Parker Hannifin Interview Questions and Answers

Use sliding window technique to find minimum length substring with sum >= target.

• Initialize two pointers at start of string

• Expand window by moving right pointer until sum >= target

• Shrink window by moving left pointer while updating minimum length

• Repeat until end of string is reached

The index of the first occurrence where a pattern string matches with a text string.

• Use string searching algorithms like Knuth-Morris-Pratt or Boyer-Moore for efficient pattern matching.

• Iterate through the text string and check for matches with the pattern string.

• Return the index of the first occurrence where the pattern matches with the text.

Implement a persistence stack with constant time operations

• Use a combination of a stack and a hashmap to achieve constant time operations for push, pop, and get operations

• Maintain a stack to store the elements and a hashmap to store the index of each element in the stack

• When pushing an element, add it to the stack and update its index in the hashmap

• When popping an element, remove it from the stack and also remove its index from the hashmap

• For get operation, retrieve the eleme...read more

Finding the median of two sorted arrays and discussing OOPs basics

• To find the median of two sorted arrays, merge the arrays and then calculate the median

• OOPs basics include concepts like encapsulation, inheritance, polymorphism, and abstraction

• Example: Median of [1, 3] and [2] is 2.0

A library for API testing that provides a set of functions and utilities to simplify the testing process.

• The library should have functions to send HTTP requests and validate responses.

• It should support different authentication methods like OAuth, JWT, etc.

• The library should handle common API testing scenarios like testing CRUD operations, handling different HTTP methods, etc.

• It should provide utilities for data-driven testing, allowing testers to easily parameterize and itera...read more

Load balancing is a technique used to distribute network traffic across multiple servers to ensure optimal performance and availability.

• Types of load balancing include: round robin, least connections, IP hash, and weighted round robin.

• Round robin distributes traffic evenly across servers in a sequential manner.

• Least connections directs traffic to the server with the fewest active connections.

• IP hash uses the client's IP address to determine which server to send traffic to.

• Wei...read more

Promises in JavaScript are objects representing the eventual completion or failure of an asynchronous operation.

• Promises help in handling asynchronous operations in a more organized manner.

• They can be in three states: pending, fulfilled, or rejected.

• Promises can be chained using .then() method to handle success and failure cases.

• They can also be used with async/await for more readable asynchronous code.