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Method overloading is having multiple methods with the same name but different parameters. Method overriding is having a method in a subclass with the same name and parameters as in the superclass.
Method overloading is compile-time polymorphism while method overriding is runtime polymorphism.
Method overloading is used to provide different ways of calling the same method with different parameters.
Method overriding ...
To create an object, define a class and instantiate it using the 'new' keyword.
Define a class with properties and methods
Instantiate the class using the 'new' keyword
Access the object's properties and methods using dot notation
throw is used to explicitly throw an exception in a method, while throws is used to declare the exceptions that a method may throw.
throw is used within a method to throw an exception when a certain condition is met
throws is used in the method signature to declare the exceptions that may be thrown by the method
throw is followed by an exception object, while throws is followed by the exception class names separated ...
OOPs is a programming paradigm based on the concept of objects that interact with each other.
OOPs stands for Object-Oriented Programming.
It focuses on creating objects that have properties and methods.
Encapsulation, Inheritance, and Polymorphism are the three main pillars of OOPs.
Encapsulation is the process of hiding the internal details of an object from the outside world.
Inheritance allows a class to inherit pr...
An interface is a contract that specifies the methods and properties that a class must implement.
An interface defines a set of methods and properties that a class must implement
Interfaces are used to achieve abstraction and polymorphism
Interfaces can be used to define contracts between different parts of a system
A class can implement multiple interfaces
Interfaces are declared using the 'interface' keyword in most ...
A collection is a group of related objects or data items that can be accessed and manipulated in a unified way.
Collections are used to store and organize data in a program.
They can be of various types such as arrays, lists, sets, maps, etc.
Collections provide methods to add, remove, and access elements.
Examples include ArrayList, HashSet, TreeMap, etc.
Checked exceptions are checked at compile-time, while unchecked exceptions are not.
Checked exceptions are declared in the method signature or caught using try-catch blocks.
Unchecked exceptions do not need to be declared or caught explicitly.
Checked exceptions are typically used for recoverable errors, while unchecked exceptions are used for unrecoverable errors.
Examples of checked exceptions include IOException an...
Inheritance is a mechanism in object-oriented programming where a new class is created by inheriting properties of an existing class.
Inheritance allows code reuse and promotes code organization.
The existing class is called the parent or superclass, and the new class is called the child or subclass.
The child class inherits all the properties and methods of the parent class, and can also add new properties and metho...
This program counts the number of digits, alphabets, and special characters in a given string.
Use a loop to iterate through each character in the string.
Check if the character is a digit using isdigit() method.
Check if the character is an alphabet using isalpha() method.
Count special characters by checking if the character is neither a digit nor an alphabet.
Example: For input 'r$3y@o9hy#*a&r', output will be: ...
Object-oriented programming in Java allows for creating classes and objects to model real-world entities. Multithreading enables concurrent execution of multiple threads within a single process.
Java supports OOP concepts like inheritance, encapsulation, polymorphism, and abstraction.
Multithreading in Java allows multiple threads to run concurrently, improving performance and responsiveness.
Example: Creating a new ...
1.Remove the duplicates in the array.
2.reverse a string
Object-oriented programming in Java allows for creating classes and objects to model real-world entities. Multithreading enables concurrent execution of multiple threads within a single process.
Java supports OOP concepts like inheritance, encapsulation, polymorphism, and abstraction.
Multithreading in Java allows multiple threads to run concurrently, improving performance and responsiveness.
Example: Creating a new threa...
I applied via Company Website and was interviewed in Jun 2021. There were 3 interview rounds.
Inheritance is a mechanism in object-oriented programming where a new class is created by inheriting properties of an existing class.
Inheritance allows code reuse and promotes code organization.
The existing class is called the parent or superclass, and the new class is called the child or subclass.
The child class inherits all the properties and methods of the parent class, and can also add new properties and methods.
Fo...
OOPs is a programming paradigm based on the concept of objects that interact with each other.
OOPs stands for Object-Oriented Programming.
It focuses on creating objects that have properties and methods.
Encapsulation, Inheritance, and Polymorphism are the three main pillars of OOPs.
Encapsulation is the process of hiding the internal details of an object from the outside world.
