Please keep at least one language enabled. || కనీసం ఒక భాషను ఎంచుకోండి.
Question 1
ప్రశ్న 1
Which statement most accurately distinguishes an internal DOS command from an external DOS command?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• Internal DOS commands are provided by the command interpreter and are available without loading a separate command program file from disk.
• External commands exist as separate executable utility files that must be available on an accessible drive or path.
• Commands such as COPY, DEL, REN and TYPE are traditional internal commands, while FORMAT and CHKDSK are examples of external utilities.
• External commands exist as separate executable utility files that must be available on an accessible drive or path.
• Commands such as COPY, DEL, REN and TYPE are traditional internal commands, while FORMAT and CHKDSK are examples of external utilities.
వివరణ:
Question 2
ప్రశ్న 2
Which DOS command is used to copy one or more files from one location to another?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• COPY creates a copy of a file at another specified location or under another specified filename.
• The source file normally remains unchanged after the copy operation.
• TYPE displays file contents, REN changes filenames and DEL removes files.
• The source file normally remains unchanged after the copy operation.
• TYPE displays file contents, REN changes filenames and DEL removes files.
వివరణ:
Question 3
ప్రశ్న 3
Which of the following is traditionally classified as an external DOS command?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• FORMAT is traditionally supplied as a separate DOS utility and is therefore an external command.
• COPY, DEL and TYPE are internal commands provided through the DOS command interpreter.
• External commands require their corresponding program files to be available when executed.
• COPY, DEL and TYPE are internal commands provided through the DOS command interpreter.
• External commands require their corresponding program files to be available when executed.
వివరణ:
Question 4
ప్రశ్న 4
A user wants to display the contents of the text file NOTES.TXT directly on the DOS screen without opening a text editor. Which command should be used?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• TYPE displays the contents of a specified file on the standard output, normally the screen.
• It is particularly useful for viewing ordinary text files from the command prompt.
• COPY, REN and DEL perform copying, renaming and deletion respectively.
• It is particularly useful for viewing ordinary text files from the command prompt.
• COPY, REN and DEL perform copying, renaming and deletion respectively.
వివరణ:
Question 5
ప్రశ్న 5
Which DOS command changes the name of a file without intentionally creating a second copy of that file?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• REN, also written as RENAME in DOS, changes the name of an existing file or directory where supported.
• Renaming does not normally create a second copy of the file.
• COPY duplicates data, while TYPE and DIR display information.
• Renaming does not normally create a second copy of the file.
• COPY duplicates data, while TYPE and DIR display information.
వివరణ:
Question 6
ప్రశ్న 6
What is the result of the DOS command `DEL OLD.TXT` when OLD.TXT exists in the current directory and deletion succeeds?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• DEL is used to delete one or more files.
• `DEL OLD.TXT` targets the file named OLD.TXT in the current directory when no other path is specified.
• ERASE is another DOS command name that performs the same basic file-deletion function.
• `DEL OLD.TXT` targets the file named OLD.TXT in the current directory when no other path is specified.
• ERASE is another DOS command name that performs the same basic file-deletion function.
వివరణ:
Question 7
ప్రశ్న 7
Which DOS command displays the files and subdirectories contained in a directory?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• DIR displays a directory listing containing files and subdirectories.
• Depending on options used, it can also show information such as file size, date and available disk space.
• CLS clears the screen, TYPE displays file contents and REN changes names.
• Depending on options used, it can also show information such as file size, date and available disk space.
• CLS clears the screen, TYPE displays file contents and REN changes names.
వివరణ:
Question 8
ప్రశ్న 8
Assume REPORT.TXT exists in the current directory. Which command correctly makes a copy named BACKUP.TXT in the same directory?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• `COPY REPORT.TXT BACKUP.TXT` reads the source REPORT.TXT and creates a destination copy named BACKUP.TXT.
• REPORT.TXT remains as the original source file after a normal successful copy.
• REN would change the original filename rather than preserve both names.
• REPORT.TXT remains as the original source file after a normal successful copy.
• REN would change the original filename rather than preserve both names.
వివరణ:
Question 9
ప్రశ్న 9
Which DOS command removes all files having the .TXT extension from the current directory, assuming the command is allowed to complete?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• The asterisk wildcard can represent any sequence of filename characters.
