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

Shifting to software side can open up new career opportunities and provide job security in a growing industry.

• Software industry is growing rapidly and has a high demand for skilled professionals

• Learning software skills can enhance your resume and make you more marketable

• Software jobs often offer higher salaries and better job security compared to other industries

• There are many resources available for learning software skills, such as online courses and coding bootcamps

• Example...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.

A function to find minimum and maximum values in an array using pointer parameters.

• Declare two variables to hold minimum and maximum values

• Loop through the array and compare each element with the current minimum and maximum values

• Update the minimum and maximum values accordingly

• Return the minimum and maximum values

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.

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)

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

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) { }

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.

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.

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

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

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

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

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.

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

Artificial intelligence is the broader concept of machines being able to carry out tasks in a way that we would consider 'smart', while machine learning is a subset of AI that allows machines to learn from data without being explicitly programmed.

• AI is the broader concept of machines simulating human intelligence, while machine learning is a subset of AI that focuses on the development of computer programs that can access data and use it to learn for themselves.

• AI can be appl...read more

Program using runtime polymorphism to find area of square, circle, and rectangle.

• Create a base class 'Shape' with a virtual function 'calculateArea'.

• Derive classes 'Square', 'Circle', and 'Rectangle' from 'Shape' class.

• Override 'calculateArea' function in each derived class to calculate area of respective shape.

A dictionary is a collection of words and their meanings.

• It is used to look up the meaning of a word.

• It can also include synonyms, antonyms, and pronunciation guides.

• Examples include Merriam-Webster, Oxford English Dictionary, and Urban Dictionary.

I am an AI language model and do not have a Btech project.

Encapsulation is the process of hiding implementation details and exposing only necessary information.

• Encapsulation is a fundamental concept in object-oriented programming.

• It helps in achieving data abstraction and information hiding.

• It allows for better control over the data and prevents unauthorized access.

• For example, a class can have private variables and public methods to access them.

• This way, the internal details of the class are hidden from the outside world.

Polymorphism is the ability of an object to take on many forms.

• It allows objects of different classes to be treated as if they were objects of the same class.

• It is achieved through method overriding and method overloading.

• Example: A shape class can have different subclasses like circle, square, and triangle, each with their own implementation of the draw method.

• Example: A method can take in different types of objects as parameters, as long as they share a common interface or ...read more

Yes, an array can store different elements of different data types.

• Arrays can store elements of different data types such as strings, numbers, and booleans.

• For example, an array can store ['apple', 5, true, 'banana']

• However, it is not recommended to mix data types in an array as it can lead to confusion and errors.

Yes, foreign keys can store null values.

• A foreign key can be set to NULL if the corresponding record in the parent table is deleted or updated.

• This can be useful in cases where the relationship between the tables is optional.

• However, it is important to ensure that the foreign key constraint is properly defined to avoid data inconsistencies.

Method overloading is when multiple methods have the same name but different parameters. Method overriding is when a subclass provides a specific implementation of a method that is already provided by its superclass.

• Method overloading involves creating multiple methods in the same class with the same name but different parameters.

• Method overriding occurs in a subclass that provides a specific implementation of a method that is already provided by its superclass.

• Example of met...read more

We will provide customized solutions based on the customer's specific needs and requirements.

• Listen carefully to the customer's concerns and requirements

• Analyze the problem and identify the root cause

• Provide a range of possible solutions and discuss the pros and cons of each

• Recommend the best solution based on the customer's needs and budget

• Implement the solution and provide ongoing support and maintenance

I do not have my Identity card with me at the moment.

• I do not have my ID card on me right now.

• I can provide other forms of identification if needed.

• I can provide my driver's license or passport as alternative IDs.

range and xrange are used to generate a sequence of numbers, but xrange is deprecated in Python 3.