Inheritance allows a class to inherit propert...
A collection is a group of related objects or data items that can be accessed and manipulated in a unified way.
Collections are used to store and organize data in a program.
They can be of various types such as arrays, lists, sets, maps, etc.
Collections provide methods to add, remove, and access elements.
Examples include ArrayList, HashSet, TreeMap, etc.
throw is used to explicitly throw an exception in a method, while throws is used to declare the exceptions that a method may throw.
throw is used within a method to throw an exception when a certain condition is met
throws is used in the method signature to declare the exceptions that may be thrown by the method
throw is followed by an exception object, while throws is followed by the exception class names separated by co...
Checked exceptions are checked at compile-time, while unchecked exceptions are not.
Checked exceptions are declared in the method signature or caught using try-catch blocks.
Unchecked exceptions do not need to be declared or caught explicitly.
Checked exceptions are typically used for recoverable errors, while unchecked exceptions are used for unrecoverable errors.
Examples of checked exceptions include IOException and SQL...
To create an object, define a class and instantiate it using the 'new' keyword.
Define a class with properties and methods
Instantiate the class using the 'new' keyword
Access the object's properties and methods using dot notation
An interface is a contract that specifies the methods and properties that a class must implement.
An interface defines a set of methods and properties that a class must implement
Interfaces are used to achieve abstraction and polymorphism
Interfaces can be used to define contracts between different parts of a system
A class can implement multiple interfaces
Interfaces are declared using the 'interface' keyword in most progr...
Method overloading is having multiple methods with the same name but different parameters. Method overriding is having a method in a subclass with the same name and parameters as in the superclass.
Method overloading is compile-time polymorphism while method overriding is runtime polymorphism.
Method overloading is used to provide different ways of calling the same method with different parameters.
Method overriding is us...
This program counts the number of digits, alphabets, and special characters in a given string.
Use a loop to iterate through each character in the string.
Check if the character is a digit using isdigit() method.
Check if the character is an alphabet using isalpha() method.
Count special characters by checking if the character is neither a digit nor an alphabet.
Example: For input 'r$3y@o9hy#*a&r', output will be: numbe...
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I appeared for an interview before Mar 2021.
Round duration - 30 minutes
Round difficulty - Medium
This was a MCQ round. 30 ques in 30 mins consisting of difficult quantitative aptitude questions were to be solved.
Round duration - 60 minutes
Round difficulty - Medium
In this test round, 2 coding questions were given. Either write the code or pseudo code
Given an integer N
, find all possible placements of N
queens on an N x N
chessboard such that no two queens threaten each other.
A queen can attack another queen if they ar...
The N Queens Problem involves finding all possible placements of N queens on an N x N chessboard without threatening each other.
Use backtracking algorithm to explore all possible configurations.
Keep track of rows, columns, and diagonals to ensure queens do not threaten each other.
Generate all valid configurations and print them out.
Given an integer array arr
of size 'N' containing only 0s, 1s, and 2s, write an algorithm to sort the array.
The first line contains an integer 'T' representing the n...
Sort an array of 0s, 1s, and 2s in linear time complexity.
Use three pointers to keep track of 0s, 1s, and 2s while traversing the array.
Swap elements based on the values encountered to sort the array in-place.
Time complexity should be O(N) and space complexity should be O(1).
Round duration - 60 minutes
Round difficulty - Easy
This was a technical round with questions on DSA.
You are given a string of length N
. Your task is to reverse the string word by word. The input may contain multiple spaces between words and may have leading o...
Reverse words in a string while handling leading, trailing, and multiple spaces.
Split the input string by spaces to get individual words
Reverse the order of the words
Join the reversed words with a single space in between
You are provided with the head of a linked list containing integers. Your task is to determine if the linked list is circular.
Detect if a given linked list is circular by checking if it forms a closed loop.
Traverse the linked list using two pointers, one moving at double the speed of the other.
If the two pointers meet at any point, the linked list is circular.
If the faster pointer reaches the end of the list (NULL), the linked list is not circular.
Round duration - 30 minutes
Round difficulty - Easy
HR round with typical behavioral problems.
Tip 1 : Must do Previously asked Interview as well as Online Test Questions.
