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Disk Operating System (DOS) MCQ Questions & Answers | Computer Science

Learn Disk Operating System (DOS) MCQ questions & answers are available for a Computer Science students to clear GATE exams, various technical interview, competitive examination, and another entrance exam. Disk Operating System (DOS) MCQ question is the important chapter for a computer science and technical students.

Each section contains 100 MCQs on Disk Operating System (DOS) .
1
In MS-Dos 6.22, which part identifies the product uniquely
Discuss
Answer & Solution
Answer: Option D
Solution:
MS stands for Microsoft, DOS is the name of operating system Disk Operating System, 6.22 is the version number that identifies the product.
2
In MS-Dos what command you will use to display system date?
Discuss
Answer & Solution
Answer: Option A
Solution:
Ver command displays the version number of Dos. There is no command as Disk. Format command prepares a disk to be used with DOS. Thus Date is the command that lets you to display and/or change the system date.
3
While working with Ms-Dos which command transfers a specific file from one disk to another?
Discuss
Answer & Solution
Answer: Option A
Solution:
For a specific file to copy from one disk to another disk, Copy command should be used. Diskcopy copies whole disk into new disk. Time command is to display system time and Rename command just changes the name of a file.
4
If you don't know the current time, which command will you use to display
Discuss
Answer & Solution
Answer: Option C
Solution:
Time command displays and allows you to change system time. TIME only displays the system time and TIME
5
Which command divides the surface of the blank disk into sectors and assign a unique address to each one
Discuss
Answer & Solution
Answer: Option B
Solution:
Ver is used to display the version number of DOS in use. Fat command does not exist and Chkdsk is to check disk errors and fix it. Thus dividing surface into sectors is done by Format command.
6
Each time you turn on your computer, it will check on the control file
Discuss
Answer & Solution
Answer: Option C
Solution:
command.com, io.sys and msdos.sys are the essential system files of MS-Dos. Loading these files from disk into memory is known as booting. Booting is the process of preparing your computer to work.
7
If you need to duplicate the entire disk, which command will you use?
Discuss
Answer & Solution
Answer: Option B
Solution:
Diskcopy is used to perform track-by-track copy of a disk into another. Copy command copies selected files; chkdsk and format commands are not for copying purpose.
8
Which of the following extensions suggest that the file is a backup copy.
Discuss
Answer & Solution
Answer: Option A
Solution:
Bak extension is commonly used to store backup copies of files so that it can be restored later when original file is corrupted or deleted. Bas extension indicates the file is a BASIC program source file, com is command file and txt is plain text file.
9
Which command lists the contents of current directory of a disk
Discuss
Answer & Solution
Answer: Option D
Solution:
Dir command lists the directory of current location. It includes the files, subdirectories and some other system information. Tree command is used to list the directory structure in tree diagram; CD command to change directory and Copy command to copy a file into another.
10
Only filenames and extensions are to be displayed in wide format, which command you'll use?
Discuss
Answer & Solution
Answer: Option A
Solution:
Dir/w only displays the file names and extensions excluding file created date/time, file size. Second option dir a: will list the contents of A drive (floppy drive), third dir/s lists current directory and its sub-directories too, dir/b displays bare format, that means, it just makes a list of files, no more information.