50+ GenC Interview Questions and Answers for Freshers

Calculate the time taken by a train to pass through a tunnel given its speed, length, and the tunnel's length.

• Convert the speed of the train from mph to miles per minute.

• Calculate the time taken by the front of the train to enter the tunnel.

• Calculate the time taken by the rear of the train to exit the tunnel.

• Subtract the time taken by the front from the time taken by the rear to get the total time taken.

• Add the units to the final answer.

Code has a syntax error in printf statement. It should have a placeholder for user input.

• Add a placeholder in printf statement for user input.

• Use %d instead of 4589 in printf statement.

Google Facilitator Ready program is a training program that equips individuals with skills to facilitate Google's workshops and events.

• The program provides training on how to facilitate Google's workshops and events

• Participants learn how to create engaging content and deliver it effectively

• The program also covers how to manage logistics and handle participant questions

• Upon completion, participants receive a certificate and are eligible to facilitate Google's events

• Examples of...read more

Primary key uniquely identifies a record in a table, while foreign key refers to a field in another table.

• Primary key is used to enforce data integrity and ensure uniqueness of records.

• Foreign key is used to establish a relationship between two tables.

• A table can have only one primary key, but multiple foreign keys.

• Example: CustomerID in Orders table is a foreign key that references the Customer table's primary key.

• Primary key is denoted by a key symbol, while foreign key is ...read more

SQL query to find duplicate items in a database.

• Use GROUP BY clause to group the items by their values

• Use HAVING clause to filter out groups with count greater than 1

• Select the columns you want to display in the result

The latest technologies include AI, blockchain, 5G, quantum computing, and IoT.

• AI - machine learning, natural language processing

• Blockchain - decentralized ledgers, smart contracts

• 5G - faster internet speeds, low latency

• Quantum computing - exponential processing power

• IoT - interconnected devices, data collection

Instance variables are declared in a class and can be accessed by any method in the class. Local variables are declared in a method and can only be accessed within that method.

• Instance variables are declared at the class level, while local variables are declared within a method.

• Instance variables can be accessed by any method in the class, while local variables can only be accessed within the method they are declared in.

• Instance variables are initialized to default values, wh...read more

Code to print first 10 elements of Fibonacci series.

• Declare variables for first two numbers of the series

• Use a loop to generate the next numbers in the series

• Print the first 10 numbers of the series

Python has several built-in data types including numeric, sequence, and mapping types.

• Numeric types include integers, floats, and complex numbers.

• Sequence types include lists, tuples, and strings.

• Mapping types include dictionaries.

• Boolean type is also available.

• Type() function can be used to determine the data type of a variable.

while loop checks condition before executing, do while loop executes at least once before checking condition.

• while loop is entry controlled loop, do while loop is exit controlled loop

• while loop may not execute at all if condition is false initially, do while loop executes at least once

• while loop syntax: while(condition){ //code to execute }

• do while loop syntax: do{ //code to execute }while(condition);

C++ is an extension of C with object-oriented programming features.

• C++ supports classes and objects while C does not.

• C++ has better support for polymorphism and inheritance.

• C++ has a standard template library (STL) for data structures and algorithms.

• C++ allows function overloading and default arguments.

• C++ has exception handling for error management.

• C++ is more complex and has a steeper learning curve than C.

Python is the most comfortable programming language for me.

• Python has a simple and easy-to-learn syntax.

• It has a vast collection of libraries and frameworks.

• Python is versatile and can be used for various applications such as web development, data analysis, and machine learning.

• Python has a large community that provides support and resources.

• Examples: Flask, Django, NumPy, Pandas, TensorFlow.

A program to reverse a given string.

• Create an empty string to store the reversed string

• Loop through the original string from the end to the beginning

• Add each character to the new string

• Return the new string

Cognizant is a multinational technology company providing digital, technology, consulting, and operations services.

