Q21. What is quantum error correction used for?
Correct: Noise removal
It protects against decoherence and noise.
Q22. What is a logical qubit?
Correct: Encoded qubit
Logical qubits are error-corrected qubits.
Q23. Which technology uses Josephson junctions?
Correct: Superconducting qubits
Superconducting qubits use Josephson junctions.
Q24. Which particle is trapped in ion-trap quantum computers?
Correct: Ion
Charged ions are used as qubits.
Q25. What is the no-cloning theorem?
Correct: States cannot be copied
Quantum states cannot be perfectly cloned.
Q26. What is a phase gate used for?
Correct: Change phase
Phase gates modify the phase of a qubit.
Q27. Which field combines physics and computer science?
Correct: Quantum computing
Quantum computing merges both fields.
Q28. What does NISQ stand for?
Correct: Noisy Intermediate-Scale Quantum
NISQ refers to current noisy quantum devices.
Q29. Which language is used for quantum programming by IBM?
Correct: Qiskit
IBM provides Qiskit framework.
Q30. Which company developed the Q# language?
Correct: Microsoft
Microsoft created Q#.
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