(A) 158
(B) 178
(C) 138
(D) 118

4. A shift register can be used for
(A) Parallel to serial conversion
(B) Serial to parallel conversion
(C) Digital delay line
(D) All of the above

5. A NOR gate has two or more input signals. All input must be ________ to get a high output
(A) Low
(B) High
(C) Some low some high
(D) None of the above

6. Conversion of binary number 11000112 to its decimal number is
(A) 2910
(B) 9710
(C) 9910
(D) 9310

7. Conversion of decimal number 6110 to it's binary number equivalent is
(A) 1100112
(B) 110011102
(C) 1111012
(D) 111112

8. The highest decimal number that can be represented with 10 binary digits is
(A) 1023
(B) 1024
(C) 512
(D) All of the above

9. Conversion of binary number 1011012 to hexadecimal is
(A) 3716
(B) 2D16
(C) 2E16
(D) 2716

10. An XOR gate recognizes only words with an ________ number of 1's.
(A) Even
(B) Odd
(C) Different
(D) None of the above

11. Flip-flop outputs are always
(A) Complimentary
(B) The same
(C) Independent of each other
(D) Same as inputs

12. The XOR gates are ideal for testing parity because even-parity words produce a _______ output and odd-parity words produce a _______ output
(A) Low, high
(B) High, low
(C) Odd, even
(D) Even, odd

13. A diagram that illustrates the ore (Logic) of functions in a program called a
(A) Flowchart
(B) Sequence of steps
(C) Direction of flow
(D) None of the above

14. The 7400 series, also called standard TTL, contains a variety of SSI and _________ chips that allow us to build all kinds of digital circuits and systems.
(A) LSI
(B) MSI
(C) MOS
(D) MOSFET

15. Which logic family dissipates the minimum power?
(A) DTL
(B) TTL
(C) ECL
(D) CMOS

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