HI Team.  Had an interview with Master Card. Please find below questions asked in interview (Android Profile)

• Introduce yourself
• Explain Oops concept.
• Abstract vs Interface (when to use)
• Array list vs linked list (when to use)
• Is hash map thread safe/ synchronized ? (Hashmap vs Hash set)
• Underlying data structure of hashmap/hashset.
• Final keyword in java (final method/class/variable)
• Difference between equals and == operator in java.
• Why is string immutable ?
• String vs String Builder ?
• How to create an Immutable class in Java?
• Explain Fragment life cycle.
• When does onActivityCreated get call ?
• Back stack management in fragment.
• Life cycle invocation based question wrt add/replace transaction.
• Explain launch mode with examples.
• Scenario based question. What would be the behaviour after launching the existing activity wrt difference launch mode ?
• Explain Image library used in your project
• Benefit of coil over glide.