CS 160 Final Exam Review QUESTIONS WITH ANSWERS

CS 160 Final Exam Review QUESTIONS
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WITH ANSWERS |\




Why is the language of a computer binary? - CORRECT
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ANSWERS ✔✔It's easier, cheaper, and more reliable to |\ |\ |\ |\ |\ |\ |\ |\



build machines and devices that only have to distinguish
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between binary states. |\ |\




What is the 4-bit binary number for the decimal number
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Eleven (11)? - CORRECT ANSWERS ✔✔1011
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What is the minimum number of bits you would need to
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encode the 26 letters of the alphabet plus a space - a
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total of 27 characters? - CORRECT ANSWERS ✔✔5 bits
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Which components in the list would be considered "input"
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devices? - CORRECT ANSWERS ✔✔keyboard, mouse,
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touch screen |\




Without a processor, a computer cannot run software. -
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CORRECT ANSWERS ✔✔True |\ |\




ASCII is a character-encoding scheme that uses a numeric
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value to represent each character. For example, the
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,uppercase letter "A" is represented by the decimal (base |\ |\ |\ |\ |\ |\ |\ |\ |\



10) value 65.
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ASCII values are stored as binary numbers in the
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computer. Which uppercase letter is represented with |\ |\ |\ |\ |\ |\ |\



binary 0100 1011 ? - CORRECT ANSWERS ✔✔K
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PCC uses an 8 bit number to represent the each student's
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unique pccID. If enrollment doubles, which option below
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would be the smallest change necessary to the way pccID
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is stored to ensure each incoming student receives a
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unique ID? - CORRECT ANSWERS ✔✔Add a bit to pccID to
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double the number of IDs that the database can
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represent.


Number systems with different bases such as binary
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(base-2) and decimal (base-10) are all used to view and
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represent digital data. |\ |\




Which of the following is NOT true about representing
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digital data? - CORRECT ANSWERS ✔✔Some large
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numbers cannot be represented in binary and can only be
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represented in decimal.
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Which of the following RGB values represent the color
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below? (Magenta) - CORRECT ANSWERS ✔✔255, 0, 255
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,A computer program uses 4 bits to represent nonnegative
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integers. Which of the following statements describe a
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possible result when the program uses this number
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representation?
I. The operation 4 + 8 will result in an overflow error.
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II. The operation 7 + 10 will result in an overflow error.
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III. The operation 12 + 3 will result in an overflow error. -
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CORRECT ANSWERS ✔✔II only |\ |\ |\




Which of the following explains a benefit of using open
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standards and protocols for Internet communication? - |\ |\ |\ |\ |\ |\ |\



CORRECT ANSWERS ✔✔Open standards and protocols |\ |\ |\ |\ |\ |\



allow different manufacturers and developers to build
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hardware and software that can communicate with |\ |\ |\ |\ |\ |\ |\



hardware and software on the rest of the network. |\ |\ |\ |\ |\ |\ |\ |\




Which of the following is a true statement about Internet
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communication? - CORRECT ANSWERS ✔✔Every device |\ |\ |\ |\ |\ |\



connected to the Internet is assigned an Internet protocol |\ |\ |\ |\ |\ |\ |\ |\ |\



(IP) address. |\




A computer program uses 5 bits to represent nonnegative
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integers. Which of the following statements describe a
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possible result when the program uses this number
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representation?
I. The operation 10 + 8 will result in an overflow error.
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, II. The operation 16 * 2 will result in an overflow error.
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III. The operation 20 + 18 will result in an overflow error. -
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CORRECT ANSWERS ✔✔II and III only |\ |\ |\ |\ |\




The following figures represent different ways of
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configuring a network of physically linked computers |\ |\ |\ |\ |\ |\ |\



labeled P, Q, R, and S. A line between two computers
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indicates that the computers can communicate directly |\ |\ |\ |\ |\ |\ |\



with each other. In which configuration is it NOT possible
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to have redundant routing between computers P and S? -
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CORRECT ANSWERS ✔✔The one that has a single path |\ |\ |\ |\ |\ |\ |\ |\ |\



going from P to R to Q to S |\ |\ |\ |\ |\ |\ |\ |\




Which of the following statements are true about routers
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and routing on the Internet. Choose two answers. -
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CORRECT ANSWERS ✔✔Routers act independently and |\ |\ |\ |\ |\ |\



route packets as they see fit.
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A packet traveling between two computers on the
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Internet may be rerouted many times along the way or
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even lost or "dropped". |\ |\ |\




Convert decimal 23 to an 8 bit binary number. - CORRECT
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ANSWERS ✔✔00010111 |\