How often is the release（）
A. Once a month
B. Twice a year
C. Once a year
D. Every two or three months
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Which systems development life cycle models include two parts of other models（）
A. Rapid application development
B. Joint application development
C. SDLC model
D. The spiral model
Why Linux becomes open source（）
A. It is generous to do that
B. It can help Linux become better through get different people’s ideas and comments
C. It is convenient to do so
D. It is fashionable to do so
What was Windows 3.0 advantage over other systems（）
A. It was more colorful
B. Its advertisement was better than others
C. Users weren’t locked into one vendor’s products
D. It had catchy design
Which of the following statement is not true about Kenneth Thompson（）
A. He also invented the B programming language, the direct predecessor to the C programming language
B. Since 2006, Thompson has worked at Google, where he co-invented the Google programming language
C. He has worked at Bell Labs for most of his career
D. He is an American pioneer of computer science
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