IBM A1000-088 - 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 be correlated in such a way that the state of one qubit instantaneously affects the state of another, regardless of distance?

A quantum developer needs to create a quantum circuit that puts a qubit in an equal superposition of |0⟩ and |1⟩ states. Which single-qubit gate should they apply to a qubit initialized in the |0⟩ state?

In IBM Qiskit, what is the primary purpose of the QuantumCircuit class?

Which industry application is quantum computing expected to significantly impact by optimizing complex route planning and logistics?

What does the Bloch sphere represent in quantum computing?

A researcher observes that their quantum algorithm's performance degrades over time due to interaction with the environment. What quantum phenomenon is primarily responsible for this degradation?

In quantum circuit design, what is the purpose of applying a CNOT (Controlled-NOT) gate?

A quantum developer needs to implement Grover's algorithm. What is the primary advantage this algorithm provides over classical search algorithms?

When using IBM Qiskit, which method is used to execute a quantum circuit on a simulator or real quantum hardware?

What is the purpose of transpilation in IBM Qiskit?

In the context of quantum computing applications, what is Variational Quantum Eigensolver (VQE) primarily used for?

A developer notices that measurement results from their quantum circuit show unexpected correlations between qubits that should be independent. What is the most likely cause?

What is the theoretical advantage of Shor's algorithm over classical factoring algorithms?

In quantum machine learning applications, what advantage might quantum computing provide over classical approaches?

What is the significance of quantum volume as a metric for quantum computers?

A quantum algorithm requires implementing a complex multi-qubit controlled operation. The target hardware only supports single-qubit gates and CNOT gates. What principle allows the algorithm to still be executed?

When implementing error mitigation techniques in IBM Qiskit, a developer applies readout error mitigation. What does this technique specifically address?

A financial institution wants to use quantum computing for portfolio optimization. Their problem involves finding the optimal allocation of assets subject to risk constraints. Which quantum approach is most suitable for this use case?

In the context of quantum error correction, what is the minimum number of physical qubits typically required to encode one logical qubit using the surface code?