3. PASCAL: named after the famous 17
th
century French mathematician
- It was expressly designed as a language to make programming more systematic
and discriplired and in these respects lends itself to structured programming
- It is however more difficult to learn than are COBOLS BASIC and so is unliked to
be accepted as a language for microcomputers are geared to BASIC only
Question 3. Operating Systeim?
- Concept of OS:
An OS consists of a suite of programs, one of which, the master,
kernel or exeactive program, remains resident in the main store.
This program controls the other OS programs in th suites and
between them they controls the application programs
Often the operating system includes various application packages
among its suit of programs. Ex of such software include: word
processing, electronic mail, networking, speadsheet, graphics and
file handling
- Function of OS
Pricrity assignment:
Jobs waiting execution are scheduled according to either a predetermined or a dynamic
assignments plan
Control of multiprogramming
Control of accomplish multiprogramming an “executive” or “supervisor” program is
employed to control the application programs
Communication
Control of data transmission between terminals and the computer, and computer to
computer
Database
Control of DBMS
Software control
Control of assemblers, compilers, utility software, and subroutines so that these are
imediately available when required
Spooling
The control of input/output peripherals in order to achieve their best utilisation
Dynamic allocation
Of main and backing storage, including virtual storage
Operating allocation
Via the console printer or VDU
Debugging and editing new programs
In confunction with the compiler, and passing error msgs to the user
Operation log
Maintaince of details of all jobs carried out by the computer
Application package control
Especially with microcomputers, as describe above
Chapter 6: TRANSLATORS.
Question 1. Translators?
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