The certificate courses are more specific. Students can choose to study a particular area of computing. It could be learning to develop games or relating mobile software or about networking. All these are part of computer science. The student will be taught the programming and software for that particular application. He may learn to develop websites or to make gaming software.
The job opportunities are many. As the certificate course concentrates more on the practical part of computing, the student is ready for the job as soon as he has passed the course. Many software companies and developers are looking for students with a certificate. Some non-IT companies also appoint such people in their IT department.