EET250 Unit 3 Midterm Exam Reviewed. All Answers 100% Correct.

EET250 Unit 3 Midterm Exam Question 1 1.71 / 2 pts Match the memory listed with the most appropriate description. Correct! SoDIMM Module used in laptops Correct! LPDDR Tablets and smartphones ECC U ...

EET250 Unit 3 Midterm Exam Question 1 1.71 / 2 pts Match the memory listed with the most appropriate description. Correct! SoDIMM Module used in laptops Correct! LPDDR Tablets and smartphones ECC Used in today's mission-critical servers Correct! DDR4 Module used in new desktops Correct! SDRAM Type of memory formerly used Correct! Parity Able to detect but not correct Correct! SIMM Predecessor to modern memory Question 2 2 / 2 pts Match the correct hard drive interface to its description. IDE SATA eSATA M.2 Answer 1: Correct! IDE Answer 2: Correct! SATA Answer 3: Correct! eSATA Answer 4: Correct! M.2 Question 3 2 / 2 pts To become A+ Certified, you must pass a total of ____ exams. Enter a single-digit number. Correct! 2 4 6 3 Question 4 2 / 2 pts Which two of the following are the most common spindle speeds used by hard drives in today’s desktop and laptop computers? 3600 Correct! 5400 Correct! 7200 10000 15000 Question 5 2 / 2 pts Which of the following are serial bus technologies? Select all that apply. Correct! USB Correct! SATA Correct! IEEE 1394 (firewire) Correct! PCIe PCI IDE/ATA ISA Question 6 0 / 2 pts In the view shown, what can we conclude about installed physical hard drives? There are two hard drives, C & E There is one hard drive with two volumes, C & E Correct Answer There are two volumes, C & E, but we cannot tell how many hard drives there are There is one partition with two logical drives, C & E Question 7 2 / 2 pts Convert the binary number 11110101 to hexadecimal. Indicate the correct hexadecimal answer with no labels or other additional information. Your Answer: F5 Question 8 1.33 / 2 pts Which of the following are advantages of NTFS over FAT32? Correct! Ability to encrypt files and folders Correct Answer Ability to compress files and folders Redundant storage of files Correct! Ability to set file permissions Can support drives larger than 32 GBytes on any operating system Better suited for external media due to low overhead Question 9 2 / 2 pts Which of the following is the easiest way to properly configure a hard drive as master when using the 80 wire cable? Jumper the drive as cable select and connect the gray connector to the drive Jumper the drive as master and connect the blue connector to the drive Correct! Jumper the drive as cable select and connect the black connector to the drive Jumper the drive as cable select and connect the blue connector to the drive Question 10 0 / 2 pts On the older IDE hard drive interface there is a 40-pin connector. The cable attaching to this connector can have 40 wires or 80 wires. The 80 wire version is superior and has a faster data transfer rate because it _____. You Answered Has additional signal-carrying conductors Correct Answer Uses the extra 40 wires as shields to reduce crosstalk It is newer and contains silver in the conductors The smaller wires present less impedance to current flow Question 11 2 / 2 pts Consider a hypothetical hard drive that has 400,000 cylinders, 8 heads, and 128 sectors per track. Demonstrate, in writing, how you would calculate the total capacity of this drive. Assume a sector size of 512 bytes and express your answer in GBytes, to the nearest whole GByte, as defined in computer Science. Your Answer: sector= 512B, track = 128 sectors (64KB),cylinder = 8x128 (512KB), 400,000 cylinders = 400,000x512 KB (195.3 GB) The approximate capacity of the hard disk drive is 195GB Question 12 2 / 2 pts Which of the following best describes a DIMM? A module that has memory chips mounted on both sides Correct! A module that makes contact with the socket on both sides A module that has real contacts on only one sided. A module that has memory chips mounted on one side only Question 13 0 / 2 pts Older drives expressed drive geometry logically in terms of cylinders, heads, and sectors per track. Newer drives generally have the letters ___ followed by the number of sectors on the drive. To calculate their capacity, multiply this number x 512 bytes. SPT Correct Answer LBA CAP CHS Question 14 2 / 2 pts A major difference between DRAM and SRAM is that _____. DRAM is a newer type of memory than SRAM Correct! DRAM requires periodic refreshing DRAM comes on DIMMs, SRAM comes on SIMMs SRAM requires periodic refreshing Question 15 2 / 2 pts When referring to virtual memory on a computer, which of the following is the best definition. Correct! An area on