Xalta Technology Services 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

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

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.

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

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

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.