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DEchapter8

True/False
Indicate whether the statement is true or false.
 

 1. 
Combinational logic functions such as adders, multiplexers, and decoders are useful only in combination and part of more complex circuitry.
 

 2. 
As part of approaching a system design process, the outputs can be described verbally unless there are a large number of outputs, in which case they can be described in a truth table form.
 

 3. 
Binary multiplication is typically implemented as a series of repeated shifted additions.
 

 4. 
Individual components can be integrated at a system level.
 

 5. 
Traditional methods of designing a digital circuit such as the use of truth tables or K-maps become much less complicated to use when a system exceeds four inputs.
 

Multiple Choice
Identify the choice that best completes the statement or answers the question.
 

 6. 
In the design process, after the inputs and outputs of the system have been adequately described, a ______ or flow chart showing the solution from a high level could be drawn.
a.
calcout
c.
schematic
b.
block diagram
d.
truth table
 

 7. 
Adders, multiplexers, decoders, and other ______ are useful for performing the tasks for which they are designed.
a.
arithmetic applications
c.
Max/Min functions
b.
combinational logic functions
d.
problem-solving techniques
 

 8. 
One of the most important aspects of any ______ , and one that is most often overlooked, is the need to understand the problem in its entirety.
a.
control line
c.
word problem
b.
solution
d.
schematic
 

 9. 
______ is circuitry (or gates) whose purpose is to connect more complex blocks of a larger circuit
a.
Tri-state buffer
c.
XOR
b.
Gate-by-gate
d.
Glue logic
 

 10. 
Inputs whose purpose is to control something in the circuit rather than directly affecting the output are referred to as:
a.
control lines
c.
enable signals
b.
control inputs
d.
gate-by-gate inputs
 

 11. 
The ______ is the number in a multiplication problem that is multiplied by each digit in the multiplier.
a.
multiplier block
c.
multiplexer
b.
output value
d.
multiplicand
 

 12. 
______ are useful in breaking a large problem into smaller, more manageable components.
a.
Hierarchical blocks
c.
Calcout blocks
b.
Combinational logic functions
d.
Tri-state buffers
 

 13. 
In the following multiplication problem what is the multiplier?
    15
x 43
  645
a.
15
c.
both 15 and 43
b.
43
d.
645
 

 14. 
Developing a(n) ______ of a system will allow smaller, more manageable pieces of the project to be built rather than thinking of the whole design at once.
a.
truth table
c.
block diagram
b.
input structure
d.
control line
 

 15. 
The process of designing an output block, called _____, begins with a new Hierarchical Block.
a.
multiplier block
c.
block diagram
b.
input structure
d.
calcout
 

 16. 
Many larger combinational circuits involve a final process of selecting certain outputs or the need to enable or disable its outputs; tri-state buffers typically are used for this purpose although in some cases it may be advantageous to use:
a.
logic gates
c.
control lines
b.
system level components
d.
multiplexers
 

 17. 
Typical examples of control lines include:
a.
K-maps
c.
enable signals
b.
truth tables
d.
calcout
 

 18. 
______ such as adders, multiplexers, and decoders are useful on their own and in combination as part of more complex circuitry.
a.
Enable signals
c.
Control lines
b.
System level components
d.
Combinational logic functions
 

 19. 
It is possible to troubleshoot errors within a large circuit by carefully reviewing:
a.
combinational circuits
c.
digital circuits
b.
subcircuits
d.
problem statements
 

 20. 
______ can serve as a basic building block within a circuit.
a.
Magnitude comparators
c.
Multiplier blocks
b.
Segment display drivers
d.
Subcircuits
 



 
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