Goldman Sachs Telephonic Interview - Round I

Core Java Questions -

1. Usage of synchronization and volatile
2. What is static class
3. Difference between static class and singleton class
4.  What are the usages of static keyword ?
5. Where in our JDK implementation, we have static classes
6. Difference between Vector and Array class

Programming Questions -

1. How to reverse a String with and without recursion
2. How to find a single unique element in an array (all others are duplicates)

Design Patterns -

1. What are design patterns you have worked on
2. What is factory pattern, tell me one scenario where you have used factory ?
3. Tell me some implementations of design patterns in JDK ?
4. Classes where we have Singleton or 

 Databases -

1. Tell me different types of normalization.

JDK -

1. Why java is architecture independent ?
2. What is Just in time compiler ?

Rest services based -

1. Why prefer JSONover SOAP
2. What are the objects that can be stored as JSON object
3. Can we have a null value in JSON Object