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1

### GATE CSE 1991

Subjective
Match the pairs in the following question by writing the corresponding letters only.

$$A - R,\,\,B - P,\,\,C - S,\,\,D - Q$$
2

### GATE CSE 1990

True or False
State whether the following statements are TRUE or FALSE with reason.
A
TRUE
B
FALSE
3

### GATE CSE 1990

Subjective
In a two -level virtual memory, the memory access time for main memory, $${t_M} = {10^{ - 8}}\sec$$ and the memory access time for the secondary memory, tag $$= {10^{ - 3}}.$$ What must be the hit ratio, $$H$$ such that the access efficiency is within $$80$$ percent of its maximum value?

Hit ratio must be less than or equal to $$80$$%
4

### GATE CSE 1990

Fill in the Blanks
Under paged memory management scheme simple lock and key memory protection arrangement may still be required if the $$........$$ processors do not have address mapping hardware.

Input-output

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