Genus IT Solution Java Developer Interview Questions and Answers

Asking questions like String Number of Occurrence, Prime Number, Filter, Sort using Stream API, Array sum, Java 8 features

Q1. Oops concepts in java
Ans. 
Oops concepts in Java are fundamental principles of object-oriented programming like Inheritance, Polymorphism, Encapsulation, and Abstraction.
• Inheritance: Allows a class to inherit properties and behavior from another class.

• Polymorphism: Ability of an object to take on many forms.

• Encapsulation: Wrapping data and methods into a single unit.

• Abstraction: Hiding the implementation details and showing only the necessary fe
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Q2. Collection Frameworks
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Q3. String == and .equals difference
Ans. 
String == compares memory references, .equals compares actual content
• String == compares memory references, .equals compares actual content

• Example: String str1 = new String("hello"); String str2 = new String("hello"); str1 == str2 will be false, str1.equals(str2) will be true
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1 hour - 2 codes on string

Q1. Introduction of the candidate?
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Q2. OOPS concepts in java and exception handling?
Ans. 
OOPS concepts in Java include inheritance, polymorphism, encapsulation, and abstraction. Exception handling is used to manage errors in code.
• OOPS concepts in Java include inheritance, where a class inherits properties and behaviors from another class.

• Polymorphism allows objects to be treated as instances of their parent class, enabling flexibility in code.

• Encapsulation involves bundling data and methods within a class ...read more
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