Torry Harris Integration Solutions Associate Software Engineer Interview Questions and Answers for Freshers

Program to split two strings into an array of strings

• Use the split() method to split the strings

• Specify the delimiter to split the strings

• Store the split strings in an array

this() is used in Java to call a constructor of the same class.

• this() can be used to call a constructor with default arguments.

• It can also be used to call a constructor with specific arguments.

• this() must be the first statement in a constructor.

• It can only be used inside a constructor.

• Example: public MyClass(int x) { this(x, 0); }

• Example: public MyClass(int x, int y) { this.x = x; this.y = y; }

Object-oriented programming concepts including encapsulation, inheritance, polymorphism, and abstraction.

• Encapsulation: bundling data and methods that operate on that data within a single unit

• Inheritance: creating new classes from existing ones, inheriting their properties and methods

• Polymorphism: ability of objects to take on multiple forms, often achieved through method overriding

• Abstraction: hiding implementation details and only exposing necessary information to users

Call by reference passes the address of the variable while call by value passes the value itself.

• Call by reference allows the function to modify the original variable

• Call by value creates a copy of the variable for the function to use

• Call by reference is more memory efficient for large data types

• Call by value is safer as it prevents unintended changes to the original variable

Garbage collection is an automatic memory management process in Java.

• Garbage collection frees up memory by removing objects that are no longer in use.

• Java uses a mark-and-sweep algorithm to identify and remove unused objects.

• The System.gc() method can be used to suggest garbage collection, but it is not guaranteed to run immediately.

• Garbage collection can impact performance, so it is important to optimize code to minimize unnecessary object creation.

Git is a version control system used for tracking changes in code and collaborating with others.

• Git allows for branching and merging of code

• It tracks changes made to code over time

• It allows for collaboration with others on the same codebase

• Git can be used for both personal and professional projects