Ace Supermicro SDLCSA Certification with Actual Questions Jan 05, 2026 Updated
2026 The Most Effective SDLCSA with 42 Questions Answers
NEW QUESTION # 11
What are the full steps and proper order for removing the LPIO board from the PCIe tray?
- A. Remove PCIe air shroud > Remove all AOC NIC cards > Remove metal bracket holding down LPIO board
- B. Remove GPU > Remove metal bracket holding down LPIO board > Remove 3 or 4 AOC NIC cards
- C. Remove metal bracket holding down LPIO board > Remove PCIe air shroud > Remove internal fans
- D. Remove a few AOC NIC cards > Remove PCIe tray > Remove motherboard tray
Answer: A
Explanation:
Removing the LPIO (Low-Profile IO) board from the PCIe tray in the SYS-421GE-TNHR2-LCCinvolves:
* Remove PCIe air shroud: Clears access to components (standard in Supermicro designs).
* Remove all AOC NIC cards: Disconnects cards on the LPIO board for unobstructed removal.
* Remove metal bracket holding down LPIO board: Unscrews (typically 2 screws) the bracket securing the board.Option B follows Supermicro's logical service order (e.g., SYS-420GP-TNAR), ensuring safe access in DLC systems. A (GPU) is unrelated, C (tray removals) is excessive, and D (fans) is irrelevant. B aligns with Supermicro's DLC modularity, making it correct.References:
Supermicro PCIe tray service guides, DLC system IO removal protocols.
NEW QUESTION # 12
What are the full steps and proper order for removing the motherboard tray from the chassis of the SYS-
421GE-TNHR2-LCC system?
- A. Loosen 2 screws on both ends of the front of the chassis to loosen the latches > Pull down on the latches until the latches release completely > Slowly start pulling the tray out > Release the safety latches on both sides > Lift and move the quick connect cables out of the way > Continue pulling out the tray the rest of the way
- B. Loosen 8 screws on both ends of the front of the chassis to loosen the latches > Continue pulling out the tray the rest of the way
- C. Loosen 12 screws on both ends of the front of the chassis to loosen the latches > Slowly start pulling the tray out > Continue pulling out the tray the rest of the way
- D. Pull down on the latches until the latches release completely > Slowly start pulling the tray out > Release the safety latches on both sides
Answer: A
Explanation:
Removing the motherboard tray from the SYS-421GE-TNHR2-LCC involves:
* Loosen 2 screws on both ends of the front of the chassis: Secures latches, per Supermicro's design (e.
g., SYS-420GP-TNAR).
* Pull down on the latches until they release completely: Frees the tray.
* Slowly start pulling the tray out: Initiates removal.
* Release the safety latches on both sides: Prevents dropping (DLC safety feature).
* Lift and move the quick connect cables: Clears DLC coolant or power lines.
* Continue pulling out the tray: Completes removal.Option D is the most comprehensive, matching Supermicro's DLC system protocols. A skips screws and cables, B (12 screws) and C (8 screws) exaggerate screw count, lacking safety steps. D ensures safe, complete removal.References:Supermicro motherboard tray removal guides, DLC system safety features.
NEW QUESTION # 13
Which 3 components of the SYS-421GE-TNHR2-LCC does this training discuss break/fix for? (Choose 3 answers)
- A. Bluetooth
- B. PCIe Tray
- C. Motherboard Tray
- D. External Chassis
Answer: B,C,D
Explanation:
The SYS-421GE-TNHR2-LCC, a DLC-enabled server, focuses break/fix training on key physical components per Supermicro's service scope:
* PCIe Tray: Houses GPUs/NICs, critical for DLC cooling (e.g., cold plates on GPUs).
* Motherboard Tray: Contains CPUs and core systems, also liquid-cooled in DLC setups.
* External Chassis: Encloses all components, requiring access for repairs.Bluetooth (C) is a connectivity feature, not a physical component for break/fix in this context, and Supermicro's DLC documentation (e.g., rack-scale solutions) emphasizes trays and chassis. Thus, A, B, and D are the focus.References:
Supermicro DLC solution breakdowns, SYS-420 series service guides.
