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Persistent Systems
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I applied via Campus Placement and was interviewed in Jul 2021. There was 1 interview round.
Ethernet is a networking technology used for LANs. Switches and hubs are devices used to connect multiple devices to a network.
Ethernet is a protocol used for communication between devices on a network.
A switch is a networking device that connects devices on a network and directs data to its intended recipient.
A hub is a networking device that connects devices on a network and broadcasts data to all connected devices.
S...
Types of join in DBMS
Inner join: returns only the matching rows from both tables
Left join: returns all the rows from the left table and matching rows from the right table
Right join: returns all the rows from the right table and matching rows from the left table
Full outer join: returns all the rows from both tables, with NULL values in the columns where there is no match
Cross join: returns the Cartesian product of both
Write a pattern coding problem using an array of strings.
Use loops to iterate through the array and print the pattern.
The pattern can be any shape or design.
Make sure to use proper spacing and formatting.
posted on 17 Sep 2015
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posted on 11 Apr 2023
Counting characters using streams in Java
Use the chars() method to convert the string to an IntStream of characters
Use the count() method to count the number of characters in the stream
posted on 11 May 2022
Very easy
To find length, frequency of each character and list of unique characters of a string.
Iterate through the string and count the frequency of each character using a hash table.
Create a list of unique characters by iterating through the hash table.
Calculate the length of the string using the built-in length function.
Return the frequency, length and list of unique characters as an array of strings.
To check if a string is palindrome or not.
Compare the first and last characters of the string and continue towards the middle until all characters have been compared.
If all characters match, the string is a palindrome.
If any characters do not match, the string is not a palindrome.
posted on 27 Jan 2022
Recursion is a programming technique where a function calls itself to solve a problem.
Recursion involves breaking down a problem into smaller subproblems and solving them recursively.
It requires a base case to stop the recursion and prevent infinite loops.
Recursion can be used to solve problems like traversing trees and sorting algorithms.
Examples of recursive functions include factorial, Fibonacci sequence, and binary...
posted on 28 Mar 2022
I applied via Approached by Company and was interviewed before Mar 2021. There were 2 interview rounds.
Implement a stack using a queue data structure.
Create two queues, q1 and q2.
Push elements into q1.
When popping, dequeue all elements from q1 and enqueue them into q2 until the last element.
Dequeue and return the last element from q1.
Swap q1 and q2 after each push or pop operation.
To delete duplicate records, use SQL query with DISTINCT keyword.
Use SELECT DISTINCT to retrieve unique records.
Use DELETE with subquery to remove duplicate records.
In ASP.NET, use LINQ to retrieve distinct records.
In Assembly, use loop to compare and remove duplicate records.
I am a software developer with a strong background in programming and problem-solving. I have experience working in a reputable company and am seeking a competitive salary package.
I have a Bachelor's degree in Computer Science and have been working as a software developer for the past 5 years.
In my current company, I am responsible for developing and maintaining web applications using various programming languages and ...
I applied via Company Website and was interviewed before Dec 2022. There were 3 interview rounds.
Its was english grammer ,math & IT and genral knowledge based test paper
I applied via Naukri.com and was interviewed in Oct 2020. There were 4 interview rounds.
IDisposable is an interface used to release unmanaged resources.
It is used to release unmanaged resources like file handles, database connections, etc.
It has a single method called Dispose() which is used to release the resources.
It is implemented by classes that use unmanaged resources and needs to be disposed of.
Example: SqlConnection class implements IDisposable to release the database connection.
Example: FileStream...
Dependency Injection is a design pattern that allows objects to receive dependencies rather than creating them internally.
Dependency Injection is used to reduce tight coupling between software components.
It allows for easier testing and maintenance of code.
There are three types of Dependency Injection: Constructor Injection, Setter Injection, and Interface Injection.
Frameworks like Spring and Angular provide built-in s
Concatenate the values in the given integer array with comma.
Convert the integer array to string array using Arrays.toString()
Use String.join() method to concatenate with comma
No, abstract classes cannot be instantiated.
Abstract classes are incomplete and cannot be instantiated on their own.
They can only be used as a base class for other classes.
Instantiation of an abstract class will result in a compile-time error.
However, concrete classes that inherit from the abstract class can be instantiated.
SOLID is a set of principles for object-oriented programming to make software more maintainable and scalable.
S - Single Responsibility Principle
O - Open/Closed Principle
L - Liskov Substitution Principle
I - Interface Segregation Principle
D - Dependency Inversion Principle
Example: Using Single Responsibility Principle to separate UI and business logic
Example: Using Open/Closed Principle to extend functionality without mo
We used the Model-View-Controller (MVC) design pattern in our application.
MVC separates the application into three interconnected components: the model, the view, and the controller.
The model represents the data and business logic of the application.
The view displays the data to the user.
The controller handles user input and updates the model and view accordingly.
MVC promotes separation of concerns and modularity.
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