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Java Lead Interview Questions
6,748 java lead interview questions shared by candidates
What are exceptions What are generics What is a stream and lambda and can you implement it Few questions on collections Write a query to get 2nd highest salary of employee.
1. Functional interfaces 2. Microservices patterns 3. Exception Handling
Most unexpected aspect was the rote approach of using the equivalent of a Java101 exam to test someone's ability to apply it solve real world problems.
Data structures, algorithms and design patterns
Most of the questions were knowledge based and around resume. Questions related to design were also asked. Java and J2ee questions were mostly knowledge based.
Very Basic Stream API questions - filter(), collect()
AWS SQS Microservice to microservice transactions Multithreading Concepts Kafka (Consumer groups) SQL DB designing. Java 8 version and java 11 Patterns used in microservice Familiarity with async API How do you share AWS secrets And how to connect from spring boot java to AWS. - challenges in your project - which frontend technologies did you use - types of EC2 instances - what is EMR? - what is cloudtrail? - describe how you used AWS in your previous project - default storage class for S3 - what types of databases are in AWS - can you use postgres in AWS - what is SQS 1. AWS questions were asked 2. What is the first level and second level cache in Hibernate? How do they work? 3. Questions around Agile practices 4. Difference between flat map and map in java 5. @SpringBootApplication annotation It was on the same concepts you mentioned. mostly microservices and communication between them with AWS secrets and EC2 service questions. he also asked on react components prompts 1. Some questions were from my past projects. 2. Few questions from how I implemented AWS services in my project 3. Some AngularJS technical questions
Questions on technologies from your resume.
Programming Test 1.write a program check if the expression isbalanced or not? 2. AAAABBBCCDDDD you have to print it as 4A3B2C4D 3.find the count of longest sequence number in arrays {1,5,7,8,3,1,2,3,4,5,9} , answer is 5, {1,2,3,4,5} 4. Implementation of Blocking queue enque and deque methods
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