NEW QUESTION # 14
How do you access the M.2 drive in the chassis?
- A. The M.2 drive is not accessible at all
- B. By removing the GPU tray from the chassis, then removing the air shroud from the GPU tray
- C. By removing the motherboard tray from the chassis, then removing the air shroud from the motherboard tray
- D. By removing the fan housing from the chassis, then removing the air shroud from the fan housing
Answer: C
Explanation:
In Supermicro systems like the SYS-421GE-TNHR2-LCC, M.2 drives are typically mounted on the motherboard for fast storage in high-performance computing (HPC) and AI workloads, often cooled indirectly by DLC systems. To access the M.2 drive, you must:
Remove the motherboard tray from the chassis: This exposes the motherboard where M.2 slots reside.
Remove the air shroud from the motherboard tray: The shroud covers components for airflow or hybrid cooling, and its removal provides access to the M.2 slot.
Option D aligns with Supermicro's design, as seen in manuals (e.g., SYS-420GP-TNAR), where M.2 drives are motherboard-mounted. A is incorrect since M.2 drives are serviceable; B (GPU tray) and C (fan housing) don't house M.2 drives in this context. Supermicro's DLC solutions prioritize motherboard accessibility, making D the correct procedure.
References: Supermicro motherboard tray manuals, DLC system component layouts.
NEW QUESTION # 15
In order to remove the AOM cage, best describe the location of the 4 screws that need to be removed.
- A. 3 screws on the side, 1 screw on the top
- B. 2 screws on the top, 2 screws on the side
- C. 3 screws on the top, 1 screw on the side
- D. 4 screws on the top, 0 screws on the side
Answer: B
Explanation:
The AOM (Add-On Module) cage in the SYS-421GE-TNHR2-LCC is secured with2 screws on the top and
2 on the side, a balanced approach in Supermicro's modular designs (e.g., SYS-420GP-TNAR). This ensures stability and accessibility in DLC systems. A and B skew placement, while C (all top) ignores side support. D matches Supermicro's chassis engineering, making it correct.References:Supermicro AOM cage specs, DLC system structural design.
NEW QUESTION # 16
When removing the PCIe tray, where are the screws located and how many screws need to be loosened?
- A. There are 2 screws that need to be loosened, one on each side on the sides of the GPU tray
- B. There are 2 screws that need to be loosened, one on each side of the front of the PCIe tray
- C. There are 4 screws that need to be loosened, two on each side of the front of the PCIe tray
- D. There are 6 screws that need to be loosened, three on each side on the front of the PCIe tray
Answer: C
Explanation:
Removing the PCIe tray in the SYS-421GE-TNHR2-LCC requires loosening4 screws, two on each side of the front, per Supermicro's standard tray removal (e.g., SYS-420GP-TNAR). This ensures secure detachment of the heavy, DLC-integrated tray. B (6 screws) is excessive, C misplaces screws to a GPU tray's sides, and D (2 screws) under-secures. Supermicro's DLC systems balance stability and serviceability, making A correct.
References:Supermicro PCIe tray removal guides, DLC system tray specs.
NEW QUESTION # 17
What is the color of the PCIe tray's air shroud?
- A. Clear
- B. White
- C. Opaque
- D. Black
Answer: D
Explanation:
The air shroud in Supermicro systems, including those with Direct Liquid Cooling (DLC) solutions like the SYS-421GE-TNHR2-LCC, is typically designed to direct airflow (or in hybrid systems, assist with liquid cooling efficiency) and is made of plastic or composite materials. Based on Supermicro's standard design practices seen in technical documentation and product images (e.g., SYS-420GP-TNAR, a similar GPU server with DLC), the PCIe tray's air shroud is consistently black. This color aids in heat absorption and dissipation, aligning with Supermicro's focus on thermal efficiency in DLC systems, where cold plates and coolant distribution units (CDUs) manage heat directly at the chip level. White or clear shrouds are less common due to aesthetic and thermal considerations, and "opaque" is not a specific color designation. Thus, black is the correct choice, reflecting Supermicro's engineering standards for high-performance computing components.
