Understanding Recursion and Iteration

Front

What is iteration in programming?

Back

Iteration is the repetition of a block of code in programming.

Front

Krish is trying to understand how recursive functions work. Can you give him an example of a recursive function?

Back

function factorial(n) { return n <= 1 ? 1 : n * factorial(n - 1); }

Front

Rahul is trying to calculate the number of ways he can arrange his books on a shelf. What is a common use case for recursion in this scenario?

Back

Calculating factorials or traversing tree structures.

Front

Siya is organizing a charity event and needs to process the list of volunteers who signed up. What is a common use case for iteration in this scenario?

Back

Processing elements in a list or array.

Front

How does recursion work in a function?

Back

Recursion works by a function calling itself with a base case to terminate and a recursive case to break down the problem.

Front

How does iteration work in a loop?

Back

Iteration in a loop works by executing a block of code repeatedly based on a condition.

Front

What is a base case in recursion?

Back

A base case is a condition in recursion that stops further recursive calls.

Front

What is a loop in iteration?

Back

A loop in iteration is a construct that repeats code execution until a condition is satisfied.

Front

Ishaan is trying to solve a complex problem by repeatedly breaking it down into smaller parts. However, he realizes that if he keeps doing this without a proper stopping condition, he might run into issues. Which method can lead to stack overflow if not handled properly?

Back

Recursion

Front

Ishika is trying to solve a problem using a simple recursive function. What is the time complexity of her approach?

Back

O(n) for linear recursion, O(2^n) for exponential recursion.