Mastering Python Concepts

What are the main data types available in Python?

• char, array, complex

• list, set, array

• int, float, str, list, tuple, dict, set, bool

• float, string, number

How do you declare a variable in Python?

• variable_name : value

• var variable_name = value

• You declare a variable in Python by using the syntax: variable_name = value.

• let variable_name = value

What is the purpose of an if statement in Python?

• To repeat code multiple times.

• To create a loop for iteration.

• To define a function in Python.

• To execute code conditionally based on a boolean expression.

Explain the difference between for loop and while loop.

• For loop: used for recursion; While loop: used for iteration.

• For loop: executes once; While loop: executes multiple times.

• For loop: fixed iterations; While loop: condition-based iterations.

• For loop: condition-based iterations; While loop: fixed iterations.

What is a function in Python and how is it defined?

• A function in Python is defined using the 'func' keyword.

• A function in Python is defined using the 'def' keyword, followed by the function name and parentheses.

• A function in Python is created by assigning a value to a variable.

• A function in Python is defined with the 'define' keyword.

How can you import a module in Python?

• You can import a module by typing 'include module_name'

• Use the 'import' statement, e.g., 'import module_name'.

• Use the 'require' statement, e.g., 'require(module_name)'

• Import modules using 'load module_name'

What is the purpose of the 'with' statement in file handling?

• To ensure proper management of file resources by automatically closing the file after its block of code is executed.

• To create a new file if it doesn't exist.

• To read the contents of a file without closing it.

• To append data to an existing file without closing it.

How do you read a file line by line in Python?

• Use 'open(filename) as file: read(file)' to read the entire file at once.

• Use 'file.read_lines()' to read all lines in a file.

• Use 'open(filename) and file.readlines()' to get a list of lines.

• Use 'with open(filename) as file: for line in file: process(line)'.

What is the difference between a list and a tuple in Python?

• Lists can contain only numbers, while tuples can contain any data type.

• The main difference is that lists are mutable and tuples are immutable.

• Tuples are created using square brackets, while lists use parentheses.

• Lists are faster than tuples in all operations.

How can you handle exceptions in Python?

• Use if-else statements to handle exceptions.

• Ignore exceptions and continue execution.

• Log exceptions to a file without handling them.

• Use try-except blocks to handle exceptions.