References:Supermicro product images and manuals (e.g., SYS-420GP-TNAR User Manual), general DLC solution descriptions.
NEW QUESTION # 18
The power supply units (PSUs) in the SYS-421GE-TNHR2-LCC system are at the back of the chassis, and next to a dummy PSU tray. True or False.
- A. False
- B. True
Answer: B
Explanation:
In Supermicro's high-end servers like the SYS-421GE-TNHR2-LCC, PSUs are typically located at the back of the chassis for accessibility and cooling efficiency, a design consistent with DLC rack-scale solutions (e.g., SYS-420GP-TNAR). The mention of a "dummy PSU tray" suggests a placeholder or empty slot, common in modular designs to maintain airflow or allow future expansion. This layout is standard in Supermicro's DLC systems, where PSUs power both compute and cooling components (e.g., pumps, CDUs). No contradicting evidence exists, and True (A) aligns with Supermicro's chassis architecture, making it the correct answer.
References: Supermicro chassis design specs, DLC system PSU placement.
NEW QUESTION # 19
What safety feature prevents the motherboard tray from being removed too quickly and potentially dropped?
- A. A safety pin
- B. A safety cable
- C. A safety latch
- D. A safety switch
Answer: C
Explanation:
In Supermicro servers like the SYS-421GE-TNHR2-LCC, the motherboard tray is a critical component, often heavy with CPUs and DLC cold plates. A safety latch is the standard feature to prevent rapid removal and accidental drops, as seen in manuals (e.g., SYS-420GP-TNAR). Latches on both sides must be released deliberately, ensuring controlled extraction. A cable (A) might tether but not prevent speed, a switch (B) controls electronics, and a pin (D) is less common for trays. Supermicro's DLC systems prioritize safe handling, making C the correct safety mechanism.
References: Supermicro motherboard tray removal guides, DLC system safety features.
NEW QUESTION # 20
Which statement accurately describes the location of the motherboard tray in the chassis of the SYS-421GE- TNHR2-LCC system?
- A. Above the GPU tray
- B. Below the GPU tray
- C. Below the PCIe tray
- D. Above the PCIe tray
Answer: C
Explanation:
In Supermicro's SYS-421GE-TNHR2-LCC, the motherboard tray isbelow the PCIe tray, consistent with high-end server designs (e.g., SYS-420GP-TNAR). The motherboard tray houses CPUs and core components, while the PCIe tray (often with GPUs) sits above, connected via risers or direct slots. Options C and D reference a "GPU tray," likely a misnomer for the PCIe tray, but B remains accurate. Supermicro's DLC systems stack trays vertically for cooling efficiency, confirming B as correct.References:Supermicro chassis layout specs, DLC system tray configurations.
NEW QUESTION # 21
Before removing the LPIO board from the PCIe tray, what other component needs to be removed first?
- A. Motherboard tray
- B. GPU tray
- C. Air shroud
- D. Metal bracket
Answer: D
Explanation:
The LPIO (Low-Profile IO) board in Supermicro systems like the SYS-421GE-TNHR2-LCC, part of the PCIe tray, is typically secured by ametal bracketthat must be removed first. This bracket holds the LPIO board and associated cables (e.g., BMC cable) in place, as seen in similar designs (e.g., SYS-420GP-TNAR). Removing it involves unscrewing (often 2 screws) and lifting it off, granting access to the LPIO board. A (GPU tray) is a separate assembly, C (motherboard tray) is unrelated to the PCIe tray's LPIO, and D (air shroud) covers components but doesn't secure the board. Supermicro's DLC systems emphasize modular access, making B the correct step.References:Supermicro PCIe tray service guides, DLC system IO component layouts.
NEW QUESTION # 22
In the video, how many AOC NIC cards are located on the LPIO board?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: C
NEW QUESTION # 23
Aside from ESD gloves, what additional tools do you need to remove a DIMM?
