Key (film)

Key is a 2011 Telugu-language psychological thriller produced by Sukumar Reddy for Dream Theater Entertainments and directed by Nagendra Prasad. Jagapati Babu plays the lead role and the music was composed by Vijay Kurakula. The film is a remake of the English film "Exam".
Plot.
A total of nine candidates gather together in a closed room for what seems to be a special kind of a test. The Invigilator (Jagapati Babu) arrives, tells them that his company intends to select only one candidate from them based on their answer to his question. He also lays certain conditions to write the answer, which look quite simple from the outside; anyone failing to meet the conditions will be disqualified. He leaves the people locked in the room, along with a watchman, but leaves out one important thing – he never gives them any question – or so it seems. The nine candidates first have to find the right question in order to give the right answer. Together they team up to find the question, with their analysis and expertise in their subjects. But with the countdown glaring at them and with the conditions seeming too ridiculous, their true characters begin to come out and candidates start getting eliminated. Who wins, and how does the winner find the ‘question’ is the ‘key’ to this story.