Please keep at least one language enabled. || కనీసం ఒక భాషను ఎంచుకోండి.
Question 1
ప్రశ్న 1
Which statement best describes the fundamental purpose of RAID in a computer storage system?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• RAID stands for Redundant Array of Independent Disks and combines multiple drives into a logical storage arrangement.
• Different RAID levels emphasize performance, redundancy or a combination of both.
• RAID does not alter CPU clock speed or convert volatile memory into non-volatile memory.
• Different RAID levels emphasize performance, redundancy or a combination of both.
• RAID does not alter CPU clock speed or convert volatile memory into non-volatile memory.
వివరణ:
Question 2
ప్రశ్న 2
Which RAID technique divides data into blocks and distributes those blocks across multiple drives to improve storage performance?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• Striping distributes portions of data across multiple disks.
• Multiple drives can then participate in storage operations, which can improve throughput.
• RAID 0 is the basic RAID level associated with striping without redundancy.
• Multiple drives can then participate in storage operations, which can improve throughput.
• RAID 0 is the basic RAID level associated with striping without redundancy.
వివరణ:
Question 3
ప్రశ్న 3
Which RAID technique writes duplicate copies of the same data to separate drives?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• Mirroring stores duplicate copies of data on separate drives.
• If one mirrored drive fails, the surviving copy can normally continue to provide the stored information.
• RAID 1 is the basic RAID level based on mirroring.
• If one mirrored drive fails, the surviving copy can normally continue to provide the stored information.
• RAID 1 is the basic RAID level based on mirroring.
వివరణ:
Question 4
ప్రశ్న 4
Which statement about RAID 0 is correct?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• RAID 0 distributes data across multiple drives using striping.
• Because it stores no redundant copy or parity information, failure of one member can make the array's data unusable.
• Its principal advantages are usable capacity and potential performance rather than fault tolerance.
• Because it stores no redundant copy or parity information, failure of one member can make the array's data unusable.
• Its principal advantages are usable capacity and potential performance rather than fault tolerance.
వివరణ:
Question 5
ప్రశ్న 5
Which statement about a basic two-disk RAID 1 array is most accurate?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• RAID 1 mirrors data, so each member of a basic two-disk mirror contains a copy of the stored information.
• If either one of the two drives fails, the remaining drive can normally continue to provide the data.
• The redundancy reduces usable capacity compared with RAID 0.
• If either one of the two drives fails, the remaining drive can normally continue to provide the data.
• The redundancy reduces usable capacity compared with RAID 0.
వివరణ:
Question 6
ప్రశ్న 6
Two identical 1 TB drives are configured as RAID 0. Ignoring formatting and metadata overhead, what is the approximate usable capacity?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• RAID 0 combines the usable capacities of its member drives because no capacity is reserved for mirroring or parity.
• Two 1 TB drives therefore provide approximately 1 TB + 1 TB = 2 TB.
• This increased usable capacity comes without protection against failure of either member.
• Two 1 TB drives therefore provide approximately 1 TB + 1 TB = 2 TB.
• This increased usable capacity comes without protection against failure of either member.
వివరణ:
Question 7
ప్రశ్న 7
Two identical 2 TB drives are configured as RAID 1. Ignoring formatting and metadata overhead, what is the approximate usable capacity?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• In a two-disk RAID 1 mirror, the second drive stores a duplicate of the first drive's data.
• Therefore two 2 TB drives provide approximately 2 TB of usable mirrored storage.
• The remaining raw capacity is effectively used to maintain the redundant copy.
• Therefore two 2 TB drives provide approximately 2 TB of usable mirrored storage.
• The remaining raw capacity is effectively used to maintain the redundant copy.
వివరణ:
Question 8
ప్రశ్న 8
Which RAID level among the following provides the highest usable capacity when two equal-sized drives are used, but provides no redundancy?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• RAID 0 uses the combined capacity of both drives because it stores no duplicate copy.
• RAID 1 uses approximately the capacity of one drive because the second member mirrors the data.
• The trade-off is that RAID 0 provides no fault tolerance against a member-drive failure.
• RAID 1 uses approximately the capacity of one drive because the second member mirrors the data.
• The trade-off is that RAID 0 provides no fault tolerance against a member-drive failure.
వివరణ:
Question 9
ప్రశ్న 9
A two-disk RAID 1 array contains two healthy drives. One drive fails completely. What is the expected result?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• RAID 1 stores duplicate data on its mirrored members.
• Failure of one drive therefore normally leaves another complete copy available.
• The array is degraded because redundancy has been lost until the failed member is replaced and the mirror is rebuilt.
• Failure of one drive therefore normally leaves another complete copy available.
• The array is degraded because redundancy has been lost until the failed member is replaced and the mirror is rebuilt.
వివరణ:
Question 10
ప్రశ్న 10
A two-disk RAID 0 array contains important data. One member drive fails completely. Which statement is most accurate?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• RAID 0 divides data across its member disks rather than maintaining a duplicate copy.
