Page 212 - DCAP104_EXPOSURE_TO_COMPUTER_DISCPLINES

Unit 10: Programming Language

10.3 Summary Notes

• The programmer prepares the instructions of a computer program and runs those
instructions on the computer tests the program to see if it is working properly and makes
corrections to the program.
• Programming languages are said to be “lower” or “higher”, depending on how close they
are to the language the computer itself uses or the language people use.
• The programmer who uses an assembly languages requires a translator to convert the
assembly language programm into machine language.
• Languages called very high-level languages are often known by their generation number,
that is they are called fourth-generation languages or more simply 4 GLS.

• A standardized query language which can be used with several different commercial data
base programs, is structured query language, popularly known as SQL.

10.4 Keywords

Programming language: A programming language is an artificial language designed to express
computations that can be performed by a machine, particularly a computer.

Self-modifying programs: Self-modifying program is program that alters its own instructions
while it is executing — usually to reduce the instruction path length and improve performance
or simply to reduce otherwise repetitively similar code, thus simplifying maintenance.

Software interfaces: A software interface may refer to a range of different types of interface at
different “levels”: an operating system may interface with pieces of hardware, applications or
programs running on the operating system may need to interact via streams, and in object oriented
programs, objects within an application may need to interact via methods.

Write a function of factorial using C language.

10.5 Self-Assessment Questions

1. A computer programmer
(a) enters data into computer
(b) writes programs

(c) changes flow chart into instructions
(d) provides solutions to complex problems

(e) does total planning and thinking for a computer
2. The most widely used commercial programming computer language is
(a) BASIC (b) COBOL

(c) FORTRAN (d) PASCAL

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