IT coding, tools and security: Examples of exam questions

Essential characteristics:

1. On-demand self-service

2. Broad network access

3. Location independent resource pooling

4. Rapid elasticity

5. Measured Service

2. What does PaaS mean? (+critical discussion)

Platform as a Service (PaaS) or Application Platform as a Service (aPaaS) or platform-based service is

a category of cloud computing services that provides a platform allowing customers to develop, run,

and manage applications without the complexity of building and maintaining the infrastructure

typically associated with developing and launching an app.

The Benefits of PaaS

PaaS is faster

There’s less work for developers to do

Reason:

Benefit: Applications can go from idea to availability more quickly

PaaS is cheaper

There’s less admin

Reason: and management work to do

Benefit: Organization spend less supporting applications

PaaS lowers risk

Reason: The platform does more, leaving fewer opportunities for error

Benefit: Creating and running applications gets more reliable

The Drawbacks of PaaS

PaaS is less familiar to developers

It’s harder to adopt because they must learn the PaaS Platform

-

PaaS gives developers less control

- They must work within the constraints of the PaaS Technology

PaaS isn’t identical to existing on-premises environments

- It can raise fears of vendor lock-in

- Moving existing applications to PaaS can be hard

PaaS supports fewer useful scenarios than IaaS

3. Can you name an example of PaaS?

Windows Azure, Force.com.

4. How is traditional virtualization different from private cloud utilization?

Private cloud is a type of cloud computing where the cloud vendor provides a special infrastructure for

—

a single client. With public cloud services, vendors using multitenant strategies the data and

resources of one client are handled the same way, and in the same containers, as the data and resources

of another client. They are put into the same infrastructure, which creates some security questions.

With private cloud, the vendor takes the company data and sends it to a remote vendor location where

it is completely separate from any other client data.