47502. Which step in this reduction process is using DeMorgan's theorem?
47503. The colour of light is determined by its?
47504. For a three-input NOR gate, with the input waveforms as shown below, which output waveform is correct?
47505. A LOW placed on the input of an inverter will produce a HIGH output.
47506. The SUBDESIGN section defines the input and output of the logic circuit block.
47507. The NAND gate is an example of combinational logic.
47508. The symbol shown below is an AND gate.
47509. The complement of 1 is 0.
47510. In VHDL, local signals are declared in the VARIABLE section, which is placed between the SUBDESIGN section and the logic section.
47511. The given figure shows the correct logic implementation of the distributive law.
47512. Boolean algebra was first applied to the analysis of digital circuits by Claude Shannon at Stanford University.
47513. The application of DeMorgan's theorems to a Boolean expression with double and single inversions produces a resultant expression that contains only single inverter signs over single variables.
47514. The timing diagram for a two-input NAND gate is shown below. The gate is working correctly.
47515. The truth table shown below describes the operation of a NOR gate.
47516. A two-input NAND gate has inputs of 1 and 0; the output is 0.
47517. A NAND gate consists of an AND gate and an OR gate connected in series with each other.
47518. In an expression containing both AND and OR operations, the AND operations are performed first (unless parentheses indicate otherwise).
47519. In a text-based language, the circuit being described must be given a name.
47520. The effect of an inverted output being connected to the inverting input of another gate is to effectively eliminate one of the inversions, resulting in a single inversion.
47521. A minimum of three universal NOR gates would be required to perform the logical operation of a 2-input AND gate.
47522. The Boolean expression for a three-input AND gate is X = ABC.
47523. Output logic levels for certain input conditions of a logic circuit may often be determined without using the Boolean expression.
47524. The comments in ADHL are enclosed between # characters.
47525. The expressions, , are equivalent.
47526. The output of a NAND gate is the inverse of the output for an AND gate for all possible input combinations.
47527. NOR gates can be used to construct AND gates.
47528. The commutative law of Boolean addition states that A + B = A · B.
47529. The figure given below is an example of the implementation of AND-OR-INVERT logic.
47530. The OR gate performs like two switches wired in a series.
47531. The inputs to an AND gate are: A = 1, B = 0, C = 1. The output will be LOW.
47532. In Boolean algebra, 1 · 0 = 0.
47533. Boolean multiplication is symbolized by A + B.
47534. VHDL is not a new language.
47535. The format used to present the logic output for the various combinations of logic inputs to a gate is called a(n):
47536. What is the basic difference between AHDL and VHDL?
47537. A small circle on the output of a logic gate is used to represent the:
47538. For a three-input OR gate, with the input waveforms as shown below, which output waveform is correct?
47539. Which of the figures given below represents a NOR gate?
47540. Add the following BCD numbers.
0110 0111 1001 0101 1000 1000
47541. Add the following hexadecimal numbers.
3C 14 3B +25 +28 +DC
47542. Solve this BCD problem: 0100 + 0110 =
47543. What are constants in VHDL code?
47544. The 2's-complement system is to be used to add the signed binary numbers 11110010 and 11110011. Determine, in decimal, the sign and value of each number and their sum.
47545. The most commonly used system for representing signed binary numbers is the:
47546. What is the major difference between half-adders and full-adders?
47547. The decimal value for E16 is:
47548. Fast-look-ahead carry circuits found in most 4-bit full-adder circuits:
47549. Add the following hex numbers: 011016 + 1001016