# Quantum Computing MCQ Questions

This section focuses on "Basics" of Quantum Computing. These Multiple Choice Questions (MCQ) should be practiced to improve the Quantum Computing skills required for various interviews (campus interview, walk-in interview, company interview), placements, entrance exams and other competitive examinations.

1. Which phenomena of quantum mechanics used in Quantum computing?

A. superposition

B. interference

C. entanglement

D. All of the above

View Answer

Ans : D

Explanation: Quantum computing is a type of computation whose operations can harness the phenomena of quantum mechanics, such as superposition, interference, and entanglement.

2. Devices that perform quantum computations are known as?

A. quantimize

B. quantum computers

C. quantum devices

D. None of the above

View Answer

Ans : B

Explanation: Devices that perform quantum computations are known asÂ quantum computers

3. The study of quantum computing is a subfield of quantum information science.

A. TRUE

B. FALSE

C. Can be true or false

D. Can not say

View Answer

Ans : A

Explanation: True, The study of quantum computing is a subfield of quantum information science.

4. A qubit can be in a_________ quantum state

A. 0

B. 1

C. 1 or 0

D. Can not say

View Answer

Ans : C

Explanation: A qubit can be in a 1 or 0 quantum state, or in a superposition of the 1 and 0 states.

5. In which year first quantum computer (2-qubit) was created?

A. 1998

B. 2000

C. 2001

D. 2003

View Answer

Ans : A

Explanation: In 1998 Isaac Chuang of the Los Alamos National Laboratory, Neil Gershenfeld of the Massachusetts Institute of Technology (MIT), and Mark Kubinec of the University of California at Berkeley created the first quantum computer (2-qubit) that could be loaded with data and output a solution.

6. Who suggested that a quantum computer had the potential to simulate things a classical computer could not feasibly do?

A. Yuri Manin

B. Richard Feynman

C. and

D. Yuri Feynman

View Answer

Ans : C

Explanation: Richard Feynman and Yuri Manin later suggested that a quantum computer had the potential to simulate things a classical computer could not feasibly do

7. Who is the father of quantum computing?

A. Isaac Chuang

B. Neil Gershenfeld

C. Philip Glass

D. David Deutsch

View Answer

Ans : D

Explanation: David Deutsch

8. What do we call the pieces of information in a quantum computer?

A. Bits

B. Qubits

C. Bytes

D. Qubytes

View Answer

Ans : B

Explanation: Qubits

9. The study of the computational complexity of problems with respect to quantum computers is known as quantum complexity theory.

A. Yes

B. No

C. Can be yes or no

D. Can not say

View Answer

Ans : A

Explanation: Yes, The study of the computational complexity of problems with respect to quantum computers is known as quantum complexity theory.

10. In Quantum circuit, A memory consisting of n bits of information has _______ possible states.

A. 2n

B. n*n

C. n

D. 2^n

View Answer

Ans : D

Explanation: A memory consisting of n bits of information has 2^n possible states.

Discussion