Xalta Technology Services RPA Developer Interview Questions and Answers

Procedural language focuses on procedures and functions, while object-oriented language focuses on objects and classes.

• Procedural language: C, Pascal, BASIC

• Object-oriented language: Java, C++, Python

• Procedural languages are better for small projects, while object-oriented languages are better for large and complex projects

Encapsulation is the concept of bundling data and methods that operate on the data into a single unit. Polymorphism allows objects to be treated as instances of their parent class.

• Encapsulation helps in hiding the internal state of an object and restricting access to it.

• Polymorphism allows objects of different classes to be treated as objects of a common superclass.

• Encapsulation ensures data integrity and prevents unau...read more

Fundamental data types are basic data types provided by a programming language, while derived data types are created by combining fundamental data types.

• Fundamental data types include integers, floating-point numbers, characters, and booleans.

• Derived data types are created by combining fundamental data types, such as arrays, structures, and classes.

• The main difference is that fundamental data types are predefined by th...read more

Linear data types have elements arranged in a sequential order, while non-linear data types do not have elements arranged in a sequential order.

• Linear data types include arrays, linked lists, and queues.

• Non-linear data types include trees and graphs.

• Linear data types have a single path to traverse all elements, while non-linear data types have multiple paths.

Binary Tree is a hierarchical data structure where each node has at most two children. Binary Search Tree is a type of binary tree where the left child is less than the parent and the right child is greater.

• Binary Tree can have any values in any order, while Binary Search Tree follows a specific ordering based on the values.

• In Binary Search Tree, searching for a value is more efficient as it follows a specific order.

• Ex...read more

Yes, I am familiar with various algorithms commonly used in RPA development.

• I am familiar with sorting algorithms like bubble sort, quick sort, and merge sort.

• I have experience with searching algorithms such as linear search and binary search.

• I am knowledgeable about graph algorithms like Dijkstra's algorithm and breadth-first search.

Some sorting algorithms include Bubble Sort, Selection Sort, Insertion Sort, Merge Sort, Quick Sort, and Heap Sort.

• Bubble Sort - repeatedly steps through the list, compares adjacent elements, and swaps them if they are in the wrong order

• Selection Sort - repeatedly finds the minimum element from the unsorted part and swaps it with the first unsorted element

• Insertion Sort - builds the final sorted array one item at a tim...read more

Some searching algorithms include linear search, binary search, depth-first search, and breadth-first search.

• Linear search: Iterates through each element in a list until the desired element is found.

• Binary search: Divides a sorted array in half to determine if the target value is in the lower or upper half.

• Depth-first search: Explores as far as possible along each branch before backtracking.

• Breadth-first search: Explor...read more

Recursion is a programming technique where a function calls itself to solve a problem.

• Recursion is used in scenarios where a problem can be broken down into smaller subproblems of the same type.

• Examples include factorial calculation, Fibonacci sequence generation, and tree traversal.

• Recursion is useful when the problem can be solved by solving a smaller version of the same problem.

RPA stands for Robotic Process Automation, which is the use of software robots to automate repetitive tasks.

• RPA can automate tasks such as data entry, data extraction, form filling, and report generation.

• It can improve efficiency by reducing human errors and speeding up processes.

• RPA is used in various industries like finance, healthcare, and manufacturing.

• Examples of RPA tools include UiPath, Blue Prism, and Automatio...read more

Software Development Life Cycle (SDLC) is a process used by software development teams to design, develop, and test high-quality software.

• Waterfall Model: Sequential approach with distinct phases like requirements, design, implementation, testing, and maintenance.

• Agile Model: Iterative approach with continuous feedback and collaboration between cross-functional teams.

• Spiral Model: Combination of iterative and waterfall...read more

Product life cycle refers to stages a product goes through from introduction to withdrawal, while software life cycle refers to stages a software goes through from development to retirement.

• Product life cycle includes introduction, growth, maturity, and decline stages.

• Software life cycle includes planning, development, testing, deployment, and maintenance stages.

• Product life cycle focuses on physical products, while so...read more

Classes in programming provide a way to organize and structure code by grouping related data and functions together.

• Classes help in organizing code by grouping related data and functions together

• Encapsulation allows for data hiding and protection

• Inheritance enables code reusability and promotes the DRY (Don't Repeat Yourself) principle

• Polymorphism allows for flexibility and extensibility in code design

Version controlling is a system that records changes to a file or set of files over time so that you can recall specific versions later.

• Version controlling helps in tracking changes made to code or files over time.

• It allows multiple developers to work on the same project without interfering with each other's work.

• It helps in reverting back to previous versions of code in case of errors or bugs.

• Popular version controlli...read more

I am comfortable with Python as a programming language.

• Python is known for its simplicity and readability, making it a popular choice for developers.

• It has a large standard library and community support, making it easy to find resources and solutions.

• Python is versatile and can be used for web development, data analysis, automation, and more.

Interpreted languages are executed line by line while compiled languages are translated into machine code before execution.

• Interpreted languages are executed line by line, translating and executing code simultaneously

• Compiled languages are translated into machine code before execution, resulting in faster performance

• Examples of interpreted languages: Python, JavaScript, Ruby

• Examples of compiled languages: C, C++, Java

Interpreted languages are used for their flexibility, ease of debugging, and platform independence.

• Interpreted languages are easier to read and write compared to compiled languages.

• They allow for dynamic typing, making it easier to work with different data types.

• Interpreted languages are platform independent, meaning the code can run on any system with the interpreter installed.

• Debugging is easier in interpreted langua...read more

Tuple is immutable and fixed in size, while list is mutable and can be resized.

• Tuple is defined using parentheses, while list is defined using square brackets.

• Tuple elements can be of different data types, while list elements can be of the same or different data types.

• Tuple is faster than list for iteration and accessing elements.

• Example: tuple = (1, 'a', True), list = [1, 'a', True]

Different types of joins include inner join, outer join, left join, and right join.

• Inner join: Returns rows when there is a match in both tables.

• Outer join: Returns all rows when there is a match in one of the tables.

• Left join: Returns all rows from the left table and the matched rows from the right table.

• Right join: Returns all rows from the right table and the matched rows from the left table.

Inner join will have more number of rows compared to outer join.

• Inner join returns only the matching rows between two tables

• Outer join returns all rows from one table and matching rows from the other table

• Example: If Table A has 10 rows and Table B has 8 rows, inner join will have maximum 8 rows while outer join can have maximum 10 rows

Find the missing and duplicated numbers in an array of strings.

• Convert the array of strings to integers for easier manipulation.

• Calculate the sum of all numbers in the array and compare it to the sum of numbers from 1 to n, where n is the length of the array.

• The difference between the two sums will give you the missing number.

• To find the duplicated number, keep track of the frequency of each number in a hashmap.