- A. No additional tools are needed
- B. Screwdriver
- C. Torque bit and driver
- D. Long-nose pliers (in order to grasp the card)
Answer: A
Explanation:
Removing a DIMM (memory module) in Supermicro systems like the SYS-421GE-TNHR2-LCC requires only ESD gloves for safety;no additional toolsare needed. DIMMs are released by pushing down on slot latches and lifting out by hand, per Supermicro manuals (e.g., SYS-420GP-TNAR). A (pliers) risks damage, B (torque bit) and D (screwdriver) are for screws, not DIMMs. Supermicro's DLC systems maintain standard DIMM serviceability, making C correct.References:Supermicro DIMM replacement guides, DLC system maintenance standards.
NEW QUESTION # 24
What are the three main benefits of Liquid Cooling? (Choose 3 answers)
- A. Liquid is significantly better at removing heat than air
- B. Liquid molecules are closer together and result in a higher heat transfer
- C. Liquid is cheaper to implement
- D. Liquid is 25 times better at transferring heat
Answer: A,B,D
Explanation:
Supermicro's DLC solutions highlight:
* A: Liquid removes heat more effectively than air, a core advantage (e.g., 40% OPEX reduction).
* B: Closer liquid molecules enhance heat transfer, a physical principle in DLC.
* D: Liquid is ~25 times better at heat transfer than air, per Supermicro's technical claims.C (cheaper) is false-DLC has higher initial costs but saves long-term. A, B, D are the verified benefits.References:
Supermicro DLC whitepapers, heat transfer specs.
NEW QUESTION # 25
Where is the screw located that releases the AOC card from the bracket?
- A. On the AOC card itself
- B. There is no screw that you need to remove
- C. On the metal bar, on the top of the bracket
- D. On the metal bar, on the top of the AOM card
Answer: C
Explanation:
In Supermicro systems, an AOC (Add-On Card), such as a NIC or GPU card, is typically secured to a bracket for stability within the PCIe tray or chassis. Based on Supermicro's hardware design for systems like the SYS-
421GE-TNHR2-LCC (a DLC-capable server), the AOC card is fastened to a metal bracket via a screw located on the metal bar at the top of the bracket. This aligns with standard PCIe card installation practices, where the bracket interfaces with the chassis, and a single screw on the bar secures it. Option A references an "AOM card" (likely a typo for AOC), but the screw isn't on the card itself. Option C is incorrect as the card doesn't self-secure, and D is false since a screw is standard. Supermicro's DLC solutions maintain traditional card mounting for compatibility, making B the correct location.References:Supermicro PCIe card installation guides, SYS-420 series documentation.
NEW QUESTION # 26
What are the full steps and proper order for removing the fan board from the motherboard tray?
- A. Disconnect the power supply from all the fans > Pull the fan board straight up and out of the tray
- B. Pull up on the blue levers on each side of the fan board to unlock it > Pull the fan board straight up and out of the tray
- C. Pull the fan board straight up and out of the tray
- D. Disconnect the power supply from all the fans > Pull up on the blue levers on each side of the fan board to unlock it > Pull the fan board straight up and out of the tray
Answer: D
Explanation:
The fan board in Supermicro systems, including the SYS-421GE-TNHR2-LCC with DLC, manages cooling (even in hybrid air/liquid setups). The removal process, per Supermicro's service manuals, involves:
* Disconnect the power supply from all the fans: This ensures safety and prevents damage, a critical step in DLC systems where fans may supplement liquid cooling.
* Pull up on the blue levers on each side of the fan board to unlock it: Blue levers are a common Supermicro design feature for releasing components securely.
* Pull the fan board straight up and out of the tray: Once unlocked, the board is lifted free.Option B includes all necessary steps. A skips disconnection and unlocking, C omits the levers, and D misses power disconnection, risking damage. Supermicro's DLC solutionsemphasize safe maintenance, supporting B as the correct procedure.References:Supermicro motherboard tray service guides, DLC system maintenance protocols.
NEW QUESTION # 27
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