• A failed member removes part of the striped data required to reconstruct files.
• RAID 0 should therefore not be selected when protection against a single-drive failure is required.
• A failed member removes part of the striped data required to reconstruct files.
• RAID 0 should therefore not be selected when protection against a single-drive failure is required.
వివరణ:
Question 11
ప్రశ్న 11
Consider the following statements:
1. RAID 0 uses striping.
2. RAID 1 uses mirroring.
3. RAID 0 provides fault tolerance against the failure of one member drive.
4. RAID 1 sacrifices usable capacity to maintain redundancy.
Which statements are correct?
1. RAID 0 uses striping.
2. RAID 1 uses mirroring.
3. RAID 0 provides fault tolerance against the failure of one member drive.
4. RAID 1 sacrifices usable capacity to maintain redundancy.
Which statements are correct?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• RAID 0 uses striping, while RAID 1 uses mirroring.
• RAID 1 uses additional raw storage to maintain redundant copies, reducing usable capacity.
• RAID 0 has no redundancy, so Statement 3 is incorrect.
• RAID 1 uses additional raw storage to maintain redundant copies, reducing usable capacity.
• RAID 0 has no redundancy, so Statement 3 is incorrect.
వివరణ:
Question 12
ప్రశ్న 12
A user has two 4 TB drives and requires protection against failure of either one drive rather than maximum usable capacity. Which configuration is the better choice?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• RAID 1 mirrors the contents across two drives and can normally survive failure of one member.
• RAID 0 emphasizes capacity and performance but does not protect against a member-drive failure.
• The stated requirement prioritizes redundancy, making RAID 1 the appropriate choice.
• RAID 0 emphasizes capacity and performance but does not protect against a member-drive failure.
• The stated requirement prioritizes redundancy, making RAID 1 the appropriate choice.
వివరణ:
Question 13
ప్రశ్న 13
Four identical 500 GB drives are configured as RAID 0. Ignoring overhead, what is the approximate usable capacity?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• RAID 0 combines the usable capacity of all participating equal-sized disks.
• 4 × 500 GB = 2000 GB, which is approximately 2 TB using decimal manufacturer-style capacity units.
• No disk capacity is reserved for mirroring or parity in RAID 0.
• 4 × 500 GB = 2000 GB, which is approximately 2 TB using decimal manufacturer-style capacity units.
• No disk capacity is reserved for mirroring or parity in RAID 0.
వివరణ:
Question 14
ప్రశ్న 14
A basic RAID 1 mirror uses one 1 TB drive and one 2 TB drive. Assuming the controller permits this combination, approximately how much capacity can normally be mirrored using both drives?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• A mirror can duplicate only as much data as can fit on every participating mirrored member.
• The smaller 1 TB drive therefore limits the common mirrored capacity to approximately 1 TB.
• The additional capacity on the larger drive is not part of that basic equal mirror unless separately configured.
• The smaller 1 TB drive therefore limits the common mirrored capacity to approximately 1 TB.
• The additional capacity on the larger drive is not part of that basic equal mirror unless separately configured.
వివరణ:
Question 15
ప్రశ్న 15
Which statement best describes the relationship between RAID and data backup?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• RAID redundancy protects primarily against particular hardware-drive failures depending on the RAID level.
• It does not provide an independent historical copy when data is deleted, corrupted or encrypted by malware.
• Important information should therefore still be protected by an appropriate backup strategy.
• It does not provide an independent historical copy when data is deleted, corrupted or encrypted by malware.
• Important information should therefore still be protected by an appropriate backup strategy.
వివరణ:
Question 16
ప్రశ్న 16
Match List I with List II:
List I
(a) RAID 0
(b) RAID 1
(c) Striping
(d) Mirroring
List II
1. Duplicate copies of data
2. Distributes data blocks across disks
3. Basic RAID level providing redundancy through duplicate storage
4. Basic RAID level emphasizing performance/capacity without redundancy
Choose the correct matching code.
List I
(a) RAID 0
(b) RAID 1
(c) Striping
(d) Mirroring
List II
1. Duplicate copies of data
2. Distributes data blocks across disks
3. Basic RAID level providing redundancy through duplicate storage
4. Basic RAID level emphasizing performance/capacity without redundancy
Choose the correct matching code.
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• RAID 0 is the basic striped RAID level without redundancy, giving (a)-4.
• RAID 1 provides redundancy through mirroring, giving (b)-3.
• Striping distributes data blocks, while mirroring creates duplicate copies, giving (c)-2 and (d)-1.
• RAID 1 provides redundancy through mirroring, giving (b)-3.
• Striping distributes data blocks, while mirroring creates duplicate copies, giving (c)-2 and (d)-1.
వివరణ:
Question 17
ప్రశ్న 17
Assertion (A): RAID 1 normally provides less usable capacity than RAID 0 when the same two equal-sized drives are used.
