solution

Platform as a Service (PaaS):

Question 20 options:

	Where cloud providers offer services that include the hardware, operating system, development tools, testing, and hosting, that its customers use to build their own applications on the provider’s infrastructure.
	Where cloud providers offer services that include running the remote hardware, storage, and network, but the client firms can choose the software used.
	Typically requires the most amount of support and maintenance for those using it in their business.
	Refers to a third-party software-replacing service that is delivered on-line.

Question 21

Total Cost of Ownership (TCO):

Question 21 options:

	Does not include providing regular backup of critical data, and it does not include providing training and end user support.
	Typically includes both direct and indirect costs.
	When confronted with the real complexities and costs entailed with technology, many managers begin to think of IT as a cost sink rather than a strategic resource.
	An economic measure of the full cost of owning a product.

Question 22

Blockchain:

Question 22 options:

	A distributed and decentralized ledger that records and verifies transactions and ownership, making it difficult to tamper with, or shut down.
	A digital asset where a secure form of mathematics is used to handle transactions, control the creation of additional units, and verify the transfer of assets.
	An open source, decentralized payment system, that operates in a peer-to-peer environment, without a bank or central authority’s involvement.
	An asset that can be easily turned into cash.

Question 23 Which of the following is true?

Question 23 options:

	The centralized nature of the blockchain system makes it extremely unlikely that it can be directly tampered with, or altered, by hackers.
	The technology behind most crypto and blockchain technologies is available solely through proprietary firms.
	There is a single blockchain software that is used by all cryptocurrencies.
	Blockchain does not rely on intermediaries like banks and credit card companies.

Question 24

Which of the following is true?

Question 24 options:

	Web services and application programming interfaces (API) enable different applications to communicate with one another.
	Web servers serve up websites, but they can’t perform any scripting.
	Most firms serve complex business logic from web servers.
	Only “server class hardware” can be configured to run server software.

Question 25

Which of the following is true?

Question 25 options:

	Infrastructure as a Service (IaaS) typically requires the least amount of support and maintenance.
	Software as a Service (Saas) requires that organizations buy their own physical hardware.
	Software as a Service (SaaS) typically requires the highest amount of support and maintenance.
	Cloud computing refers to replacing computing resources with services provided over the Internet.