1.
.MS DOS was developed in
Correct Answer
B. 1984
Explanation
MS DOS was developed in 1984. This operating system was created by Microsoft and was the first widely used operating system for IBM-compatible personal computers. It provided a command-line interface and allowed users to navigate and manage files and directories on their computer. MS DOS played a significant role in the early development of personal computing and laid the foundation for future operating systems.
2.
Maximum length of DOS command including parameters
Correct Answer
C. 127characters
Explanation
The maximum length of a DOS command, including parameters, is 127 characters. This means that the entire command, including any additional information or arguments, cannot exceed 127 characters in length.
3.
CHKDSK command is used to
Correct Answer
D. All of these
Explanation
The CHKDSK command is used to perform various tasks related to analyzing and diagnosing hard disk errors. It can scan the disk for errors, fix any issues found, and report the status of files on the disk. Therefore, the correct answer is "all of these" as the CHKDSK command encompasses all these functionalities.
4.
Which of the following batch file is run while booting in MS DOS
Correct Answer
A. auto-exec.bat
Explanation
The batch file "auto-exec.bat" is run while booting in MS DOS. This file is automatically executed during the boot process and contains commands that are executed each time the computer starts up. It is commonly used to set up environment variables, load device drivers, and execute other necessary commands to initialize the system.
5.
Copy and xcopy are same in the sense of the following answer:-
Correct Answer
C. Both can be used to copy file or a group of files
Explanation
Both copy and xcopy are commands in DOS that can be used to copy files or a group of files. They both serve the same purpose and provide similar functionality when it comes to file copying.
6.
Which command in DOS is used to clear the screen and display the operating system prompt on the first line of the screen/display?
Correct Answer
D. cls
Explanation
The correct answer is "cls". In DOS, the "cls" command is used to clear the screen and display the operating system prompt on the first line of the screen. This command helps to remove any previous commands or output from the screen, providing a clean and clear interface for the user to work with.
7.
Internal commands in DOS are
Correct Answer
C. time, type, dir
Explanation
The correct answer is time, type, dir. These are internal commands in DOS, which means they are built-in commands that are directly executable by the operating system. The time command is used to display or set the system time, the type command is used to display the contents of a text file, and the dir command is used to display a list of files and directories in a specified location.
8.
.Which of the following command is used to copy files in DOS
Correct Answer
A. copy
Explanation
The correct answer is "copy". The copy command is used in DOS to copy files from one location to another. It allows users to duplicate files, create backups, and transfer files between directories or drives. The "disc copy" command is not a valid command in DOS, and the "type" command is used to display the contents of a text file. Therefore, the correct answer is "copy".
9.
.Copy the hidden system files to a disk the following command is used in DOS
Correct Answer
C. sys
Explanation
The correct answer is "sys" because the "sys" command in DOS is used to copy hidden system files to a disk.
10.
Diskcopy command in DOS is used accomplish the following task
Correct Answer
B. copy contents of one floppy to another
Explanation
The correct answer is "copy contents of one floppy to another." The diskcopy command in DOS is specifically designed to duplicate the contents of one floppy disk onto another. This command allows users to create backup copies of important data or transfer files from one floppy disk to another without manually copying each file individually. It is a convenient and efficient way to replicate the contents of a floppy disk.
11.
DOS command used to copy a file named ldce.doc from drive c: to drive a:
Correct Answer
B. Copy c:\ldce.doc a:
Explanation
The correct answer is "copy c:\ldce.doc a:". This command is used to copy a file named "ldce.doc" from drive C: to drive A:.
12.
Some External DOS commands are
Correct Answer
B. Edit, sys, chkdsk
Explanation
The correct answer is "edit, sys, chkdsk". These three commands are external DOS commands that can be used in the command prompt. The "edit" command is used to create or modify text files, the "sys" command is used to transfer system files to a disk, and the "chkdsk" command is used to check the integrity of a disk and fix any errors. The other options listed do not include all three of these commands.
13.
