Fresher Than Fresh Java Programmer Interview Questions, Process, and Tips

Online java assessment test - java, java 8, spring boot, microservices

Q1. What are the common issues faced while deploying a service to AWS?
Ans. 
Common issues faced while deploying a service to AWS
• Configuration errors leading to service downtime

• Security misconfigurations exposing sensitive data

• Performance issues due to improper resource allocation

• Network connectivity problems affecting service availability

• Lack of monitoring and logging causing difficulties in troubleshooting

• Incompatibility issues with other AWS services or third-party integrations
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Q2. Difference between @Mock and @InjectMock
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Difference between @Mock and @InjectMock annotations in Java testing
• Use @Mock to create a mock object of a class or interface

• Use @InjectMock to inject the mock object into the class being tested

• Example: @Mock UserService userService; @InjectMock UserController userController;

• Example: Mockito.when(userService.getUserById(1)).thenReturn(new User());
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Q3. What is integration testing?
Ans. 
Integration testing is testing the interaction between different components or systems to ensure they work together correctly.
• Integration testing verifies that different modules or services work together as expected.

• It focuses on testing the interfaces and communication between components.

• Examples include testing API endpoints, database interactions, and third-party integrations.
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Coding questions on String and HashMap

Q1. Knapsack problem
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Q2. Find median in a stream of integers
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Use two heaps to maintain the median in a stream of integers
• Use a max heap to store the smaller half of the numbers and a min heap to store the larger half

• Keep the size of the two heaps balanced or differ by at most 1 to find the median efficiently
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Q1. It was nice company
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Q2. Spring boot experience
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Q3. Spring boot experience
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Core Java my SQL spring boot