Software Development Engineer Iii Interview Questions

7,035 software development engineer iii interview questions shared by candidates

Round 2 - Core Java theory questions - 1. how to make a class immutable? What is the use case? 2. What is the difference between deep copy and shallow copy. 3. how do you declare a singleton class? Write code. 4. Consider below statements - String s1 = "abc" String s2 = new String("abc") String s3 = “abc” what is output of s1==s2 s1==s3 5. set s; s.put(new Student("a", 1)) s.put(new Student("b", 2)) s.put(new Student("a", 1)) what is the size of s 6. how are collisions handled in hashmap? 7. worst case time complexity of inserting element to hashmap 8. using multithreading write program to print output numbers from 1 to 100 even numbers should execute by 1 thread and odd by others. order of numbers 1 - 100 should be maintained
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Software Development Engineer III

Interviewed at Walmart Global Tech

3.6
Mar 25, 2025

Round 2 - Core Java theory questions - 1. how to make a class immutable? What is the use case? 2. What is the difference between deep copy and shallow copy. 3. how do you declare a singleton class? Write code. 4. Consider below statements - String s1 = "abc" String s2 = new String("abc") String s3 = “abc” what is output of s1==s2 s1==s3 5. set s; s.put(new Student("a", 1)) s.put(new Student("b", 2)) s.put(new Student("a", 1)) what is the size of s 6. how are collisions handled in hashmap? 7. worst case time complexity of inserting element to hashmap 8. using multithreading write program to print output numbers from 1 to 100 even numbers should execute by 1 thread and odd by others. order of numbers 1 - 100 should be maintained

Core Java: ========= 1. Why String is immutable ? 2. How HashMap works internally ? 3. OOPS concepts and Polymorphism with example ? 4. Thread creation, Diff between Sleep and Wait ? 5. Synchronization and Serializable ? 6. Collections which you have used in your project and difference between them ? 7. String pooling concepts and diff between String created with New keyword and Literal ? 8. How many ways an object can be created in Java ? 9. Exceptions handling basic questions. Spring & Hibernate =============== 1. What is IOC and DI ? 2. Annotations which you have used. 3 . Autowiring. 4. Stereotype annotations. 5. Spring JDBC vrs Hibernate. 6. Class to Table mapping using JPA annotations. 7. Hibernate configurations. 8. Different types of Spring container. 9. Spring JPA configurations. 10. Spring Hibernate integration. 11. Spring security worked or not ? If yes how to configure and how it works ? Web Services =========== 1. Different between rest and soap ? 2. Protocol used by REST ? 3. Different HTTP methods supported by REST. 4. Annotations in JAX-RS like produces consumes ? 5. Which implementation of JAX-RS is used like Jersey or Spring With REST ? Extra ==== 1. How to deploy code in WAS or Jboss ? 2. How to configure JOB in jenkins ? 3. What is docker ? 4. Have you worked with AWS or Azure ?
Apr 29, 2019

Core Java: ========= 1. Why String is immutable ? 2. How HashMap works internally ? 3. OOPS concepts and Polymorphism with example ? 4. Thread creation, Diff between Sleep and Wait ? 5. Synchronization and Serializable ? 6. Collections which you have used in your project and difference between them ? 7. String pooling concepts and diff between String created with New keyword and Literal ? 8. How many ways an object can be created in Java ? 9. Exceptions handling basic questions. Spring & Hibernate =============== 1. What is IOC and DI ? 2. Annotations which you have used. 3 . Autowiring. 4. Stereotype annotations. 5. Spring JDBC vrs Hibernate. 6. Class to Table mapping using JPA annotations. 7. Hibernate configurations. 8. Different types of Spring container. 9. Spring JPA configurations. 10. Spring Hibernate integration. 11. Spring security worked or not ? If yes how to configure and how it works ? Web Services =========== 1. Different between rest and soap ? 2. Protocol used by REST ? 3. Different HTTP methods supported by REST. 4. Annotations in JAX-RS like produces consumes ? 5. Which implementation of JAX-RS is used like Jersey or Spring With REST ? Extra ==== 1. How to deploy code in WAS or Jboss ? 2. How to configure JOB in jenkins ? 3. What is docker ? 4. Have you worked with AWS or Azure ?

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