Propeltech Labs India Interview Questions and Answers

Program to print Christmas tree with 8 and 4 stars

• Use loops to print the tree structure

• For 8 stars tree, use 4 rows and for 4 stars tree, use 3 rows

• Print spaces before and after the stars to align them properly

Save the prisoner program in Java

• Take input for number of prisoners, number of sweets and starting prisoner

• Calculate the index of the last prisoner to receive a sweet using modulo operator

• Handle edge cases where the last prisoner is the starting prisoner

• Implement the program using loops and conditional statements

SQL is a programming language used to manage and manipulate relational databases.

• SQL stands for Structured Query Language.

• It is used to create, modify, and query databases.

• Example query: SELECT * FROM customers WHERE city='New York';

A class is a blueprint for creating objects, while an object is an instance of a class.

• A class defines the properties and methods that objects of that class will have.

• An object is created from a class using the 'new' keyword.

• Objects can have unique values for their properties, while still sharing the same methods as other objects of the same class.

• Example: A class 'Car' might have properties like 'make', 'model', and 'year', and methods like 'startEngine' and 'stopEngine'. An...read more

Python is a high-level, interpreted programming language known for its simplicity, readability, and versatility.

• Python is used for web development, data analysis, artificial intelligence, scientific computing, and more.

• It has a large standard library and supports multiple programming paradigms.

• Python code is often shorter and easier to read than other languages.

• It uses indentation to indicate code blocks instead of curly braces or keywords.

• Python is open-source and has a stro...read more

JavaScript is a programming language used to create interactive web pages and web applications.

• JavaScript is a client-side scripting language

• It is used to add interactivity to web pages

• It can be used for form validation, creating animations, and more

• JavaScript can also be used on the server-side with Node.js