The ____ command within relational algebra includes the word OVER followed by a list of the columns to be included. a.|DELETE|c.|INTERSECT| b.|PROJECT|d.|UNION| A 22. Two tables are considered to be ____ compatible if they have the same number of columns and their corresponding columns represent the same type of data. a.|union|c.|difference| b.|intersection|d.|product| C 23. Using the product operator, if table A has 4 rows and table B has 4 rows, the number of rows in the product of these two tables is ____.
By value only a copy of the argument’s value is passed. By reference its passed into a special modification parameter. 7. Why do global variables make a program difficult to debug? Global variables make a program difficult to debug because any statement in a program file can change the value of a global variable.
College/University Research (8 points) POINTS EARNED_____________________ Overview of Selected School or Schools (2 point – 1 paragraph) – Include: • Description of the college(s) you plan to attend. The college must offer the major you’ve chosen for the topic of this paper. Description should include o Demographic information (statistics about the school and its students e.g. avg. age) o Location of the college or university o At least 5 aspects or characteristics about the college(s) that interest you (Check the college catalog or website to find this information.
What value is stored in uninitialized variables? An uninitialized variable is by default a 0. Algorithm Workbench 3-10 3. Write assignment statements that perform the following operations with the variable a, b and c. a) Adds 2 to a and stores the result in b. { b = 2 + a } b) Multiplies b by 4 and stores the result in a.
Why do global variables make a program difficult to debug? Any statement in a program can change the value of a global variable. To find where a bad value is coming from, a programmer would have to track down every statement that has access to that variable. Algorithm Workbench 1. Design a module named timesTen.
Lesson 44—Table Basics Create Tables • Tables consist of columns and rows of data—either alphabetic, numeric, or both. • Column: Vertical list of information labeled alphabetically from left to right. • Row: Horizontal list of information labeled numerically from top to bottom. • Cell: An intersection of a column and a row. Each cell has its own address consisting of the column letter and the row number (cell A1).
Which of the following statements is not true of file processing systems? a.|the records in one file relate to the records in other files| b.|they have redundant data| c.|they isolate data| d.|maintenance tasks consume additional time| ____ 15. Which statement does not apply to the database approach? a.|it requires less memory than file processing systems| b.|it increases the data’s integrity| c.|programs are easier and faster to develop than with a file processing system| d.|it allows nontechnical users to access and maintain data| ____ 16. Which of the following DBMSs will run only on a server or mainframe?
What is the difference between passing an argument by value and passing it by reference? By value only a copy of the value is passed. By reference it’s passed into a special parameter. 7. Why do global variables make a program difficult to debug?
The variables do not show a clear sign of correlation or relationship as shown within the scatterplot. The points are slapdash or disorganized thus making it evident that there is no relationship between the two variables. Overall one can determine that in comparing certain variables there are some matches that provide some cohesiveness whereas all aren’t completely relative to one another. By being able to take sample data and effectively review and analyse it one was able to record which households of what size is more likely to hold a higher credit limit or even what location. With such information AJ Davis Department Stores can have a better outlook as to how their customers are more or less likely to be and can futuristically categorize them based on such
According to both rules, the sample size is small. (d) Why might collinearity account for the lack of significance of some predictors? Collinearity refers to a strong correlation between two variables. This strong correlation makes it difficult or impossible to estimate their individual regression coefficients reliably (Statistics.com, 2010). In this case rebounds and points are highly