2291 + Mcqs in Digital Electronics Page 30 McqOptions

1451.	A NAND gate can function as a negative-OR gate.
A.	True
B.	False
Answer» B. False

Discussion

1452.	An AND gate is a universal gate.
A.	True
B.	False
Answer» C.

Discussion

1453.	The symbol shown represents ________.
A.	AND-OR logic
B.	AOI logic
C.	XOR gate
D.	XNOR gate
Answer» B. AOI logic

Discussion

1454.	To design a divide-by-200 counter using synchronous counters, two 4-bit counters could be cascaded together to form an 8-bit counter.
A.	True
B.	False
Answer» B. False

Discussion

1455.	The output of this circuit is always ________.
A.	1
B.	0
C.	A
D.	<span style="text-decoration:overline">A</span>
Answer» D. <span style="text-decoration:overline">A</span>

Discussion

1456.	An ALU is a multipurpose device capable of providing several different logic operations.
A.	True
B.	False
Answer» B. False

Discussion

1457.	One of the first steps in any HDL project is to define its scope by naming each input and output.
A.	True
B.	False
Answer» B. False

Discussion

1458.	In the stepper motor, the half-step sequence is used when ________.
A.	less torque is needed
B.	larger steps are desired
C.	smaller steps are desirable
D.	more torque is needed
Answer» D. more torque is needed

Discussion

1459.	What is the difference between the 74HC00 series and the 74HCT00 series of CMOS logic?
A.	The HCT series is faster.
B.	The HCT series is slower.
C.	The HCT series is input and output voltage compatible with TTL.
D.	The HCT series is not input and output voltage compatible with TTL.
Answer» D. The HCT series is not input and output voltage compatible with TTL.

Discussion

1460.	How many 3-line-to-8-line decoders are required for a 1-of-32 decoder?
A.	1
B.	2
C.	4
D.	8
Answer» D. 8

Discussion

1461.	The binary numbers A = 1100 and B = 1001 are applied to the inputs of a comparator. What are the output levels?
A.	A > B = 1, A < B = 0, A < B = 1
B.	A > B = 0, A < B = 1, A = B = 0
C.	A > B = 1, A < B = 0, A = B = 0
D.	A > B = 0, A < B = 1, A = B = 1
Answer» D. A > B = 0, A < B = 1, A = B = 1

Discussion

1462.	A logic probe is placed on the output of a gate and the display indicator is dim. A pulser is used on each of the input terminals, but the output indication does not change. What is wrong?
A.	The output of the gate appears to be open.
B.	The dim indication on the logic probe indicates that the supply voltage is probably low.
C.	The dim indication is a result of a bad ground connection on the logic probe.
D.	The gate may be a tristate device.
Answer» B. The dim indication on the logic probe indicates that the supply voltage is probably low.

Discussion

1463.	Most people would prefer to use ________ over HDL.
A.	graphic descriptions
B.	functions
C.	VHDL
D.	AHDL
Answer» B. functions

Discussion

1464.	Erasing or programming a flash memory device is a one-step operation.
A.	True
B.	False
Answer» C.

Discussion

1465.	DRAM uses a cross-transistor configuration.
A.	True
B.	False
Answer» C.

Discussion

1466.	Which is a mode of operation of the GAL16V8?
A.	Simple mode
B.	Complex mode
C.	Registered mode
D.	All of the above
Answer» E.

Discussion

1467.	A NAND gate consists of an AND gate and an OR gate connected in series with each other.
A.	True
B.	False
Answer» C.

Discussion

1468.	Solve this binary problem: 01000110 00001010 =
A.	0111
B.	10011
C.	1001
D.	0011
Answer» B. 10011

Discussion

1469.	Four subcategories of ASIC devices are available to create digital systems. These are PLDs, gate arrays, standard cells, and ________.
A.	HCPLDs
B.	full custom
C.	GAL
D.	FPLDs
Answer» C. GAL

Discussion

1470.	When coming up with a strategy for dividing the overall project into manageable-size pieces one must ________.
A.	name each input and output
B.	fully understand how the device should operate
C.	define successful completion of the project
D.	know the nature of all the signals that interconnect all the pieces
Answer» E.

