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Object-Oriented Programming Quiz

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Questions and Answers

What is the use of 'this' keyword in Java?

Refers to the current instance of the class (correct)

Indicates the end of a method

Used to create objects

Used for exception handling

What is a mutable string?

A string with variable length

A string that is immutable once created

A string that cannot be used in Java programming

A string whose content can be changed after it is created (correct)

How does a vector differ from a list in Java?

List can dynamically resize, whereas vector cannot

Vector is synchronized, whereas list is not (correct)

List is synchronized, whereas vector is not

Vector can store different data types, whereas list cannot

Why is Java called platform independent?

<p>Because Java code can run on any platform without modification</p> Signup and view all the answers

What is the use of the 'finally()' method in Java?

<p>To execute important code such as closing a connection or releasing resources</p> Signup and view all the answers

Study Notes

Java Fundamentals

The this keyword in Java refers to the current object of the class, allowing developers to access class members and pass the object as a parameter to other methods.

Strings in Java

A mutable string in Java is a string that can be modified after its creation, unlike the String class which is immutable.

Data Structures in Java

A Vector in Java is a legacy collection class that is synchronized, making it thread-safe, whereas a List is an interface that can be implemented by various classes, including ArrayList, which is not synchronized.

Platform Independence

Java is called platform independent because Java code is compiled into an intermediate format called bytecode, which can run on any platform that has a Java Virtual Machine (JVM), without the need for recompilation.

Exception Handling in Java

The finally method in Java is used to execute important code, such as closing resources, regardless of whether an exception is thrown or not, ensuring that resources are always released.

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Description

Test your knowledge on Object-Oriented Programming with this Computer Science quiz. Covering topics like mutable string and other fundamental concepts, this quiz is designed to challenge and assess your understanding of the subject.