1> DOS --->Disk operating system.
2> It is the mechanism inside the PC that supports the process to run the program and access the files.DOS finds the program and run them.
3> Since DOS is an operating system it work on the instruction by the users in the form of command. So, when we write any command on the MS-DOS then it search for the program and run them. Dos finds the data files for the programs and it from and also write to them.
4> DOS is another computer program.
5> First the program is stored in the hard disk and is waiting to run then it is loaded to RAM(Main memory) for execution.
6> When we start up the computer .BIOS locate the DOS to the primary memory(HDD) if HDD is not present then search for the floppy Drive. If both were not present then it will search for the resister to execute the DOS programme.After that DOS takes care of executing all the files.
7> Whatever is the extension of file(file format) the work of DOS is to give meaning to them. No matter what the file type it may be, .EXE, .TXT,etc it treat them as same.
8> FILE ---> The program that comprise the word processing, spreadsheet,and data base software system are files. For DOS itself stored on the disk in the files.
9> a).EXE --> An executable file.
b).COM --> An executable file.
c).BAT ---> An batch command file.
d) .SYS ---> A DOS device driver program.
10> There are three basic kinds of disk files;
a)Data files.
b)Program files.
c)Sub directory files.
11> .SYS is a DOS device driver program.This type of files are run by the DOS not by the users. When we install some application software and any hardware device to the system, we must need to install .SYS file into DOS.
12> COMMANDS --->It is of three types:-
a)Internal DOS command
b)program file command
c)Batch file command.
13> a) CLS ---> To clear the screen in the comd prompt.
b)BACKSPACE ---> To clear one character from the right.
c) ESc ---> To clear the whole command written.
d) F3 --->To repeat the previous command.
e) F1 ---> To repeat one character at a time.
f) VER ---> To know the version of the DOS.
c> dir.t*.* --->The command that will display a directory of all files that start with the letter 'T'
2> It is the mechanism inside the PC that supports the process to run the program and access the files.DOS finds the program and run them.
3> Since DOS is an operating system it work on the instruction by the users in the form of command. So, when we write any command on the MS-DOS then it search for the program and run them. Dos finds the data files for the programs and it from and also write to them.
4> DOS is another computer program.
5> First the program is stored in the hard disk and is waiting to run then it is loaded to RAM(Main memory) for execution.
6> When we start up the computer .BIOS locate the DOS to the primary memory(HDD) if HDD is not present then search for the floppy Drive. If both were not present then it will search for the resister to execute the DOS programme.After that DOS takes care of executing all the files.
7> Whatever is the extension of file(file format) the work of DOS is to give meaning to them. No matter what the file type it may be, .EXE, .TXT,etc it treat them as same.
8> FILE ---> The program that comprise the word processing, spreadsheet,and data base software system are files. For DOS itself stored on the disk in the files.
9> a).EXE --> An executable file.
b).COM --> An executable file.
c).BAT ---> An batch command file.
d) .SYS ---> A DOS device driver program.
10> There are three basic kinds of disk files;
a)Data files.
b)Program files.
c)Sub directory files.
11> .SYS is a DOS device driver program.This type of files are run by the DOS not by the users. When we install some application software and any hardware device to the system, we must need to install .SYS file into DOS.
12> COMMANDS --->It is of three types:-
a)Internal DOS command
b)program file command
c)Batch file command.
13> a) CLS ---> To clear the screen in the comd prompt.
b)BACKSPACE ---> To clear one character from the right.
c) ESc ---> To clear the whole command written.
d) F3 --->To repeat the previous command.
e) F1 ---> To repeat one character at a time.
f) VER ---> To know the version of the DOS.
c> dir.t*.* --->The command that will display a directory of all files that start with the letter 'T'
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