Questions and Answers
What command gives a quick list of defined symbols in Python?
What aspect of a piece of code affects its meaning in Python?
How are logical connectors spelled out in Python?
What is the value of an empty string in Python boolean operations?
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What prefix is used to create a raw string literal in Python?
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What is the length of the string r'x\nx'?
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What is the return value of list.append() in Python?
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What does REPL stand for in Python?
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What is the term for testing individual units of source code?
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What is the smallest testable part of an application?
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Study Notes
Python Functions
-
round(45.8)returns the rounded value of 45.8 -
round(6352.898,2,5)is not a valid syntax for theroundfunction -
round()without arguments is not a valid function call -
round(7463.123,2,1)is not a valid syntax for theroundfunction
Python Data Types
- The
idfunction returns an integer value that is unique for each object - In Python, you do not specify types, it is directly interpreted by the compiler
- The
//operator is used for integer division in Python 3.0 - The
int(..)function is used to type cast a value to an integer
Python Operations
- The
*operator is used for string repetition, not mathematical multiplication - The
+operator is used for string concatenation, not mathematical addition - The
/operator is used for float division, not integer division
Python Syntax
- Indentation is required for Python codes to be executed correctly
- You cannot perform mathematical operations on strings
- The
defkeyword is used to define a function
Python Data Structures
- A list stores values of any data type, including strings and integers
- A dictionary stores values in terms of keys and values
- An array is not a built-in data structure in Python
Python String Operations
- The
printfunction can be used to display strings with newline characters (\n) - Strings can be concatenated using the
+operator - Strings can be repeated using the
*operator
Python Class and Objects
- An object represents an entity in the real world with its identity and behavior
- A class defines an object
- A constructor is used to create an object with assigned values to its members
Python Miscellaneous
- The
truncfunction returns an integer value - The
helpfunction can be used to get details of a function or module - The
dirfunction gives a quick list of defined symbols in Python - Logical connectors are spelled out with letters
- Whitespace indentation affects the meaning of Python code
- Empty string is counted as
Falsein Python boolean operations - A "raw" string literal is prefixed by an
rand passes all characters through without special treatment of backslashes -
REPLstands for Read-Evaluate-Print-Loop - Unit testing is a method by which individual units of source code are tested to determine if they are fit for use
- A unit is the smallest testable part of an application
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Description
Multiple choice questions about Python functions including round and id functions.
