Digital Logic Design Unit 1 Questions & Answers

Digital Logic Design Unit 1 Questions & Answers (A+B)(A+C) - CORRECT ANSWER- A+BC A+~AB - CORRECT ANSWER- A+B A+AB= - CORRECT ANSWER- A Advantage of circuits to represent boolean functions: - CORRECT ANSWER- A circuit is an interconnection of components. Different circuits can represent the same function. Advantage: Circuit may represent an actual physical implementation of a Boolean function and that a circuit drawn graphically can enable quick and easy comprehension of a function by humans Advantage of equations to represent boolean functions: - CORRECT ANSWER- Equations: Boolean functions can be represented by equations. Different equations can represent the same function Advantage: equations can be manipulated using properties of Boolean algebra, enabling simplification of an equation, or proving that two equations represent the same function etc. Advantage of truth tables to represent boolean functions: - CORRECT ANSWER- Truth table shows all possible value combinations of those inputs Boolean function has only one truth table representation Advantage: a function has only one truth table representation so any other Boolean function representation can be converted to a truth table to determine whether different representations represent the same function. If two representations represent the same function, then their truth tables will be identical. Drawback: For a large number of inputs, the number of truth table rows can be very large AND gate with output inverted is equal to _______ with inputs inverted - CORRECT ANSWER- OR Associative - CORRECT ANSWER- (a+b)+c=a+(b+c) (ab)c=a(bc) Boolean Function - CORRECT ANSWER- mapping of each possible combination of values for the function's variables (the inputs) to either a 0 or 1 (the output) Can build an AND gate using _____ - CORRECT ANSWER- two pMOS transistors and two nMOS transistors Can build an OR gate using _____ - CORRECT ANSWER- two pMOS transistors and two nMOS transistors