# 6. DIGITAL ARITHMETIC OPERATIONS AND CIRCUITS.pdf - 1. For...

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1. For a 4-bit parallel adder, if the carry-in is connected to a logicalHIGH, the result is:10111001×0011×0111×1010A.the same as if the carry-in is tied LOW since the least significantcarry-in is ignored.B.that carry-out will always be HIGH.C.a one will be added to the final result.D.the carry-out is ignored.Answer:OptionC2. What is the first thing you will need if you are going to use amacrofunction?011001111001C3. Perform subtraction on each of the following binary numbers bytaking the two's-complement of the number being subtracted andthen adding it to the first number.01001011000001100111OptionB4. Solving11 + (2) will yield which two's-complement answer?A.1110 1101B.1111 1001C5. Multiply the following binary numbers.101010111001×0011×0111×10101011101010101010C6. Add the following BCD numbers.0110011110010001000101110111Answer:OptionD7. Add the following hexadecimal numbers.3C14+25+28+DC3B118117C8. Solve this BCD problem: 0100 + 0110 =A9. What are constants in VHDL code?

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