Please keep at least one language enabled. || కనీసం ఒక భాషను ఎంచుకోండి.
Question 1
ప్రశ్న 1
What is the primary purpose of the DOS DIR command?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• DIR displays the contents of a specified directory or, if none is specified, the current directory.
• Its output normally includes filenames and subdirectory names and may also show information such as file sizes and dates.
• DIR is a viewing command and does not itself delete, format or change the system date.
• Its output normally includes filenames and subdirectory names and may also show information such as file sizes and dates.
• DIR is a viewing command and does not itself delete, format or change the system date.
వివరణ:
Question 2
ప్రశ్న 2
The current directory is C:EXAMDOSCOMMANDS. What is the result of executing `CD `?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• A backslash by itself represents the root directory of the current drive in DOS path notation.
• Therefore `CD ` changes the current directory directly to C: when C: is the current drive.
• `CD ..` would instead move upward by one directory level.
• Therefore `CD ` changes the current directory directly to C: when C: is the current drive.
• `CD ..` would instead move upward by one directory level.
వివరణ:
Question 3
ప్రశ్న 3
Which DOS command creates a new directory named PRACTICE in the current location?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• MD stands for Make Directory and creates a directory with the specified name.
• MKDIR is another form of the same command.
• CD changes the current directory, RD removes a directory and DIR displays directory contents.
• MKDIR is another form of the same command.
• CD changes the current directory, RD removes a directory and DIR displays directory contents.
వివరణ:
Question 4
ప్రశ్న 4
In traditional basic DOS usage, what condition is normally required before `RD TEST` can successfully remove the directory TEST?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• RD, or RMDIR, removes a directory.
• In traditional basic DOS use, the target directory normally must contain no files or subdirectories before it can be removed.
• Files and subdirectories therefore need to be dealt with before applying RD to a non-empty directory.
• In traditional basic DOS use, the target directory normally must contain no files or subdirectories before it can be removed.
• Files and subdirectories therefore need to be dealt with before applying RD to a non-empty directory.
వివరణ:
Question 5
ప్రశ్న 5
What will the DOS command `DIR *.TXT` primarily display?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• The asterisk is a wildcard representing a variable sequence of characters.
• `*.TXT` therefore matches filenames having the .TXT extension.
• DIR applies that pattern when displaying matching directory entries.
• `*.TXT` therefore matches filenames having the .TXT extension.
• DIR applies that pattern when displaying matching directory entries.
వివరణ:
Question 6
ప్రశ్న 6
The current directory is C:POLICEASIPAPER3. Which command changes the current directory to C:POLICEASI?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• Two dots represent the parent directory in DOS path notation.
• `CD ..` therefore moves from C:POLICEASIPAPER3 to C:POLICEASI.
• `CD ` would move directly to the root of the current drive rather than only one level upward.
• `CD ..` therefore moves from C:POLICEASIPAPER3 to C:POLICEASI.
• `CD ` would move directly to the root of the current drive rather than only one level upward.
వివరణ:
Question 7
ప్రశ్న 7
Which DIR option is traditionally used to pause a long directory listing after each screenful of information?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• `DIR /P` pauses the directory listing after each screenful so that the user has time to read it.
• The user can then continue to the next screen of results.
• This option is useful when the directory contains more entries than can fit on one display screen.
• The user can then continue to the next screen of results.
• This option is useful when the directory contains more entries than can fit on one display screen.
వివరణ:
Question 8
ప్రశ్న 8
What is the purpose of the DOS command `DIR /W`?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• The /W option requests a wide directory display.
• It places more filenames across each display line and normally shows fewer details per file than the standard listing.
• It is useful when the user mainly wants a compact view of filenames.
• It places more filenames across each display line and normally shows fewer details per file than the standard listing.
• It is useful when the user mainly wants a compact view of filenames.
వివరణ:
Question 9
ప్రశ్న 9
The DOS prompt currently shows C:>. What normally happens when the user enters `D:` and drive D: is available?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• In DOS, entering a drive letter followed by a colon changes the active drive.
• Therefore `D:` changes the current drive from C: to D: when that drive is available.
• It does not format, delete or create a directory.
• Therefore `D:` changes the current drive from C: to D: when that drive is available.
• It does not format, delete or create a directory.
వివరణ:
Question 10
ప్రశ్న 10
What is the primary effect of the command `DIR /S` in traditional DOS?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• The /S option extends a DIR search or listing through subdirectories beneath the specified directory.
• It is useful for finding or listing matching files throughout a directory tree.
• It does not physically rearrange files or change the active drive.
• It is useful for finding or listing matching files throughout a directory tree.
• It does not physically rearrange files or change the active drive.
వివరణ:
Question 11
ప్రశ్న 11
Which DOS disk command is traditionally used to examine a disk's file-system status and report disk-related errors?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• CHKDSK means Check Disk and examines the logical condition of a disk or volume.
• It can report information about disk usage and file-system errors.
• In traditional DOS, options such as /F can be used to request correction of certain detected logical errors.
• It can report information about disk usage and file-system errors.
• In traditional DOS, options such as /F can be used to request correction of certain detected logical errors.
వివరణ:
Question 12
ప్రశ్న 12
Which DOS command is used to prepare a disk or volume with a file system for storing files, an operation that can destroy existing data on the target?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• FORMAT prepares a disk or volume for use by establishing the required file-system structures.
• Formatting can remove access to existing data on the target and must therefore be used carefully.
• DIR and TYPE display information, while VER reports the operating-system version.
• Formatting can remove access to existing data on the target and must therefore be used carefully.
• DIR and TYPE display information, while VER reports the operating-system version.