• Founded in 1994 and headquartered in Teaneck, New Jersey

• Has a global presence with operations in over 40 countries

• Offers services in areas such as artificial intelligence, cloud computing, and cybersecurity

• Works with clients across various industries including healthcare, finance, and retail

• Has over 300,000 employees worldwide

C and C++ are programming languages. C++ is an extension of C with additional features.

• C is a procedural language while C++ is an object-oriented language.

• C++ supports features like classes, inheritance, and polymorphism which are not present in C.

• C++ also has better support for templates and exception handling compared to C.

• C++ code can also be written in a more modular and reusable way compared to C.

• C++ is often used for developing complex software systems like operating sy...read more

Java has no pointers for safety reasons and to simplify memory management.

• Java uses references instead of pointers to avoid security vulnerabilities.

• Pointers can cause memory leaks and dangling references, which Java avoids.

• Java's garbage collector automatically manages memory, making pointers unnecessary.

• Example: Java's NullPointerException is a result of using a null reference, not a pointer.

• Example: C++ allows pointer arithmetic, which can lead to buffer overflows and othe...read more

Java is platform independent because it uses the concept of bytecode and virtual machine.

• Java programs are compiled into bytecode, which is a platform-independent representation of the code.

• The bytecode is then executed by the Java Virtual Machine (JVM), which is specific to each platform.

• The JVM interprets the bytecode and translates it into machine code that can be understood by the underlying operating system.

• This allows Java programs to run on any platform that has a comp...read more

An empty class can be created by simply declaring a class with no properties or methods.

• Declare a class with no properties or methods

• Example: class EmptyClass {}

• The class can be used as a placeholder for future implementation

Constructor overloading is the ability to have multiple constructors with different parameters in a class.

• Constructor overloading allows creating objects with different initializations.

• It helps in providing flexibility and convenience to the users of the class.

• Constructors can be overloaded by changing the number, type, or order of parameters.

• Example: class Person { Person() {} Person(String name) {} }

Code to connect database in Python

• Import the required module (e.g. pymysql, sqlite3)

• Establish a connection to the database using connect() method

• Create a cursor object using cursor() method

• Execute SQL queries using execute() method

• Commit changes using commit() method

• Close the cursor and connection using close() method

HTML stands for HyperText Markup Language, used to create and structure web pages.

• HTML is the standard markup language for creating web pages

• It uses tags to define the structure and content of a web page

• Examples of HTML tags include <html>, <head>, <title>, <body>, <p>, <a>, <img>

No, I do not have any backlogs.

• I have successfully completed all my courses and exams.

• I have maintained a good academic record throughout.

• I have never had to repeat a course or exam.

• I have always been diligent in my studies and time management.

Coding to check if a given year is leap or not

• A year is a leap year if it is divisible by 4 but not by 100, or if it is divisible by 400

• Use modulo operator to check if the year is divisible by 4, 100, and 400

• Return true if the year is divisible by 4 and not by 100, or if it is divisible by 400. Else, return false

Object-oriented programming features include encapsulation, inheritance, polymorphism, and abstraction.

• Encapsulation: bundling of data and methods that manipulate the data

• Inheritance: creating new classes from existing ones

• Polymorphism: ability of objects to take on multiple forms

• Abstraction: hiding implementation details from users

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 offers scalability, flexibility, and cost-effectiveness compared to traditional on-premises computing.

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

OOPS concepts are the fundamental principles of Object-Oriented Programming that help in designing and implementing software systems.

• Encapsulation: Bundling data and methods together in a class.

• Inheritance: Creating new classes from existing ones, inheriting their properties and behaviors.

• Polymorphism: Objects of different classes can be treated as objects of a common superclass.

• Abstraction: Hiding complex implementation details and providing simplified interfaces.

• Encapsulati...read more

Polymorphism, inheritance and OOPS are concepts in object-oriented programming.

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

• Inheritance allows a class to inherit properties and methods from another class.

• OOPS is a programming paradigm that uses objects to represent real-world entities and their interactions.

• Example of polymorphism: A shape class with different subclasses like circle, square, and triangle.

• Example of inheritanc...read more