By: Prof. Dr. Fazal Rehman | Last updated: September 23, 2024
MCQs on RAID Technology in DBMS
What does RAID stand for in the context of data storage?A. Redundant Array of Inexpensive Disks
B. Redundant Array of Independent Disks
C. Reliable Array of Independent Disks
D. Reliable Array of Inexpensive Disks
Answer: B. Redundant Array of Independent Disks
Which RAID level uses striping without any redundancy?A. RAID 0
B. RAID 1
C. RAID 5
D. RAID 10
Answer: A. RAID 0
What is the main advantage of RAID 1?A. High read and write speed
B. Data mirroring for fault tolerance
C. High storage efficiency
D. Improved read speed but slow write speed
Answer: B. Data mirroring for fault tolerance
Which RAID level combines both striping and mirroring?A. RAID 0
B. RAID 1
C. RAID 5
D. RAID 10
Answer: D. RAID 10
What is the primary benefit of RAID 5?A. Data mirroring
B. Data striping with parity for fault tolerance
C. Highest read speed
D. Lowest cost
Answer: B. Data striping with parity for fault tolerance
In RAID 6, how many disks can fail without losing data?A. One
B. Two
C. Three
D. Four
Answer: B. Two
Which RAID level offers the best performance but no fault tolerance?A. RAID 0
B. RAID 1
C. RAID 5
D. RAID 6
Answer: A. RAID 0
What is the minimum number of disks required for RAID 5?A. Two
B. Three
C. Four
D. Five
Answer: B. Three
Which RAID level is known for providing high redundancy and high performance by using both striping and parity?A. RAID 0
B. RAID 1
C. RAID 5
D. RAID 10
Answer: C. RAID 5
What type of RAID configuration is best suited for applications requiring high read and write speeds but not redundancy?A. RAID 0
B. RAID 1
C. RAID 5
D. RAID 6
Answer: A. RAID 0
In RAID technology, what does ‘striping’ refer to?A. Storing duplicate copies of data
B. Distributing data across multiple disks to improve performance
C. Calculating parity for error checking
D. Encrypting data on the disks
Answer: B. Distributing data across multiple disks to improve performance
Which RAID level requires at least four disks and uses double parity for extra fault tolerance?A. RAID 0
B. RAID 1
C. RAID 5
D. RAID 6
Answer: D. RAID 6
What is a disadvantage of RAID 10 compared to RAID 5?A. Slower read speed
B. Higher cost due to more disks required
C. Less fault tolerance
D. More complex to implement
Answer: B. Higher cost due to more disks required
Which RAID level provides fault tolerance by duplicating the same data on two disks?A. RAID 0
B. RAID 1
C. RAID 5
D. RAID 10
Answer: B. RAID 1
In a RAID array, what is the purpose of the parity bit?A. To encrypt data
B. To improve read/write speed
C. To check for data integrity and provide fault tolerance
D. To reduce storage space
Answer: C. To check for data integrity and provide fault tolerance