వివరణ:
Question 13
ప్రశ్న 13
Which DOS command displays the version of DOS currently running?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• VER means Version and displays information identifying the DOS version in use.
• VOL displays volume information, while DATE works with the system date.
• SYS is associated with transferring system files to a disk.
• VOL displays volume information, while DATE works with the system date.
• SYS is associated with transferring system files to a disk.
వివరణ:
Question 14
ప్రశ్న 14
Which DOS command is primarily used to display the volume label and related volume identification information for a disk?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• VOL displays the volume label of the specified or current disk and, in applicable DOS versions, its volume serial information.
• A volume label is a descriptive name assigned to a disk or volume.
• VER and TIME display different system information.
• A volume label is a descriptive name assigned to a disk or volume.
• VER and TIME display different system information.
వివరణ:
Question 15
ప్రశ్న 15
Which DOS command is used to display or set the system date?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• DATE is the DOS command used to display and, where permitted, modify the system date.
• TIME performs the corresponding operation for system time.
• VER and VOL report version and disk-volume information respectively.
• TIME performs the corresponding operation for system time.
• VER and VOL report version and disk-volume information respectively.
వివరణ:
Question 16
ప్రశ్న 16
Which DOS command is used to display or set the computer's system time?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• TIME displays the current system time and can be used to enter a new time where permitted.
• DATE performs a similar function for the calendar date.
• VOL and DIR display disk-volume and directory information.
• DATE performs a similar function for the calendar date.
• VOL and DIR display disk-volume and directory information.
వివరణ:
Question 17
ప్రశ్న 17
What is the traditional purpose of the DOS SYS command?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• SYS is a traditional DOS utility used to transfer the essential system files needed for DOS startup to a target disk.
• It was commonly used when preparing or repairing bootable DOS disks.
• It does not simply sort, display or remove attributes from files.
• It was commonly used when preparing or repairing bootable DOS disks.
• It does not simply sort, display or remove attributes from files.
వివరణ:
Question 18
ప్రశ్న 18
What is the primary purpose of the traditional DOS DISKCOPY command?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• DISKCOPY is a traditional DOS utility intended for duplicating one floppy disk onto another compatible floppy disk.
• It differs from COPY, which operates on individual files or groups of files.
• The command was particularly useful when floppy disks were commonly used for software and data transfer.
• It differs from COPY, which operates on individual files or groups of files.
• The command was particularly useful when floppy disks were commonly used for software and data transfer.
వివరణ:
Question 19
ప్రశ్న 19
Which DOS command is traditionally used to create, change or remove the volume label assigned to a disk?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• LABEL is used to assign or modify a descriptive volume label for a disk.
• A volume label helps users identify a disk independently of its drive letter.
• VER, SYS and CHKDSK perform version, system-transfer and disk-checking functions.
• A volume label helps users identify a disk independently of its drive letter.
• VER, SYS and CHKDSK perform version, system-transfer and disk-checking functions.
వివరణ:
Question 20
ప్రశ్న 20
Assume no directory named PRACTICE currently exists. Which sequence correctly creates PRACTICE, makes it the current directory, and then displays its contents?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• `MD PRACTICE` first creates the new directory.
• `CD PRACTICE` then changes the current working directory to that newly created directory.
• Finally, DIR displays the contents of the current PRACTICE directory, so the sequence correctly performs all three requested operations.
• `CD PRACTICE` then changes the current working directory to that newly created directory.
• Finally, DIR displays the contents of the current PRACTICE directory, so the sequence correctly performs all three requested operations.
వివరణ:
Answer Key సమాధానాల పట్టిక
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Question 1 ప్రశ్న 1Answer: B. To display a list of files and subdirectories in a directory సమాధానం: B.
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Question 2 ప్రశ్న 2Answer: D. The current directory changes to the root directory C:. సమాధానం: D.
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Question 3 ప్రశ్న 3Answer: A. MD PRACTICE సమాధానం: A.
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Question 4 ప్రశ్న 4Answer: C. TEST must be empty. సమాధానం: C.
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Question 5 ప్రశ్న 5Answer: C. Files in the selected directory whose extension is .TXT సమాధానం: C.
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Question 6 ప్రశ్న 6Answer: A. CD .. సమాధానం: A.
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Question 7 ప్రశ్న 7Answer: D. /P సమాధానం: D.
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Question 8 ప్రశ్న 8Answer: B. To display the directory listing in a wide-format arrangement సమాధానం: B.
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Question 9 ప్రశ్న 9Answer: A. The current drive changes to D:. సమాధానం: A.
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Question 10 ప్రశ్న 10Answer: C. It displays matching files in the specified directory and its subdirectories. సమాధానం: C.
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Question 11 ప్రశ్న 11Answer: D. CHKDSK సమాధానం: D.
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Question 12 ప్రశ్న 12Answer: B. FORMAT సమాధానం: B.
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Question 13 ప్రశ్న 13Answer: C. VER సమాధానం: C.
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Question 14 ప్రశ్న 14Answer: D. VOL సమాధానం: D.
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Question 15 ప్రశ్న 15Answer: A. DATE సమాధానం: A.
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Question 16 ప్రశ్న 16Answer: B. TIME సమాధానం: B.
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Question 17 ప్రశ్న 17Answer: B. To transfer the required DOS system files to a disk so that it can be made bootable under the appropriate DOS environment సమాధానం: B.
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Question 18 ప్రశ్న 18Answer: C. To copy the contents of one floppy disk to another compatible floppy disk సమాధానం: C.
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Question 19 ప్రశ్న 19Answer: D. LABEL సమాధానం: D.
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Question 20 ప్రశ్న 20Answer: A. MD PRACTICE → CD PRACTICE → DIR సమాధానం: A.