Birlasoft Java Developer Interview Questions, Process, and Tips

String is immutable in Java to ensure thread safety, security, and optimization.

• Immutable strings are thread-safe as they cannot be modified concurrently by multiple threads.

• Immutable strings prevent security vulnerabilities like SQL injection attacks.

• Immutable strings allow for string interning, reducing memory usage and improving performance.

HashMap is a data structure in Java that stores key-value pairs and allows for fast retrieval of values based on keys.

• HashMap uses hashing to store and retrieve key-value pairs efficiently.

• Keys in a HashMap must be unique, but values can be duplicated.

• HashMap allows for null keys and null values.

• Example: HashMap map = new HashMap<>(); map.put("apple", 5); int value = map.get("apple");

HashMap is a data structure that stores key-value pairs and allows for fast retrieval of values based on keys.

• HashMap uses hashing to store and retrieve key-value pairs.

• Keys must be unique but values can be duplicated.

• HashMap allows for null keys and null values.

• Example: HashMap map = new HashMap<>(); map.put("key1", 1); int value = map.get("key1");

String is immutable in Java to ensure thread safety, security, and optimization.

• Immutable strings are thread-safe as they cannot be modified concurrently by multiple threads.

• Immutable strings prevent security vulnerabilities like SQL injection attacks.

• Immutable strings allow for string interning, reducing memory usage and improving performance.

The expected location refers to where the candidate is willing to work or relocate for the job.

• Be honest about your preferred location and willingness to relocate if necessary.

• Consider mentioning specific cities or regions you are interested in.

• Highlight any factors that may influence your decision, such as family or personal preferences.

I would rate myself 4 out of 5 in Core Java and 3 out of 5 in Spring.

• Strong understanding of object-oriented programming concepts in Core Java.

• Experience in developing Java applications using frameworks like Spring MVC and Spring Boot.

• Proficient in using Spring features like dependency injection, AOP, and MVC architecture.

• Familiarity with Spring Data JPA for database operations.

• Knowledge of Spring Security for implemen...read more