Programming and Databases

A computer is a machine which works from a set of pre-written instruction (Program). A computer will (under the control of its program) perform different things depending on the values of the data provided with from moment to moment. A computer program which is not built-in, but is brought into action as and when it is required.

Application Generator - It is a program, which writes program such as Pascal, Oracle, VB and so on.

Source program – It is human written program that is easy for a human being to read, write and understand. Example: writeln (Number), cin>Name. Object program (Binary) - It is machine understandable program, which is easy for a computer to read and act upon. Example: (Binary) 0111 0011 1001 0110

High Level Language – It is English like Statement Language, which is relatively easy for humans to follow. Example :- COBOL, FORTRAN, SQL, PASCAL. Low Level Language - It is Machine like Statement Language, Which is relatively easy for computers to translate and execute. But it is not natural for human beings. Example:- Machine code (binary), Mnemonic, Assembler

Serial Processing - One Process after another until all of the processes were completed. (Example: Program Instruction Processing). Parallel Processing - Processing where some operations run concurrently with others (Two Processes taking place in the computer at the same time. Example:-The peripheral controllers in the computer). Parallelism may exist between phases of an instruction’s execution between data transfer and processing, or between the operations of multiple independent processors.