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Use case task for coding round
Build app screen of weather app
I appeared for an interview in May 2021.
I applied via Internshala and was interviewed before Sep 2021. There were 2 interview rounds.
I applied via Recruitment Consultant and was interviewed in May 2020. There were 3 interview rounds.
Diameter of a binary tree is the longest path between any two leaf nodes.
Calculate the height of left and right subtrees recursively.
Calculate the diameter recursively using the formula max(left_height + right_height + 1, max(left_diameter, right_diameter)).
Return the maximum diameter.
To find interchanged terms from an AP series
Identify the common difference between terms
Swap the positions of adjacent terms
Check if the new series is also an AP
Repeat until no more interchanged terms can be found
Database indexing is a technique to improve the performance of database queries.
Indexing creates a data structure that allows for faster retrieval of data.
Indexes are created on one or more columns of a table.
Queries that use indexed columns can be executed faster.
Indexes can be clustered or non-clustered.
Clustered indexes determine the physical order of data in a table.
Non-clustered indexes create a separate structure...
I applied via Campus Placement and was interviewed before May 2021. There were 2 interview rounds.
Will be given Requirement to write code for Restraunt. Based on that have write code for delivering orders by delivery boys.
I applied via Naukri.com and was interviewed in Mar 2021. There was 1 interview round.
I appeared for an interview before Jan 2023.
I applied via Company Website and was interviewed in Dec 2021. There were 3 interview rounds.
LRU caching is a technique to store frequently used data in cache memory to improve performance.
LRU stands for Least Recently Used.
It removes the least recently used item from the cache when the cache is full.
It uses a doubly linked list and a hash map to implement the cache.
When an item is accessed, it is moved to the front of the list.
When the cache is full, the item at the end of the list is removed.
Example: Java Li...
Producer-consumer problem involves synchronization between threads to avoid race conditions.
Producer produces data and adds it to a shared buffer
Consumer consumes data from the shared buffer
Synchronization is required to avoid race conditions
Code example: https://www.geeksforgeeks.org/producer-consumer-solution-using-threads-in-java/
To check if a tree is a BST or not.
Traverse the tree in-order and check if the values are in ascending order.
For each node, check if its value is greater than the maximum value of its left subtree and less than the minimum value of its right subtree.
Recursively check if the left and right subtrees are also BSTs.
Reverse a single linked list.
Iterate through the list and change the direction of the pointers
Keep track of the previous, current and next nodes
Set the head of the list to the last node after reversing
Print all anagrams of same type in same line from array of Strings
Create a HashMap with sorted string as key and list of anagrams as value
Iterate through array and add each string to corresponding list in HashMap
Print all values in HashMap
Java 8 introduced lambda expressions, functional interfaces, streams, and default methods.
Lambda expressions allow functional programming in Java.
Functional interfaces are interfaces with a single abstract method.
Streams provide a way to process collections of data in a functional way.
Default methods allow interfaces to have implementation.
Date and Time API improvements.
Nashorn JavaScript engine added.
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