Computers & IT (Non-Engg)

A typical entry-level ethical hacker job posting reveals that a Bachelor's degree in computer Science or a related work field is a must. Beyond that, security certifications can be extremely beneficial in proving you have the requisite knowledge for the job. One survey found that 81 percent of security professionals believe getting certified was a key factor in the decision to hire them.
While many IT security certifications exist, the three main ones for ethical hackers are:
- Certified Ethical Hacker (CEH)
- GIAC (Global Information Assurance Certification) Penetration Tester (GPEN)
- Offensive Security Certified Professional (OSCP)
CEH: The Most Basic and Widely Recognized Certification
If you're looking to get started as an ethical hacker, the CEH certification, the broadest of the three, may be right for you. Offered by the EC-Council, the CEH certification is designed to give IT security professionals a baseline knowledge of security threats, risks and countermeasures through lectures and hands-on labs.

Cloud Computing is a internet based computing power that has a centralized based data storage referred as 'Cloud'. Cloud computing is a term coined for anything that involves delivering hosted service over the Internet. User's data, settings etc are stored on server which is referred as 'Cloud'. Today Cloud computing is being used at a fast pace. Now companies are hiring hardware and software as per their need. For example, Suppose someone needs hardware, software and server for his 6 month project. Since purchasing all these things will cost him in lakhs of rupees but with using clouds these can be easily hired at a very low price for some scheduled time period.
Cloud computing in India for freshers is good option because it is a future technology and gives better Quality of Service (QoS). It is an advanced technology that has the potential to transform the way organizations view and deal with IT operations. With the emergence of cloud computing technology, same applications can be accessed through the Internet and enables a business to gain stability and scalability. It a methodology designed to offer IT resources to the businesses on demand.

BCS mostly subject matter is focused on core maths and physics rather computer Science, here is less computer Science material than BCA/BIT/B.Sc(IT).
BCS is basically for those students who want to do further study with combination of Core math and computer OR make career in Applied Mathematics where mathematics can be used with help of computer Science knowledge like computer programming.
Its just like same B.E and B.Tech, B.E degree awarded in old engineering colleges whereas for last 10–15 years B.Tech is rewarding.
there is not a big difference, just B.tech degree gained more practical exposer than theoretical like in B.E.
Conclusion - There are no any big difference BCS and BCA.

Scope of Cloud Computing is a rising up field which will bring up a lot of job opportunities in coming days. Today the way in which IT sectors are adopting cloud computing can bring up a very bright career in this field. Cloud Computing is a popular new trend in technology sector. This technology is opening many career scopes. Besides this, it also helps people in managing internet data. Now the pooling of every service whether it is of computer or internet can be done directly through the servers attached to clouds. The users of Cloud Computing do not need any hardware or software. According to a recent survey, in India there may be more than 1 Lakh jobs available in the field of Cloud Computing by the year 2015.