EPAM Systems Full Stack Developer Interview Questions, Process, and Tips

Q1. What is a functional interface?
Ans. 
A functional interface is an interface that contains only one abstract method and can be used as a lambda expression.
• Functional interfaces can have multiple default or static methods, but only one abstract method.

• Functional interfaces are used in lambda expressions to provide implementation for the abstract method.

• Examples of functional interfaces in Java include Runnable, Callable, and ActionListener.
Answered by AI
Add your answer
Q2. Types of locks ?
Ans. 
Types of locks include mutex locks, spin locks, read-write locks, and file locks.
• Mutex locks: used to protect shared resources by allowing only one thread to access the resource at a time.

• Spin locks: busy-waiting locks that repeatedly check for the lock to become available.

• Read-write locks: allow multiple readers or a single writer to access a resource.

• File locks: used to prevent multiple processes from simultaneously
Answered by AI
Add your answer

Q1. Find the largest word in a list using Java Streams API
Ans. 
Find the largest word in a list using Java Streams API
• Use Java Streams API to convert the array of strings to a stream

• Use the 'max' method with a Comparator to find the largest word based on length

• Return the largest word found
Answered by AI
Add your answer
Q2. Given an array of integers, write a function that returns a list of numbers where the second digit from the left is 1
Add your answer
Q3. What is a functional interface in Java
Ans. 
A functional interface in Java is an interface that contains only one abstract method.
• Functional interfaces can have multiple default or static methods, but only one abstract method.

• They are used to enable lambda expressions and method references in Java.

• Examples of functional interfaces in Java include Runnable, Callable, and ActionListener.
Answered by AI
Add your answer

DSA duration 30 mins

Reatail application explanation of techical details

Q1. Career goals,developmental journey
Add your answer