There is various types of courses in academies. For example in one type, of course, you will learn about theories and in order to bring them into reality, you will have to take another subject along with it. Thus in many other qualification courses, the theory courses are more prevalent than the practical courses. In order to gather experience with the practical aspect, you will either need to take the second course or you will have to face it in reality when the job starts and start everything from the ground.
In the case of higher national certificate and higher national diploma, the practical aspect of a subject gets more important. It is a course where the students are given practical knowledge along with the theories and which is why HNC or HND makes the student ready for a job by the end of the course.
In most cases, after passing out from the course, one has to face the practical aspect of a subject, for example, let us say in computers, one student got a degree. Now, in order to garner furthermore practical knowledge, one has to gather in the job sector. And it is at times, unfavorable as most companies will prefer having a prior practical knowledge before accepting a job application.
That's where these courses come in. In the above case, HNC and HND in computing will have more chance of coming out with good marks in the interviews than other courses as these courses are designed such a way that, they will have the practical aspect of the subject along with it. Since they have more experience, these degree holders are more equipped with professional demands of a job.
And it is as such because these courses are made such a way that, the practical aspect of a subject goes hand in hand with the theories and in some cases, practical aspect get more focus than even the theory section. These courses are offered in various subjects, for example, HNC and HND in computing, engineering, agriculture etc and in every subject, the practical aspect takes utmost importance. Each one of these subjects needs different levels of practical knowledge and all the higher academies provide the courses based upon that.