10+ KARNAL FREIGHT Interview Questions and Answers

Arrange a Linked List into Positive and Negative Nodes Alternately

• Traverse the Linked List and separate positive and negative nodes into two separate lists

• Merge the two lists alternately to form the final arrangement

• Ensure to handle cases where one list is longer than the other

Currently using a tech stack consisting of Java, Spring Boot, React, and PostgreSQL.

• Java

• Spring Boot

• React

• PostgreSQL

Tech debt should be managed by prioritizing, tracking, and addressing it regularly.

• Prioritize tech debt based on impact on product, codebase, and team productivity.

• Track tech debt using tools like Jira or Trello to ensure visibility and accountability.

• Address tech debt incrementally by allocating time in sprints or dedicated tech debt cleanup sprints.

• Involve the team in identifying and addressing tech debt to foster a culture of continuous improvement.

DB indexing is a technique used to improve the performance of database queries by creating data structures that allow for faster data retrieval.

• Indexes are created on specific columns in a database table to speed up data retrieval.

• When a query is executed, the database engine uses the index to quickly locate the rows that match the query criteria.

• Types of indexes include clustered, non-clustered, unique, and composite indexes.

• Regularly updating statistics and maintaining inde...read more

I have 5 years of experience leading technical teams, handling team dynamics, delegating tasks, and resolving conflicts.

• Led a team of 10 developers in a software development project, ensuring timely delivery and quality output

• Managed team members with diverse skill sets, assigning tasks based on individual strengths and weaknesses

• Resolved conflicts within the team by facilitating open communication and finding mutually agreeable solutions

LRU Cache is a data structure that stores the most recently used items, discarding the least recently used items when full.

• Use a combination of a doubly linked list and a hashmap to implement LRU Cache efficiently.

• Keep track of the most recently used item by moving it to the front of the linked list.

• When the cache is full, remove the least recently used item from the end of the linked list and the hashmap.

• Ensure constant time complexity for both get and put operations.

Authentication is the process of verifying the identity of a user, while authorization is the process of granting access to specific resources.

• Authentication ensures that the user is who they claim to be, usually through credentials like username and password.

• Authorization determines what actions a user is allowed to perform on a system or resource.

• Coroutines are lightweight threads that allow for asynchronous programming in a more sequential and structured manner.

• Coroutines ...read more

Design a feature for an app

• Identify the purpose and goals of the feature

• Define the user flow and interactions

• Consider the technical requirements and constraints

• Design the UI/UX

• Plan the data model and storage

• Consider scalability and performance

• Implement and test the feature