Below is a list of websites that contain the most common computer science/IT questions and answers.
GeekInterview.com is an open database where you can share tech, computer science interview questions, comment and answer any questions.
IT interview questions categorized by different software/IT company.
TechInterviews.com is a collection of thousands of tech interview questions and answers, including questions on different areas of computer science and programming.
Large pool of technical questions with answers, explanations, code and detailed analysis!