Question 182 of 319

Which of the following is true of a digital logic gate?

.

  • A.  It has at least two inputs but only one output.
  • B.  It has many outputs and inputs.
  • C.  It has at least one or more inputs but only one output.
  • D.  It has at least one input and two outputs

Correct Answer: A

Explanation
Correct Option: C. It has at least one or more inputs but only one output. Detailed Explanation:
  1. Understanding Digital Logic Gates:
  2. Digital logic gates are fundamental building blocks of digital circuits. They perform basic logical functions that are essential for digital circuits. The most common types of logic gates include AND, OR, NOT, NAND, NOR, XOR, and XNOR.
  3. Inputs and Outputs:
  4. A digital logic gate typically takes one or more binary inputs (0s and 1s) and produces a single binary output. The output is determined by the type of gate and the combination of its inputs.
  5. Analyzing the Correct Option (C):
  6. Option C states that a digital logic gate has "at least one or more inputs but only one output." This is accurate because:
    • At least one input: Most gates require at least one input to function. For example, a NOT gate has one input, while an AND gate has two inputs.
    • Only one output: Regardless of the number of inputs, the output of a logic gate is always a single binary value (either 0 or 1). For instance, an AND gate with two inputs will produce one output based on the logical AND operation.
  7. Why Other Options Are Incorrect:
  8. Option A: "It has at least two inputs but only one output."
    • This option is incorrect because while some gates (like AND and OR) do have at least two inputs, not all gates require two inputs. For example, a NOT gate has only one input. Therefore, this statement is too restrictive.
  9. Option B: "It has many outputs and inputs."
    • This option is misleading. While some complex circuits may have multiple outputs, a single logic gate does not. Each individual gate has a defined number of inputs and outputs, typically one output. Thus, this statement does not accurately describe a standard logic gate.
  10. Option D: "It has at least one input and two outputs."
    • This option is incorrect because standard logic gates do not have two outputs. Each gate is designed to produce a single output based on its inputs. Some circuits may combine multiple gates to produce multiple outputs, but that does not apply to a single logic gate.
Common Pitfalls:
  • Confusing Gates with Circuits: Students may confuse the properties of individual gates with those of entire circuits. Remember, a single gate has one output.
  • Overgeneralizing Inputs: While many gates have multiple inputs, it is essential to recognize that some gates, like NOT, only require one input.
Revision Summary:
  • Digital logic gates have at least one input and only one output.
  • The output is determined by the logical operation performed by the gate.
  • Common types of gates include AND, OR, and NOT, each with specific input-output relationships.
  • Understanding the basic properties of gates is crucial for designing and analyzing digital circuits.
← Previous Next →
Jump to: 182 183 184 185 186 187 188 189 190 191