| 1.The program and the data are kept inside the computer in a place called （ ）. |
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| 2.( ) is an operating system that was initially created as a hobby by a young student. |
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| 3.( ) drives can erase and store data. |
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| 4.（ ） is permanently stored in the computer and provides a link between the hardware and other programs that run on the PC. |
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| 5.（ ）：An error can be caused by attempting to divide by 0. |
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| 6.As an operating system repeatedly allocates and frees storage space , many physically separated unused areas appear. This phenomenon is called （ ） . |
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| 7.When a program has no syntax errors, the compiler finishes ( ) the program, the source code, and generates an object code file. |
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| 8.The term " （ ） program" means a program written in high-level language. |
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| 9.( ) allow more than one program to be run at the same time on the computer. |
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| 10.The two goals of an operation system are （ ） and efficiency. |
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| 11.The user must interact with the （ ） in order to accomplish task. |
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| 12.Programs written in all other kinds of languages are translated into ( ) before they are performed. |
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| 13.Every valid character in a computer that uses even （ ） must always have an even number or 1 bits. |
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| 14.( ) is not the basic hardware component of computers. |
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| 15.To document your code can increse program （ ） and make program easier to maintain . |
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| 16.All modern （ ） are multitasking and can support running several processes simultaneously. |
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| 17.The ( ) turns the object file into an executable program. |
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| 18.The（ ）is a collection of modules serving as interface between hardware and software to provide a software platform. |
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| 19.（ ） is the foundation on which applications are built. |
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| 20.The （ ） has several major components, including the system kernel, a memory management system, the file system manager, device drivers, and the system libraries. |
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