5 Questions
What is the use of 'this' keyword in Java?
Refers to the current instance of the class
What is a mutable string?
A string whose content can be changed after it is created
How does a vector differ from a list in Java?
Vector is synchronized, whereas list is not
Why is Java called platform independent?
Because Java code can run on any platform without modification
What is the use of the 'finally()' method in Java?
To execute important code such as closing a connection or releasing resources
Study Notes
Java Fundamentals
- The
thiskeyword 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
Stringclass which is immutable.
Data Structures in Java
- A
Vectorin Java is a legacy collection class that is synchronized, making it thread-safe, whereas aListis an interface that can be implemented by various classes, includingArrayList, 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
finallymethod 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.
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.
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