Discussion

1471.	In a real project, the first step of definition often involves some ________ on the part of the project manager.
A.	time
B.	skill
C.	research
D.	management
Answer» D. management

Discussion

1472.	The stepper motor HDL will ignore its counter inputs and pass control inputs directly to the output when set in mode ________.
A.	1
B.	2
C.	3
D.	4
Answer» B. 2

Discussion

1473.	The output of a basic 4-bit input digital-to-analog converter would be capable of outputting:
A.	16 different values of voltage or current that are not proportional to the input binary number
B.	16 different values of voltage or current that are proportional to the input binary number
C.	32 different values of voltage or current that are not proportional to the input binary number
D.	32 different values of voltage or current that are proportional to the input binary number
Answer» C. 32 different values of voltage or current that are not proportional to the input binary number

Discussion

1474.	The following waveform pattern is for a(n) ________.
A.	2-input AND gate
B.	2-input OR gate
C.	Exclusive-OR gate
D.	None of the above
Answer» B. 2-input OR gate

Discussion

1475.	The ASCII code is a special code that represents all alphanumeric data.
A.	True
B.	False
Answer» B. False

Discussion

1476.	The simplified form of .
A.	True
B.	False
Answer» B. False

Discussion

1477.	A group of 6 bits is also known as 1 byte.
A.	True
B.	False
Answer» C.

Discussion

1478.	A 4-bit stairstep-ramp A/D converter has a clock frequency of 100 kHz and maximum input voltage of 10 V.
A.	The maximum number of samples per second will be 6250.
B.	The maximum sample rate will be 100,000 samples/second.
C.	The minimum sample rate will be 6250 samples/second.
D.	The minimum sample rate will be 100,000 samples/second.
Answer» D. The minimum sample rate will be 100,000 samples/second.

Discussion

1479.	A LOW placed on the input of an inverter will produce a HIGH output.
A.	True
B.	False
Answer» B. False

Discussion

1480.	In VHDL, the architecture declaration always begins with the ________ of variable signals or components that will be used in the concurrent description between BEGIN and END.
A.	type
B.	vectors
C.	functions
D.	declarations
Answer» E.

Discussion

1481.	The NAND gate is an example of combinational logic.
A.	True
B.	False
Answer» B. False

Discussion

1482.	When decimal numbers with several digits are to be added together using BCD adders ________.
A.	a separated BCD adder is required for each digit position
B.	the BCD adders must have the carry-outs grounded
C.	the BCD's must be grouped in twos
D.	full adders are also used
Answer» B. the BCD adders must have the carry-outs grounded

Discussion

1483.	The binary adder circuit is designed to add ________ binary number(s) at a time.
A.	1
B.	3
C.	2
D.	5
Answer» D. 5

Discussion

1484.	The 74HC382 ALU can perform ________ operations.
A.	2
B.	4
C.	8
D.	16
Answer» D. 16

Discussion

1485.	Subtraction of the 2's-complement system actually involves the operation of ________.
A.	multiplication
B.	subtraction
C.	addition
D.	division
Answer» D. division

Discussion

1486.	BCD arithmetic is performed using base 10 numbers.
A.	True
B.	False
Answer» C.

Discussion

1487.	A full adder has a carry-in.
A.	True
B.	False
Answer» B. False

Discussion

1488.	The greater the propagation delay, the higher the maximum frequency.
A.	True
B.	False
Answer» C.

Discussion

1489.	The complement of 1 is 0.
A.	True
B.	False
Answer» B. False

Discussion

1490.	The speed-power product provides a basis for the comparison of logic circuits when power dissipation and propagation delay are important considerations in the selection of the type of logic to be used.
A.	True
B.	False
Answer» B. False

Discussion

1491.	The 74F-Fast TTL integrated-circuit fabrication technique uses reduced interdevice ________ to achieve reduced propagation delays.
A.	noise
B.	resistance
C.	capacitance
D.	inductance
Answer» D. inductance

Discussion

1492.	ECL IC technology is faster than TTL technology.
A.	True
B.	False
Answer» B. False

Discussion

1493.	Hexadecimal is a base 4 numbering system.
A.	True
B.	False
Answer» C.

Discussion

1494.	The solution to the binary problem 00110110 00011111 is 00011000.
A.	True
B.	False
Answer» C.

Discussion

1495.	Unused TTL inputs should be tied LOW.
A.	True
B.	False
Answer» C.

Discussion

1496.	In a DIP the spacing between pins is typically ________.
A.	5 mils
B.	10 mils
C.	50 mils
D.	100 mils
Answer» E.

Discussion

1497.	P-MOS and N-MOS ________.
A.	represent MOSFET devices utilizing either P-channel or N-channel devices exclusively within a given gate
B.	are enhancement-type CMOS devices used to produce a series of high-speed logic known as 74HC
C.	represent positive and negative MOS-type devices that can be operated from differential power supplies and are compatible with operational amplifiers
D.	None of the above are.
Answer» B. are enhancement-type CMOS devices used to produce a series of high-speed logic known as 74HC

Discussion

1498.	________ is about twice as fast as P-MOS.
A.	CMOS
B.	DMOS
C.	MOD
D.	N-MOS
Answer» E.

