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A functional interface is an interface that contains only one abstract method, used in Java to enable lambda expressions.
Functional interfaces can have multiple default or static methods, but only one abstract method.
Functional interfaces are used to enable lambda expressions in Java.
Examples of functional interfaces in Java include Runnable, Callable, and ActionListener.
An abstract class is a class that cannot be instantiated and is used as a blueprint for other classes to inherit from.
Cannot be instantiated on its own
May contain abstract methods that must be implemented by subclasses
Can have both abstract and non-abstract methods
Used to define common behavior for subclasses
I applied via campus placement at Atharva College of Engineering, Mumbai and was interviewed in Oct 2022. There were 5 interview rounds.
The basic of aptitude such as percentage, relative speed, family relation and quick response questions
Basic code such as String Manipulation and Array basic coding
Top trending discussions
I was interviewed in Jan 2025.
Basic aptitude questions to
Basic coding questions
I applied via Campus Placement and was interviewed in Aug 2024. There were 2 interview rounds.
3 coding question
2 medium 1 hard
Find the sum of kth to bth largest numbers in a huge array efficiently.
Sort the array in descending order to easily find the kth and bth largest numbers.
Use a priority queue or min heap to efficiently find the kth and bth largest numbers without sorting the entire array.
Once you have the kth and bth largest numbers, iterate through the array and sum the numbers between them.
I applied via Job Portal and was interviewed in Aug 2024. There were 2 interview rounds.
DSA + JAVA + Spring boot
LLD (bookmyshow) + DSA
An immutable class is a class whose instances cannot be modified after creation.
Use final keyword for class declaration to prevent inheritance
Make all fields private and final to prevent modification
Do not provide setter methods, only getter methods should be used
Implement a Springboot service to intercept HTTP requests.
Create a Springboot application with necessary dependencies.
Implement a custom interceptor by extending HandlerInterceptorAdapter.
Override preHandle and postHandle methods to intercept requests and responses.
Register the interceptor in the WebMvcConfigurerAdapter configuration class.
Basic CS Core questions
posted on 29 Oct 2024
based on 2 interviews
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