| 1.A （ ） is a functional unit that interprets and carries out instructions. |
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| 2.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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| 3.( ) drives can erase and store data. |
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| 4.( ) is not the basic hardware component of computers. |
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| 5.Programs written in all other kinds of languages are translated into ( ) before they are performed. |
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| 6.The（ ）is a collection of modules serving as interface between hardware and software to provide a software platform. |
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| 7.The user must interact with the （ ） in order to accomplish task. |
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| 8.（ ）：An error can be caused by attempting to divide by 0. |
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| 9.( ) is an operating system that was initially created as a hobby by a young student. |
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| 10.（ ） is the foundation on which applications are built. |
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| 11.( ) is a fast and powerful operating system, based on the UNIX O.S. |
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| 12.( ) refers to the parts of the computer that you can see and touch. |
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| 13.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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| 14.Very long, complex expressions in program are difficult to write correctly and difficult to （ ） . |
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| 15.The two goals of an operation system are （ ） and efficiency. |
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| 16.Single program operating systems allow ( ) user(s) to run ( ) program(s) at one time. |
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| 17.（ ）：A series of instructions(commands) performed in a sequence specifying actions to accomplish a task. |
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| 18.A （ ） consists of the symbols,characters, and usage rules that permit people to communicate with computer. |
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| 19.（ ） 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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| 20.Insufficient （ ） can cause a processor to work at 50% or even more below its performance potential. |
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