How does cloud computing provides on-demand functionality?

Correct Answer: Cloud computing consists of 3 layers in the hierarchy and these are as follows: 1 Infrastructure as a Service (IaaS) provides cloud infrastructure in terms of hardware like memory, processor speed etc 2 Platform as a Service (PaaS) provides cloud application platform for the developers 3 Software as a Service (SaaS) provides cloud applications which are used by the user directly without installing anything on the system The application remains on the cloud and it can be saved and edited in there only

Correct Answer: The Apple compilers are based on the compilers of the GNU Compiler Collection

Correct Answer: None of the above

Explanation:

A class can have any number of constructors. If a class have more than one constructor, we call it as the constructor is overloaded.

Correct Answer: Function: A Function is a block of statement which perform some operation Declaring the function before using the function in program is known as implicit declaration of the function For Example:: int bar(void); // function (forward) declaration int main(void) { bar(); // bar was declared, the compiler has all the info return foo(123); // foo not yet known; impl decl warning } // not previously declared function definition int foo(int a) { return a; } // previously declared function definition int bar() { return 321; }

Correct Answer: Yes, it is possible to nest functions in javascript

Correct Answer: API stands for Application programming interface is very useful in cloud platforms as it allows easy implementation of it on the system It removes the need to write full fledged programs It provides the instructions to make the communication between one or more applications It also allows easy to create application with ease and link the cloud services with other systems

Correct Answer: Cloud computing is going all together for a different look as it now includes different data types like emails, contracts, images, blogs, etc The amount of data increasing day by day and cloud computing is requiring new and efficient data types to store them For example if you want to save video then you need a data type to save that Latency requirements are increasing as the demand is increasing Companies are going for lower latency for many applications

Correct Answer: Eucalyptus stands for ?Elastic Utility Computing Architecture for Linking Your Programs to Useful Systems? and provides an open source software infrastructure to implement clusters in cloud computing platform It is used to build private, public and hybrid clouds It can also produce your own datacenter into a private cloud and allow you to extend the functionality to many other organizations Eucalyptus provides APIs to be used with the web services to cope up with the demand of resources used in the private clouds

Correct Answer: The hypervisor is a virtual machine monitor (VMM) that manages resources for virtual machines The name hypervisor is suggested as it is a supervisory tool for the virtual machines There are mainly two types of hypervisors : - Type-1: the guest Vm runs directly over the host hardware, eg Xen, Hyper-V, VmWare ESXi - Type-2: the guest Vm runs over hardware through a host OS, eg Kvm, Oracle virtualbox

Correct Answer: It depends on the type of business that demands a cloud setup Suppose if the subscription on a public cloud for an application that is to be deployed on OS images is proving to be more costly then to buy some new datacenters and maintain them Then obviously the a private cloud has to be setup instead of a public cloud This public clouds follow utility billing methodology as electricity bill for example