Full Adder Logic Quiz

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Questions and Answers

What is the purpose of a Full Adder in digital circuits?

  • To generate random bits
  • To perform multiplication operations
  • To add three inputs and produce two outputs (correct)
  • To divide input bits into smaller segments

Which logical expression represents the output SUM of a Full Adder?

  • (A OR B) AND C-IN
  • (A XOR B) OR C-IN (correct)
  • A XOR B
  • A AND B

What does the C-OUT output of a Full Adder represent?

  • It is the carry-in bit
  • It is the sum of the inputs A and B
  • It is the majority 1's detector (correct)
  • It is the exclusive OR of A and B

How many operands does a 1-bit full adder add?

<p>Three operands (D)</p>
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What is the primary reason for using a Full Adder instead of a 1-bit half-adder?

<p>To handle a carry-in bit during addition (D)</p>
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Which equation correctly represents the output C-OUT of a Full Adder?

<p>(A AND B) OR C-IN (C)</p>
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What is the primary purpose of a Full Adder in digital logic?

<p>Add two bits together and handle carry operations (D)</p>
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How many NOR gates are required to implement a Full Adder using NOR gates?

<p>9 (C)</p>
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What is a disadvantage of a Full Adder in digital logic according to the text?

<p>Higher complexity and more parts needed (C)</p>
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In what applications are Full Adders commonly used in digital logic?

<p>Data encryption and decryption (B)</p>
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What is the advantage of a Full Adder over a Half Adder in digital logic?

<p>'Carry input' for adding multi-bit numbers (B)</p>
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How are multiple Full Adders connected to add multi-bit binary numbers?

<p>In chains to add multiple bits separately (C)</p>
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Flashcards

Purpose of a Full Adder?

Adds three inputs (A, B, and carry-in) and produces two outputs (sum and carry-out).

What is C-OUT?

It is a majority 1's detector. Represents the carry-out bit.

How many operands for 1-bit Full Adder?

It adds three operands: two input bits (A and B) and a carry-in bit (C-IN).

Why use a Full Adder?

Handles carry-in bit from previous stage addition, enabling multi-bit addition.

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C-OUT equation?

C-OUT = (A AND B) OR (C-IN AND (A XOR B))

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What does a Full Adder do?

Adds two bits together and handles carry operations.

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Full Adder Advantage?

Full Adder includes a 'carry input' for multi-bit number addition.

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Connect multiple Full Adders?

Chained together, carry-out of one adder connects to carry-in of the next.

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Full Adder Disadvantage?

Higher complexity and more components are needed compared to simpler adders.

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