Quantum Computing – The Future of Computing MCQs 50 Score: 0 Attempted: 0/50 Subscribe 1. : What is the fundamental unit of information in quantum computing? (A) Byte (B) Bit (C) Qubit (D) Photon 2. : Which phenomenon allows a qubit to be in multiple states at once? (A) Polarization (B) Entanglement (C) Decoherence (D) Superposition 3. : Which property of quantum particles allows qubits to be linked regardless of distance? (A) Coherence (B) Entanglement (C) Spin (D) Tunneling 4. : What is the major challenge in building scalable quantum computers? (A) High electricity cost (B) Lack of programming languages (C) Qubit decoherence (D) Absence of cloud support 5. : Who is considered one of the pioneers of quantum computing for proposing quantum gates? (A) Richard Feynman (B) David Deutsch (C) Peter Shor (D) Alan Turing 6. : What algorithm, developed by Peter Shor, can factor large numbers exponentially faster than classical computers? (A) Deutsch’s Algorithm (B) Grover’s Algorithm (C) Shor’s Algorithm (D) Simon’s Algorithm 7. : What quantum algorithm is used for unstructured database searching? (A) Shor’s Algorithm (B) Grover’s Algorithm (C) Deutsch’s Algorithm (D) Bell’s Algorithm 8. : Which tech company developed the quantum processor called “Sycamore”? (A) IBM (B) Microsoft (C) Google (D) Intel 9. : What programming framework does IBM use for quantum computing? (A) Cirq (B) Qiskit (C) Q# (D) QuTiP 10. : Which quantum computing model is based on quantum annealing? (A) IBM Q (B) Microsoft Q# (C) D-Wave (D) Google Sycamore 11. : What is quantum decoherence? (A) Stabilizing qubits for long time (B) Making qubits classical (C) Loss of quantum behavior due to environment (D) Cooling qubits to zero 12. : What is the key advantage of quantum computing over classical computing? (A) Lower power consumption (B) Better user interface (C) Parallelism through superposition (D) Smaller physical size 13. : What term describes quantum error caused by environmental interference? (A) Noise (B) Latency (C) Error rate (D) Entanglement 14. : Which of the following is a quantum programming language by Microsoft? (A) Q# (B) Qiskit (C) Q++ (D) Quantum-Python 15. : What type of particle behavior is exploited in quantum computing? (A) Newtonian (B) Classical (C) Quantum mechanical (D) Thermodynamic 16. : Which of the following is not a use case of quantum computing? (A) Cryptography (B) Weather forecasting (C) Gaming graphics (D) Drug discovery 17. : What hardware component is crucial for controlling qubits in a quantum computer? (A) Laser system (B) Magnetic coil (C) Cryogenic refrigerator (D) Resistor 18. : What is the Heisenberg uncertainty principle related to in quantum computing? (A) Computational limits (B) Measurement limitations (C) Bit flip errors (D) Data storage 19. : What is a Hadamard gate used for? (A) Creating entanglement (B) Measuring qubit spin (C) Initiating superposition (D) Resetting qubits 20. : What is the state of a qubit called before measurement? (A) Collapsed state (B) Classical state (C) Superposed state (D) Zero state 21. : What is quantum supremacy? (A) Quantum computers replacing classical computers (B) Performing a task classical computers can’t do in reasonable time (C) Dominance in military quantum tech (D) Supremacy in data storage 22. : Which company first claimed to achieve quantum supremacy in 2019? (A) IBM (B) Intel (C) Google (D) Microsoft 23. : What does “coherence time” mean in quantum computing? (A) Time to power on qubits (B) Time qubit retains its state (C) Time to perform a computation (D) Time for measurement 24. : What quantum computing model uses logic gates like classical computers? (A) Quantum annealing model (B) Adiabatic model (C) Gate-based model (D) Topological model 25. : What is used to cool quantum processors? (A) Liquid nitrogen (B) Liquid oxygen (C) Dilution refrigerator (D) Helium fan 26. : Which quantum concept allows faster factorization in Shor’s algorithm? (A) Quantum tunneling (B) Superposition (C) Quantum Fourier transform (D) Measurement collapse 27. : What is a key benefit of quantum entanglement? (A) Easy replication (B) Secure communication (C) Qubit heating (D) Better voltage control 28. : Which industry is expected to benefit most from quantum optimization algorithms? (A) Banking (B) Aviation (C) Logistics and supply chain (D) Food processing 29. : What does the Bloch sphere represent? (A) A quantum server (B) Qubit states geometrically (C) Heat dissipation in qubits (D) Entanglement diagrams 30. : What is quantum teleportation? (A) Transferring data over Wi-Fi (B) Moving objects physically (C) Transmitting quantum states (D) Real-time cloud syncing 31. : Which of these is a quantum cloud computing platform? (A) Amazon QubitNet (B) Google Cloud Quantum (C) IBM Quantum Experience (D) Microsoft QuantumLink 32. : What does QKD stand for in quantum communication? (A) Quantum Key Distribution (B) Quantum Knowledge Device (C) Quick Key Deployment (D) Quantum Kinetic Dynamics 33. : What is a qudit? (A) Classical replacement of qubit (B) Qubit with more than 2 levels (C) Measurement tool (D) Memory gate 34. : What quantum computing term refers to the transformation of qubit states? (A) Rotation (B) Transition (C) Quantum gate (D) Dephasing 35. : Which of these uses trapped ion technology for quantum computing? (A) IBM (B) Honeywell (C) D-Wave (D) Microsoft 36. : What is the expected impact of quantum computing on cryptography? (A) Strengthen current encryption (B) Break many current encryption schemes (C) Replace digital signatures (D) Remove need for passwords 37. : What is the unit of quantum information entropy? (A) Byte (B) Shannon (C) Qubit (D) Bit 38. : In quantum computing, what is the process of measuring a qubit known to cause? (A) Superposition (B) Collapse (C) Dephasing (D) Noise 39. : What kind of problem is Grover’s algorithm best suited for? (A) Optimization (B) Sorting (C) Searching (D) Factorizing 40. : What makes classical error correction ineffective in quantum systems? (A) Lack of binary states (B) Quantum no-cloning theorem (C) Inability to cool qubits (D) High power consumption 41. : What technology is needed to simulate quantum systems accurately? (A) Artificial Intelligence (B) Blockchain (C) Quantum Computers (D) GPUs 42. : What is the Pauli-X gate equivalent to in classical computing? (A) NOT gate (B) AND gate (C) OR gate (D) NAND gate 43. : Which term refers to the quantum version of a classical circuit? (A) Q-circuit (B) Quantum schema (C) Quantum logic circuit (D) Super circuit 44. : What challenge does quantum error correction address? (A) Increasing qubit size (B) Slowing computation (C) Protecting quantum states from decoherence (D) Overheating 45. : What is the main reason quantum computing is not yet mainstream? (A) Lack of skilled developers (B) Lack of Internet support (C) Technical challenges in stability and scaling (D) No funding 46. : Who first proposed quantum computing in the 1980s? (A) Alan Turing (B) Peter Shor (C) Richard Feynman (D) David Deutsch 47. : What kind of architecture is used in gate-based quantum computing? (A) Register-based (B) Grid-based (C) Circuit-based (D) Tree-based 48. : Which branch of physics does quantum computing fundamentally rely on? (A) Relativity (B) Thermodynamics (C) Quantum mechanics (D) Electromagnetism 49. : What organization launched the OpenQASM language? (A) Google (B) IBM (C) Microsoft (D) D-Wave 50. : Which of the following is a quantum advantage example? (A) Faster email processing (B) Faster integer addition (C) Solving prime factorization exponentially faster (D) Booting faster than classical systems