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OS Memory Management
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OS Memory Management
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OS Memory Management
If there are 32 segments, each of size 1Kb, then the logical address should have ____________
13 bits
14 bits
15 bits
16 bits
To specify a particular segment, 5 bits are required. To select a particular byte after selecting a page, 10 more bits are required. Hence 15 bits are required.
Author:
rikazzz
Comment
OS Memory Management
Transient operating system code is code that ____________
is not easily accessible
comes and goes as needed
stays in the memory always
never enters the memory space
Author:
rikazzz
Comment
OS Memory Management
The operating system maintains a ______ table that keeps track of how many frames have been allocated, how many are there, and how many are available.
page
mapping
frame
memory
Author:
rikazzz
Comment
OS Memory Management
In a paged memory, the page hit ratio is 0.35. The required to access a page in secondary memory is equal to 100 ns. The time required to access a page in primary memory is 10 ns. The average time required to access a page is?
3.0 ns
68.0 ns
68.5 ns
78.5 ns
Author:
rikazzz
Comment
OS Memory Management
The run time mapping from virtual to physical addresses is done by a hardware device called the ____________
Virtual to physical mapper
Memory management unit
Memory mapping unit
None of the mentioned
Author:
rikazzz
Comment
OS Memory Management
Illegal addresses are trapped using the _____ bit.
error
protection
valid – invalid
access
Author:
rikazzz
Comment
OS Memory Management
The idea of overlays is to ____________
data that are needed at any given time
enable a process to be larger than the amount of memory allocated to it
keep in memory only those instructions
all of the mentioned
Author:
rikazzz
Comment
OS Memory Management
The address loaded into the memory address register of the memory is referred to as ____________
Physical address
Logical address
Neither physical nor logical
None of the mentioned
Author:
rikazzz
Comment
OS Memory Management
The ___________ must design and program the overlay structure.
programmer
system architect
system designer
none of the mentioned
Author:
rikazzz
Comment
OS Memory Management
The page table contains ____________
base address of each page in physical memory
page offset
page size
none of the mentioned
Author:
rikazzz
Comment
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