Reason (R): RAID 1 stores redundant copies of the data, whereas RAID 0 uses both drives for striped data without maintaining a mirrored copy.
Choose the correct answer.
Reason (R): RAID 1 stores redundant copies of the data, whereas RAID 0 uses both drives for striped data without maintaining a mirrored copy.
Choose the correct answer.
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• With two equal drives, RAID 1 provides approximately the capacity of one drive because the other maintains the mirrored copy.
• RAID 0 can use approximately the combined capacities of both drives because no redundancy is stored.
• The Reason therefore correctly explains the difference in usable capacity.
• RAID 0 can use approximately the combined capacities of both drives because no redundancy is stored.
• The Reason therefore correctly explains the difference in usable capacity.
వివరణ:
Question 18
ప్రశ్న 18
Three identical 2 TB drives are configured as RAID 0. Ignoring overhead, what is the approximate usable capacity?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• RAID 0 usable capacity is approximately the sum of the capacities of all equal-sized participating drives.
• 3 × 2 TB = 6 TB.
• The full combined capacity is usable because RAID 0 stores neither mirrored copies nor parity.
• 3 × 2 TB = 6 TB.
• The full combined capacity is usable because RAID 0 stores neither mirrored copies nor parity.
వివరణ:
Question 19
ప్రశ్న 19
Which of the following situations most directly demonstrates the redundancy advantage of RAID 1?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• The key feature of RAID 1 is that the same information is stored on mirrored members.
• If one drive fails, the surviving member can normally continue serving the data.
• This redundancy is the principal fault-tolerance advantage of RAID 1.
• If one drive fails, the surviving member can normally continue serving the data.
• This redundancy is the principal fault-tolerance advantage of RAID 1.
వివరణ:
Question 20
ప్రశ్న 20
A system administrator has two identical 3 TB drives. Which pairing of RAID level and approximate usable capacity is correct, ignoring overhead?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• RAID 0 combines both 3 TB drives, giving approximately 6 TB of usable capacity.
• RAID 1 mirrors one 3 TB data set onto the other drive, giving approximately 3 TB usable capacity.
• The difference reflects RAID 0's emphasis on capacity/performance versus RAID 1's emphasis on redundancy.
• RAID 1 mirrors one 3 TB data set onto the other drive, giving approximately 3 TB usable capacity.
• The difference reflects RAID 0's emphasis on capacity/performance versus RAID 1's emphasis on redundancy.
వివరణ:
Answer Key సమాధానాల పట్టిక
-
Question 1 ప్రశ్న 1Answer: C. To combine multiple physical drives into a storage arrangement for performance, redundancy, or both, depending on the RAID level సమాధానం: C.
-
Question 2 ప్రశ్న 2Answer: A. Striping సమాధానం: A.
-
Question 3 ప్రశ్న 3Answer: D. Mirroring సమాధానం: D.
-
Question 4 ప్రశ్న 4Answer: B. It uses striping and provides no redundancy against drive failure. సమాధానం: B.
-
Question 5 ప్రశ్న 5Answer: C. The same data is mirrored on both disks, providing redundancy against failure of one disk. సమాధానం: C.
-
Question 6 ప్రశ్న 6Answer: B. 2 TB సమాధానం: B.
-
Question 7 ప్రశ్న 7Answer: A. 2 TB సమాధానం: A.
-
Question 8 ప్రశ్న 8Answer: D. RAID 0 సమాధానం: D.
-
Question 9 ప్రశ్న 9Answer: B. The array can normally continue operating in a degraded state using the surviving mirrored drive. సమాధానం: B.
-
Question 10 ప్రశ్న 10Answer: C. Because data is striped without redundancy, failure of one member can make the array's data inaccessible. సమాధానం: C.
-
Question 11 ప్రశ్న 11Answer: A. 1, 2 and 4 only సమాధానం: A.
-
Question 12 ప్రశ్న 12Answer: D. RAID 1 సమాధానం: D.
-
Question 13 ప్రశ్న 13Answer: C. 2 TB సమాధానం: C.
-
Question 14 ప్రశ్న 14Answer: A. 1 TB సమాధానం: A.
-
Question 15 ప్రశ్న 15Answer: D. RAID redundancy can improve availability after certain drive failures, but separate backups are still required for protection against deletion, corruption, malware, theft or other failures. సమాధానం: D.
-
Question 16 ప్రశ్న 16Answer: B. (a)-4, (b)-3, (c)-2, (d)-1 సమాధానం: B.
-
Question 17 ప్రశ్న 17Answer: A. Both A and R are true, and R is the correct explanation of A. సమాధానం: A.
-
Question 18 ప్రశ్న 18Answer: C. 6 TB సమాధానం: C.
-
Question 19 ప్రశ్న 19Answer: D. One mirrored drive fails but the same data remains available from the surviving drive. సమాధానం: D.
-
Question 20 ప్రశ్న 20Answer: B. RAID 0 — 6 TB; RAID 1 — 3 TB సమాధానం: B.