|Classical Computers are used for classical computing.
|Quantum Computers make use of the quantum computing approach.
|Data is stored in bits.
|Data is stored in Qubits.
|It performs calculations in the form of binary digits.
|It performs calculations on the basis of the object's probability.
|It can only process a limited amount of data.
|It can process exponentially more data.
|Logical operations are carried out using the physical state, i.e., usually binary.
|Logical operations are performed using the quantum state, i.e., qubits.
|Fails to solve too complex and massive problems.
|Quantum Computers deals with complex and massive problems.
|It has standardized programming languages such as Java, C, C++.
|It does not rely on any specific programming language.
|Classical systems are used for daily purposes.
|These systems cannot be used for daily purposes as it is complex in nature, and scientists or engineers can use it.
|It is built with CPU and other processors.
|It has a simple architecture and runs on the set of qubits.
|It provides security to data but limited.
|It provides highly secured data and data encryption.
|Low speed and more time taking systems.
|Improved speed and saves much time.