A Ph.D. with an academic focus is called a Ph.D. Doctoral programs usually last for three years and candidates complete them in five to six years. However, the duration of the course will vary according to the Phd subjects taken. Applicants must have a master’s degree to enroll in Ph.D. programs. In a Ph.D. program, students need to select a topic, study deeply about it, answer questions about the topic and submit the research work. The candidates were able to earn a Ph.D. in distance learning earlier. However, according to the UGC Circular issued in 2017, remotely completed PhDs will not be recognized. So students need to come to the university to complete their Phd courses. Only those who have a master’s degree in a particular field similar to the field in which they wish to obtain a Ph.D. can apply for the Ph.D. program. Some universities require candidates to have an MPhil before enrolling in a Ph.D. Apart from that, many universities state that those who pass UGC NET are eligible for the Ph.D. program they offer. Candidates interested in earning a Ph.D. in Engineering must have a valid GATE score. Candidates accepted for a Ph.D. program at an institution are required to submit research proposals and research topics. Phd subjects are not easy, they require a lot of research. Students should select Phd subjects according to their interest because they have to research them.