Alert dont submit AI generated answer. ### Compaction Strategies in Memory Management**Task:**Calculate the cost of compacting memory holes using the following strategies, given that moving 1 Kbyte costs 50 centavos.**Initial Memory Layout:**- **OS**: Occupies 0-400k- **P1**: Occupies 400k-700k- **P2**: Occupies 700k-1200k- **P3**: Occupies 1300k-1800k- **P4**: Occupies 2100k-2400k- Total memory space is 3100kThe memory contains free holes between:- 1200k-1300k- 1800k-2100k- 2400k-2800k**Compaction Strategies:**a) **Strategy A**: Move P3 and P4 up to eliminate space between 1200k-1300k and 1800k-2100k. - Calculation: Determine movement for P3 and P4.b) **Strategy B**: Move P4 to the end of P1 and P2, compacting space 2400k-2800k. - Calculation: Determine movement for P4.c) **Strategy C**: Move P3 and P4 to eliminate all existing spaces in one step. - Calculation: Determine movement for both P3 and P4 together.d) **Strategy D**: Shift P4 up to fill spaces, leaving P3 in place. - Calculation: Determine movement for P4.**Cost Formula:**\[ \text{Cost} = \text{Number of Kbytes Moved} \times 50 \text{ centavos} \]For each strategy, calculate the total cost of compaction.

Here given as,1 k byte= 50 centavos. and we need to find the cost of each memory. So we will see in…

Compaction Given the following memory status below, compute how much does it cost to compact holes together with the following compaction strategies if 1 kbyte, of movement costs 50 centavos. OS OS OS P1 P3 P2 P1 P2 400k 700k 1200k 1300k 1800k 2100k 2400k 2800k 3100k P1 P2 P3 P4 a) Cost=P P3 P4 b) Cost=P P4 OS P1 P2 c) Cost = P P3 P4 OS P2 P1 P4 P3 d) Cost=P

Compaction Given the following memory status below, compute how much does it cost to compact holes together with the following compaction strategies if 1 kbyte, of movement costs 50 centavos. OS OS OS P1 P3 P2 P1 P2 400k 700k 1200k 1300k 1800k 2100k 2400k 2800k 3100k P1 P2 P3 P4 a) Cost=P P3 P4 b) Cost=P P4 OS P1 P2 c) Cost = P P3 P4 OS P2 P1 P4 P3 d) Cost=P

Database System Concepts

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ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Alert dont submit AI generated answer.

### Compaction Strategies in Memory Management

**Task:**
Calculate the cost of compacting memory holes using the following strategies, given that moving 1 Kbyte costs 50 centavos.

**Initial Memory Layout:**

- **OS**: Occupies 0-400k
- **P1**: Occupies 400k-700k
- **P2**: Occupies 700k-1200k
- **P3**: Occupies 1300k-1800k
- **P4**: Occupies 2100k-2400k
- Total memory space is 3100k

The memory contains free holes between:
- 1200k-1300k
- 1800k-2100k
- 2400k-2800k

**Compaction Strategies:**

a) **Strategy A**: Move P3 and P4 up to eliminate space between 1200k-1300k and 1800k-2100k.
- Calculation: Determine movement for P3 and P4.

b) **Strategy B**: Move P4 to the end of P1 and P2, compacting space 2400k-2800k.
- Calculation: Determine movement for P4.

c) **Strategy C**: Move P3 and P4 to eliminate all existing spaces in one step.
- Calculation: Determine movement for both P3 and P4 together.

d) **Strategy D**: Shift P4 up to fill spaces, leaving P3 in place.
- Calculation: Determine movement for P4.

**Cost Formula:**
\[ \text{Cost} = \text{Number of Kbytes Moved} \times 50 \text{ centavos} \]

For each strategy, calculate the total cost of compaction.

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