Lava International Interview Questions and Answers

To find the highest element in a BST, perform a right traversal until reaching the rightmost leaf node.

• Perform a right traversal starting from the root node until reaching the rightmost leaf node to find the highest element.

• Implement the insertion operation by comparing the value to be inserted with each node and traversing left or right accordingly.

• Ensure that the BST property is maintained during insertion by placing smaller values to the left and larger values to the right...read more

Explain the basics of Java in a simple and practical way, focusing on hands-on examples and real-world applications.

• Start by explaining the basic syntax and structure of Java code

• Use simple examples to demonstrate concepts like variables, loops, and functions

• Show how Java is used in real-world applications, such as building websites or mobile apps

Generate all permutations of a given number without duplicates

• Use backtracking to generate all possible permutations

• Avoid duplicates by keeping track of used digits

• Recursively swap digits to generate permutations

To delete the nth element from the end in a LinkedList, we can use two pointers approach.

• Use two pointers - one to traverse the list and another to keep track of the nth element from the end.

• Calculate the distance between the two pointers and delete the node at the second pointer.

Memory management is the process of controlling and coordinating computer memory, assigning portions called blocks to various running programs.

• Memory allocation - assigning memory blocks to programs as needed

• Memory deallocation - releasing memory blocks when no longer needed

• Memory fragmentation - the division of memory into small blocks leading to inefficient use

• Memory leaks - when a program fails to release memory after use, causing memory to be unavailable for other program...read more

Heap Sort is a comparison-based sorting algorithm that uses a binary heap data structure.

• Heap Sort involves building a max heap from the input array, then repeatedly removing the maximum element and rebuilding the heap.

• The time complexity of Heap Sort is O(n log n) in the worst case scenario.

• Example: Given an array [4, 10, 3, 5, 1], after applying Heap Sort, the sorted array would be [1, 3, 4, 5, 10].

Detect cycle in directed graph using depth-first search algorithm.

• Use depth-first search (DFS) algorithm to traverse the graph.

• Maintain a visited set to keep track of visited nodes.

• If a node is visited again during traversal, there is a cycle in the graph.