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Questions and Answers
What is the use of 'this' keyword in Java?
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?
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?
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?
Why is Java called platform independent?
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What is the use of the 'finally()' method in Java?
What is the use of the 'finally()' method in Java?
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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.
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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.
