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Python Programming - Lambda Functions

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Exercise : Lambda Functions - General Questions
  • Lambda Functions - General Questions
1.
What is the primary purpose of using lambda functions?
To create anonymous functions
To define functions with multiple parameters
To execute code asynchronously
To create class methods
Answer: Option
Explanation:
lambda functions are used to create small, anonymous functions without the need to formally define them using the def keyword. They are often used for short-term, specific tasks where a full function definition is not necessary.
2.
How is the syntax of a lambda function different from a regular function?
Lambda functions use the keyword lambda, regular functions use def
Lambda functions must have a return statement, regular functions may not
Lambda functions can have multiple expressions, regular functions cannot
Lambda functions require parentheses around parameters, regular functions do not
Answer: Option
Explanation:
Lambda functions are defined using the lambda keyword, while regular functions are defined using the def keyword.
3.
What happens if a lambda function is assigned to a variable but not called immediately?
It raises a syntax error
It is stored as a reference to the function and can be called later
It automatically executes the function
It requires parentheses to be called later
Answer: Option
Explanation:
Assigning a lambda function to a variable allows you to store it as a reference for later use. It doesn't automatically execute when assigned.
4.
Which of the following statements about lambda functions is correct?
Lambda functions can have named parameters
Lambda functions cannot be used in conjunction with higher-order functions
Lambda functions support multiple lines of code
Lambda functions are always more efficient than regular functions
Answer: Option
Explanation:
Lambda functions can have named parameters, just like regular functions, allowing for greater flexibility in their usage.
5.
In Python, what is the purpose of the filter() function when used with lambda functions?
To apply the lambda function to each element of an iterable
To create a filter object based on the lambda function's condition
To sort the elements of an iterable using the lambda function
To map the lambda function to each element of an iterable
Answer: Option
Explanation:
The filter() function is used to create a filter object that includes only the elements from an iterable for which the lambda function returns True.
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