"48. In the case of Zahoor Ahmad (supra), the required essential qualification was ITI certificate, as a prime qualification, and the appellants therein were possessing Diploma in Electrical Engineering/Electronics and Communication. The Hon'ble Supreme Court held that in the absence of a specific statutory rule under which holding of higher qualification could presuppose the acquisition of lower qualification, the higher qualification of Diploma in Electrical Engineering/Electronics and Communication cannot be said to presuppose the required qualification of ITI certificate. However, in the case in hand, there are multiple essential qualifications required for the advertised posts. The petitioners' case is not that they are possessing higher degree, instead the only case is that syllabus of 'O' level computer course - which is one of the educational qualifications in the advertisement - is included in their basic education i.e. B.Tech (C.S.), B.Sc (C.S.), B.C.A. etc., being a 3 or 4 year degree/diploma courses, therefore, they are entitled to participate in the vacancy and need not to be in possession of 'O' level course from DOEACC/NIELIT, which is only a one year foundational course. If the same is not done, it would be highly undesirable to ask or require any person who has already completed a 3 or 4 year degree/diploma course in the domain of computer science to pursue and produce a certificate of one year ''O' Level Course which is a foundation course in the same domain. However, the requirement of ''O' Level Course is proper for candidates whose bachelor degrees like B.A., B.Com etc., are not in domain of computer science or those who are not entirely covered under the syllabus of 'O' level. In such circumstances, it is clearly evident that the ratio of Zahoor Ahmad case (supra) is not applicable in the instant case.