JP Morgan Interview Experience for SDE Bangalore 2022

Technical Zoom call (1 hour):

Coding question:

• Implement stack from another data structure in Java
• Which data structure you can choose and why?
• Implement push, pop, top, iterator
• Implement a view for it
• Explain its access modifiers.

Java Questions:

• Why Java 8? What features does it have over old versions?
• Overloading vs overriding with examples?
•  Base class with an int argument, inherited class with string argument – overloading or overriding?
•  The class implements two interfaces, having the same method – overloading or overriding?
•  Adding throws exception is allowed in overriding?
• What is Stream API on Java
• Map key criteria: what criteria should the key object have? toString() / hashCode() / equals() … ?
• What do you mean about immutability?
• How to make one object immutable?
• How to handle / how does Java handle collisions in the map?
• What is abstraction vs composition in Java?
• What are concurrency and multi-threading in Java?

Spring boot:

• What is a spring boot?
• What do you mean by you can develop source code quickly using spring boot?

SQL:

• What is SQL join?
• Is that true join can operate only primary keys?
• Is that true join can be done on composite keys?