Operating System

53. A task in a blocked state

is executable
is running
must still be placed in the run queues
is waiting for same temporarily unavailable resources
✅ The correct answer is D.

57. The Memory Address Register

is a hardware memory device which denotes the location of the current instruction being executed.
is a group of electrical circuits (hardware), that performs the intent of instructions fetched from memory.
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”.
✅ The correct answer is C.

58. Fonts install from

Add from control panel
Font setup file
Font.exe file
All of above
✅ The correct answer is D.