Operating System (OS)
What is the name of the operating system which was originally designed by scientists and engineers for use by scientists and engineers?

None of these
XENIX
UNIX
OS/2
MS DOS

ANSWER DOWNLOAD EXAMIANS APP

Operating System (OS)
Assembler language

None of these
is a mnemonic form of machine language
requires fixed-format commands
is quite different from the SCL interpreter
is usually the primary user interface

ANSWER DOWNLOAD EXAMIANS APP

Operating System (OS)
The instruction register

is a group of electrical circuits (hardware), that performs the intent of instructions fetched from memory.
None of these
is a hardware memory device which denotes the location of the current instruction being executed.
contains the address of the memory location that is to be read from or stored into.
contains a copy of the designated memory location specified by the MAR after a "read" or the new contents of the memory prior to a "write".

ANSWER DOWNLOAD EXAMIANS APP