1. It is necessary because a person of poor health cannot work competently and any investment on him may go waste.
2. lt determines an applicant's physical ability to perform a specitic job.
3. Physical fitness of the candidate under selection to the job concerned.
 

(i) Aptitude test is a test to measure suitability of the candidates for the post/role.
(ii) It actually measures skill sets of the candidate.
(iii) It helps in predicting the ability and future performance of the candidate.

(i) Where a group of people interview the candidate, it is called panel interview.
(ii) Usually panel comprises chairperson, subject expert, psychological experts, representatives of minorities / under privileged groups, nominees of higher bodies and so on.
(iii) All panel members ask different types of questions on general areas of specialisation of the candidates.
(iv) Each member awards marks of the candidate. At the end, the marks awarded by all the members are aggregated and the candidates are ranked accordingly.

(i) Preliminary Interview
(ii) Structure/ Guided / Planned Interview
(ii) Unstructured Interview
(iv) In depth Interview
(v) Panel Interview
(vi) Stress Interview
(vii) Telephone Interview
(viii) Online Interview
(ix) Group Interview
(x) Video conferencing Interview

The Significance of the placement is given below:
(i) It improves employee morale
(ii) It helps in reducing employee turnover
(iii) It helps in reducing conflict rates or accidents.
(iv) It avoids misfit between the candidates and the job
(v) It helps the candidate to work as per the predetermined objectives of the organization.