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Code Converters And Multiplexers Online Exam Quiz

Important questions about Code Converters And Multiplexers. Code Converters And Multiplexers MCQ questions with answers. Code Converters And Multiplexers exam questions and answers for students and interviews.

1. Which digital system translates coded characters into a more useful form?

Options

A : encoder

B : display

C : counter

D : decoder

2. A basic multiplexer principle can be demonstrated through the use of a:

Options

A : single-pole relay

B : DPDT switch

C : rotary switch

D : linear stepper

3. Why can a CMOS IC be used as both a multiplexer and a demultiplexer?

Options

A : It cannot be used as both.

B : CMOS uses bidirectional switches.

C :

D :

4. From the following list of input conditions, determine the state of the five output leads on a 74148 octal-to-binary encoder. I 0 = 1 I 3 = 1 I 6 = 1 I 1 = 1 I 4 = 0 I 7 = 1 I 2 = 1 I 5 = 1 EI = 0

Options

A : GS = L, A 0 = L, A 1 = L, A 2 = H, EO = H

B : GS = L, A 0 = H, A 1 = L, A 2 = L, EO = H

C : GS = L, A 0 = L, A 1 = H, A 2 = L, EO = H

D : GS = L, A 0 = H, A 1 = H, A 2 = L, EO = H

5. Use the weighting factors to convert the following BCD numbers to binary. 0101 0011        0010 0110 1000

Options

A : 01010011    001001101000

B : 11010100    100001100000

C : 110101        100001100

D : 101011        001100001

6. A circuit that responds to a specific set of signals to produce a related digital signal output is called a(n):

Options

A : BCD matrix

B : display driver

C : encoder

D : decoder

7. How many select lines would be required for an 8-line-to-1-line multiplexer?

Options

A : 2

B : 3

C : 4

D : 8

8. What control signals may be necessary to operate a 1-line-to-16 line decoder?

Options

A : flasher circuit control signal

B : a LOW on all gate enable inputs

C : input from a hexadecimal counter

D : a HIGH on all gate enable circuits

9. In a BCD-to-seven-segment converter, why must a code converter be utilized?

Options

A : to convert the 4-bit BCD into 7-bit code

B : to convert the 4-bit BCD into 10-bit code

C : to convert the 4-bit BCD into Gray code

D : No conversion is necessary.

10. When two or more inputs are active simultaneously, the process is called:

Options

A : first-in, first-out processing

B : priority encoding

C : ripple blanking

D : first-in, first-out processing or priority encoding

1. A microcontroller differs from a microprocessor in that it has several ________ ports and ________ built into its architecture, making it better suited for ________ applications.

Options

A : communication, PROMs, control

B : parallel, logic gates, processing

C : input/output, memory, control

D : data, memory, decoding

2. The primary use for Gray code is:

Options

A : coded representation of a shaft's mechanical position

B : turning on/off software switches

C : to represent the correct ASCII code to indicate the angular position of a shaft on rotating machinery

D : to convert the angular position of a shaft on rotating machinery into hexadecimal code

3. How many inputs are required for a 1-of-10 BCD decoder?

Options

A : 4

B : 8

C : 10

D : 1

4. What is the function of an enable input on a multiplexer chip?

Options

A : to apply V cc

B : to connect ground

C : to active the entire chip

D : to active one half of the chip

5. Why is a demultiplexer called a data distributor?

Options

A : The input will be distributed to one of the outputs.

B : One of the inputs will be selected for the output.

C : The output will be distributed to one of the inputs.

D :

6. A binary code that progresses such that only one bit changes between two successive codes is:

Options

A : nine's-complement code

B : 8421 code

C : excess-3 code

D : Gray code

7. A truth table with output columns numbered 0?15 may be for which type of decoder IC?

Options

A : hexadecimal 1-of-16

B : dual octal outputs

C : binary-to-hexadecimal

D : hexadecimal-to-binary

8. In a Gray code, each number is 3 greater than the binary representation of that number.

Options

A : True

B : False

C :

D :

9. How many inputs will a decimal-to-BCD encoder have?

Options

A : 4

B : 8

C : 10

D : 16

10. How many inputs are required for a 1-of-16 decoder?

Options

A : 2

B : 4

C : 8

D : 16

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