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Pure Storage Data Storage Associate (DSA) Certification EXAM
QUESTIONS AND CORRECT VERIFIED SOLUTIONS LATEST
UPDATE THIS YEAR – JUST RELEASED
Pure Storage Data Storage Associate (DSA) Certification Exam: 250 MCQ Questions with
Rationales
Exam Coverage Overview (10 Key Points)
1. Exam Overview & Structure – 60 scored multiple-choice questions + ~20 unscored, 120-
minute time limit, $200 USD, 3-year validity, proctored online exam
2. Storage Fundamentals (20-25%) – HDD vs. SSD vs. NVMe technologies; RAID levels
(0,1,5,6,10,50); erasure coding; data reduction (inline deduplication, compression, 10:1
max ratio)
3. Storage Types – Block storage (SAN, iSCSI, FC) vs. File storage (NAS, NFS, SMB) vs. Object
storage (S3); thin vs. thick provisioning; snapshots (Copy-on-Write)
4. Pure Storage Platform (20-25%) – FlashArray architecture (DirectFlash modules,
stateless active/active controllers); FlashBlade (scale-out file and object); Purity OS;
Evergreen architecture (non-disruptive upgrades)
5. Networking Fundamentals (10-15%) – OSI model layers; TCP vs. UDP; switches, routers,
VLANs; iSCSI components (IQN, CHAP authentication, LUN masking)
6. Virtualization & Cloud (10-15%) – Type 1 vs. Type 2 hypervisors; virtual machines and
VMDK files; containers (Docker, Kubernetes) and CSI; cloud service models (IaaS, PaaS,
SaaS)
7. Data Protection (10-15%) – Backup types (full, incremental, differential); encryption at-
rest and in-flight; immutable backups (SafeMode snapshots); synchronous vs.
asynchronous replication
8. Hosts & Protocols (5-10%) – Host components (CPU, RAM, HBA, NIC); multipathing
(MPIO); Fibre Channel (WWN zoning); NVMe-oF (NQN)
9. Data Center Operations (5-10%) – Monitoring (SNMP, Syslog); capacity planning; Power
Usage Effectiveness (PUE); Pure1 AIOps management
10. Recertification – 3-year validity; auto-renewed by earning Professional/Specialist/Expert
certification; Continuing Education credits alternative
250 Multiple Choice Questions with Rationales
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Questions 1-50: Storage Fundamentals
1. An IT administrator needs to select a storage protocol for a virtualized environment that
offers block-level access over an IP network. Which protocol is the correct choice?
A) NFS
B) SMB
C) iSCSI
D) FTP
Correct Answer: C
Rationale: iSCSI is a block-level storage protocol that operates over standard IP networks,
carrying SCSI commands over TCP/IP. This allows hosts to access storage devices as if they were
locally attached. NFS and SMB are file-level protocols used for NAS environments, while FTP is a
file transfer protocol not designed for storage access .
2. Which RAID level combines disk striping with distributed parity, allowing a single drive to
fail without data loss?
A) RAID 0
B) RAID 1
C) RAID 5
D) RAID 10
Correct Answer: C
Rationale: RAID 5 stripes data across multiple drives with distributed parity information,
enabling the array to sustain a single drive failure while maintaining data availability. RAID 0
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provides striping but no redundancy; RAID 1 is mirroring (requires 2 drives); RAID 10 is a stripe
of mirrors (requires 4 drives minimum) .
3. What is the minimum number of drives required for a RAID 5 array?
A) 1
B) 2
C) 3
D) 4
Correct Answer: C
Rationale: RAID 5 requires a minimum of 3 drives. One drive's worth of capacity is used for
parity across all drives, providing fault tolerance. With fewer than 3 drives, the parity
information cannot be distributed effectively to protect against a single drive failure .
4. Which RAID level provides the highest fault tolerance, allowing up to two drive failures?
A) RAID 5
B) RAID 6
C) RAID 10
D) RAID 0
Correct Answer: B
Rationale: RAID 6 uses double parity, allowing the array to sustain the failure of two drives
simultaneously. This provides greater fault tolerance than RAID 5 (single drive failure) and is
used in environments where data protection is critical and rebuild times are a concern .
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5. What best describes the primary advantage of flash storage over hard disk drives?
A) Lower cost per gigabyte
B) Higher capacity
C) Faster access speed and lower latency
D) Longer lifespan
Correct Answer: C
Rationale: Flash storage (SSD) provides significantly faster access speeds and lower latency than
traditional hard disk drives because it has no moving parts. HDDs remain more cost-effective for
bulk storage, while flash excels in performance-sensitive applications requiring high IOPS .
6. What is SSD Write Amplification?
A) The process of writing data multiple times to ensure integrity
B) Duplicate writes on flash memory that reduce performance and lifespan
C) The compression of data before writing to reduce space
D) The encryption of data during write operations
Correct Answer: B
Rationale: Write amplification occurs when the actual amount of data written to flash storage
exceeds the amount of data the host intends to write. This happens because flash memory must
be erased in blocks before rewriting, causing additional write operations that reduce
performance and shorten the drive's lifespan .
7. Which storage type divides data into fixed-size blocks with unique identifiers, providing
high performance for database workloads?
