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Ch09-Memory Management_part02

Authored by 徐leo 徐leo

Computers

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Ch09-Memory Management_part02
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10 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

總記憶體空間足夠,但卻沒有合適的Partitions供Program使用,稱為?

External Fragmentation

Internal Fragmentation

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Program分配到的記憶體空間比所需空間大,未使用到的部分,稱為?

External Fragmentation

internal Fragmentation

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

External Fragmentation有兩種解決方法,請問Paging是屬於哪一種解決方法所用的技術?

聚集 ( compaction )

不分配連續的記憶體空間 ( non-contiguous memory space )

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

以下對於分頁 ( Paging )描述何者有誤?

由OS與電腦硬體共同實作

允許程式以連續記憶體方式載入

會有一個page table紀錄 page 與 frame 的對應

仍有Internal fragment問題

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

以下對於Page table 描述,何者錯誤?

協助將 logical address 對應出 Physical address

由OS 負責Page table

一個Process有屬於自己的Page table

Page table 存放在HD中

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

假設系統有40個User program ,都會呼叫libc程式庫(2MB),透過shared page 技術,共需要多少記憶體空間供libc使用?

80MB

2MB

7.

MULTIPLE SELECT QUESTION

45 sec • 1 pt

解決page table 太大可能也會有external fragmentation,解決方法為何?(複選)

階層式分頁 ( Hierarchical Page Table)

雜湊分頁表 ( Hashed Page Table )

反轉分頁表 ( Inverted Page Table )

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