Quantum Computing MCQs PDF

Quantum Computing - MCQs 1. In quantum computing, what is the basic unit of information? a) Giga b) Qubit c) Bit d) Byte Answer: Qubit 2. What do we call the pieces of information in a quantum computer? a) Bits b) Qubits c) Byte...

Quantum Computing - MCQs 1. In quantum computing, what is the basic unit of information? a) Giga b) Qubit c) Bit d) Byte Answer: Qubit 2. What do we call the pieces of information in a quantum computer? a) Bits b) Qubits c) Bytes d) Qubytes Answer: B 3. When the information is between 0 and 1 in a quantum computer, what do we call this? a) Superposition b) Same position c) Ordinary position d) Different position Answer: A 4. Quantum computers are very good at dealing with_____ a) Clarity b) Certainty c) Uncertainty d) Reliability Answer: C 5. What does 'entanglement' mean? a) Two particles are different b) Two particles are separate c) Two particles are independent d) Two particles are connected Answer: D 6. What can quantum computers be used for? a) Artificial Intelligence b) Simulations/Predictions c) Both (A) and (B) d) Google Docs and Slides Answer: C 7. When the two members of a Qubit pair exist in a single quantum state, it is known as ____________. a) Entanglement b) Engagement c) Superposition  d) None of the Above Answer: A 8. Quantum computing is relatively _________ than classical computing. a) Faster b) Slower c) Average d) None of the Above Answer: A 9. Qubit stands for ________ a) Quality bits b) Question bit c) Quantum gates d) Quantum bit Answer: D 10. A qubit is a _______quantum-mechanical system. a) One-state b) Two-state c) Three-state d) Four-state Answer: B 11. The set of vectors and set of scalars which follow the same properties followed by linear vector space is said be a. Basis b. Dimension c. Hilbert space d. Orthogonal state Answer: C 12. It is the process of replacing ith row of the matrix by ith column, then it is said to be ……. a. Conjugate Matrix b. Transpose Matrix c. Identity Matrix d. Hermitian Operator Answer: B 13. The operators change with time while the state vectors remain constant, then it is said to be a. Schrodinger representation b. Heisenberg representation c. Interaction representation d. None of the above Answer : B 14. The operators remain constant while the state vectors change with time, then it is said to be a. Schrodinger representation b. Heisenberg representation c. Interaction representation d. None of the above Answer : A 15. The diagonal entries of a Hermitian matrix must be a. Complex conjugate b. Real c. Both real & Complex conjugate d. None of the above Answer : B 16. The eigen value of a Hermitian matrix must be a. Complex conjugate b. Real c. Both real & Complex conjugate d. None of the above Answer : B 17. What is a vector space? a. A space consisting of only vectors b. A set of vectors closed under addition and scalar multiplication c. A space that includes both vectors and scalars d. A space that is always three-dimensional Answer: b. A set of vectors closed under addition and scalar multiplication 18. What is the dimension of a vector space? a. The size or length of a vector b. The number of vectors in the space c. The maximum number of linearly independent vectors that span the space d. The number of elements in the basis of the space Ans: c. The maximum number of linearly independent vectors that span the space 19. What is the span of a set of vectors? a. The set of all vectors in the vector space b. The linear combination of all vectors in the set c. The set of vectors that are orthogonal to the given set d. The set of vectors that are linearly independent Answer: b. The linear combination of all vectors in the set 20. In a finite-dimensional vector space, what is the maximum number of linearly independent vectors a basis can have? a. 0 b. 1 c. The dimension of the vector space d. The size of the vector space Answer: c. The dimension of the vector space 21. Moore's Law originally stated that the number of transistors on a microchip would double approximately every: a. 6 months b. 1 year c. 2 years d. 5 years Answer: c. 2 years 22. What fundamental technology trend enabled the continuation of Moore's Law for several decades? a. Miniaturization of transistors b. Increase in clock speed c. Expansion of data storage d. Advancements in software algorithms Answer: a. Miniaturization of transistors 23. Which component of a computer is primarily affected by Moore's Law? a. Central Processing Unit (CPU) b. Random Access Memory (RAM) c. Hard Disk Drive (HDD) d. Graphics Processing Unit (GPU) Answer: a. Central Processing Unit (CPU) 24. What is one of the main factors contributing to the end of Moore's Law? a. Decreased demand for computing power b. Physical limits of miniaturization c. Lack of innovation in software development d. Increasing costs of semiconductor production