Altimetrik Software Developer Interview Questions and Answers

Reverse a string without using any inbuilt method.

• Iterate through the string from the last character to the first

• Create a new string and append each character to it

• Return the reversed string

Convert a smallcased string to all capital case.

• Use the toUpperCase() method to convert the string to uppercase.

• Assign the result to a new variable or overwrite the original string.

• Make sure to handle any non-alphabetic characters appropriately.

Hashmap is a data structure that stores key-value pairs and uses hashing to retrieve values quickly.

• Hashmap uses an array to store the key-value pairs

• The keys are hashed to generate an index in the array

• If two keys hash to the same index, a linked list is used to store the values

• Retrieving a value involves hashing the key to find the index and then traversing the linked list if necessary