Functional

What is a lambda function in functional programming? a) A function with no arguments b) An anonymous function defined without a name c) A function that performs I/O operations d) A function with global scope Answer: b) An anonymous function defined without a name Explanation: A lambda function is an anonymous function that is defined […]

What is the primary benefit of using functional programming? a) It increases the complexity of the code b) It encourages immutability, making code easier to reason about and test c) It encourages side effects d) It allows frequent modification of global variables Answer: b) It encourages immutability, making code easier to reason about and test

In functional programming, what does “partial application” mean? a) Applying a function to all arguments at once b) Applying a function to some arguments and returning a new function for the remaining arguments c) Applying a function conditionally d) Using mutable state in functions Answer: b) Applying a function to some arguments and returning a

What does “composition” refer to in functional programming? a) The use of inheritance between classes b) Combining two or more functions to form a new function c) Defining functions inside a loop d) Modifying the global state Answer: b) Combining two or more functions to form a new function Explanation: Function composition in functional programming

Which of the following is a feature of functional programming? a) Mutable state b) Inheritance c) First-class functions d) Imperative loops Answer: c) First-class functions Explanation: First-class functions are a key feature of functional programming, meaning functions can be treated like any other value and passed around as arguments or returned from other functions. Reference:

What does the reduce function do in functional programming? a) Increases the size of a list b) Transforms a list into a single value by applying a function cumulatively c) Sorts elements in ascending order d) Maps elements to their index Answer: b) Transforms a list into a single value by applying a function cumulatively

What is “lazy evaluation” in functional programming? a) A function that runs slower than expected b) An evaluation strategy where expressions are evaluated only when their value is needed c) A method of memorizing function calls d) A technique to create recursive loops Answer: b) An evaluation strategy where expressions are evaluated only when their

In functional programming, what does the map function do? a) Transforms each element in a list using a function and returns a new list b) Filters out elements from a list c) Sorts the elements in a list d) Modifies the original list in place Answer: a) Transforms each element in a list using a

Which of the following is an example of a higher-order function? a) A function that takes a string as input b) A function that returns a number c) A function that takes another function as an argument d) A function that modifies global variables Answer: c) A function that takes another function as an argument

In functional programming, which statement is true about loops? a) Loops are commonly used b) Loops are replaced with recursion or higher-order functions like map or reduce c) Loops modify global state d) Loops are used to introduce side effects Answer: b) Loops are replaced with recursion or higher-order functions like map or reduce Explanation:

What is “currying” in functional programming? a) Transforming a function so that it takes multiple arguments into a sequence of functions, taking one argument b) A technique to modify a function’s behavior c) The process of memoization d) Recursion on multiple arguments Answer: a) Transforming a function so that it takes multiple arguments into a

Which of the following is discouraged in functional programming? a) Immutable data b) Side effects c) Higher-order functions d) Pure functions Answer: b) Side effects Explanation: Side effects, such as modifying global variables or performing I/O operations, are discouraged in functional programming because they can make the behavior of programs less predictable. Reference: Functional Programming

What is “referential transparency” in functional programming? a) The ability to reference global variables b) When a function consistently yields the same result given the same inputs c) A property of functions that return nothing d) The use of object-oriented features in functions Answer: b) When a function consistently yields the same result given the

Which of the following is a common functional programming language? a) Python b) Java c) Haskell d) HTML Answer: c) Haskell Explanation: Haskell is a purely functional programming language known for its strong support for immutability and higher-order functions. Reference: Functional Programming Quiz – MCQ Questions and Answers

What is “recursion” in functional programming? a) A function that calls itself b) A function that modifies a global variable c) A loop that repeats until a condition is met d) A function that runs indefinitely Answer: a) A function that calls itself Explanation: Recursion is a technique in which a function calls itself to

In functional programming, what is a “side effect”? a) A function that returns a value b) A change in the system’s state or interaction with the outside world during function execution c) A function with no return value d) A function that never terminates Answer: b) A change in the system’s state or interaction with

What is a higher-order function? a) A function that returns the maximum value b) A function that takes another function as an argument or returns a function c) A function that runs indefinitely d) A function that uses global variables Answer: b) A function that takes another function as an argument or returns a function

Which of the following is a key feature of functional programming? a) Object inheritance b) Mutable state c) Higher-order functions d) Imperative loops Answer: c) Higher-order functions Explanation: Higher-order functions are functions that take other functions as arguments or return them as results, which is a fundamental feature of functional programming. Reference: Functional Programming Quiz

What does “immutability” mean in functional programming? a) Data cannot be changed after it is created b) Variables can be modified freely c) Data is mutable but can only be changed by one function d) Only functions are immutable Answer: a) Data cannot be changed after it is created Explanation: Immutability means that once data

What is a pure function in functional programming? a) A function that depends on external variables b) A function that always produces the same output for the same input and has no side effects c) A function that modifies the global state d) A function that does not return a value Answer: b) A function