Testout Labsim Answers

4/6/22, 4:09 PM TestOut LabSim Section Quiz Candidate: Date: 4/6/2022 4:09:23 pm • Time spent: 12:27  Passing Score: 80% Question 1:  Score: 40% Correct Which of the following components stores values in short-term memory? Flash drive Hard drive Processor RAM EXPLANATION RAM stores values in short-term memory. Hard drives store data in long-term memory. Processors execute instructions stored in computer programs. Flash drives are portable devices that store data in long-term memory. REFERENCES  3.3.1 Internal Computing Components  3.3.2 Internal Computing Component Facts 1/5  Question 2: TestOut LabSim  4/6/22, 4:09 PM Correct Which hardware component processes data? CPU SSD HDD RAM EXPLANATION The CPU, or Central Processing Unit, processes data. RAM stores values in short-term memory. HDD and SDD are two types of long-term memory storage. REFERENCES  3.3.1 Internal Computing Components  3.3.2 Internal Computing Component Facts  3.3.5 CPU Types  3.3.6 CPU Facts  Question 3:   3.6.5 Processor Troubleshooting Incorrect Which of the following components converts AC to DC? Surge protector Power supply Capacitor Voltage regulator EXPLANATION A computer's power supply converts alternating current (AC) from the wall outlet to direct current (DC) used by the computer's internal components. A voltage regulator is an electronic device that supplies the appropriate voltage to a processor. It does not convert the power input from one form to another; it only ensures that the voltage remains at the appropriate level for the device. A surge protector protects a system from power spikes. A UPS (uninterruptable power supply) provides backup AC power using a reserve battery. REFERENCES  3.3.1 Internal Computing Components  3.3.2 Internal Computing Component Facts  4.3.1 System Software  4.3.2 System Software Facts 2/5  Question 4: TestOut LabSim  4/6/22, 4:09 PM Incorrect Which of the following computer components is the MOST important part of any modern computer? BIOS NIC CPU RAM EXPLANATION The CPU is the most important part of any modern computer system because it controls the other parts of the computer. RAM is the main memory of a computer. It can be quickly accessed by the CPU and is where the computer stores data and instructions that it is actively using. A network interface card (NIC) is a component (sometimes built into the CPU and sometimes plugged into the motherboard) that provides network connectivity. The BIOS makes sure all necessary parts are plugged in and working properly on bootup. REFERENCES  3.3.1 Internal Computing Components  3.3.2 Internal Computing Component Facts  3.3.5 CPU Types  3.3.6 CPU Facts  Question 5:   3.6.5 Processor Troubleshooting Correct Becca is working on a program that will store data. The program will need quick access to data and data persistence is not important. Where should the data be stored? In a database In memory In a flat file In flash memory EXPLANATION Random Access Memory (RAM) is extremely fast, and the processor can read from and write to it billions of times each second. RAM is not persistent, which means if the system turns off, RAM loses everything it had stored in memory. But data persistence is not important in this scenario. Flash memory, flat files, and databases all provide persistent storage, but much slower data access than RAM. REFERENCES  7.2.2 Data Modeling  7.3.2 Relational Database Facts  7.3.6 Relational Methods 3/5  Question 6: TestOut LabSim  4/6/22, 4:09 PM Correct Which of the following should be done before working on hardware in a computer system? Ensure the system is plugged in Rub your feet on the carpet Ground yourself using an ESD wrist strap Touch a plastic part of the case EXPLANATION Before working on hardware in a computer system, you should ground yourself so that a static charge doesn't build up. You can wear a special wrist strap that has a metal plate. Rubbing your feet on carpet will build up a static charge. This will shock any component you touch. You should never begin working on hardware in a computer system while it's plugged in. Always unplug a computer before beginning your work. Before working on hardware in a computer system, you can discharge yourself by touching a metal part of the computer case. Touching a plastic part does not discharge any built-up static charge. REFERENCES  Question 7:   3.3.3 Electrostatic Discharge Incorrect Which of the following voltages from an ESD discharge would be the minimum to short a computer's hardware components? 5 volts 100 volts 12 volts 3.3 volts EXPLANATION An ESD discharge as small as 100 volts can damage a computer's components. 12, 5, or 3.3 volts are common voltages used for powering components. A ESD discharge this small wouldn't hurt a component. REFERENCES  3.3.3 Electrostatic Discharge 4/5  Question 8: TestOut LabSim  4/6/22, 4:09 PM Incorrect Where are values the computer is directly working with at a particular moment in time stored? On the CPU clock On RAM On the hard drive On the CPU register EXPLANATION The CPU register stores values the computer is working with at a particular moment in time. RAM stores the instructions for the CPU to execute as well as the results of any calculations that the processor doesn't need to work with at the given moment. Hard drives are long-term storage for files and applications.  Question 9:  The CPU clock controls the speed that a processor executes instructions. Incorrect Which of the following companies is a manufacturer of CPUs? DELL Apple Intel nVidia EXPLANATION Intel is one of the biggest manufacturers of CPUs along with AMD. nVidia is known for making graphic processing units (GPUs).  Question 10:  Apple and DELL both make computer systems but not the hardware inside of them. Incorrect Which CPU type would MOST LIKELY be found in a smartphone? x64 x86 ARM IA-64 EXPLANATION Most tablets and smartphones use ARM processors. ARM processors use a reduced instruction set, which means they can't do as many things as x86 processors can. x86 processors are 32-bit CPUs used in computer systems. x64 processors are 64-bit CPUs used in computer systems. IA-64 processors were special CPUs developed by Intel that were only used in servers. 5/5