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Interview Questions and Answers for 'ScotiaBank' - 3 question(s) found - Order By Newest

Basic and Very Frequently asked.
  Q1. What is Polymorphism in Java ?Core Java2016-11-06 09:10:54

Ans. Polymorphism means the condition of occurring in several different forms.

Polymorphism in Java is achieved in two manners

1. Static polymorphism is the polymorphic resolution identified at compile time and is achieved through function overloading whereas

2. Dynamic polymorphism is the polymorphic resolution identified at runtime and is achieved through method overriding.

  Sample Code for overloading

  Sample Code for overriding

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   Like         Discuss         Correct / Improve     polymorphism  object oriented programming (oops)  oops concepts  oops concepts     Asked in 107 Companies      Basic        frequent

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Related Questions

  What are points to consider in terms of access modifier when we are overriding any method?
 If everything is an object , Cant we declare every object as

Object obj = new String();
  Shouldn't we make a class with all static members is its just expected to be executed as a standalone program with just one thread. Moreover Lets assume that there is no runtime Polymorphism required and there is no need for serialization ?
  Is this Polymorphism ?

Map<String, List<String>> inventoryManagerCountMap = new HashMap<String, ArrayList<String>>();
  When are static and instance methods resolved ? During compile time or Runtime ?
  Which of the following is not the difference between Singleton and Static class ( Class with static members only ) ?
 Which of the following do you think is the primary reason you would never use a static class even the application doesn't need multiple requests or threads ?

a. Serialization
b. Runtime Polymorphism
c. Lazy Loading
d. Memory
 How is static and dynamic polymorphism achieved in Java ?
 Why do we need polymorphism in Java ?

 Q2. What is Dirty read in Database Transactions ?Database2016-11-14 13:11:55

Ans. A dirty read occurs when a transaction is allowed to read data from a row that has been modified by another running transaction but not yet committed.

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   Like         Discuss         Correct / Improve     database transaction     Asked in 8 Companies

Related Questions

  What is database deadlock ? How can we avoid them?
  What things you would care about to improve the performance of Application if its identified that its DB communication that needs to be improved ?
  If you are given a choice to implement the code to either Insert a Record or Update if already exist, Which approach will you follow ?
 What is ACID ?
  What is the use of @GeneratedValue annotation in Hibernate?
 What happens to backups if we delete the RDS instance ?
  What is a Cursor ?
  What are temp tables ?
  Does SQL allow null values ? Can we use it within Where clause ?
  Write an SQL to find all records having all upper case alphanumeric characters in a field ?

 Q3. What is a factory design pattern ?Design2017-01-09 13:21:43

Ans. Factory Design Patterns is the pattern that recommends creation of separate Factory Object for creation of other object.

So its like saying - If you want to create an object of ClassA, Talk to FactoryObject ( which is an object of FactoryClass ). FactoryObject in itself encapsulates the inputs and logic required to make the decision regarding the creation and construction of object.

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   Like         Discuss         Correct / Improve     design pattern  factory design pattern     Asked in 9 Companies

Related Questions

 What is Dependency Injection or IOC ( Inversion of Control ) ?
  What are the Wrapper classes available for primitive types ?
  Difference between Factory and Abstract Factory Design Pattern ?
  What is MVC ?
  What Design pattern Wrapper Classes implement ?
 What are the disadvantages of Design Patterns ?
  Difference between Factory and Builder Design Pattern ?
  Difference between Proxy and Adapter ?
  Difference between Adapter and Facade ?
  Difference between Builder and Composite ?

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