Java Intro

Which of these components are used in a Java program for compilation, debugging, and execution?

• JDK

• JRE

• JVM

• J2EE

When an expression consists of int, double, long, float, then the entire expression will get promoted into a data type that is:

• int

• double

• long

• float

find the output

• 3 3 6

• 2 3 4

• 2 2 3

• 3 1 6

find the correct main method signature

• public static void main(String[] obj)

• public static void main(String obj)

• public static void main(string[] obj)

• public static void main(int[] obj)

Find the correct way to create scanner obj to get input

• Scanner sc = new Scanner();

• Scanner sc = new Scanner(System);

• Scanner sc = new Scanner(System.out);

• Scanner sc = new Scanner(System.in);

find the incorrect method to get String input from user using Scanner obj sc

• sc.next()

• sc.nextLine()

• sc.nextString()

What is the extension of compiled java classes?

• .txt

• .exe

• .java

• .class