• `*.TXT` therefore matches files whose extension is TXT in the selected directory.
• `DEL *.TXT` requests deletion of all matching files, so wildcard deletion must be used carefully.
• `*.TXT` therefore matches files whose extension is TXT in the selected directory.
• `DEL *.TXT` requests deletion of all matching files, so wildcard deletion must be used carefully.
వివరణ:
Question 10
ప్రశ్న 10
In DOS filename matching, what does the `?` wildcard normally represent?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• The question-mark wildcard normally matches one character position in a filename pattern.
• The asterisk wildcard is used for a variable sequence of characters.
• Wildcards are useful with commands such as DIR, COPY and DEL when selecting groups of files.
• The asterisk wildcard is used for a variable sequence of characters.
• Wildcards are useful with commands such as DIR, COPY and DEL when selecting groups of files.
వివరణ:
Question 11
ప్రశ్న 11
Which of the following sets contains only traditional internal DOS commands?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• COPY, DEL and TYPE are traditional internal DOS commands.
• FORMAT, CHKDSK, DISKCOPY and XCOPY are supplied as separate external utilities in classic DOS environments.
• Classification depends on whether the command is built into the command interpreter or stored as a separate command program.
• FORMAT, CHKDSK, DISKCOPY and XCOPY are supplied as separate external utilities in classic DOS environments.
• Classification depends on whether the command is built into the command interpreter or stored as a separate command program.
వివరణ:
Question 12
ప్రశ్న 12
What does the DOS command `REN OLD.TXT NEW.TXT` do when OLD.TXT exists and the operation is valid?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• REN changes the name of an existing file or directory.
• The command changes OLD.TXT to NEW.TXT rather than creating another copy.
• COPY would be used if both the old and new file were intended to remain.
• The command changes OLD.TXT to NEW.TXT rather than creating another copy.
• COPY would be used if both the old and new file were intended to remain.
వివరణ:
Question 13
ప్రశ్న 13
A user enters `COPY A.TXT+B.TXT C.TXT` in DOS. What is the intended basic result?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• DOS COPY supports file concatenation using the plus sign between source files.
• In this command, the contents of A.TXT are followed by the contents of B.TXT in the destination C.TXT.
• This operation is commonly demonstrated with compatible text files.
• In this command, the contents of A.TXT are followed by the contents of B.TXT in the destination C.TXT.
• This operation is commonly demonstrated with compatible text files.
వివరణ:
Question 14
ప్రశ్న 14
Which DOS command clears the current command-prompt screen without deleting files or directories?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• CLS means clear screen and removes the currently displayed command-line text from the screen.
• It does not delete stored files or directories.
• DEL removes files, RD removes directories under suitable conditions and FORMAT prepares a disk or volume for use.
• It does not delete stored files or directories.
• DEL removes files, RD removes directories under suitable conditions and FORMAT prepares a disk or volume for use.
వివరణ:
Question 15
ప్రశ్న 15
Which DOS command is used to create a new directory?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• MD stands for Make Directory and creates a new directory.
• MKDIR is the equivalent longer command form.
• CD changes the current directory, RD removes a directory and DIR displays directory contents.
• MKDIR is the equivalent longer command form.
• CD changes the current directory, RD removes a directory and DIR displays directory contents.
వివరణ:
Question 16
ప్రశ్న 16
The current directory is C:EXAMDOS. Which command moves the current directory one level upward to C:EXAM?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• Two dots represent the parent directory in DOS path notation.
• `CD..` changes the current working directory to its parent, so C:EXAMDOS becomes C:EXAM.
• `CD` instead moves directly to the root directory of the current drive.
• `CD..` changes the current working directory to its parent, so C:EXAMDOS becomes C:EXAM.
• `CD` instead moves directly to the root directory of the current drive.
వివరణ:
Question 17
ప్రశ్న 17
Which statement about the DOS RD or RMDIR command is correct in its basic traditional use?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• RD means Remove Directory and RMDIR is its equivalent command form.
• In traditional basic DOS use, the target directory normally must be empty before it can be removed.
• TYPE, COPY and REN perform different file-management operations.
• In traditional basic DOS use, the target directory normally must be empty before it can be removed.
• TYPE, COPY and REN perform different file-management operations.
