HackerRank Backend Software Engineer Interview Questions and Answers

LCA based Question and a string Based qu with some input output Questions

Q1. Difference between c and java
Ans. 
C is a low-level programming language while Java is a high-level programming language.
• C is compiled while Java is interpreted

• C has pointers while Java does not

• Java has automatic garbage collection while C does not

• Java is platform-independent while C is platform-dependent

• Java has built-in support for multithreading while C does not
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Q2. Difference between abstract class and interface
Ans. 
Abstract class can have implementation while interface only has method signatures.
• Abstract class can have constructors while interface cannot.

• A class can implement multiple interfaces but can only inherit from one abstract class.

• Abstract class can have non-public members while interface only has public members.

• Abstract class is used for creating a base class for other classes while interface is used for defining a cont...read more
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