Direct examination (also called examination in chief) is the questioning of a witness by the party who called him or her, in a trial in a court of law. Direct examination is usually performed to elicit evidence in support of facts which will satisfy a required element of a party's claim or defense.
In direct examination, one is generally prohibited from asking leading questions. This prevents a lawyer from feeding answers to a favorable witness. An exception to this rule occurs if one side has called a witness, but it is either understood, or soon becomes plain, that the witness is hostile to the questioner's side of the controversy. The lawyer may then ask the court to declare the person he or she has called to the stand a hostile witness. If the court does so, the lawyer may thereafter ply the witness with leading questions during direct examination.
In an academic or professional context, examinations (or exams for short) are tests which aim to determine the ability of a student or a prospective practitioner.
A competitive examination is an examination where applicants compete for a limited numbers of positions, as opposed to merely having to reach a certain level to pass.
A comprehensive examination is a specific type of exam taken by graduate students, which may determine their eligibility to continue their studies.