1 Shadow page table stores the mappings A from applica.pdf

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The document contains 4 multiple choice questions about virtualization concepts: 1) Shadow page tables map application virtual addresses to guest physical addresses. 2) After a TLB miss, the page table is searched. 3) When host memory is overcommitted, transparent page sharing should be used as a last resort. 4) Decoupling virtual and physical I/O devices does not allow rolling back a file system without guest OS involvement.

Formation

1. Shadow page table stores the mappings ...
A. from application virtual address to guest physical address
B. from guest physical address to host physical address
C. from application virtual address to host physical address
D. from host physical address to guest physical address
2. What happens after a TLB (translation look-aside buffer) miss?
A. Page fault is generated
B. Page table is searched
C. Segmentation error is generated
D. Trap to hypervisor
3.While memory is overcommitted at host level, which of the following mechanisms should be
applied as the last approach after all other methods have been tried and reached their limit?
A. Memory ballooning
B. Hypervisor-level paging
C. Memory compression
D. Transparent page sharing
4.
Which of the following is NOT the benefit of decoupling the virtual machine's logical I/O devices
from the host physical devices?
Allowing sharing of the same physical I/O devices among multiple virtual machines.
Reducing the I/O latency for applications running in virtual machine.
Migrating a virtual machine from one host to another.
Rollback of file system to a previous state without guest OS involvement.
A.
Allowing sharing of the same
physical I/O devices among
multiple virtual machines.
B.
Reducing the I/O latency for
applications running in virtual
machine.
C.
Migrating a virtual machine
from one host to another.
D.
Rollback of file system to a
previous state without guest OS
involvement.

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