What is the output of the Java program?
Explanation: The output of the Java compiler is bytecode, which leads to the security and portability of the Java code. It is a highly developed set of instructions that are designed to be executed by the Java runtime system known as Java Virtual Machine (JVM).
Which type of method is system out Println () Mcq?
Explanation: print() and println() are defined under the class PrintStream, System. out is the byte stream used by these methods .
Which of these is correct way of inheriting class A by Class B?
Explanation: Class A & class B both contain display() method, class B inherits class A, when display() method is called by object of class B, display() method of class B is executed rather than that of Class A.
Which of these classes are used by byte streams for input and output operation?
Explanation: Byte stream uses InputStream and OutputStream classes for input and output operation.
What is the output of program?
Programs require data to be input. This data is used (processed) by the program, and data (or information ) is output as a result.
How do you give output in Java?
Java IO : Input-output in Java with Examples
- print(): This method in Java is used to display a text on the console. …
- println(): This method in Java is also used to display a text on the console. …
- printf(): This is the easiest of all methods as this is similar to printf in C.
What is this called in Java?
this Keyword in Java is a reference variable that refers to the current object. this in Java is a reference to the current object, whose method is being called upon. You can use “this” keyword to avoid naming conflicts in the method/constructor of your instance/object.
What happens if I remove static from main method?
The main() method in Java must be declared public, static and void. If any of these are missing, the Java program will compile but a runtime error will be thrown.
What are the rules of constructor?
Rules to be remembered
A constructor does not have return type. The name of the constructor is same as the name of the class. A constructor cannot be abstract, final, static and Synchronized. You can use the access specifiers public, protected & private with constructors.
Which of the following is correct about interface?
Which of the following statements is correct about an interface?
|1)||An interface can be implemented by multiple classes in the same program.|
|3)||The functions declared in an interface have a body|
|4)||A class that implements an interface can explicitly implement members of that interface.|
What is the use of this keyword in Java?
The this keyword refers to the current object in a method or constructor. The most common use of the this keyword is to eliminate the confusion between class attributes and parameters with the same name (because a class attribute is shadowed by a method or constructor parameter).
What will be the output of the following program #include?
int i, j, m; The variable i, j, m are declared as an integer type. >> j = a++; becomes j = 2++; Hence j = 2 and a = 3. Hence the output of the program is 3, 2, 15.
Which of these is a type of stream in Java?
The correct answer to the question “Which of these is a type of stream in Java” is, option (d). Byte stream. As you might be knowing, Java defines only 2 types of streams, they are Byte stream and the Character stream.
Is system a class in Java?
The System class of java contains several useful class fields and methods. It also provides facilities like standard input, standard output, and error output Streams. It can’t be instantiated.