Description : Which of following are known as universal gates (A) NAND & NOR. (B) AND & OR. (C) XOR & OR. (D) None.
Last Answer : Ans: A NAND & NOR are known as universal gates, because any digital circuit can be realized completely by using either of these two gates.
Description : The output of a logic gate is 1 when all its inputs are at logic 0. the gate is either (A) a NAND or an EX-OR (B) an OR or an EX-NOR (C) an AND or an EX-OR (D) a NOR or an EX-NOR
Last Answer : (D) a NOR or an EX-NOR
Description : DeMorgan’s first theorem shows the equivalence of (A) OR gate and Exclusive OR gate. (B) NOR gate and Bubbled AND gate. (C) NOR gate and NAND gate. (D) NAND gate and NOT gate
Last Answer : (B) NOR gate and Bubbled AND gate.
Description : The gates required to build a half adder are (A) EX-OR gate and NOR gate (B) EX-OR gate and OR gate (C) EX-OR gate and AND gate (D) Four NAND gates.
Last Answer : (C) EX-OR gate and AND gate
Description : The NAND gate output will be low if the two inputs are (A) 00 (B) 01 (C) 10 (D) 11
Last Answer : (D) 11
Last Answer : A NAND gate is called a universal logic element because any logic function can be realized by NAND gates alone.
Description : Which TTL logic gate is used for wired ANDing (A) Open collector output (B) Totem Pole (C) Tri state output (D) ECL gates
Last Answer : Ans: A Open collector output.
Description : Which of the following is the universal gate? 1) NAND-Gate 2) OR-Gate 3) AND-Gate 4) NOT-Gate
Last Answer : 1) NAND-Gate
Description : Why NAND and NOR gate are called as universal gate? Draw AND gate using NAND gate only.
Last Answer : Universal gate - All basic gates functionality can be implemented using NAND and NOR gate hence these gates are called as universal gates. AND gate using NAND gate
Description : In a logic circuit the NOR and NAND gate functions ____________. A. must be accomplished with a common base transistor arrangement B. are available in diode form C. are exact opposites with the ... . have output conditions that are exact opposites to the output condition for OR and AND, respectively
Last Answer : Answer: D
Description : Which of the listed logic gates is considered to be a BASIC building block (basic logic gate) used in logic diagrams? A. NAND B. OR C. NOR D. All of the above.
Last Answer : Answer: B
Description : What is the equivalent logic gate of a two-input NAND gate with both inputs inverted?
Last Answer : OR gate.
Description : A NAND gate has inputs labeled as A, B, and C. If A and B are HIGH, C must be at what logic level to produce a HIGH output?
Last Answer : . Low.
Description : A NAND gate has Z and X as inputs. What will be the output logic level if Z is HIGH and X is LOW?
Last Answer : HIGH.
Description : Karnaugh map is used for the purpose of (A) Reducing the electronic circuits used. (B) To map the given Boolean logic function. (C) To minimize the terms in a Boolean expression. (D) To maximize the terms of a given a Boolean expression.
Last Answer : (C) To minimize the terms in a Boolean expression.
Description : When an input signal A=11001 is applied to a NOT gate serially, its output signal is (A) 00111. (B) 00110. (C) 10101. (D) 11001.
Last Answer : When an input signal A=01001 is applied to a NOT gate serially , it's output signal is
Description : The NOR gate output will be low if the two inputs are (A) 00 (B) 01 (C) 10 (D) 11
Last Answer : A
Description : Define combinational logic
Last Answer : When logic gates are connected together to produce a specified output for certain specified combinations of input variables, with no storage involved, the resulting circuit is called combinational logic.
Description : A full adder logic circuit will have (A) Two inputs and one output. (B) Three inputs and three outputs. (C) Two inputs and two outputs. (D) Three inputs and two outputs.
Last Answer : Ans: D A full adder circuit will add two bits and it will also accounts the carry input generated in the previous stage. Thus three inputs and two outputs (Sum and Carry) are there.
Description : The logic 0 level of a CMOS logic device is approximately (A) 1.2 volts (B) 0.4 volts (C) 5 volts (D) 0 volts
Last Answer : Ans: D CMOS logic low level is 0 volts approx.
Description : Which of the following is the fastest logic? (A) ECL (B) TTL (C) CMOS (D) LSI
Last Answer : (A) ECL
Description : In a positive logic system, logic state 1 corresponds to (A) positive voltage (B) higher voltage level (C) zero voltage level (D) lower voltage level
Last Answer : (B) higher voltage level We decide two voltages levels for positive digital logic. Higher voltage represents logic 1 & a lower voltage represents logic 0.
Description : The digital logic family which has the lowest propagation delay time is (A) ECL (B) TTL (C) CMOS (D) PMOS
Last Answer : Ans: A The digital logic family which has the lowest propagation delay time is ECL (Lowest propagation delay time is possible in ECL because the transistors are used in difference amplifier configuration, in which they are never driven into saturation and thereby the storage time is eliminated).
