Topic 7: Decoder Quiz

What is the primary function of a decoder in digital electronics?

• To perform arithmetic operations

• To convert binary data into a specific format

• To encode data into binary form

• To decode data from one form to another

How many inputs and outputs does a BCD-to-decimal decoder have?

• 1 input and 10 outputs

• 10 inputs and 4 outputs

• 4 inputs and 10 outputs

• 10 inputs and 1 output

A decoder typically has:

• More inputs than outputs

• An equal number of inputs and outputs

• More outputs than inputs

• Only one input and one output

If the input of a BCD to decimal decoder is 0101, which output would be activated?

• Output 5

• Output 9

• Output 7

• Output 8

How many 74LS139 IC is needed to create a 1 of 32 decoder?

• 1

• 2

• 3

• 4

Output O6 is low when the BCD input code is

• 0101

• 0100

• 0011

• 0110

Block A shown in the circuit is a BCD to decimal decoder. Which digit will be shown in the seven segment display if DCBA = 0111?

• 6

• 7

• 8

• 9

What is the input DCBA if the seven segment show a digit '2'?

• 0001

• 0010

• 0100

• 1000

What should I apply to the input DCBA to sound the buzzer?

• 1001

• 1100

• 1010

• 1000

How many inputs and how many outputs does a BCD-to-7-segment decoder has?

• 10 inputs and 4 outputs

• 4 inputs and 7 outputs

• 10 inputs and 7 outputs

• 1 input and 7 outputs