Discussion

1499.	The output stage of a TTL gate is a special design called ________.
A.	multiemitter
B.	totem-pole
C.	MSI
D.	DIP
Answer» C. MSI

Discussion

1500.	A ________ is a testing and troubleshooting tool that generates a short-duration pulse when manually activated, usually by depressing a push button.
A.	cattle prod
B.	jimmy rod
C.	logic pulser
D.	bilateral switch
Answer» D. bilateral switch

Discussion

Explore topic-wise MCQs in Engineering.

A NAND gate can function as a negative-OR gate.

An AND gate is a universal gate.

The symbol shown represents ________.

To design a divide-by-200 counter using synchronous counters, two 4-bit counters could be cascaded together to form an 8-bit counter.

The output of this circuit is always ________.

An ALU is a multipurpose device capable of providing several different logic operations.

One of the first steps in any HDL project is to define its scope by naming each input and output.

In the stepper motor, the half-step sequence is used when ________.

What is the difference between the 74HC00 series and the 74HCT00 series of CMOS logic?

How many 3-line-to-8-line decoders are required for a 1-of-32 decoder?

The binary numbers A = 1100 and B = 1001 are applied to the inputs of a comparator. What are the output levels?

A logic probe is placed on the output of a gate and the display indicator is dim. A pulser is used on each of the input terminals, but the output indication does not change. What is wrong?

Most people would prefer to use ________ over HDL.

Erasing or programming a flash memory device is a one-step operation.

DRAM uses a cross-transistor configuration.

Which is a mode of operation of the GAL16V8?

A NAND gate consists of an AND gate and an OR gate connected in series with each other.

Solve this binary problem: 01000110 00001010 =

Four subcategories of ASIC devices are available to create digital systems. These are PLDs, gate arrays, standard cells, and ________.

When coming up with a strategy for dividing the overall project into manageable-size pieces one must ________.

In a real project, the first step of definition often involves some ________ on the part of the project manager.

The stepper motor HDL will ignore its counter inputs and pass control inputs directly to the output when set in mode ________.

The output of a basic 4-bit input digital-to-analog converter would be capable of outputting:

The following waveform pattern is for a(n) ________.

The ASCII code is a special code that represents all alphanumeric data.

The simplified form of .

A group of 6 bits is also known as 1 byte.

A 4-bit stairstep-ramp A/D converter has a clock frequency of 100 kHz and maximum input voltage of 10 V.

A LOW placed on the input of an inverter will produce a HIGH output.

In VHDL, the architecture declaration always begins with the ________ of variable signals or components that will be used in the concurrent description between BEGIN and END.

The NAND gate is an example of combinational logic.

When decimal numbers with several digits are to be added together using BCD adders ________.

The binary adder circuit is designed to add ________ binary number(s) at a time.

The 74HC382 ALU can perform ________ operations.

Subtraction of the 2's-complement system actually involves the operation of ________.

BCD arithmetic is performed using base 10 numbers.

A full adder has a carry-in.

The greater the propagation delay, the higher the maximum frequency.

The complement of 1 is 0.

The speed-power product provides a basis for the comparison of logic circuits when power dissipation and propagation delay are important considerations in the selection of the type of logic to be used.

The 74F-Fast TTL integrated-circuit fabrication technique uses reduced interdevice ________ to achieve reduced propagation delays.

ECL IC technology is faster than TTL technology.

Hexadecimal is a base 4 numbering system.

The solution to the binary problem 00110110 00011111 is 00011000.

Unused TTL inputs should be tied LOW.

In a DIP the spacing between pins is typically ________.

P-MOS and N-MOS ________.

________ is about twice as fast as P-MOS.

The output stage of a TTL gate is a special design called ________.

A ________ is a testing and troubleshooting tool that generates a short-duration pulse when manually activated, usually by depressing a push button.