Kaleidofin Software Development Engineer II Interview Questions and Answers

It was a simple assignment where you needed to implement a Django app from a well laid out documentation.

Q1. Binary Search Tree - Two nodes are swapped in a Binary Search tree and then fix them so that the tree becomes a valid BST
Ans. 
Fix two swapped nodes in a Binary Search Tree to make it valid
• Identify the two nodes that are swapped incorrectly

• Perform an inorder traversal to find the nodes that are not in ascending order

• Swap the values of the incorrectly swapped nodes to fix the BST
Answered by AI
Add your answer

Q1. Technical question regarding js
Add your answer

Q1. They concentrate on Core java
Add your answer
Q2. 1. Polymorphism 2. Strings 3. hashMap implementation
Add your answer

Q1. What is useState in react?
Ans. 
useState is a hook in React that allows functional components to have state.
• useState is used to declare state variables in functional components.

• It returns an array with two values: the current state value and a function to update it.

• The initial state can be passed as an argument to useState.

• Example: const [count, setCount] = useState(0);
Answered by AI
Add your answer
Q2. What is useEffect in react?
Ans. 
useEffect is a hook in React that allows you to perform side effects in functional components.
• It replaces componentDidMount, componentDidUpdate, and componentWillUnmount.

• It takes two arguments: a function that performs the side effect and an array of dependencies.

• The function is called after every render, unless the dependencies haven't changed.

• Common use cases include fetching data, setting up event listeners, and upd
Answered by AI
Add your answer
Q3. Given a react problem and tell me to find the bug over there.
Ans. 
To find a bug in a React problem
• Check the console for any error messages

• Use React Developer Tools to inspect the component tree and state

• Check if the props and state are being updated correctly

• Check if the lifecycle methods are being called in the correct order

• Check if the event handlers are bound correctly

• Check if the JSX syntax is correct
Answered by AI
Add your answer
Q4. Ask about basic JS questions.
Add your answer
Q5. Ask about basic CSS ideas.
Add your answer

Q1. There was a total of 5 rounds, where 4 rounds were technical-based only (VP round is included) and the final round with the co-founder only which is similar to the HR or managerial round.
Add your answer

Q1. An medium level hld question
Add your answer

- There were 2 had questions majorly about DP, code link was shared.