వివరణ:
Question 18
ప్రశ్న 18
Which command is synonymous with DEL for deleting files in DOS?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• ERASE and DEL provide the same basic file-deletion operation in DOS.
• Both can operate on specified filenames or wildcard patterns.
• TYPE displays file contents, CLS clears the screen and VER displays the DOS version.
• Both can operate on specified filenames or wildcard patterns.
• TYPE displays file contents, CLS clears the screen and VER displays the DOS version.
వివరణ:
Question 19
ప్రశ్న 19
A user wants to create a small text file named NOTE.TXT directly from keyboard input at the DOS command prompt. Which classic DOS command can be used for this purpose?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• CON represents the console device in DOS.
• `COPY CON NOTE.TXT` can accept keyboard input and copy it into the file NOTE.TXT until input is terminated with the appropriate end-of-file action.
• This is a classic DOS technique for creating a simple text file without starting a separate editor.
• `COPY CON NOTE.TXT` can accept keyboard input and copy it into the file NOTE.TXT until input is terminated with the appropriate end-of-file action.
• This is a classic DOS technique for creating a simple text file without starting a separate editor.
వివరణ:
Question 20
ప్రశ్న 20
Match List I with List II:
List I
(a) COPY
(b) DEL
(c) REN
(d) TYPE
List II
1. Displays the contents of a file
2. Changes a file or directory name
3. Duplicates a file or files
4. Removes a file or files
Choose the correct matching code.
List I
(a) COPY
(b) DEL
(c) REN
(d) TYPE
List II
1. Displays the contents of a file
2. Changes a file or directory name
3. Duplicates a file or files
4. Removes a file or files
Choose the correct matching code.
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• COPY duplicates files, giving (a)-3.
• DEL removes files, while REN changes names, giving (b)-4 and (c)-2.
• TYPE displays file contents on the screen, giving (d)-1.
• DEL removes files, while REN changes names, giving (b)-4 and (c)-2.
• TYPE displays file contents on the screen, giving (d)-1.
వివరణ:
Answer Key సమాధానాల పట్టిక
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Question 1 ప్రశ్న 1Answer: C. Internal commands are built into or made available by the command interpreter, whereas external commands are stored as separate program files. సమాధానం: C.
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Question 2 ప్రశ్న 2Answer: A. COPY సమాధానం: A.
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Question 3 ప్రశ్న 3Answer: D. FORMAT సమాధానం: D.
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Question 4 ప్రశ్న 4Answer: B. TYPE NOTES.TXT సమాధానం: B.
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Question 5 ప్రశ్న 5Answer: B. REN సమాధానం: B.
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Question 6 ప్రశ్న 6Answer: D. The file is deleted. సమాధానం: D.
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Question 7 ప్రశ్న 7Answer: A. DIR సమాధానం: A.
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Question 8 ప్రశ్న 8Answer: C. COPY REPORT.TXT BACKUP.TXT సమాధానం: C.
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Question 9 ప్రశ్న 9Answer: D. DEL *.TXT సమాధానం: D.
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Question 10 ప్రశ్న 10Answer: C. A single character position సమాధానం: C.
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Question 11 ప్రశ్న 11Answer: B. COPY, DEL, TYPE సమాధానం: B.
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Question 12 ప్రశ్న 12Answer: A. It changes the filename OLD.TXT to NEW.TXT. సమాధానం: A.
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Question 13 ప్రశ్న 13Answer: C. The contents of A.TXT and B.TXT are combined in sequence into C.TXT. సమాధానం: C.
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Question 14 ప్రశ్న 14Answer: A. CLS సమాధానం: A.
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Question 15 ప్రశ్న 15Answer: D. MD సమాధానం: D.
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Question 16 ప్రశ్న 16Answer: B. CD.. సమాధానం: B.
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Question 17 ప్రశ్న 17Answer: D. It removes a directory when the directory satisfies the required conditions, such as being empty in basic DOS usage. సమాధానం: D.
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Question 18 ప్రశ్న 18Answer: B. ERASE సమాధానం: B.
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Question 19 ప్రశ్న 19Answer: A. COPY CON NOTE.TXT సమాధానం: A.
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Question 20 ప్రశ్న 20Answer: C. (a)-3, (b)-4, (c)-2, (d)-1 సమాధానం: C.