the hard drive (or SSD) that supplements RAM Memory that doesn't really exist A high-performance memory that resides within the CPU Cloud storage Question 16 2 / 2 pts Which two of the following CPUs are in AMD’s current mainstream desktop market? Core i3 Core i5 Core i7 Pentium Celeron Sempron Correct! Athlon Correct! FX Question 17 2 / 2 pts Convert the binary number 11110101 to decimal. Express your answer as a numerical value, with no other information (you do not have to show your work on this question). Your Answer: 245 Question 18 2 / 2 pts Refer to the illustration. The RAM module on the right is most correctly referred to as a _____. Correct! SoDIMM DIMM RIMM SIMM Question 19 2 / 2 pts Consider two CPUs that have the same core speed of 3.2 GHz. Both are 64-bit processors and both have the same amount of cache. They both are said to handle 4 threads. Which of these is most likely to outperform the other? 2 cores with hyperthreading Correct! 4 cores without hyperthreading Question 20 2 / 2 pts Which two of the following CPUs are in Intel’s current budget desktop market? Core i3 Core i5 Core i7 Correct! Pentium Correct! Celeron Sempron Athlon FX Question 21 2 / 2 pts One Gigahertz is equal to ____ clock cycles per second. one thousand Correct! one billion one trillion one million Question 22 2 / 2 pts The main difference(s) between the metric M3 screws and the Universal Thread Standard 6-32 screws used in PCs is ____. there is no difference - M3 is the metric equivalent of the UTS 6-32 length and head shape Correct! body thickness and thread pitch the type of screwdriver needed (Phillips vs. Torx) Question 23 2 / 2 pts 4 GB is the maximum addressable memory in a 32-bit system. Many such systems with 4 GB of RAM installed will only show 3.5 GB (or less) RAM. This discrepancy is due to which of the following? The difference between calculations used by RAM manufacturers and Microsoft Correct! Some addressable space is required for the BIOS/UEFI and I/O devices Microsoft rounded up in their statement of maximum addressable memory The operating system is consuming part of memory Overhead needed for the swap file Question 24 2 / 2 pts A good way to tell an ATX, BTX, and ITX form-factor motherboards apart is by _____. Size, and the color of the expansion slots and RAM slots Correct! Size and the position of I/O connectors on the rear of the motherboard. Size and the color of the motherboard Question 25 2 / 2 pts If a file is deleted (right-click, delete), and the recycle bin is emptied, and no backup of the file exists, there is no way to recover the file. True Correct! False Question 26 2 / 2 pts A memory module is labeled PC3-12800. Which two of the following statements are true? It is DDR2 Correct! It is DDR3 It is DDR4 It is capable of a throughput of 12800 bytes per second Correct! It is capable of a throughput of 12800 MB per second It is capable of a throughput of 12800 GB per second It is clocked at 12.8 MHz It is clocked at 12.8 GHz Question 27 0 / 2 pts The computer science definition, and the definition used by Microsoft, of one kilobyte is 1024 bytes. The computer science definition of one gigabyte is _____ bytes. 1,000,000 1,048,576 1,000,000,000 1,073,741,824 Question 28 2 / 2 pts RAM is said to be volatile. This means that ____. the information does not need to be refreshed the memory is stagnant Correct! information is lost when power is removed the information must be refreshed frequently Question 29 2 / 2 pts The purpose of the wrist strap that PC technicians should wear when working with PCs is to ____. Correct! Protect components from static shock Protect components from excessive voltage from the power supply Protect the technician from static shock Protect the technician from electrical shock from the power supply Question 30 2 / 2 pts ECC RAM would mostly be found in ______. tablets desktops laptops smart phones Correct! servers Question 31 2 / 2 pts Most current generation Intel CPUs are of the PGA design. True Correct! False Question 32 2 / 2 pts Match the video connectors to the most appropriate description. Analog video signals Digital and analog video signals, no sound Digital video signals & sound Answer 1: Correct! Analog video signals Answer 2: Correct! Digital and analog video signals, no sound Answer 3: Correct! Digital video signals & sound Question 33 2 / 2 pts Many of today’s computers have 3 levels of cache known as L1, L2, and L3. Which of the following statements are true? Select all that apply. Correct! L1 is located on the CPU L1 is located on the hard drive L2 is located in a memory slot on the motherboard Correct! L2 is located on the CPU