DE W6

The output expression for an AND-OR circuit having one AND gate with inputs A, B and C and one AND gate with inputs D, E and F is

• ABCDEF
• A+B+C+D+E+F
• ABC + DEF
• (A+B+C)(D+E+F)

A logic circuit with an output $X\ =\ \overline{\overline{AB}+\overline{ABC}}$  consist of

• two AND gates and one OR gate

• two AND gates, one OR gate and an inverter

• two AND gates, two OR gates and two inverters

• two AND gates, one OR gate and three inverters

To implement the expression $\overline{X}\overline{\ }\ \overline{Y\ }\ \overline{Z\ }+\overline{X}Y\overline{Z}+X\overline{Y}Z+\overline{X}YZ+XY\overline{Z}$   it takes

• five AND gates, one OR gates, and eight inverters

• four AND gates, two OR gates, and six inverters

• five AND gates, three OR gates, and seven inverters

• five AND gates, one OR gates, and seven inverters

The expression $\overline{A}BCD+ABC\overline{D}+A\overline{B}\ \overline{C}D$ 

• cannot be simplified

• can be simplified to A'BC + AB'

• can be simplified to ABCD' + A'BC'

• None of these answers is correct

The output expression for an AND-OR-Invert circuit having one AND gate with inputs A, B, C and another AND gate with inputs D, E, F is

• ABC + DEF
• (A+B+C)(D+E+F)
• (A' + B' + C')(D' + E' + F')
• A' + B' + C' + D' + E' + F'

An exclusive-NOR function is expressed as

• A'B' + AB
• A'B + AB'
• (A' + B)(A + B')
• (A' + B')(A + B)

The AND operation can be produced with

• two NAND gates
• three NAND gates
• one NOR gate
• three NOR gates

The OR operation can be produced with

• two NOR gates
• two NAND gates
• four NAND gates

When using dual symbols in a logic diagram,

• bubble outputs are connected to bubble inputs
• the NOR symbols represent the negative-AND operations
• the negative-OR symbols equal to the NAND operations
• All of these answers are true.
• None of these answers is true.

All Boolean expressions can be implemented with

• NAND gates only

• NOR gates only

• combinations of NAND and NOR gates

• combinations of AND gates, OR gates, and inverters