Description : Which of the following is the fastest logic (A) TTL (B) ECL (C) CMOS (D) LSI
Last Answer : Ans: B ECL is the fastest logic family of all logic families. (High speeds are possible in ECL because the transistors are used in difference amplifier configuration, in which they are never driven into saturation and thereby the storage time is eliminated.
Description : The digital logic family which has minimum power dissipation is (A) TTL (B) RTL (C) DTL (D) CMOS
Last Answer : (D) CMOS The digital logic family which has minimum power dissipation is CMOS. (CMOS being an unipolar logic family, occupy a very small fraction of silicon Chip area)
Description : What is Universal Logic Gate ?
Last Answer : AND, OR and NOT These three gates are called basic gates. Again, it is possible to make any logic circuit by combining these three gates. However, it is possible to create any circuit only with NAND ... gates only with NOR Gate . Hence NAND and NOR Gate are known as Universal Gate or Universal Gate.
Description : Why NAND Gate is called Public Gate ?
Last Answer : The gate through which the basic gates can be implemented is called universal gate. AND, OR and NOT gates can be implemented with NAND gate . That is why NAND gate is called universal gate.
Description : Explain why NAND Gate is a public gate. ?
Last Answer : The gate through which the basic gates can be implemented is called universal gate. Basic gates i.e. AND, OR and NOT gates can be implemented with NAND gate. As a result, NAND Gate is a universal gate .
Description : What is NAND Gate used for ?
Last Answer : Used to shorten all other gates
Description : What is the number of NAND gate IC ?
Last Answer : NAND gate IC number 7400
Description : How to get the effectiveness of NAND gate ?
Last Answer : If the signal emitted from the end gate flows through the knot gate, the nand gate is found to be effective.
Description : What is the output Boolean expression for a NAND gate with inputs A, B, and C?
Last Answer : C B A
Description : What must be the state of the inputs to a NAND gate in order to produce a LOW output?
Last Answer : All inputs must be HIGH.
Description : Sketch symbol of NAND gate and NOR gate.
Last Answer : Symbol of NAND gate and NOR gate
Description : For a NAND gate, when one or more inputs are low then the output will be A) Low B) High C) Alternately high and low D) High or low depending on relative magnitude of inputs
Last Answer : For a NAND gate, when one or more inputs are low then the output will be High
Description : Output of NAND gate is 0. for three inputs when:
Last Answer : Output of NAND gate is 0. for three inputs when: all the inputs are 1
Description : The output of a 2-input NAND gate with high at both the inputs will be • High • Low • High & low • None of the above.
Last Answer : The output of a 2-input NAND gate with high at both the inputs will be Low
Last Answer : A NAND gate is equivalent to an AND gate followed by an inverter.
Last Answer : The fan put of a 7400 NAND gate is 10TTL.
Last Answer : A NAND gate has: LOW inputs and a HIGH output
Description : What is the purpose of a NAND gate?
Last Answer : Nand gate has 2 inputs and only 1 output and it is equivalent of an and gate. The output of a nand gate is high(1) only when anyone or both inputs are low(0).and the output of nand gate is low(0) only when both the inputs are high(1).nand gate is also called as universal gate.
Description : What type of logic circuit is indicated by the truth table shown in the illustration? EL-0072 A. OR B. AND C. NOR D. NAND
Last Answer : Answer: A
Description : Which of the following logic operations is performed by the following given combinational circuit ? (A) EXCLUSIVE-OR (B) EXCLUSIVE-NOR (C) NAND (D) NOR
Last Answer : (A) EXCLUSIVE-OR
Description : What is the function of logic gate ?
Last Answer : Signals can be exchanged through binary arithmetic solutions.
Description : In a logic circuit, the NOT gate function _____________. A. does not alter a logical input B. serves to amplify a given signal level C. must be accomplished with a common collector transistor arrangement D. reverses an input logic condition
Description : Define Asynchronous sequential circuit?
Last Answer : In asynchronous sequential circuits change in input signals can affect memory element at any instant of time.
Description : Define synchronous sequential circuit
Last Answer : In synchronous sequential circuits, signals can affect the memory elements only at discrete instant of time.
Description : What are the different types of shift type?
Last Answer : There are five types. They are, Serial In Serial Out Shift Register Serial In Parallel Out Shift Register Parallel In Serial Out Shift Register Parallel In Parallel Out Shift Register Bidirectional Shift Register
Description : Define shift registers.
Last Answer : The binary information in a register can be moved from stage to stage within the register or into or out of the register upon application of clock ... arithmetic and logic operations used in microprocessors. This gives rise to group of registers called shift registers.
Description : Define registers.
Last Answer : A register is a group of flip-flops flip-flop can store one bit information. So an n-bit register has a group of n flip-flops and is capable of storing any binary information/number containing n-bits.