L2 is located on the hard drive L3 is located in a memory slot on the motherboard Correct! L3 is located on the CPU L3 is located on the hard drive Question 34 2 / 2 pts Software that tells the computer how to communicate with an input/output device is called ______________. an Interrupt vector Peripheral device Port replicator Correct! device driver Question 35 2 / 2 pts What is the spindle speed on an SSD? Explain your answer. Your Answer: There is no spindle speed for an SSD as it has no spindle head, nor any other moving parts. Question 36 2 / 2 pts The power switch on the front of an ATX system connects via a pair of wires to a connector on the _____. Your Answer: front panel header on the motherboard Question 37 2 / 2 pts SoDIMMs are likely to be found in which 3 of the following? (Choose 3!) Desktops Correct! Routers Servers Correct! Laser printers Mainframes Correct! Notebooks/Laptops Question 38 2 / 2 pts Once you delete a file and then empty the recycle bin, there is no way to recover the file from the hard drive. True Correct! False Question 39 2 / 2 pts The cooling fans in a computer chassis should be arranged, for best cooling, so that any fans in front are blowing air ___ the computer and the fans in the back are blowing air ___ the computer. it really doesn't matter Correct! into, out of into, into out of, out of Question 40 2 / 2 pts Match the term to the most accurate description. Each term will be used only once. Correct! Used to read/write information from/to a recording surface Read/write head Correct! Memory on the hard drive used for buffering with the goal of increasing data throughput from the hard drive to the motherboard. Cache Correct! A collection of concentric circles, one on each of several recording surfaces. Cylinder Correct! A single concentric circle on one recording surface. Track Correct! A File Allocation Unit consisting of a group of (typically) 512 byte units. Cluster Correct! A physical unit of data consisting of (typically) 512 bytes. Sector Question 41 2 / 2 pts You are installing a video graphics card in a PC that is only a couple of years old. This card will most likely be installed in which of the following type of expansion slots? PCIe X1 Correct! PCIe X16 PCI MCA AGP Question 42 2 / 2 pts You are looking at a DIMM. Which of the following is the both the best and easiest way to tell whether it is an SDRAM, DDR, or other type? Correct! Look at the position of the nothces Ask the owner of the PC Manually count the pins Guess Question 43 2 / 2 pts Which of the following statements best describes what we refer to as "CMOS" on a personal computer? Complimentary Metal-oxide Semiconductor Correct! A small amount of memory where motherboard configuration information is stored a small battery about the size of a nickel Firmware used to perform system checks and bootstrap the computer Question 44 2 / 2 pts Describe what POST does. Your answer must go well beyond what it stands for. Your Answer: When a computer is turned on, POST is the series of diagnostic tests that are performed by the BIOS. If the POST is successful, the computer will boot, if not, you will receive an error indicator, either a message or a series of beeps. Question 45 2 / 2 pts Consider a drive that states: LBA = 976,562,500. Demonstrate, in writing, how you would calculate the total capacity of this drive both as defined by hard drive manufacturers and by computer science. Assume a sector size of 512 bytes. Your Answer: 1024x1024x1024 = 1073741824 Bytes per gigabyte 976562500x512=500,000,000,000 500,000,000,000/1073741824=465.66 GB Question 46 2 / 2 pts Most current generation AMD CPUs are of the PGA design. Correct! True False Question 47 2 / 2 pts During the boot process, what determines which storage device to attempt booting from first? CONFIG.SYS Correct! CMOS Configuration Device Manager IO.SYS Question 48 2 / 2 pts Which of the following is the hard drive interface in common use on most desktop and laptop computers today? MFM IDE (PATA) SAS SCSI Correct! SATA Question 49 2 / 2 pts ExFAT is preferred over NTFS for external media due to which two of the following? Correct! Wider support by multiple vendors Greater security Correct! Lower overhead Ability to exceed the limited 4 GB file size of NTFS Ability to exceed the limited 2 TB partition size of NTFS Question 50 2 / 2 pts On a particular motherboard made around 2008 there are two very large scale integrated circuits (VLSI). Neither of these is in the CPU socket and one of them has a heatsink installed on it. These two chips are most likely the _____. math co-processors Correct! chipset USB Hubs Ethernet controllers