Answer: b. Physical limits of miniaturization 25. Which alternative approaches are being explored to extend computing power beyond the limits of Moore's Law? a. Quantum computing b. Neuromorphic computing c. Optical computing d. All of these Answer: d. All of these 26. What is the fundamental unit of information in quantum computing? a. Bit b. Byte c. Qubit d. Quantum gate Answer: c. Qubit 27. In classical computing, information is processed using bits. What are the two possible values for a classical bit? a. 0 and 1 b. True and False c. -1 and 1 d. Red and Blue Answer: a. 0 and 1 28. Which property allows qubits to represent multiple states simultaneously in quantum computing? a. Superposition b. Entanglement c. Interference d. Tunnelling Answer: a. Superposition 29. In a CNOT gate, you create a(n) _____ with two qubits. a. Superposition b. Entangled state c. Bloch d. Hadamard Answer: b. Entangled state 30. In a quantum circuit, this gate is used to place a qubit into superposition. a. Hadamard b. X-gate c. Bloch d. CNOT Answer: a. Hadamard 31. This quantum gate acts on a single qubit and would most be similar to a traditional NOT gate. a. CNOT b. X-Gate c. Hadamard d. Deutsch Gate Answer: b. X-Gate 32. What is superposition in quantum computing? a. A state in which a qubit can exist in multiple states simultaneously b. The process of entangling multiple qubits c. A gate used to manipulate qubits d. A unit of quantum information Answer: a. A state in which a qubit can exist in multiple states simultaneously 33. What happens to the entanglement of qubits when they are physically separated a. The entanglement is lost b. The entanglement remains intact c. The entanglement becomes stronger d. The entanglement becomes weaker Answer: b. The entanglement remains intact 34. What is the purpose of quantum gates in quantum computing? a. To entangle qubits b. To collapse superposition c. To manipulate qubits d. To measure qubit states Answer: c. To manipulate qubits 35. What does 'entanglement' mean? a) Two particles are different b) Two particles are separate c) Two particles are independent d) Two particles are connected Answer : d) Two particles are connected 36. A qubit is a _______quantum-mechanical system. a) One-state b) Two-state c) Three-state d) Four-state Answer : b) Two-state 37. What is the purpose of quantum gates in quantum computing? a) To entangle qubits b) To collapse superposition c) To manipulate qubits d) To measure qubit states Answer : C) To manipulate qubits 38. Quantum computers are very good at dealing with_____ a) Clarity b) Certainty c) Uncertainty d) Reliability Answer : C) Uncertainty 39. Pauli’s matrices are a) Unitary b) Reversible c) Both unitary and reversible d) None of the above Answer: (C) 40. If =1 is called a) Normalized b) Orthogonal c) Hermitian d) Orthonormal Answer: (a) 41. |0> and |1> are orthogonal if: a) They are perpendicular b) They are parallel c) Angle between them is 0 d) Linearly independent Answer: (A) 42. In a linear vector space, linearly dependent and linearly independent vectors are a) If all the scalars are equal to 0 and some scalars are not equal to 0. b) If some scalars are not equal to 0 and all the scalars are equal to 0. c) Both the case scalars are equal to 0 d) Both the case scalars are not equal to 0. Answer: (B) 43. Advantage of qubit over bit is, a) It works in spin up state b) It works in spin down state c) It also works in super posed state d) All the above Answer: (C) 44. Quantum gates are unitary in nature. Because of, a) Superposed state b) Spin up state c) Spin down state d) Normalization condition. Answer: (D) 45. Which quantum gate work as flip flop gate? a) Z gate b) Y gate c) X gate d) None of the above. Answer: (X) 46. Which quantum gate can take the qubit to super posed state? a) X gate b) Y gate c) Z gate d) Hadamard gate Answer: (D) 47. In |Ψ> = α|0>+ β|1>, α, β represents, a) Ground state and excited state b) Probability density c) Probability amplitude d) All the above Answer: (C) 48. In |Ψ> = α|0>+ β|1>, if α=1 then, a) Probability of finding the electron in the ground state is high b) Probability of finding the electron in the excited state is high c) Probability of finding the electron in the superposed state is high d) None of the above Answer: (A) 49. In |Ψ> = α|0>+ β|1>, if β =1 then, a) Probability of finding the electron in the ground state is high b) Probability of finding the electron in the excited state is high c) Probability of finding the electron in the superposed state is high d) None of the above Answer: (B) 1 50. In |Ψ>= α|0>+ β|1>, if α and β = √2 then, a) Probability of finding the electron in the ground state is high b) Probability of finding the electron in the excited state is high c) Probability of finding the electron in the superposed state is high d) None of the above Answer: (C) *********