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

In Disk Operating System (DOS), the command used to make a new directory (folder) is Option A: Md. When you type "md dirname" at the command prompt in DOS, it creates a new directory with the name "dirname" in the current location.

Option B, "Cd," is used to change the current directory, not to create a new one.
Option C, "Rd," is used to remove (delete) a directory, not to create one.

Therefore, the correct answer is Option A: Md.

In Disk Operating System (DOS), the full form of MS-DOS is Option C: Micro Soft Disk Operating System. MS-DOS was developed by Microsoft Corporation as a command-line operating system for IBM-compatible personal computers.

Option A, "Micro System Disk Operating System," and Option B, "Micro Simple Disk Operating System," are incorrect and not the correct full forms of MS-DOS.
Option D, "Micro Sort Disk Operating System," is also incorrect.

Therefore, the correct answer is Option C: Micro Soft Disk Operating System.

In the context of Computer Science and Disk Operating System (DOS), an Operating System (OS) can be compared to Option C: Government. This comparison reflects the role of an OS in managing and governing the computer's hardware and software resources, much like a government oversees and manages a country's resources and operations.

Option A, "Parliament," and Option B, "Secretary," are not accurate comparisons for an Operating System.
Option D, "None of the above," is not applicable as Option C is the correct comparison.

Therefore, the correct answer is Option C: Government.

In Disk Operating System (DOS), the Format command is used to Option A: Prepare a blank disk. When you format a disk, it prepares the disk to store data by creating a file system and directory structure on it, effectively erasing any existing data.

Option B, "Create a new blank disk from a used one," is not accurate. Formatting a disk does not create a new physical disk; it prepares the existing disk for data storage.
Option C, "Both of above," is incorrect because formatting prepares a blank disk; it does not create a new disk from a used one.

Therefore, the correct answer is Option A: Prepare a blank disk.

In Disk Operating System (DOS), the command set that is correct according to their function is Option C: CD and RD.

CD (Change Directory) is used to change the current directory in DOS.
RD (Remove Directory) is used to delete or remove a directory in DOS.

Option A, "RD can MD," is not a correct command set. MD (Make Directory) and RD (Remove Directory) are commands for creating and deleting directories respectively, but "RD can MD" is not a valid syntax.
Option B, "DEL and ERASE," are commands used for deleting files, not for creating or managing directories.
Option D, "COPY and RENAME," are commands used for copying files and renaming files, not for managing directories.

Therefore, the correct answer is Option C: CD and RD.

In Disk Operating System (DOS), the command used to change the file name is Option A: Ren. The Ren command is short for Rename, and it allows you to rename a file or set of files in DOS.

Option B, "Rename," is essentially the same as Ren in DOS, so Option C, "Both of above," is correct as well.

In Disk Operating System (DOS), the command used to copy files to transfer them from one PC to another is Option D: Copy. The Copy command allows you to copy files from one location to another, whether within the same system or to another system.

Option A, "Rename," is used for renaming files and is not relevant to copying files.
Option B, "Path," is used to set or display the search path for executable files and is not used for copying files.
Option C, "Dir," is used to display a list of files and directories but does not copy files.

Therefore, the correct answer is Option D: Copy.

The RESTORE command in DOS is used to restore files from disks that were backed up using the BACKUP command.
Option A: Restore files from disks made using the BACKUP command - This is the correct answer as the RESTORE command complements the BACKUP command by allowing the user to recover files from backup disks.
Option B: Restore files which are deleted - Incorrect. RESTORE does not recover deleted files directly.
Option C: Restore files from recycle bin - Incorrect. DOS does not have a recycle bin like modern operating systems.
Option D: Restore files which are deleted recently - Incorrect. RESTORE is specifically for recovering files from backup disks, not for recently deleted files.

The VOL command in DOS is used to display the disk volume label and serial number, if they exist.
Option A: See the value of list - Incorrect. VOL does not display a list of values.
Option B: See the variety of language - Incorrect. VOL does not show language information.
Option C: See the disk volume label - This is the correct answer as the VOL command is specifically used to show the disk volume label and serial number.
Option D: See the volume of largest - Incorrect. VOL does not display the volume of the largest item.

In MS-DOS, commands can be entered using either small or capital letters, or a combination of both. However, internally, MS-DOS processes commands in capital letters.
Option A: Small letter - Incorrect. MS-DOS does not process commands in small letters internally.
Option B: Capital letter - This is the correct answer as MS-DOS converts all commands to capital letters for internal processing.
Option C: Both a and b - Incorrect. MS-DOS does not use both small and capital letters internally; it uses only capital letters.
Option D: None of above - Incorrect. The correct option is B, as MS-DOS uses capital letters internally.