Ricoh Interview Questions and Answers

Yes, a constructor can be declared privately.

• Private constructors are used to prevent the creation of objects of a class from outside the class itself.

• To access a private constructor from outside its class, we can use a public static method or a factory method.

• The public static method or factory method can create an instance of the class by calling the private constructor.

A class is a blueprint for creating objects that have properties and methods. One class can access another class using inheritance or composition.

• A class is a user-defined data type that encapsulates data and functions.

• Classes can have access modifiers like public, private, and protected.

• Inheritance allows a class to inherit properties and methods from another class.

• Composition allows a class to use objects of another class as its members.

• Example: A Car class can access an En...read more

A variable is a named storage location in memory that holds a value. A static variable is a variable that retains its value between function calls.

• Variables are used to store data in a program

• They can be of different data types such as int, float, char, etc.

• Static variables are declared with the static keyword and retain their value between function calls

• They are useful for maintaining state across function calls

Reverse a string without using predefined methods.

• Create an empty string to store the reversed string.

• Loop through the original string from the end to the beginning.

• Add each character to the empty string.

• Return the reversed string.

A constructor is a special method that is used to initialize objects of a class.

• Constructors have the same name as the class they belong to.

• They are called automatically when an object is created.

• They can take parameters to set initial values for object properties.

• If a class does not have a constructor, a default constructor is created automatically.