Answer:
"Waterfall" is the correct answer for the above question.
Explanation:
- The Waterfall model is a model which is the first model recognized by some scientists is used to states some rules to develop the software. It is based on the phases of the SDLC. The SDLC is the collection of phase that is used in software development.
- The waterfall model moves like water moves. It means any next phase starts if the previous phase is completed and the user can not move into previous steps of the model.
- This is also asked by the question. Hence the answer is the waterfall model.
r packages include sample datasets. they also include reusable r functions and documentation about how to use the functions.
The above statement is <u>True</u>.
What are R packages?
<u>The statistical programming language R has extensions </u>known as R packages. Users of R can install R packages by <u>accessing a centralized software repository like CRAN</u>, which often contains code, data, and documentation in a common collection format.
The "library" directory is <u>where R </u><u>packages </u><u>are kept in the R environment</u>. During installation, R automatically install a number of packages. Later, when additional packages are required for a particular task, they are added.
To learn more about R packages, use the link given
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Answer:
The correct pseudocode to find the records of all citizens over the age of 50 is IF(age > 50).
OR EACH item IN citzlist
{
WHILE(not end of citzlist)
{
IF(age > 50)
{
DISPLAY(name)
}
}
}
If this is run, it will bring out all the names of the citizen who are over the age of 50 in the list.
Explanation:
Answer:
Answered below
Explanation:
aFile = open("books.txt", "r")
This code uses the function open() which takes two parameters. The first parameter is the file name while the second parameter is the mode in which you are accessing the file.
The "r" mode opens the file in a reading state. That is, you can only read from the file. This code completes the reading process
aFile.read( )
The "w" mode opens the file so you can write to it and make changes.
The "a" mode opens the file so you can add contents to it.
