Operating System (OS)
Which, of the following checks, cannot be carried out on the input data to a system?

All of these
Range check
None of these
Syntax check
consistency check

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Operating System (OS)
The Memory Buffer Register (MBR)

is a group of electrical circuits (hardware), that performs the intent of instructions fetched from memory.
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".
contains the address of the memory location that is to be read from or stored into.
is a hardware memory device which denotes the location of the current instruction being executed.
None of these

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Operating System (OS)
The LRU algorithm

pages out the first page in a given area
pages out pages that have not been used recently
pages out pages that have been used recently
pages out pages that have been least used recently
None of these

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Operating System (OS)
Uniform Symbols Table

contains all constants in the program
consists of a full or partial list of the token's as they appear in the program. Created by Lexical analysis and used for syntax analysis and interpretation
a permanent table of decision rules in the form of patterns for matching with the uniform symbol table to discover syntactic structure
None of these
a permanent table which lists all key words and special symbols of the language in symbolic form

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