Core Java - Interview Questions and Answers for 'Println' | Search Interview Question

Core Java - Interview Questions and Answers for 'Println' - 5 question(s) found - Order By Newest

Q1. Explain System.out.println ?

Ans. System is a class within java.lang package that contains several useful class fields and methods. It cannot be instantiated and hence can use only statically.even in this case this has been used statically i.e with class name itself and without creating an instance.

out is the static reference of Printstream declared as following in the System Class -

public final static PrintStream out = null;

println is the method of PrintStream class.

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Q2. What is the difference between System.console.write and System.out.println ?

Ans. System.console() returns null if your application is not run in a terminal (though you can handle this in your application)System.console() provides methods for reading password without echoing charactersSystem.out and System.err use the default platform encoding, while the Console class output methods use the console encoding

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Q3. What is the difference between out.println(a+b); and out.println (a+" " +b); in Java? with a=2 and b=1

Core Java

Ans. First will give the ouput as 3 and the second will give output as 2 1

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Q4. What is the difference between print() and println() in Java ?

Ans. print method prints the argument passed to the method whereas println prints the argument and then prints the new line character. println is generally used if we want each output in a new line.

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Q5. Difference between System.out.printf and System.out.println ?

Core Java

Ans. println prints an additional end of line whereas printf doesnt.

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Q6. What is out in System.out.println ?

Core Java

a. out is static inner class

b. out is the reference for static inner class object

c. out is the static reference to OutputStream object

d. out is the static reference to PrintStream object

Ans.d. out is the static reference to PrintStream object

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