A+ 3.6.8 Memory Installation (Practice Questions)
You have an older computer that has four DDR2 memory slots. Currently, there are two 512-MB memory modules installed. You check the motherboard documentation and find that the system has a 4-GB memory limitation. You want to add more memory to this system. What is the maximum total amount of usable RAM you can have in this system by adding new memory modules (and without replacing the existing memory modules)? [ ] 3.5 GB [ ]4 GB [ ] 2 GB [ ] 3 GB [ ] 4.5 GB [ ] 1.5 GB
3 GB
You want to build a new system that supports 16 GB of memory. Which of the following is the MOST important consideration when building the computer? [ ] CAS latency [ ] 64-bit processor [ ] ECC memory [ ] DDR3 memory
64-bit processor
You work as the IT administrator for a small corporate network. Sam, an employee in the support department, wants to run a virtual machine on his computer for troubleshooting customer issues, and he needs a very stable computer from which to work. You need to decide whether to install buffered or non-buffered RAM in his computer. Which of the following BEST describes the reason to choose buffered instead of unbuffered memory for this new computer? [ ] Buffered memory reduces the load on the memory controller and allows the system to be more stable. [ ] Buffered memory reduces the load on the memory controller, but due to the extra clock cycle, is less stable. [ ] Buffered memory is faster and less expensive. [ ] Buffered memory increases the load on the memory controller, but is faster and more stable.
Buffered memory reduces the load on the memory controller and allows the system to be more stable.
With a memory module read request, there is a delay between the time of the data request and the time the data is available for output from the memory module. What is this delay called? [ ] Capacity [ ] Clock cycle parity [ ] CAS latency [ ] Frequency
CAS latency
You are in a carpeted office lighted by fluorescent bulbs. You are preparing to add memory modules to a user's computer. The user has already unpacked the memory modules and stacked them on top of an old, unused CRT monitor. What is the greatest threat to these memory modules in this environment? [ ] Electrostatic discharge (ESD). [ ] Electromagnetic interference (EMI) from the fluorescent lights. [ ] High-voltage discharge from the CRT monitor. [ ] The magnetic field around the CRT monitor.
Electrostatic discharge (ESD).
Which of the following is the most common method for removing RAM from a motherboard? [ ] Tip the RAM module at a 45-degree angle while pulling on it. [ ] Pull the RAM module up from one corner and then twist to release the other corner. [ ] Remove the screw from the one side; then pull straight up to remove the RAM. [ ] Move the tabs holding the RAM out of the way; then pull straight up to remove the RAM.
Move the tabs holding the RAM out of the way; then pull straight up to remove the RAM.
Which of the following statements is true regarding single- and double-sided memory? [ ] Single-sided memory uses half the number of memory modules as double-sided memory of the same capacity. [ ] Single-sided RAM can be organized into two banks. [ ] Double-sided RAM always has modules on both sides of the circuit board. [ ] Double-sided RAM allows the computer to access all of the memory.
Single-sided memory uses half the number of memory modules as double-sided memory of the same capacity.
You have just upgraded the memory in one of your network servers by adding two 4-GB ECC memory cards. Before purchasing the new memory, you made sure that the modules fit in the memory slots (packaging) and the speed (memory frequency) was supported by the memory controller. What did you forget to check that would significantly impact the memory checking of your new ECC memory cards? [ ] Whether or not the new memory modules are single- or double-sided. [ ] Whether or not the existing memory modules support parity RAM. [ ] Whether or not the existing memory modules support ECC. [ ] Whether or not the new memory modules are buffered.
Whether or not the existing memory modules support ECC.
You are trying to push a memory module into a memory slot, but it is not seating properly. What is the MOST likely issue? [ ] You need to push down the slot tabs and move them back. [ ] You need to clear debris from the memory slot. [ ] You are trying to install a single-sided memory module in a double-sided slot. [ ] You are trying to install the memory module backwards in the memory slot.
You are trying to install the memory module backwards in the memory slot.
You have an existing system that has a single DDR3 memory module installed. You would like to add more memory to the three remaining empty memory slots. Which of the following steps should you take to make sure that you get the right memory for the system? (Select two.) [ ] Purchase the slowest modules to ensure compatibility. [ ] Purchase additional modules that are the same as what is currently installed. [ ] Purchase the fastest modules possible. [ ] Update the BIOS and then purchase the newest memory modules available. [ ] Check the motherboard documentation to find which modules are supported.
[x] Purchase additional modules that are the same as what is currently installed. [x] Check the motherboard documentation to find which modules are supported.
