Computer & IT

note!Answer: A) System time
The TIME command in DOS displays and sets the system time.

note!Answer: A) Batch file
A batch file (.BAT) contains a series of DOS commands that run in sequence.

note!Answer: A) /v
The /V switch makes COPY verify that the files were written correctly.

note!Answer: A) Dir/ah
DIR /AH lists only files that have the hidden attribute.

note!Answer: C) Both a and b
CHDIR and CD are two names for the same command that changes the current directory.

note!Answer: D) Dir/c
DIR /C displays the compression ratio for each file on a compressed (DoubleSpace) drive.

note!Answer: B) Dir
The DIR command lists the files and directories in the current drive or directory.

note!Answer: A) C
The valid DOS file attributes are R (read-only), H (hidden), S (system) and A (archive). C is not one of them.

note!Answer: C) |
The pipe symbol | is used to send output to MORE, for example DIR | MORE.

note!Answer: A) Himem.SYS
HIMEM.SYS manages extended memory and the high memory area in DOS. EMM386.EXE provides expanded memory emulation.

note!Answer: B) Root directory
The root directory is created automatically when a disk is formatted, so MD cannot create it. All other directories are created inside an existing directory.

note!Answer: C) /
The forward slash (/) is reserved as a switch and path separator in DOS, so it cannot be used in a file name.

note!Answer: D) External commands
External commands are stored as separate program files on disk and must be loaded to run. Internal commands are built into COMMAND.COM.

note!Answer: B) Autoexec.bat
AUTOEXEC.BAT is a batch file that DOS runs automatically at startup. CONFIG.SYS is also a startup file but it sets system configuration.

note!Answer: B) Doskey
DOSKEY is a utility that records commands typed at the DOS prompt so they can be recalled and edited.

note!Answer: B) Diskcopy
DISKCOPY makes an exact sector-by-sector copy of an entire floppy diskette. COPY and XCOPY copy individual files.

note!Answer: B) F1
The F1 key opens help in most Windows-based programs.

note!Answer: C) /s
The /s switch with the DIR command lists files in the specified directory and all its subdirectories.

note!Answer: C) /q
The /q switch with FORMAT performs a quick format, which erases the file table without a full surface scan.

note!Answer: A) *
The asterisk (*) is a wildcard that stands for any group of characters. The question mark (?) stands for a single character.