Final answer:
A DDR3 SODIMM typically has 204 pins and is used in laptops and compact devices for memory upgrades or replacements, requiring a match in pin count for socket compatibility.
Step-by-step explanation:
A DDR3 SODIMM, which stands for Double Data Rate 3 Small Outline Dual In-Line Memory Module, typically has 204 pins. These memory modules are used in laptops and other compact devices due to their smaller size compared to standard DIMMs.
The number of pins is important for matching the memory module to the correct socket on a motherboard. When upgrading or replacing laptop memory, it is essential to ensure that the DDR3 SODIMM has the correct pin count for compatibility with the device.