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Python
8 Quiz Sets
Python
Python Full Review
Answer
25
questions in 10 minutes.
Python Full Review |
1. 9 | 4
Bitwise or - turns on bits if turned on in either input - 0b001 | 0b100 = 0b101
False
An explicit function call that takes a value of one type and computes a corresponding value of another type.
End
2. Main memory is commonly known as _______________.
Ram
Flags
True
Order of operations: mode of operations: parentheses exponents multiplication division addition subtraction
3. Not equal
Find files
Hardware
Floating point numbers
Err:509
4. Block
A group of consecutive statements with the same indentation.
Matches an option x character (in other words - it matches an x wero or one times)
Gives you the entire list
Defines a function
5. Min()
Condition
To subtract one from a variable.
Modulus and. Takes modulus using two operands and assigns the result to left operand a%=b ~ a = a%b
Takes smallest out of a set of numbers and returns it
6. Python allows programmers to
Reads a line of input from user and returns as string
Break a statement into multiple lines.
- method flushes unwritten information and closes file object - not necessary - but important best practice
While keep_on_going != 999 : when keep_on_going refers to a value not equal to 999
7. Local variable
A variable defined inside a function. A local variable can only be used inside its function. Parameters of a function are also a special kind of local variable.
Export/set a new environment variable
Order of operations: mode of operations: parentheses exponents multiplication division addition subtraction
Diamond
8. Integer division
Floating point numbers
It allows you to input parameters from the command line.
Matches any numeric digit
An operation that divides one integer by another and yields an integer. Integer division yields only the whole number of times that the numerator is divisible by the denominator and discards any remainder.
9. True/false: a better way to repeatedly perform an operation is to write the statements for the task once - and then place the statements in a loop that will repeat the statements as many times as necessary.
Fetch-decode-execute
Add to a list by typing list_name.append()
True
Conditionally
10. - method flushes unwritten information and closes file object
-put decimal after integers to make floating point
- not necessary - but important best practice
Else
True
11. !=
< > <= >= - == !=
Means doesn't equal
Condition
Character with 16-bit hex value xxxx (unicode only)
12. What's the difference between argv and raw_input()?
Gives you the whole list - starting at the 0 position
Str = separator (optional) - numb = number of separations (optional)
The difference has to do with where the user is required to give input. If they give your script inputs on the command line - then you use argv. If you want them to input using the keyboard while the script is running - then use raw_input(). Line 3: Script - first - second - third = argv - Line 3 "unpacks" argv so that - rather than holding all the arguments - it gets assigned to four variables you can work with: script - first - second - and third. This may look strange - but "unpack" is probably the best word to describe what it does. It just says - "take whatever is in argv - unpack it - and assign it to all of these variables on the left in order." (ex13.py)
String (converts any python object using repr())
13. File
Die function that prints out an error message - in case the else doesn't make sense. Shows errors.
A named entity - usually stored on a hard drive - floppy disk - or cd-rom - that contains a stream of characters.
Subtract and. Subtracts right operand from left and assigns the result to the left. A-=b ~ a = a - b
Create a user defined exception
14. Where does a computer store a program and the data that the program is working with while the program is running?
Called an "import." This is how you add features to your script from the python feature set. Rather than give you all the features at once - python asks you to say what you plan to use. This keeps your programs small - but it also acts as documentation for other programmers who read your code later. May access features other than "argv"
Make directory
Main memory
Add and x = x + y
15. Close
- script = name of python script - first - second - third = 3 variables arguments assigned to
Takes smallest out of a set of numbers and returns it
Page through a file
A method/function/command to close the file
16. %f
Floating point decimal format (uppercase)
Control
**
Matches an x character at least n times - but not more than m times
17. List_name.append("")
Cpu
Appends thing to lists
Returns true if file in argument exists - false if not
Control
18. True/false: an action in a single alternative decision structure is performed only when the condition is true.
A group of consecutive statements with the same indentation.
Is a letter
Pauses the script at the point it shows up - gets the answer from the keyboard - then continues the script. It is one of python's built-in functions - looks something like: var = raw_input("enter_something") where "enter_something" is what the prompt is - asking you to enter some text - and var is where the text is stored . Remember the %r in the prompt
True
19. Conditional statement
An error in the code that means it will not run. Incorrect spelling of keywords - leaving off speech marks or brackets - not using colons for "if" statements.
Sorts a list from lowest to highest - or alphabetical
A statement that controls the flow of execution depending on some condition. In python the keywords if - elif - and else are used for conditional statements.
Available everywhere
20. \t
Compound
Accepts a string - prints it - and then waits for the user to type something and press enter (or return).
Ascii horizontal tab (tab) - 8 horizontal spaces; tab
Condition-controlled loop
21. A(n) ?? Validation loop is sometimes called an error trap or an error handler.
Input
Pretest
List[start:end:stride]
- function opens a file - required argument is filename - default access_mode is read(r) - does not return actual content; creates/reads fileobject
22. \f
While condition : statement
Variable used to determine if bits are on or off in an input -sort of works like a multiple choice test key -can be used with | to turn bits on if off -use with ^ and 11111111 to flip all bits
Ascii formfeed (ff) - ascii control character. Forces printer to eject current page and continue printing at top of another.
True
23. Get()
Relational
Controls flow of the program with truth statements. Statements inside the while loop are executed until the expression evaluates false.
Returns a value for the given key. If key is not available - returns default of 'none'.
D = {'key1' : 1 - 'key2' : 2 - 'key3' : 3}
24. A while-loop is...
If/else
%d
An infinite loop.
Script
25. True/false: python formats all floating-point numbers to two decimal places when outputting using the print statement.
..paragraphs. Each if - elif - and else grouping is like a set of sentences. Put blank lines before and after.
Relational
False
%d
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