SDLCSA Practice Exam Tests Latest Updated on May-2025
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NEW QUESTION # 14
Which card would you most likely connect to the AOM module (AOM-GP401-PCIE)?
- A. AOC NIC card
- B. AOM card
- C. Debit card
- D. Credit card
Answer: A
Explanation:
The AOM module (AOM-GP401-PCIE) in Supermicro systems is a PCIe-based add-on module, typically for expansion cards like NICs (Network Interface Cards). The AOC NIC card (Add-On Card, Network Interface Card) is the most likely connection, as Supermicro's AOM modules (e.g., in SYS-420 series) are designed to interface with AOC cards for networking in DLC systems. A (AOM card) is vague and not a standard term, while B and D (credit/debit cards) are irrelevant. Supermicro's DLC solutions integrate high-speed networking, making C the verified choice.
References: Supermicro AOM module specs, DLC system networking components.
NEW QUESTION # 15
How do you know when the DIMM has been properly inserted back into the slot?
- A. You should still be able to wiggle the DIMM after you've pressed the DIMM down into the slot
- B. You should hear a click after you've pressed the DIMM down into the slot
- C. You shouldn't hear a click after you've pressed the DIMM down into the slot
- D. You should see a green lit button on the DIMM
Answer: B
Explanation:
When inserting a DIMM in Supermicro systems, proper seating is confirmed by aclickas the slot latches snap into place, securing the module (e.g., SYS-420GP-TNAR manuals). This audible feedback is standard in DLC systems for reliable memory installation. B (green button) isn't a feature, C contradicts correct insertion, and D (wiggling) indicates failure. Supermicro's design ensures firm DIMM placement, making A the verified sign.References:Supermicro DIMM installation guides, DLC system component reliability.
NEW QUESTION # 16
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 # 17
When replacing the air shroud onto the motherboard tray, which 2 screws should be placed back first?
- A. The first 2 screws connecting the air shroud to the fan board
- B. The first 2 screws connecting the air shroud to the motherboard tray
- C. The first 2 screws connecting the air shroud to the fan board
- D. The first 2 screws connecting the air shroud to the PCIe tray
Answer: B
Explanation:
Replacing the air shroud onto the motherboard tray in a Supermicro system involves securing it to the tray itself first for stability. The correct screws are those connecting the shroud directly to the motherboard tray, as outlined in Supermicro's assembly guides (e.g., SYS-420 series). These initial screws align and anchor the shroud, ensuring proper fitment before additional connections (if any). Options B (PCIe tray) and C/D (fan board) are incorrect since the shroud's primary attachment is to the motherboard tray, not other components.
In DLC systems, precise shroud placement enhances cooling efficiency, supporting A as the correct choice.
References:Supermicro motherboard tray assembly guides, DLC system component integration.
NEW QUESTION # 18
What safety feature prevents the motherboard tray from being removed too quickly and potentially dropped?
- A. A safety cable
- B. A safety switch
- C. A safety pin
- D. A safety latch
Answer: D
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 # 19
Where in the chassis are the internal fans and fan housing located?
- A. In the middle of the PCIe tray
- B. In the middle of the motherboard tray
- C. In the back of the motherboard tray
- D. In the back of the PCIe tray
Answer: B
Explanation:
In Supermicro systems like the SYS-421GE-TNHR2-LCC, internal fans and their housing are typically located in themiddle of the motherboard tray, providing airflow across CPUs and memory, even in DLC setups where liquid cooling handles primary heat removal. This placement, seen in similar systems (e.g., SYS-
420GP-TNAR), balances cooling distribution. A and B (PCIe tray) focus on GPU cooling, not motherboard fans, while C (back of motherboard tray) is less common due to PSU placement. Supermicro's DLC hybrid designs integrate fans centrally on the motherboard tray, making D correct.References:Supermicro chassis layouts, DLC hybrid cooling configurations.
NEW QUESTION # 20
What is the role of the pump in the D2C liquid-cooled rack?
- A. It turns the liquid into different colors based on the mood of the server
- B. It provides air to cool the server
- C. It circulates the liquid and is placed directly on the chip to improve flow
- D. It boils the liquid and overheats the server
Answer: C
NEW QUESTION # 21
How many screws need to be removed from the metal bracket that holds down the LPIO board / BMC cable?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: A
Explanation:
The LPIO (Low-Profile IO) board and BMC cable in Supermicro systems are typically secured by a minimal number of screws for quick serviceability, a principle in DLC designs like the SYS-421GE-TNHR2-LCC.
Based on similar systems (e.g., SYS-420GP-TNAR), the metal bracket holding these components is fastened with 2 screws, balancing security and ease of access. Higher counts like 8 (A), 5 (B), or 6 (D) are excessive for a small bracket, while 2 (C) matches Supermicro's standard for IO-related brackets. In DLC contexts, modularity is key, supporting C as the verified number.
References: Supermicro IO board installation guides, DLC system service efficiency.
NEW QUESTION # 22
Which cable needs to be disconnected first, before lifting the fan up and out of the metal housing?
- A. Power cable
- B. I2C cable
- C. PCIe cable
- D. SATA cable
Answer: A
Explanation:
Fans in Supermicro systems, including those with DLC like the SYS-421GE-TNHR2-LCC, are powered by a power cable connecting to the fan board or motherboard. Before removing a fan from its housing, the power cable must be disconnected first to ensure safety and prevent electrical damage, a standard step in Supermicro' s service protocols. PCIe cables (A) connect expansion cards, I2C cables (C) handle communication (not fan power), and SATA cables (D) link storage drives-none are relevant to fan removal. In DLC systems, where fans may supplement liquid cooling, power disconnection remains critical, making B the verified answer.
References: Supermicro fan replacement guides, DLC hybrid cooling safety standards.
NEW QUESTION # 23
What are the full steps and proper order for removing the fan board from the motherboard tray?
- A. 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
- B. 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
- C. Pull the fan board straight up and out of the tray
- D. Disconnect the power supply from all the fans > Pull the fan board straight up and out of the tray
Answer: B
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 # 24
Which 3 components of the SYS-421GE-TNHR2-LCC does this training discuss break/fix for? (Choose 3 answers)
- A. Bluetooth
- B. Motherboard Tray
- C. PCIe 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 # 25
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 4 screws that need to be loosened, two on each side of the front of the PCIe tray
- C. There are 2 screws that need to be loosened, one 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: B
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 # 26
In order to remove a side bracket from the SYS-421GE-TNHR2-LCC, where are the 4 screws located that must be removed?
- A. 4 screws on the top, 0 screws on the side
- B. 2 screws on the top, 2 screws on the side
- C. 1 screw on the top, 3 screws on the side
- D. 3 screws on the top, 1 screw on the side
Answer: B
Explanation:
The side bracket in the SYS-421GE-TNHR2-LCC, likely housing add-on components, is secured with2 screws on the top and 2 on the side, a balanced approach seen in Supermicro's modular designs (e.g., SYS-
420GP-TNAR). This distribution ensures stability and accessibility, common in DLC systems with dense configurations. A (all top) or C (3 top) skews placement, while B (1 top) is insufficient. D aligns with Supermicro's chassis engineering, making it correct.References:Supermicro chassis bracket guides, DLC system structural design.
NEW QUESTION # 27
To remove an AOC NIC card, simply pull the card straight up. True or False.
- A. False
- B. True
Answer: A
Explanation:
Removing an AOC NIC card in Supermicro systems like the SYS-421GE-TNHR2-LCC requires more than pulling straight up. Per standard procedures (e.g., SYS-420GP-TNAR), you must first unscrew the card from its bracket (1 screw) and release any retaining mechanisms (e.g., PCIe slot latch). Simply pulling risks damage to the card or slot, especially in DLC setups with dense configurations. False (B) reflects Supermicro' s emphasis on careful hardware handling, making it the correct answer.References:Supermicro AOC card removal guides, DLC system component safety.
NEW QUESTION # 28
Before removing the LPIO board from the PCIe tray, what other component needs to be removed first?
- A. Air shroud
- B. Metal bracket
- C. GPU tray
- D. Motherboard tray
Answer: B
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 # 29
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