HashedIn by Deloitte Interview Questions, Process, and Tips

Count occurrence of element in an array of strings

• Use a loop to iterate through the array

• Use a dictionary to store the count of each element

• Increment the count for each element encountered

System design for the game of Snake and Ladder

• Create a board with 100 cells and mark the positions of snakes and ladders

• Implement a player class with a current position on the board

• Roll a dice to move the player and check for snakes and ladders

• Keep track of player scores and winner at the end of the game

Code to find max length subarray matching the given sum

• Use a sliding window approach to iterate through the array

• Keep track of the current sum and the maximum length subarray

• If the current sum exceeds the given sum, move the window's left pointer

• If the current sum matches the given sum, update the maximum length subarray

• Return the maximum length subarray

CLI snake and ladders game code

• Create a board with 100 cells using a 10x10 array

• Define snakes and ladders positions as an array of tuples

• Use a loop to alternate player turns and move them based on dice roll

• Check for snakes and ladders and update player position accordingly

• Print the board after each turn and declare winner when a player reaches cell 100

SQL query to retrieve output from given tables

• Identify the tables and their relationships

• Determine the columns to be selected

• Use appropriate join and filter conditions

• Group and aggregate data if required

Method overloading is having multiple methods with the same name but different parameters. Method overriding is having a subclass method with the same name and parameters as a superclass method.

• Method overloading is used to provide different ways of calling the same method with different parameters.

• Method overriding is used to provide a specific implementation of a method in a subclass that is already defined in a supe...read more

Variable declaration in JavaScript

• Use 'var', 'let', or 'const' to declare variables

• Variables declared with 'var' have function scope

• Variables declared with 'let' or 'const' have block scope

• Variables declared with 'const' cannot be reassigned

• Use descriptive variable names