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COIS 1010H Midterm: Answers to Potential Test Questions

5 Pages

Computing & Information Systems
Course Code
COIS 1010H
Dr.Sabine Mc Connell

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Lecture 1 1. Describe the machine cycle: Fetch the programs instructions are fetched Decode the instructions are decoded (translated), so control unit, APU, FPU can understand them Execute the instructions are carried out Store the original data or result from APU or FPU execution is stored in the CPUs registers 2. Describe the three main components of a computer: CPU central processing unit, does all the calculations Memory stores the instructions for CPU and the results Power supply provides the needed electricity for other components 3. Describe four components of a CPU ALU, FPU perform arithmetic and logical calculations Control Unit in control of everything, instructs other parts what to do Registers hold the result of processing Bus Interface Unit the place where data and instructions enter or leave 4. Describe four different types of storage used in a computer Hard Disk Drives they store the information on magnetic disks Solid State Drives they store information on flash memory Hybrid Disk Drives the symbiosis of HDD and SSD, SSD is cache for increased efficiency Magnetic Tape Drives they store information on a magnetic tape, low cost for megabyte, used commonly in archives 5. Why is it important to have fans in a computer? Because computer components generate heat as current flows through them, so fans help dissipate that heat. The absence of cooling solution will cause severe parts degradation and possible failure.Lecture 2 1. Describe the differences between wired and wireless networks Convenience for wireless networks: can be used in certain range, thus gives mobility, while wired network needs a cable attached to operate Reliability for wired: wireless networks can be interfered or disrupted by weather, walls, other wireless networks in the same range, wired is typically redundant in this sense Security for wired: to interfere and hack into the wired network, you need to be physically attached to a cable, whereas wireless network can be interfered in certain range Cost for wireless: new wireless networks can be deployed easily (using wireless range extenders, towers or satellites), whereas wired needs a cable physically run to a place to operate Speed for wired: wired network has better speed that wireless, as much more data can be transferred in cable. 2. Describe some of the ways we can use to classify networks (by topology, architecture, size) Topology: star, bus, mesh, or combined Architecture: client-server networks Size: PAN (person
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