Enfusion Java Developer Interview Questions and Answers

Q1. Design patterns
Add your answer
Q2. How hashcode and equals related to each other
Add your answer

CodeSignal platform 2 easy and 2 difficult questions

3 Questions Medium Level

Q1. Java Coding Question Hard Level
Add your answer

Q1. Code singleton design pattern in java
Ans. 
Singleton design pattern ensures a class has only one instance and provides a global point of access to it.
• Create a private static instance of the class

• Provide a public static method to access the instance

• Ensure the constructor is private to prevent instantiation of multiple objects
Answered by AI
Add your answer
Q2. 2 sum in java
Ans. 
2 sum problem in Java involves finding two numbers in an array that add up to a specific target value.
• Use a HashMap to store the difference between the target value and each element in the array.

• Iterate through the array and check if the current element's complement exists in the HashMap.

• Return the indices of the two numbers that add up to the target value.
Answered by AI
Add your answer
Q3. How to make a class immutable
Ans. 
To make a class immutable, ensure that its state cannot be changed after instantiation.
• Make all fields private and final

• Do not provide setter methods

• Ensure that any mutable objects within the class are also made immutable
Answered by AI
Add your answer
Q4. Async annotation
Add your answer
Q5. Spring-starter dependencies
Add your answer

Q1. What is cyclomacic complexity
Ans. 
Cyclomatic complexity is a software metric used to measure the complexity of a program.
• It measures the number of linearly independent paths through a program's source code.

• It helps in identifying complex code that may be difficult to maintain or test.

• A higher cyclomatic complexity indicates a higher risk of errors and bugs in the code.

• It is calculated using the formula: E - N + 2P, where E is the number of edges, N is ...read more
Answered by AI
Add your answer
Q2. Simple output questions based on inheritance
Add your answer
Q3. OWASP top 10 security vulnerabilities
Add your answer

Q1. Basic DSA Question
Add your answer

Q1. Mobile Development Related Questions
Add your answer

Q1. Basic HR Questions
Add your answer

Maths and communication based questions

Estimate and SQL and coding was there

Time ,speed ,distance

Java application using oops concept

Q1. Inheritance , oops
Add your answer

Q1. Tell me about urself
Add your answer

1 hour interview. Needed to solve parts of single question. Next part would open only after completing the current part