Interview questions

Quantum Computing Interview Questions and Answers – Set 1

This is the first in series of practice tests / interview questions and answers in relation to Quantum computing. It touches upon the basic concepts in relation to some of the following:

  • Qubit
  • Difference between a bit and Qubit
  • Superposition of Qubit states
  • Quantum entanglement

This practice test will prove to be useful for Quantum Computing beginners / interns / freshers. 


Revision Notes – Quantum Computing Fundamentals

  • Quantum computing is different than classical computing. Problems which are suited for quantum computing should be considered for Quantum computing.
  • A Qubit is a two-state quantum mechanical system;
  • A Qubit can be in superposition of both the states at the same time.
  • A Qubit is similar to bit in the way that the measurement of Qubit has two possible outcomes, usually 0 and 1
  • A Qubit is different than bit in the way that a Qubit can be in a state which is a superposition of both 0 and 1
  • The two states in which a qubit may be measured are known as basis states (basis vectors)
  • In quantum mechanics, the Bloch sphere is a geometrical representation of the pure state space of a 2-level quantum system. The Bloch sphere is actually, geometrically, spherical in shape.
  • A Quantum logic gate can operate on a Qubit.
  • 8 Qubits = 1 Qubyte (Quantum Byte)
  • A Qubit can be measured with quantum register
  • A Qubit is different than bit due to following reasons:
    • It can have superposition of states, e.g., can be in both states (usually 0 and 1) at the same time.
    • Can be entangled with other Qubit
  • In case of 2-qubit system, it is not possible to determine state of individual qubit in the system as the states of the two qubits are entangled


Practice Test – Quantum Computing Fundamentals

[wp_quiz id=”6106″]


References

Ajitesh Kumar

I have been recently working in the area of Data analytics including Data Science and Machine Learning / Deep Learning. I am also passionate about different technologies including programming languages such as Java/JEE, Javascript, Python, R, Julia, etc, and technologies such as Blockchain, mobile computing, cloud-native technologies, application security, cloud computing platforms, big data, etc. I would love to connect with you on Linkedin. Check out my latest book titled as First Principles Thinking: Building winning products using first principles thinking.

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