Mu Sigma Decision Sciences Analyst Interview Questions and Answers

Q1. Tell me about your self
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Basic Aptitude test with moderate level questions and some are tricky

Two moderate level coding questions and one complex coding question

Which one is the best online classes or offline classes

Q1. Explain the difference between equals and == difference in java
Ans. 
Equals method compares the content of objects while == compares the reference of objects in Java.
• Equals method is used to compare the content of two objects in Java.

• == operator is used to compare the reference of two objects in Java.

• Equals method is overridden in most of the classes to provide meaningful comparison.

• Example: String s1 = new String("Hello"); String s2 = new String("Hello"); s1.equals(s2) will return true
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Q2. Explain the 4 pillars of oops concepts in java with examples
Ans. 
The 4 pillars of OOPs concepts in Java are Abstraction, Encapsulation, Inheritance, and Polymorphism.
• Abstraction: Hiding implementation details and showing only necessary information. Example: Abstract class

• Encapsulation: Wrapping data and code into a single unit. Example: Private variables and methods

• Inheritance: Acquiring properties and behavior of a parent class. Example: Child class inheriting from a parent class

• Po...read more
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