What are the common use cases of cloud infrastructure in real world applications ?

common uses webhosting, mobile and social application, development and disaster recovery etc

How does cloud computing help in reducing IT maintenance and improving performance ?

it helps to reduce cost and very user friendly we can manage easily all over the world we can improve the performance what we require. we can improve immediately based on the demand .

How does cloud computing help in reducing IT maintenance and improving performance ?

What are the common use cases of cloud infrastructure in real world applications ?

Explain the difference between scalability and elasticity in cloud computing ?