Operating System

note!Answer: C) Undelete /list
UNDELETE /LIST shows the deleted files that can be recovered.

note!Answer: A) CD..
CD.. moves up one level to the parent directory. CD\ goes to the root directory.

note!Answer: D) Dir/w
DIR /W displays file names in wide format, in multiple columns.

note!Answer: A) date
The DATE command displays the current system date and lets you change it.

note!Answer: C) BAK
The .BAK extension is conventionally used for backup copies of files.

note!Answer: B) Emm386.Exe
EMM386.EXE is the memory manager that uses the upper memory area on 386+ systems to load drivers and programs.

note!Answer: C) Subset
The SUBST command maps a folder path to a drive letter, creating a logical drive.

note!Answer: B) Scandisk
SCANDISK checks the disk and automatically repairs minor logical errors.

note!Answer: C) Subset
SUBST (printed as Subset) assigns a drive letter to a specific location on the disk.

note!Answer: A) /p
The /P switch prompts for confirmation before deleting files with the DEL command.

note!Answer: A) Up to 8 characters
In DOS, the primary file name can have up to 8 characters, followed by an optional extension of up to 3 characters.

note!Answer: B) Copy A:\rdoc C:\work
The source is the floppy (A:\rdoc) and the destination is the work folder on the hard disk (C:\work).

note!Answer: D) Dir/ad
The /AD switch makes DIR list only directories (folders).

note!Answer: A) Copy F1+F2 F3
COPY source1+source2 destination concatenates files into a new file.

note!Answer: B) Path
The PATH command tells DOS where to find executable programs in other directories or disks.

note!Answer: B) Tree
The TREE command graphically displays the directory structure of a disk.

note!Answer: B) CHDIR
CHDIR (or CD) changes the current directory, which is how you move into or open a directory.

note!Answer: B) Format
FORMAT divides the disk into tracks and sectors and assigns addresses to them.

note!Answer: B) CD\
CD\ changes the current directory directly to the root directory.

note!Answer: A) Del
DEL is built into COMMAND.COM, so it is an internal command; SCANDISK, CHKDSK and DELTREE are external utilities.