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