Tip 2 : Go through all the previous interview experiences from Codestudio and Leetcode.
Tip 3 : Do at-least 2 good projects and you must know every bit of them.
Tip 1 : Have at-least 2 good projects explained in short with all important points covered.
Tip 2 : Every skill must be mentioned.
Tip 3 : Focus on skills, projects and experiences more.
I appeared for an interview in Oct 2020.
Round duration - 90 minutes
Round difficulty - Easy
There were two section Aptitude and Coding.
Imagine you are Harshad Mehta's friend, and you have been given the stock prices of a particular company for the next 'N' days. You can perform up to two buy-and-sell ...
The task is to determine the maximum profit that can be achieved by performing up to two buy-and-sell transactions on a given set of stock prices.
Iterate through the array of stock prices and calculate the maximum profit that can be achieved by buying and selling at different points.
Keep track of the maximum profit after the first transaction and the maximum profit overall by considering different combinations of buy a...
Round duration - 60 minutes
Round difficulty - Easy
This was the first technical interview.
You are given an integer array 'ARR' of size 'N' and an integer 'S'. Your task is to find and return a list of all pairs of elements where each sum of a pair equals 'S'.
Find pairs of elements in an array that sum up to a given value, sorted in a specific order.
Iterate through the array and for each element, check if the complement (S - current element) exists in a hash set.
Keep track of pairs in a hash set to avoid duplicates.
Sort the pairs based on the criteria mentioned in the question.
Return the sorted list of pairs.
Tip 1 : Prepare theory subjects well
Tip 2 : Start doing some development and learn a framework from 2nd year
Tip 1: Mention projects with technologies
Tip 2: Make important words in bold
posted on 19 Sep 2024
I applied via Company Website and was interviewed in Aug 2024. There were 2 interview rounds.
Very basic aptitude questions along with few coding questions
I appeared for an interview in May 2025, where I was asked the following questions.
I am proficient in several programming languages, each suited for different tasks and projects.
JavaScript: Used for web development, creating interactive front-end applications.
Python: Great for data analysis, machine learning, and scripting tasks.
Java: Commonly used for building enterprise-level applications and Android development.
C#: Utilized for developing Windows applications and game development with Unity.
SQL: E...
posted on 15 Apr 2024
I applied via Campus Placement
The basic question is related to profit percentage, time and distance
Yes, the database schema can be of various types such as relational, hierarchical, network, object-oriented, etc.
Relational database schema is the most common type, using tables to store data with relationships between them.
Hierarchical database schema organizes data in a tree-like structure.
Network database schema allows multiple relationships between records.
Object-oriented database schema stores data as objects with...
posted on 5 Aug 2024
BASIC DSA LIKE ARRAY AND STRING
System design for an electric charger app involves creating a user-friendly interface, integrating with payment systems, and ensuring efficient charging station management.
Design a user-friendly interface for users to locate and reserve charging stations
Integrate with payment systems for seamless transactions
Implement efficient charging station management to monitor availability and maintenance
Consider scalability for ...
Design diagram for a software developer role.
Use UML diagrams to show class relationships and interactions
Include components like classes, interfaces, relationships, and methods
Consider using tools like Lucidchart or draw.io for creating the diagram
I applied via Campus Placement and was interviewed before Aug 2022. There were 4 interview rounds.
Competitive coding, multiple choice questions
OOPS concepts include Inheritance, Encapsulation, Polymorphism, and Abstraction.
Inheritance: Allows a class to inherit properties and behavior from another class.
Encapsulation: Bundling data and methods that operate on the data into a single unit.
Polymorphism: Ability to present the same interface for different data types.
Abstraction: Hiding the complex implementation details and showing only the necessary features.
A subnet is a smaller network within a larger network, created by dividing the IP address range of the larger network.
Subnets help in organizing and managing network resources efficiently.
They allow for better security by isolating different parts of the network.
Subnets can be created by dividing an IP address range into smaller ranges.
For example, a company may have different subnets for different departments like HR,...
I applied via Naukri.com and was interviewed in Sep 2021. There were 3 interview rounds.
Some of the top questions asked at the Girmiti Software Software Developer interview for experienced candidates -
based on 1 interview experience
based on 18 reviews
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