Suppose that the relation Star sin discussed in Example 8.14 required 100 pages rather than 10, but all other assumptions of that example continued to hold. Give formulas in terms of p_1 and p_2 to measure the cost of queries Q_1 and Q_2 and insertion I, under the four combinations of index/no index discussed there.

What is the item which could be matched with a statement below? software installed on a computer that produces pop-up ads using your browser an example of social engineering malware loads itself before the os boot is complete type of spyware that tracks your keystrokes, including passwords windows key + l the practice of tricking people into giving out private information or allowing unsafe programs into the network or computer when someone who is unauthorized follows the employee through a secured entrance to a room or building a type of malware that tricks you into opening it by substituting itself for a legitimate program a computer that has been hacked, and the hacker is using the computer to run repetitive software in the background without the user's knowledge an infestation designed to copy itself repeatedly to memory, on drive space, or on a network

Which of the following methods could be considered a “best practice” in terms of informing respondents how their answers to an on-line survey about personal information will be protected? the investigator uses the informed consent process to explain how respondent data will be transmitted from the website to his encrypted database without ever recording respondents’ ip addresses, but explains that on the internet confidentiality cannot be absolutely guaranteed. respondents are informed that investigators will try to keep their participation confidential; however, confidentiality cannot be assured. the investigator uses the informed consent process to explain her institution’s method for guaranteeing absolute confidentiality of research data. respondents are informed that a research assistant will transfer all the research data to a password-protected computer that is not connected to the internet, via a usb flashdrive. the computer is located in a research team member’s office.

Unit 3 computer programming study guide refer to code.org for puzzles refer to brainpop; under functions, computer programming, variables part one: define. algorithm- a list of steps to finish a task binary- a way to represent information using 1 and 0 bug- part of a program that does not work correctly code- 1 or more commands to be carried out by a computer function debug sequencing loop repeat conditionals variable part two: answer accordingly. a programmer is to a computer as a teacher is to: a good algorithm must be: imagine writing a program that instructs a bird how to take off, fly and land. what function is likely to be looped? which of the following is most similar to a function? what do variables and functions have in common? 8. the main cause of bugs in coding is: 9. list the following in order from the simplest to most complex: function program step 10. if a program has gone through many iterations, what must be true? 11. what is a benefit of drying up code? a. it makes it less likely to break b. it makes the code compatible with different software c. it saves programmers time d. it makes it less vulnerable to hackers 12. a statement in a function can be most closely compared to: a. a step in a recipe b. a line of a poem c. a brushstroke in a painting d. a piece of assembled furniture t/f: are the solutions provided true? t/f: t/f: t/f: