100+ Ninja Interview Questions and Answers

Courses in Coursera and NPTEL provide knowledge and skills in various fields.

• Courses in Coursera and NPTEL offer a wide range of topics to learn from.

• They provide access to high-quality education from top universities and institutions.

• The courses help in developing new skills and enhancing existing ones.

• They can be useful for career advancement and personal growth.

• For example, a course in data science can help in analyzing and interpreting data for business decisions.

• Similarl...read more

Yes, it is a software project. We used multiple languages including Python, Java, and C++.

• The project involved developing a web application using Python and Django framework.

• We also used Java for developing the backend of the application.

• C++ was used for developing some of the algorithms used in the project.

• Other technologies used include HTML, CSS, and JavaScript.

• We followed agile methodology for development and used Git for version control.

Neural networks are a type of machine learning algorithm inspired by the structure and function of the human brain.

• Neural networks consist of layers of interconnected nodes that process information.

• They are trained on a dataset to learn patterns and make predictions.

• They can be used for tasks such as image recognition, natural language processing, and predictive analytics.

• Examples include convolutional neural networks for image classification and recurrent neural networks for...read more

Program to find the nth term in a given series.

• The series follows a pattern of even and odd numbers multiplied by the position of the term.

• Use a loop to generate the series and return the nth term.

• For n=5, the output should be 4.

It could be either my fault or the PC's fault depending on the circumstances.

• If the application was designed to run on a specific operating system or hardware configuration and the PC does not meet those requirements, it would be the PC's fault.

• If the application has bugs or errors in the code, it would be my fault.

• If the PC has outdated software or hardware that cannot support the application, it would be the PC's fault.

• If the application requires certain settings or configu...read more

My favorite programming language is Python, and I am also comfortable using Java, C++, and JavaScript.

• Favorite language: Python

• Comfortable using: Java, C++, JavaScript

Abstraction is the process of hiding complex details and showing only essential features.

• Abstraction helps in reducing complexity and increasing efficiency.

• It allows us to focus on the important aspects of an object or system.

• For example, a car can be abstracted as a mode of transportation with certain features like speed, fuel efficiency, and safety.

• Abstraction can be achieved through encapsulation and inheritance in object-oriented programming.

Use mathematical logic to reduce the size of a given string.

• Consider using compression algorithms like Huffman coding or Lempel-Ziv-Welch.

• Look for patterns or repetitions in the string that can be represented more efficiently.

• Consider using mathematical formulas or equations to represent the string.

Cloud computing is the delivery of computing services over the internet.

• Cloud computing allows users to access data and applications from anywhere with an internet connection.

• There are three main models of cloud computing: Infrastructure as a Service (IaaS), Platform as a Service (PaaS), and Software as a Service (SaaS).

• IaaS provides virtualized computing resources, such as servers and storage, over the internet.

• PaaS provides a platform for developers to build and deploy appl...read more

Lists are mutable while tuples are immutable in Python.

• Lists use square brackets [] while tuples use parentheses ().

• Elements in a list can be added, removed, or modified while elements in a tuple cannot be modified.

• Lists are used for collections of data that need to be modified while tuples are used for collections of data that should not be modified.

• Example of a list: my_list = [1, 2, 3]

• Example of a tuple: my_tuple = (1, 2, 3)

OOP is a programming paradigm based on the concept of objects, which can contain data in the form of fields and code in the form of procedures.

• Encapsulation: Objects can encapsulate data and behavior within a single unit.

• Inheritance: Objects can inherit attributes and methods from parent classes.

• Polymorphism: Objects can take on multiple forms and behave differently based on their specific type.

SDLC stands for Software Development Life Cycle. Waterfall and Agile are two different approaches to SDLC.

• SDLC is a process followed by software development teams to design, develop, and test high-quality software.

• Waterfall is a linear approach where each phase of the SDLC must be completed before moving on to the next phase.

• Agile is an iterative approach where the development team works in short sprints to deliver working software quickly and continuously improve it.

• Waterfal...read more

Code to capitalize first and last letter of each word into uppercase.

• Split the string into words using split() method

• Loop through each word and capitalize the first and last letter using slice() and toUpperCase() methods

• Join the modified words back into a string using join() method

public static void main is the entry point of a Java program.

• It is a method that is called when the program starts.

