RAID and Data Integrity Practice Test
Practice test on RAID levels, trade-offs, and integrity techniques from RAID and Data Integrity: Advanced Operating Systems Chapters 38 and 44.
12 questions · pass mark 70% · try 5 free
1 What is the main purpose of RAID?
- To compress files automatically
- To build storage that is faster, larger, and more reliable
- To replace file systems
- To eliminate all disk failures
RAID combines multiple disks to improve performance, capacity, and reliability compared with a single disk.
2 To the file system, a RAID typically appears as a single logical disk.
- True
- False
The material states that RAID presents itself externally as a linear array of blocks like a single disk.
3 Which RAID level focuses on striping without redundancy?
- RAID 0
- RAID 1
- RAID 4
- RAID 5
RAID 0 stripes data across disks for performance but does not provide fault tolerance.
4 Which statements about RAID 1 are correct?
Select all that apply
- It stores multiple copies of each block
- It uses parity instead of duplication
- Reads may be served from either copy
- Writes must update all copies
RAID 1 is mirroring: it duplicates blocks on separate disks, allows a read from either copy, and requires writes to update every copy.
5 What is a major trade-off of RAID 1?
- Poor read flexibility
- High capacity cost
- No fault tolerance
- No write support
Mirroring is simple and reliable, but it consumes much more storage capacity because data is duplicated.
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