Which combination of keys is to be pressed to quit a file without saving in DOS
Correct Answer
C. Ctrl+c
Explanation
To quit a file without saving in DOS, the combination of keys to be pressed is ctrl+c. This key combination sends an interrupt signal to the running program, causing it to terminate immediately.
14.
Del command in DOS is used to
Correct Answer
A. delete files
Explanation
The del command in DOS is used to delete files. It allows users to remove specific files from a directory or disk. This command is commonly used to free up storage space or remove unwanted files.
15.
Chkdsk can be used to find ou
Correct Answer
D. All of these
Explanation
The correct answer is "all of these" because chkdsk is a command in Windows that can be used to check and repair the file system on a disk. It can identify and fix bad sectors on the disk, as well as provide information about the occupied space and free space on the disk. Therefore, chkdsk can be used to find out about the disk's bad portion, occupied space, and free space.
16.
Dir command is used to
Correct Answer
A. display the list of files in a directory
Explanation
The dir command is used to display the list of files in a directory. It provides a way to view all the files present in a specific directory.
17.
While working with DOS, which key can be used to repeat the previous command?
Correct Answer
A. F3
Explanation
In DOS, the F3 key can be used to repeat the previous command. This key is commonly used to save time and avoid retyping long or complex commands. By pressing F3, the user can quickly recall and execute the last command entered, making it a convenient shortcut in the DOS environment.
18.
The deleted file in DOS can be recovered if you use the following command
Correct Answer
C. Undelete
Explanation
The correct answer is "undelete". This command is used in DOS to recover a deleted file. When a file is deleted in DOS, it is not immediately removed from the disk, but rather marked as deleted and its space is available for reuse. The "undelete" command allows the user to restore the file by removing the deleted flag and making it accessible again.
19.
FAT stands for
Correct Answer
B. File Allocation Table
Explanation
FAT stands for File Allocation Table. This is a file system structure used by operating systems to keep track of the location of files on a storage device. The FAT contains entries that specify the location of each file on the storage device, allowing the operating system to access and retrieve the files efficiently. The other options, File Accommodation Table, File Activity Table, and File Advantage Table, are not correct definitions for FAT.
20.
Xcopy command in DOS can copy
Correct Answer
D. All of these
Explanation
The xcopy command in DOS is a versatile tool that can be used to copy individual files or a group of files, as well as directories and their subdirectories. Additionally, it can copy files to a different destination, such as a different directory or even a different disk with a different capacity. Therefore, the correct answer is "all of these" as the xcopy command can perform all of these tasks.
21.
.format command in DOS is used to
Correct Answer
C. Both of these
Explanation
The format command in DOS is used to perform two tasks: preparing a blank disk and creating a new blank disk from a used one. This means that the command can be used to erase all data on a disk and prepare it for use, as well as to create a new blank disk by formatting a used one. Therefore, the correct answer is "both of these".
22.
Which command in DOS is used to change the name of the file
Correct Answer
C. both of the above
Explanation
The correct answer is "both of the above" because both the "ren" and "rename" commands in DOS can be used to change the name of a file. These commands allow the user to specify the current name of the file and the desired new name, and the file will be renamed accordingly.
23.
Restore command in DOS is used to
Correct Answer
A. Restore files from disks made using backup command of DOS
Explanation
The restore command in DOS is used to retrieve or recover files from disks that were previously backed up using the backup command of DOS. This means that if you have created a backup of your files using the backup command, you can use the restore command to restore those files back to their original location on your disk.
24.
The vol command in DOS is used to
Correct Answer
C. see the disk volume label
Explanation
The vol command in DOS is used to see the disk volume label. This means that when the vol command is executed, it displays the name or label assigned to a particular disk volume. This can be helpful in identifying and managing different disk volumes within a DOS system.
25.
Which command in DOS is used to look at the sub directory structure
Correct Answer
A. tree
Explanation
The correct answer is "tree". The "tree" command in DOS is used to display the directory structure in a tree-like format. It shows all the subdirectories and files within each directory, making it easier to understand the hierarchy of the file system. This command is helpful for navigating and organizing files and directories in a DOS environment.