Memory: Review Questions - lyuanschool/SystemProgramming GitHub Wiki

Question numbers subject to change

Q1

What are the following and what is their purpose?

• Translation Lookaside Buffer
• Physical Address
• Memory Management Unit
• The dirty bit

Q2

How do you determine how many bits are used in the page offset?

Q3

20 ms after a context switch the TLB contains all logical addresses used by your numerical code which performs main memory access 100% of the time. What is the overhead (slowdown) of a two-level page table compared to a single-level page table?

Q4

Explain why the TLB must be flushed when a context switch occurs (i.e. the CPU is assigned to work on a different process).