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1

### GATE CSE 1997

Dirty bit for a page in a page table
A
Helps avoid unnecessary writes on a paging device
B
Helps maintain $$LRU$$ information
C
Allows only read on a page
D
None of the above.
2

### GATE CSE 1997

Thrashing
A
Reduces page $$I/O$$
B
Decreases the degree of multiprogramming
C
Implies excessive page $$I/O$$
D
Improve the system performance
3

### GATE CSE 1997

Locality of reference implies that the page reference being made by a process
A
Will always be to the page used in the previous page reference
B
Is likely to be to one of the pages used in the last few page references
C
Will always be to one of the pages existing in memory
D
Will always lead to a page fault
4

### GATE CSE 1996

A ROM is sued to store the table for multiplication of two $$8$$-bit unsigned integers. The size of ROM required is
A
$$256 \times 16$$
B
$$64\,K \times 8$$
C
$$4\,K \times 16$$
D
$$64\,K \times 16$$
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