Which one of the following is the context in which the term “qubit” is mentioned ?
Show answer
Answer: B. A qubit (quantum bit) is the basic unit of information in quantum computing. Unlike a normal bit that is 0 or 1, a qubit can be in a superposition of both states.
Watch for: Quantum computers can be offered over the cloud, but the term qubit belongs to quantum computing.
Why the other options are wrong
- A. Wrong because cloud services use ordinary bits.
- C. Wrong because visible light communication (Li-Fi) uses ordinary bits.
- D. Wrong because wireless communication uses ordinary bits.
Source to check: Department of Science and Technology, National Mission on Quantum Technologies and Applications; NCERT Class 12 Physics background on quantum states
Answer from the official UPSC key. Written and fact-checked by AI against the official key. Spotted a mistake? Report it.