Java Programming Quiz

Which of the following are components of the Java platform?

• JVM(Java Virtual Machine), the java application programming interface (API)

• JVM(Java Virtual Machine), Java Run-time Environment

• JVM(Java Virtual Machine), java compiler

• Java compiler, java

What is the meaning of platform-independent?

• write once, run anywhere

• not easy to execute on any system after compilation.

• the execution of the program is restricted by the type of OS environment provided.

• All of the others

What is the role of the Java Development Kit (JDK) in java programming? Choose multiple correct answers.

• A cross-platformed software development environment that offers a collection of tools and libraries necessary for developing Java-based software applications.

• A core package used in Java programming, along with the JVM (Java Virtual Machine) and the JRE (Java Runtime Environment) to develop and deploy applications

• A software for building applications that combines common developer tools into a single graphical user interface (GUI).

• A text editor that can assist in writing software code with features such as syntax highlighting with visual cues

What is the role of the Garbage Collection?

• It frees heap memory by destroying unreachable objects.

• It deletes all the Java files available on the memory.

• It loads a Java program into memory.

• It checks the output of any Java program and deletes anything that does not make sense at all.

To run a Java program, which the software must be installed?

• Java Runtime Environment (JRE)

• Eclipse

• Java Development Kit (JDK)

• Netbeans

Which of the following is NOT a Java feature?

• Use of pointers.

• Ease of learning.

• It is a secure language.

• Independent Platform.

What is the file extension of Java source code?

• java

• class

• .jar

• .rar

Which of the following is a primitive data type in Java?

• ArrayList

• Float

• String

• Character

• byte

What is the default value of the data type double in Java?

• 1.0

• 0

• 0.0

• Null

• -1.0

Assume that all library files are imported. What is the output of the following code snippet? public static void main(String[] args){ boolean result = a instanceof Date; Date a=new Date(); System.out.print("a is an instance of "+result); }

• a is an instance of true

• a is an instance of Object

• a is an instance of Date

• a is an instance of false