# Digital System Design (Mc1406) Quiz 2

10 Questions | Total Attempts: 107  Settings  • 1.
Express the decimal number –37 as an 8-bit number in sign-magnitude.
• A.

10100101

• B.

00100101

• C.

11011000

• D.

11010001

• 2.
Derive the Boolean expression for the logic circuit shown below: Which one do you like?
• A.

C(A+B)DE

• B.

[C(A+B)D+E

• C.

[[C(A+B)D]E]

• D.

ABCDE

• 3.
If a 3-input NOR gate has eight input possibilities, how many of those possibilities will result in a HIGH output?
• A.

1

• B.

2

• C.

7

• D.

8

• 4.
Convert the binary number 1001.00102 to decimal
• A.

90.125

• B.

9.125

• C.

125

• D.

12.5

• 5.
What is the function of an enable input on a multiplexer chip?
• A.

to apply Vcc

• B.

To connect ground

• C.

To active the entire chip

• D.

To active one half of the chip

• 6.
How many inputs are required for a 1-of-10 BCD decoder?
• A.

4

• B.

8

• C.

10

• D.

1

• 7.
Select the statement that best describes the parity method of error detection.
• A.

Parity checking is best suited for detecting double bit errors that occur during the transmission of codes from one location to another

• B.

Parity checking is not suitable for detecting single bit errors in transmitted codes.

• C.

Parity checking is best suitable for detecting single bit errors in transmitted codes.

• D.

Parity checking is capable of detecting and correcting errors in transmitted codes.

• 8.
Which statement below best describes a Karnaugh map?
• A.

A Karnaugh map can be used to replace Boolean rules.

• B.

The Karnaugh map eliminates the need for using NAND and NOR gates.

• C.

Variable complements can be eliminated by using Karnaugh maps.

• D.

Karnaugh maps provide a cookbook approach to simplifying Boolean expressions.

• 9.
Which of the examples below expresses the distributive law of Boolean algebra?
• A.

(A + B) + C = A + (B + C)

• B.

A(B + C) = AB + AC

• C.

A + (B + C) = AB + AC

• D.

A(BC) = (AB) + C

• 10.
How many 2-input NOR gates does it take to produce a 2-input NAND gate?
• A.

1

• B.

2

• C.

3

• D.

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