Digital Logic Design MCQs

Which logic gate is used for addition in digital circuits? A) AND B) OR C) XOR D) NOT Answer: C) XOR What is the basic building block of digital circuits? A) Transistor B) Capacitor C) Inductor D) Diode Answer: A) Transistor Which gate has an output that is the complement of its input? A) OR B) NOT C) XOR D) NAND Answer: B) NOT How many input combinations are possible for a 3-input logic gate? A) 4 B) 8 C) 16 D) 32 Answer: B) 8 Which logic gate is also known as the Universal Gate? A) OR B) NAND C) XOR D) NOR Answer: B) NAND In Boolean algebra, what is the complement of AND operation? A) OR B) NAND C) XOR D) NOT Answer: B) NAND What is the output of an XOR gate if both inputs are HIGH (1)? A) 0 B) 1 C) Depends on the circuit D) Undefined Answer: A) 0 Which logic gate is used for arithmetic operations in computers? A) AND B) OR C) XOR D) ALU Answer: D) ALU What is the Boolean expression for the OR operation? A) A’B’ B) AB C) A + B D) A ⊕ B Answer: C) A + B What is the truth table for a NOT gate? A) markdown Copy code A | Q —– 0 | 1 1 | 0 B) markdown Copy code A | Q —– 0 | 0 1 | 1 C) markdown Copy code A | Q —– 0 | 0 1 | 0 D) markdown Copy code A | Q —– 0 | 1 1 | 1 Answer: A) What is the Boolean equation for a NAND gate? A) A’B’ B) AB C) A + B D) A ⊕ B write more ChatGPT Sure, here are more multiple-choice questions (MCQs) on Digital Logic Design: What is the Boolean equation for a NAND gate? A) A’B’ B) AB C) A + B D) A ⊕ B Answer: A) A’B’ Which gate has an output of 1 only if all inputs are 0? A) AND B) OR C) XOR D) NOR Answer: D) NOR In a 4-bit binary adder, what is the maximum decimal sum possible? A) 7 B) 8 C) 15 D) 16 Answer: C) 15 Which logic gate is equivalent to the Boolean expression (A + B)’? A) NOT B) NAND C) XOR D) NOR Answer: B) NAND What is the output of an OR gate if both inputs are LOW (0)? A) 0 B) 1 C) Depends on the circuit D) Undefined Answer: A) 0 Which gate is known as the Exclusive-OR gate? A) AND B) OR C) XOR D) NOT Answer: C) XOR Which logic gate is represented by the expression A’B’ + AB? A) XOR B) NAND C) NOR D) XNOR Answer: D) XNOR What is the result of (A AND B) OR (A AND NOT B) in Boolean algebra? A) A B) B C) A XOR B D) A OR B Answer: A) A How many logic gates are required to implement a full adder circuit? A) 1 B) 2 C) 3 D) 4 Answer: C) 3 Which gate is used for comparing two binary numbers in digital circuits? A) AND B) OR C) XOR D) Comparator Answer: D) Comparator What is the main function of a flip-flop in digital circuits? A) Add two numbers B) Store a single bit of data C) Perform logical operations D) Convert analog to digital signals Answer: B) Store a single bit of data Which type of flip-flop has two stable states and requires two input signals? A) D flip-flop B) T flip-flop C) JK flip-flop D) SR flip-flop Answer: C) JK flip-flop What is the output of an SR flip-flop if both inputs S and R are HIGH (1)? A) Q = 0, Q’ = 0 B) Q = 1, Q’ = 1 C) Depends on the previous state D) Undefined Answer: D) Undefined Which logic gate is the complement of an AND gate? A) OR B) NOT C) XOR D) NAND Answer: D) NAND What is the function of a multiplexer (MUX) in digital circuits? A) Add two numbers B) Store a single bit of data C) Perform logical operations D) Select one of many inputs and route it to a single output Answer: D) Select one of many inputs and route it to a single output Which type of memory retains its data without power? A) SRAM B) DRAM C) ROM D) Flash Answer: C) ROM What is the advantage of using synchronous counters over asynchronous counters? A) Lower power consumption B) Faster operation C) Simpler design D) Easier to cascade Answer: B) Faster operation In a digital system, what does the term ‘clock cycle’ refer to? A) The time taken to execute one instruction B) The time between two consecutive clock pulses C) The speed of the processor D) The amount of data processed per second Answer: B) The time between two consecutive clock pulses Which logic gate has an output that is the complement of an XOR gate? A) NAND B) NOR C) XNOR D) AND Answer: C) XNOR What is the primary function of a decoder in digital circuits? A) Store data B) Perform arithmetic operations C) Generate a unique output code for each input pattern D) Convert analog signals to digital Answer: C) Generate a unique output code for each input pattern These questions cover various aspects of digital logic design, including basic gates, flip-flops, counters, and memory types. write more ChatGPT Certainly! Here are more multiple-choice questions (MCQs) on Digital Logic Design: Which type of logic gate is used to implement addition in binary arithmetic circuits? A) AND B) OR C) XOR D) NOT Answer: C) XOR What is the Boolean expression for the NOR gate? A) A’B’ B) AB C) A + B D) A ⊕ B Answer: A) A’B’ In a half adder circuit, what do SUM and CARRY represent? A) Sum and product of two binary numbers B) Result and overflow of addition operation C) Result and carry-over from addition of two binary digits D) Sum and difference of two binary numbers Answer: C) Result and carry-over from addition of two binary digits Which logic gate is equivalent to the Boolean expression A’B’ + AB? A) XOR B) NAND C) NOR D) XNOR Answer: D) XNOR What is the output of a NAND gate if both inputs are HIGH (1)? A) 0 B) 1 C) Depends on the circuit D) Undefined Answer: A) 0 Which logic gate is used for subtraction in digital circuits? A) AND B) OR C) XOR D) NOT Answer: C) XOR What is the Boolean equation for a NOR gate? A) A’B’ B) AB C) A + B D) A ⊕ B Answer: A) A’B’ How many possible combinations of inputs are there for a 4-input OR gate? A) 8 B) 12 C) 16 D) 24 Answer: C) 16 Which logic gate is represented by the expression (A + B)’? A) NOT B) NAND C) XOR D) NOR Answer: D) NOR In Boolean algebra, what is the complement of OR operation? A) AND B) NAND C) XOR D) NOT Answer: B) NAND What is the output of an XOR gate if both inputs are LOW (0)? A) 0 B) 1 C) Depends on the circuit D) Undefined Answer: A) 0 Which gate has an output of 0 only if all inputs are 1? A) AND B) OR C) XOR D) NOR Answer: A) AND What is the result of (A OR B) AND (A NAND B) in Boolean algebra? A) A B) B C) A XOR B D) A OR B Answer: A) A How many logic gates are required to implement a half adder circuit? A) 1 B) 2 C) 3 D) 4 Answer: B) 2 Which gate is used for selecting one of many inputs and routing it to a single output in digital circuits? A) AND B) OR C) XOR D) Multiplexer Answer: D) Multiplexer What is the primary function of a demultiplexer (DEMUX) in digital circuits? A) Store data B) Perform arithmetic operations C) Generate a unique output code for each input pattern D) Distribute one input to many outputs Answer: D) Distribute one input to many outputs Which type of flip-flop has a clock input and changes state only on a clock edge? A) D flip-flop B) T flip-flop C) JK flip-flop D) SR flip-flop Answer: A) D flip-flop What is the output of an SR flip-flop if both inputs S and R are LOW (0)? A) Q = 0, Q’ = 0 B) Q = 1, Q’ = 1 C) Depends on the previous state D) Undefined Answer: C) Depends on the previous state Which logic gate is the complement of a NOR gate? A) OR B) NOT C) XOR D) NAND Answer: A) OR What is the function of a shift register in digital circuits? A) Store data B) Perform arithmetic operations C) Generate clock pulses D) Convert analog signals to digital Answer: A) Store data

Digital Logic Design MCQs

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