IBM A1000-099: Assessment: Foundations of Quantum Computing Practice Exam: Test Your Knowledge 2025

What is the fundamental unit of quantum information that can exist in a superposition of states?

Which quantum phenomenon allows two or more qubits to have correlated states regardless of the distance between them?

A quantum algorithm researcher needs to prepare a qubit in an equal superposition state. Which single-qubit gate should be applied to a qubit initially in the |0⟩ state?

What happens to a qubit's quantum state when it is measured?

Which quantum gate is used to create entanglement between two qubits?

In the context of quantum computing, what does the Bloch sphere represent?

What is the primary purpose of Grover's algorithm?

A development team is building a quantum circuit on IBM Quantum Platform. They notice their circuit uses gates that are not native to the hardware. What process will IBM Quantum Platform perform before execution?

Which property distinguishes a universal quantum gate set?

What does the term 'decoherence' refer to in quantum computing?

A researcher runs a quantum circuit multiple times and obtains different measurement outcomes. What is the best explanation for this behavior?

In Qiskit, which component is responsible for executing quantum circuits on actual quantum hardware or simulators?

Which statement best describes Shor's algorithm?

A quantum circuit designer needs to apply a rotation around the Z-axis by π radians. Which gate accomplishes this?

What is the primary advantage of quantum annealing compared to gate-based quantum computing?

A quantum software developer observes that their quantum circuit's fidelity decreases significantly as circuit depth increases. What is the most likely primary cause?

In the context of variational quantum algorithms like VQE (Variational Quantum Eigensolver), what role does the classical computer play?

Which IBM Quantum tool provides a graphical interface for building quantum circuits by dragging and dropping gates?

A quantum algorithm implementation requires applying a controlled-phase gate between non-adjacent qubits on hardware with limited connectivity. What must be done to execute this operation?

What is the significance of quantum supremacy (or quantum advantage)?