• range generates a list of numbers from start to end (exclusive)

• xrange generates a sequence of numbers on-the-fly, saving memory

• xrange is deprecated in Python 3, range is used instead

A list is a collection of ordered and changeable elements of any data type in Python.

• Lists are created using square brackets []

• Elements in a list are separated by commas

• Lists can contain duplicates and elements of different data types

AI has the potential to revolutionize industries by automating tasks, improving efficiency, and enabling new capabilities.

• AI can automate repetitive tasks, freeing up time for more complex work.

• AI can analyze large amounts of data quickly and accurately, leading to better decision-making.

• AI can enable new capabilities such as natural language processing and image recognition.

• AI has the potential to transform industries like healthcare, finance, and transportation.

GIL stands for Global Interpreter Lock in Python, which is a mutex that protects access to Python objects.

• GIL is a mechanism used in CPython to ensure that only one thread executes Python bytecode at a time.

• It can limit the performance of multi-threaded Python programs, as only one thread can execute Python code at a time.

• GIL is specific to CPython and does not apply to other Python implementations like Jython or IronPython.

Monkey patching is a technique in programming where existing code is changed or extended at runtime.

• Monkey patching involves modifying or adding new methods to existing classes or modules.

• It is often used in dynamic languages like Python or Ruby to alter behavior without modifying the original source code.

• Example: Adding a new method to a built-in class in Python to customize its functionality.

pip is a package management system used to install and manage software packages written in Python.

• pip is included by default with Python installations since Python 3.4.

• It allows you to easily install, uninstall, and manage Python packages.

• You can use pip to install packages from the Python Package Index (PyPI) or from other sources.

• Example: 'pip install numpy' installs the numpy package.

Sort array in descending order using one variable

• Initialize a variable to store the current maximum value

• Iterate through the array and find the maximum value

• Swap the maximum value with the current element in the array

OS stands for Operating System, which is a software that manages computer hardware and software resources.

• OS acts as an interface between the user and the computer hardware.

• It manages memory, processes, and input/output devices.

• Examples of OS include Windows, macOS, Linux, and Android.

• OS determines the type of software that can be run on a computer.

• It provides security features to protect the system from malware and unauthorized access.

SDLC stands for Software Development Life Cycle. It is a process used to design, develop, and test software applications.

• SDLC is a structured approach to software development.

• It consists of several phases including requirements gathering, design, coding, testing, and maintenance.

• Each phase has specific activities and deliverables.

• SDLC helps ensure that software is developed efficiently and meets the needs of users.

• Examples of SDLC models include Waterfall, Agile, and DevOps.

DDL stands for Data Definition Language and is used to define the structure of database objects. DML stands for Data Manipulation Language and is used to manipulate data within the database.

• DDL is used to create, modify, and delete database objects such as tables, indexes, and views.

• DML is used to insert, update, delete, and retrieve data from database tables.

• Examples of DDL statements include CREATE TABLE, ALTER TABLE, and DROP TABLE.

• Examples of DML statements include INSERT...read more

OSI/ISO and TCP/IP models are both networking models, but differ in their layer structure and protocols used.

• OSI/ISO has 7 layers while TCP/IP has 4 layers

• OSI/ISO is a theoretical model while TCP/IP is a practical model

• OSI/ISO uses protocols such as X.25 and ISDN while TCP/IP uses protocols such as HTTP and FTP

• OSI/ISO is more complex and difficult to implement than TCP/IP

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.

• It eliminates the need for physical servers and hardware, reducing costs and increasing scalability.

• Examples include Amazon Web Services, Microsoft Azure, and Google Cloud Platform.

IOT stands for Internet of Things. It refers to the network of physical devices, vehicles, home appliances, and other items embedded with sensors, software, and connectivity.

• IOT enables devices to communicate with each other and with humans over the internet.

• It allows for remote monitoring and control of devices and systems.

• Examples include smart homes, wearable technology, and industrial automation.

• IOT has the potential to improve efficiency, reduce costs, and enhance safety...read more