Pure Storage Data Storage Associate (DSA) Certification EXAM
QUESTIONS AND CORRECT VERIFIED SOLUTIONS LATEST
UPDATE THIS YEAR – JUST RELEASED
Pure Storage Data Storage Associate (DSA) Certification Exam: 250 MCQ Questions with
Rationales
Exam Coverage Overview (10 Key Points)
1. Exam Overview & Structure – 60 scored multiple-choice questions + ~20 unscored, 120-
minute time limit, $200 USD, 3-year validity, proctored online exam
2. Storage Fundamentals (20-25%) – HDD vs. SSD vs. NVMe technologies; RAID levels
(0,1,5,6,10,50); erasure coding; data reduction (inline deduplication, compression, 10:1
max ratio)
3. Storage Types – Block storage (SAN, iSCSI, FC) vs. File storage (NAS, NFS, SMB) vs. Object
storage (S3); thin vs. thick provisioning; snapshots (Copy-on-Write)
4. Pure Storage Platform (20-25%) – FlashArray architecture (DirectFlash modules,
stateless active/active controllers); FlashBlade (scale-out file and object); Purity OS;
Evergreen architecture (non-disruptive upgrades)
5. Networking Fundamentals (10-15%) – OSI model layers; TCP vs. UDP; switches, routers,
VLANs; iSCSI components (IQN, CHAP authentication, LUN masking)
6. Virtualization & Cloud (10-15%) – Type 1 vs. Type 2 hypervisors; virtual machines and
VMDK files; containers (Docker, Kubernetes) and CSI; cloud service models (IaaS, PaaS,
SaaS)
7. Data Protection (10-15%) – Backup types (full, incremental, differential); encryption at-
rest and in-flight; immutable backups (SafeMode snapshots); synchronous vs.
asynchronous replication
8. Hosts & Protocols (5-10%) – Host components (CPU, RAM, HBA, NIC); multipathing
(MPIO); Fibre Channel (WWN zoning); NVMe-oF (NQN)
9. Data Center Operations (5-10%) – Monitoring (SNMP, Syslog); capacity planning; Power
Usage Effectiveness (PUE); Pure1 AIOps management
10. Recertification – 3-year validity; auto-renewed by earning Professional/Specialist/Expert
certification; Continuing Education credits alternative
250 Multiple Choice Questions with Rationales
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Questions 1-50: Storage Fundamentals
1. An IT administrator needs to select a storage protocol for a virtualized environment that
offers block-level access over an IP network. Which protocol is the correct choice?
A) NFS
B) SMB
C) iSCSI
D) FTP
Correct Answer: C
Rationale: iSCSI is a block-level storage protocol that operates over standard IP networks,
carrying SCSI commands over TCP/IP. This allows hosts to access storage devices as if they were
locally attached. NFS and SMB are file-level protocols used for NAS environments, while FTP is a
file transfer protocol not designed for storage access .
2. Which RAID level combines disk striping with distributed parity, allowing a single drive to
fail without data loss?
A) RAID 0
B) RAID 1
C) RAID 5
D) RAID 10
Correct Answer: C
Rationale: RAID 5 stripes data across multiple drives with distributed parity information,
enabling the array to sustain a single drive failure while maintaining data availability. RAID 0
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provides striping but no redundancy; RAID 1 is mirroring (requires 2 drives); RAID 10 is a stripe
of mirrors (requires 4 drives minimum) .
3. What is the minimum number of drives required for a RAID 5 array?
A) 1
B) 2
C) 3
D) 4
Correct Answer: C
Rationale: RAID 5 requires a minimum of 3 drives. One drive's worth of capacity is used for
parity across all drives, providing fault tolerance. With fewer than 3 drives, the parity
information cannot be distributed effectively to protect against a single drive failure .
4. Which RAID level provides the highest fault tolerance, allowing up to two drive failures?
A) RAID 5
B) RAID 6
C) RAID 10
D) RAID 0
Correct Answer: B
Rationale: RAID 6 uses double parity, allowing the array to sustain the failure of two drives
simultaneously. This provides greater fault tolerance than RAID 5 (single drive failure) and is
used in environments where data protection is critical and rebuild times are a concern .
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5. What best describes the primary advantage of flash storage over hard disk drives?
A) Lower cost per gigabyte
B) Higher capacity
C) Faster access speed and lower latency
D) Longer lifespan
Correct Answer: C
Rationale: Flash storage (SSD) provides significantly faster access speeds and lower latency than
traditional hard disk drives because it has no moving parts. HDDs remain more cost-effective for
bulk storage, while flash excels in performance-sensitive applications requiring high IOPS .
6. What is SSD Write Amplification?
A) The process of writing data multiple times to ensure integrity
B) Duplicate writes on flash memory that reduce performance and lifespan
C) The compression of data before writing to reduce space
D) The encryption of data during write operations
Correct Answer: B
Rationale: Write amplification occurs when the actual amount of data written to flash storage
exceeds the amount of data the host intends to write. This happens because flash memory must
be erased in blocks before rewriting, causing additional write operations that reduce
performance and shorten the drive's lifespan .
7. Which storage type divides data into fixed-size blocks with unique identifiers, providing
high performance for database workloads?
