The main tasks of a computer programmer are first, to write programs to solve problems; second, to write them on time as they are needed; and third, to write them clearly by fully documenting them so that other programmers can understand them. The kinds of problems that are tackled(解决)depend on whether the programmer is working for a computer manufacturer or user. The former needs such programs as compilers, assemblers, executives, operating systems, and utility routines. These programs are intermediaries(中间者) between the machine and the commercial programs which are written in one of the high-level languages. They are about the system, and therefore programmers who write them are called system programmers. If the programmer is working for computer users, however, his or her programs may deal with either scientific or commercial problems.
Choose the best answer according to the passage
1) A computer programmer should undertake main tasks.
A. 1 B.
2) The word they' in Line 2 of this paragraph refers to
A. programs B. programmers C. tasks D. problems
3) kinds of system programs are mentioned in the paragraph.
A. 5 B.
4) is written in one of the high-level languages.
A. Machine B. System program
C. Intermediary D. Commercial program
5) Scientific or commercial programs are useful for
A. programmers B. computer users
C. manufacturers D. computers
The movement of electronic signals between main memory and the ALU as well as the control signal between the CPU and input /output devices are controlled by the control unit of the CPU. ( )
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( 选词填空）A database is a of information that is organized so that it can easily be , managed, and . In one view, databases can be classified according to of content: bibliographic, full-text, numeric, and images.
In computing, databases are sometimes classified according to their approach. The most prevalent approach is the database, a tabular database in which data is defined so that it can be and accessed in a number of different ways. A database is one that can be dispersed or replicated among different points in a. An object-oriented programming database is one that is congruent with the data defined in object and subclasses.