• It must be declared as public, static, and void.

• It takes an array of strings as an argument.

• It is where the program's execution begins.

• Example: public static void main(String[] args) { }

The Sieve of Eratosthenes is an optimized algorithm to generate prime numbers.

• Use the Sieve of Eratosthenes algorithm to efficiently generate prime numbers.

• Start by creating a list of numbers from 2 to n, where n is the maximum number you want to check for primes.

• Iterate through the list and mark multiples of each number as non-prime.

• The remaining unmarked numbers are prime.

• Example: For n=10, the prime numbers generated are 2, 3, 5, 7.

Some popular products of TATA include Tata Salt, Tata Tea, Tata Motors vehicles, Tata Steel, and Tata Consultancy Services.

• Tata Salt

• Tata Tea

• Tata Motors vehicles

• Tata Steel

• Tata Consultancy Services

The sorting algorithm for finding the gist of reviews on an e-commerce website can be based on sentiment analysis and keyword extraction.

• Use sentiment analysis to categorize reviews as positive, negative, or neutral.

• Extract keywords from reviews to identify common themes or topics.

• Sort reviews based on relevance to the product or service being reviewed.

• Consider using algorithms like TF-IDF or LDA for topic modeling.

To solve a hardware issue in speakers of a laptop, I would first check the sound settings and update the drivers. If that doesn't work, I would open up the laptop and check the connections and replace the speakers if necessary.

• Check sound settings and update drivers

• Open up laptop and check connections

• Replace speakers if necessary

I would check the power source, battery, and hardware components.

• Check if the laptop is properly plugged in and the power source is working.

• Remove the battery and try turning on the laptop with just the power cord.

• Check if any hardware components are loose or damaged, such as the RAM or hard drive.

• Try resetting the laptop by holding down the power button for 10-15 seconds.

• If none of these steps work, seek professional help or contact the manufacturer for support.

I created a mobile app that helps users track their daily water intake and reminds them to stay hydrated.

• The app allows users to set daily water intake goals based on their weight and activity level.

• Users can log their water consumption throughout the day and receive notifications to drink more water if they are falling behind.

• The app also provides visual representations of their daily water intake to help users stay motivated.

• To sell the app in the market, I would highlight ...read more

Answers to technical questions related to open loop and closed loop systems, air conditioning, object, and data member access in derived classes.

• Open loop system is a system where the output is not controlled by the input, while closed loop system is a system where the output is controlled by the input.

• Air conditioning system is a closed loop system as it maintains a constant temperature by adjusting the input based on the output.

• An object is an instance of a class that has i...read more

Use the os module to delete a file in Python.

• Import the os module

• Use os.remove() function to delete the file

• Provide the file path as argument to os.remove() function

The static keyword in programming is used to declare variables, methods, or classes that belong to the class itself rather than instances of the class.

• Static variables are shared among all instances of a class and can be accessed without creating an object of the class.

• Static methods can be called without creating an instance of the class.

• Static classes cannot be instantiated and are used to group related methods and variables together.

An array is a collection of similar data types stored in contiguous memory locations. A pointer is a variable that stores the memory address of another variable.

• Arrays are accessed using index numbers, while pointers are accessed using the * and & operators.

• Arrays can be passed to functions as arguments, while pointers can be used to pass the address of a variable to a function.

• Arrays can be initialized with values at the time of declaration, while pointers need to be assigne...read more

I am most proficient in Python, rating myself a 4.5 for its versatility in data analysis, web development, and automation tasks.

• Extensive experience with libraries like Pandas and NumPy for data manipulation.

• Developed web applications using Flask and Django frameworks.

• Automated repetitive tasks using Python scripts, improving efficiency.

• Participated in open-source projects, contributing to community-driven software.

Query to print the salary of employees whose names start with 'A'.

• Use the SELECT statement to retrieve the 'salary' column from the 'employees' table.

• Use the WHERE clause with the LIKE operator to filter employees whose names start with 'A'.

• The query would look like: SELECT salary FROM employees WHERE name LIKE 'A%';

I am proficient in C++, Java, and Python, but my language of preference is Python.

• Proficient in C++, Java, and Python

• Prefer Python for its readability and versatility

• Examples: C++ for performance-critical tasks, Java for Android development, Python for data analysis