Virtual Labs

a: A BCD to decimal decoder with inputs 0,1,1,1 b: A binary to decimal encoder with inputs 0,1,1,1 c: A decimal to binary decoder with inputs 1,1,1,0 d: A decimal to BCD encoder with inputs 1,1,1,0

Which statement below best describes the function of a decoder?

a: Decoders are special ICs that are used to make it possible for one brand of computer to talk to another. b: A decoder will convert a binary number into a specific output representing a particular character or digit. c: A decoder will convert a decimal number into a proper binary equivalent. d: Decoders are used to prevent improper operation of digital system.

What is the application of BCD to decimal decoder IC?

a: Inverter b: Buffer c: Adder d: LED Driver

The other name of BCD is

a: Packet decimal b: Binary decimal c: Hexagonal decimal d: Excess-3 code

One way to convert BCD to binary using the hardware approach is

a: By using MSI IC circuits. b: By using a keyboard encoder. c: By using an ALU. d: By using UART.

A decoder can be used as a demultiplexer by

a: Trying all enable pins LOW. b: Trying all data-select lines LOW. c: Trying all data-select lines HIGH. d: Using the input lines for data selection and an enable line for data input.

The main advantage of BCD code over other codes is

a: Solving an arithmetic question in BCD is much faster. b: Number of bits is reduced. c: Decimal number can easily be decoded. d: There is no wastage of bits in BCD.

Can positive and negative integers be represented in BCD?

a: No b: Yes c: Not sure d: Don’t know

To represent a 3-digit decimal number in BCD, the minimum number of bits required are

a: 4 b: 12 c: 8 d: 6

To deal with currency which of the following codes is preferred?

a: Excess-3 code b: Binary code c: Gray code d: BCD code

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