Q2. [ Consider a 48-bit virtual address space. The system uses a page size of 4KB and two-level hierarchical paging. Therefore, the page table is divided into 4KB pages and the logical address has the following format: P1 a) [ Below are the relevant tables. The values are provided in hexadecimal. Outer Page Table Page A of Page Table 0 Page A of PT 0 FEE 1 Page B of PT 1 3BC X (rest are invalid) Size of P1 = 000000000000 P2 2 3 X 000003003102 000001002777 What is the size (number of bits) of each of the following logical address fields: bits bits Offset 124 C3D (rest are invalid) Size of P2 = Size of Offset= b) In what is the physical/logical address corresponding to each of the following shown logical/physical addresses. Answer "Bad logical address" if the logical address is invalid. Logical Address bits Page B of the Page Table 0 330 1 44B 2 X Physical Address 44B3BC E55 (rest are invalid)

Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
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Q2. [
Consider a 48-bit virtual address space. The system uses a page size of 4KB
and two-level hierarchical paging. Therefore, the page table is divided into 4KB pages and the
logical address has the following format:
P1
a) [
Below are the relevant tables. The values are provided in hexadecimal.
Outer Page Table
Page A of Page Table
0
Page A of PT
0
FEE
1
1
3BC
X
124
C3D
(rest are invalid)
Page B of PT
(rest are invalid)
Size of P1 =
000000000000
2
3
X
What is the size (number of bits) of each of the following logical address fields:
bits
000003003102
P2
000001002777
Size of P2 =
Size of Offset=
b)
what is the physical/logical address corresponding to each of the following
shown logical/physical addresses. Answer "Bad logical address" if the logical address is
invalid.
Logical Address
bits
Offset
bits
Page B of the Page Table
0
330
1
44B
2
E55
X
(rest are invalid)
Physical Address
44B3BC
Transcribed Image Text:Q2. [ Consider a 48-bit virtual address space. The system uses a page size of 4KB and two-level hierarchical paging. Therefore, the page table is divided into 4KB pages and the logical address has the following format: P1 a) [ Below are the relevant tables. The values are provided in hexadecimal. Outer Page Table Page A of Page Table 0 Page A of PT 0 FEE 1 1 3BC X 124 C3D (rest are invalid) Page B of PT (rest are invalid) Size of P1 = 000000000000 2 3 X What is the size (number of bits) of each of the following logical address fields: bits 000003003102 P2 000001002777 Size of P2 = Size of Offset= b) what is the physical/logical address corresponding to each of the following shown logical/physical addresses. Answer "Bad logical address" if the logical address is invalid. Logical Address bits Offset bits Page B of the Page Table 0 330 1 44B 2 E55 X (rest are invalid) Physical Address 44B3BC
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