Computer & IT

note!Answer: A) CHDIR
CHDIR changes the current directory and does not create one. MD and MKDIR both create directories.

note!Answer: A) Assembler
An assembler translates assembly (low-level) language into machine code.

note!Answer: A) UNIX
The shell is a command interpreter characteristic of UNIX-like systems.

note!Answer: A) Process
A program under execution is known as a process.

note!Answer: B) Turnaround time
Turnaround time is the total time from job submission to job completion.

note!Answer: C) Transfer the system files to disk
SYS copies the DOS system files to a disk so it becomes bootable.

note!Answer: C) CD\
CD\ changes the current directory to the root (main) directory in one step.

note!Answer: C) Attrib+h
ATTRIB +H sets the hidden attribute on a file, hiding it from normal listings.

note!Answer: A) Ctrl+c
Ctrl+C (Ctrl+Break) interrupts or stops a running DOS program.

note!Answer: A) Deltree
DELTREE deletes a directory along with all its files and subdirectories.

note!Answer: C) Defrag
DEFRAG rearranges fragmented file pieces so they are stored contiguously, improving disk performance.

note!Answer: C) Sys
SYS copies the hidden system files (IO.SYS, MSDOS.SYS) and COMMAND.COM to another disk.

note!Answer: B) 255 character
Windows allows long file names up to 255 characters (the 8-character limit was the old DOS 8.3 format).

note!Answer: D) File compression
WinZip is a utility that compresses files into archives (zip files) and extracts them.

note!Answer: B) Indicates an action to be performed during execution of assembled program
Imperative statements tell the machine what action to perform at execution time. Declarative statements, by contrast, reserve storage and associate names.

note!Answer: D) Any of the above
A busy process, high I/O rates, and high paging rates can each slow response time. Any of them can therefore cause it.

note!Answer: A) Number of programs processed by it per unit time
Throughput is the number of jobs or programs a system completes per unit of time. It is a standard measure of system performance.

note!Answer: C) The number of logical records in one physical record
The blocking factor is how many logical records fit into one physical block. It determines how efficiently I/O is used.

note!Answer: B) LIFO (Last in First out)
Nested macro calls are expanded in a stack-like manner, so the most recently started expansion finishes first. This is LIFO behaviour.

note!Answer: B) LIFO rule.
Nested macro calls are expanded using LIFO (last in, first out). This is the standard rule taught for macro processing.