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A memory page containing a heavily used variable that was initialized very early and is in constant use is removed, when the page replacement algorithm used is
- a)LRU
- b)FIFO
- c)LFU
- d)None of these
Correct answer is option 'B'. Can you explain this answer?
Verified Answer
A memory page containing a heavily used variable that was initialized ...
Since the page is used heavily then it can not be removed if LFU used, since it is in constant used, hence it can’t be removed if LRU is used. Using FIFO only it can be removed effectively.
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A memory page containing a heavily used variable that was initialized ...
Page Replacement Algorithm: FIFO
Page replacement algorithm is used by the operating system to manage memory when a page fault occurs. When a page fault occurs, the operating system replaces the page that was least recently used or the page that was first in, first out, depending on the page replacement algorithm used.
FIFO (First-In-First-Out) is one of the page replacement algorithms. In the FIFO algorithm, the operating system replaces the page that was first brought into memory. This means that the page that has been in memory the longest is the one that is replaced.
Heavily Used Variable and Early Initialization
In computer programming, a variable is a storage location that holds a value. A heavily used variable is a variable that is used frequently in the program. Early initialization means that the variable is initialized at the beginning of the program, before it is used.
Memory Page Removal
A memory page is a block of memory that is used to store data or code. When a memory page containing a heavily used variable that was initialized very early and is in constant use is removed, it means that the page is removed from memory and the data or code that was stored in it is no longer accessible.
Explanation
In the FIFO page replacement algorithm, the operating system removes the page that was first brought into memory. This means that if a memory page containing a heavily used variable that was initialized very early and is in constant use was the first page brought into memory, it will be the first page to be removed from memory when a page fault occurs. This can cause problems for the program because the heavily used variable will no longer be accessible and the program may not function correctly.
Page replacement algorithm is used by the operating system to manage memory when a page fault occurs. When a page fault occurs, the operating system replaces the page that was least recently used or the page that was first in, first out, depending on the page replacement algorithm used.
FIFO (First-In-First-Out) is one of the page replacement algorithms. In the FIFO algorithm, the operating system replaces the page that was first brought into memory. This means that the page that has been in memory the longest is the one that is replaced.
Heavily Used Variable and Early Initialization
In computer programming, a variable is a storage location that holds a value. A heavily used variable is a variable that is used frequently in the program. Early initialization means that the variable is initialized at the beginning of the program, before it is used.
Memory Page Removal
A memory page is a block of memory that is used to store data or code. When a memory page containing a heavily used variable that was initialized very early and is in constant use is removed, it means that the page is removed from memory and the data or code that was stored in it is no longer accessible.
Explanation
In the FIFO page replacement algorithm, the operating system removes the page that was first brought into memory. This means that if a memory page containing a heavily used variable that was initialized very early and is in constant use was the first page brought into memory, it will be the first page to be removed from memory when a page fault occurs. This can cause problems for the program because the heavily used variable will no longer be accessible and the program may not function correctly.
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A memory page containing a heavily used variable that was initialized very early and is in constant use is removed, when the page replacement algorithm used isa)LRUb)FIFOc)LFUd)None of theseCorrect answer is option 'B'. Can you explain this answer?
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