Discuss the three main service models of cloud computing.
What will be an ideal response?
? Software as a Service (SaaS): software and associated data are centrally hosted on the
cloud.
? Platform as a Service (PaaS): a computing platform that allows the creation of web
applications quickly and easily and without the complexity of buying and maintaining the software and infrastructure underneath it. Sometimes, PaaS is used to extend the
capabilities of applications developed as SaaS. While earlier application development
required hardware, an operating system, a database, middleware, Web servers, and other
software, with the PaaS model only the knowledge to integrate them is required. The rest
is taken care of by the PaaS provider.
? Infrastructure as a Service (IaaS): delivers servers, storage, network and operating
systems – typically a platform virtualization environment – to consumers as an on-
demand service, in a single bundle and billed according to usage. A popular use of IaaS is
in hosting websites, where the in-house infrastructure is not burdened with this task but
left free to manage the business.
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The correct function name for overloading the addition (+) operator is:
a. operator+ b. operator(+) c. operator:+ d. operator_+
The function that accepts pointers to two C-strings and an integer argument that indicates how many characters to copy from the second string to the first is
a. strcpy b. strncpy c. copystring d. strintcpy e. None of these
Which of the following is not an advantage of AES over 3DES?
A. AES can be used with small mobile devices B. AES can be used in Asymmetric Encryption C. AES is efficient enough in terms of processing power and RAM requirements to be used on a wide variety of devices. D. AES offers three alternative key lengths instead of two.
Identify the letter of the choice that best matches the phrase or definition.
A. Fills a destination area using the format of the source area; no content is copied. B. Pastes the contents and format of the source area. C. Copies the format and contents. D. Returns a number that corresponds to the system date and time beginning with December 31, 1899. E. Keeps a cell reference constant when copying a formula or function. F. Assigns a value to a cell based on a logical test. G. Indicates a cell is using a name Excel does not recognize. H. Shows the relationship or proportion of parts to a whole. I. Scrutinizes the impact of changing values in cells that are referenced by a formula in another cell. J. Determines the value of a cell on which the formula depends.