switch(a){    default:        System.out.println("Welcome");}Of which data types can the variable ‘a’ be?1. long2. byte3. int4. char5. float6. short

In Java, the switch statement can be used with specific data types. Here's a breakdown of the compatible types for the variable a in the provided code snippet.

Compatible Data Types for a switch Statement

1. int: Compatible and commonly used with the switch statement.
2. byte: Compatible; it is a smaller integer type.
3. short: Compatible; it also represents a smaller integer.
4. char: Compatible; the switch statement can use characters as case labels.
5. String: Not listed, but it’s worth noting that String types are also compatible with switch in Java.
6. long: Not compatible; the switch statement does not support long.
7. float: Not compatible; the switch statement does not support floating-point numbers.

Summary

From the options provided, the variable a can be of the following data types when used with a switch statement: byte, int, char, and short. The types long and float are not compatible.