220-1101 Question 231
Single answerSmall Outline Dual In-line Memory Module (SODIMM)A technician is upgrading a user's laptop from 8 GB to 16 GB of RAM. The laptop currently has one 8 GB memory module installed and one empty memory slot. After removing the bottom cover, the technician confirms the existing module is a DDR4 SODIMM. To avoid compatibility issues and complete the upgrade with the best chance of stable operation, which replacement part should the technician install?
- A
An 8 GB DDR4 SODIMM that matches the laptop's supported speed and voltage
- B
An 8 GB DDR4 DIMM with the same speed rating as the current module
- C
An 8 GB DDR3 SODIMM because laptop memory is backward compatible
- D
A 16 GB DDR4 SODIMM to replace the existing 8 GB module while leaving the second slot empty
Show answer and explanation
Correct answer: A
Explanation
This question tests practical knowledge of laptop memory upgrades in an A+ Core 1 context. SODIMM stands for Small Outline Dual In-line Memory Module and is the compact RAM form factor typically used in laptops and some small-form-factor devices. A technician must verify both the memory generation, such as DDR4, and the physical form factor, such as SODIMM, before installing RAM. Full-size DIMMs are for desktops and will not fit in laptop slots. In addition, DDR generations are not cross-compatible because they differ in notch placement, signaling, and voltage requirements. Best practice is to consult the laptop manufacturer's service manual or hardware specifications for supported memory type, capacity per slot, total capacity, and speed support before installation.
- A. Correct.
Correct. Laptops commonly use SODIMMs rather than full-size DIMMs. Installing an additional 8 GB DDR4 SODIMM that matches the system's supported specifications is the most appropriate way to increase total memory from 8 GB to 16 GB while keeping the existing module in place. Matching memory type and using a form factor designed for laptops helps avoid fitment and compatibility problems.
- B. Incorrect.
Incorrect. Although the speed rating may match, a DIMM is the full-size memory module used in most desktop systems, not laptops. A DDR4 DIMM will not physically fit into a SODIMM slot. This distractor targets the misconception that memory type alone matters, when form factor is also critical.
- C. Incorrect.
Incorrect. DDR3 and DDR4 are different memory generations with different electrical characteristics and notch placements. They are not interchangeable, and laptop memory is not simply backward compatible across these generations. This option reflects a common misunderstanding about RAM compatibility.
- D. Incorrect.
Incorrect. Replacing the 8 GB module with a single 16 GB DDR4 SODIMM could work only if the laptop supports a 16 GB module in that slot, but it is not the best answer for the stated goal of upgrading from 8 GB to 16 GB when one slot is already empty. The scenario indicates the technician can achieve 16 GB by adding a matching 8 GB SODIMM, which is the most direct and practical solution.