ALTRES Technologies Payroll Analyst 1 Interview Questions and Answers

Identify anagrams within a given sentence

• Split the sentence into individual words

• Compare each word to every other word to find anagrams

• Store anagrams in an array of strings

The lowest common ancestor (LCA) of a binary tree is the shared ancestor of two nodes farthest from the root.

• Start from the root and recursively search for the nodes in the left and right subtrees.

• If one node is found in the left subtree and the other in the right subtree, then the root is the LCA.

• If both nodes are found in the left subtree, then the LCA is in the left subtree. Same for the right subtree.

• Repeat the pro

Use a hash set to find duplicates in a string efficiently.

• Create a hash set to store characters as you iterate through the string.

• If a character is already in the hash set, it is a duplicate.

• Return the duplicates as an array of strings.

To find the sum of digits in reverse order, reverse the number and then add the digits together.

• Reverse the given number

• Separate each digit of the reversed number

• Add all the digits together to get the sum

Black box testing is a software testing method where the internal workings of the system are not known to the tester.

• Testing based on external behavior and inputs without knowledge of internal code

• Focuses on testing functionality without looking at the code implementation

• Helps in identifying issues that may not be apparent from a code review

• Examples: User interface testing, system integration testing

Lazy loading in React is a technique used to improve performance by loading components only when they are needed.

• Lazy loading helps reduce initial load time by splitting the code into smaller chunks.

• React.lazy() and Suspense are commonly used for lazy loading in React.

• Lazy loading is especially useful for large applications with many components.

The difference between == and === is that == checks for equality after type coercion, while === checks for equality without type coercion.

• == is a loose equality operator that performs type coercion before comparing two values.

• === is a strict equality operator that does not perform type coercion before comparing two values.

• Example: 1 == '1' will return true, but 1 === '1' will return false.

Model represents data, View displays data to user, Controller handles user input and updates model/view

• Model: Represents data and business logic

• View: Displays data to user

• Controller: Handles user input and updates model/view

• Example: In a web application, model could be a database table, view could be an HTML page, and controller could be a server-side script

Steps to create a request object

• Define the request object class

• Add properties to the request object class

• Implement methods to set and get values of the properties

• Instantiate the request object class

• Set values for the properties of the request object