Which is a valid declaration of a Boolean?

The correct valid declaration is boolean b1 = false.

Likewise, people ask, which is valid declaration of float?

1)	float f = 1.0;
2)	float f = 1F;
3)	float f = 1.0d;
4)	float f = "1";
5)	NULL

One may also ask, which three are valid declarations of a char? char C1 = 064770;char C2 = 'face';char C3 = 0xbeef;char C4 = u0022;char C5 = 'iface';char C6 = 'uface';A. 1, 2, 4B. 1, 3, 6C.

Similarly, it is asked, which is a valid declaration within an interface?

A public access modifier is acceptable. The method prototypes in an interface are all abstract by virtue of their declaration, and should not be declared abstract. Option B is wrong. The final modifier means that this method cannot be constructed in a subclass.

Which of these values can a Boolean variable contain?

Explanation: Boolean variable can contain only one of two possible values, true and false.

Which is a valid declaration of a string?

Which is a valid declarations of a String? String s1 = null; B. String s2 = 'null';

What is the numerical range of char?

0 to 65535

What is string in Java?

String is a sequence of characters, for e.g. “Hello” is a string of 5 characters. In java, string is an immutable object which means it is constant and can cannot be changed once it has been created.

Which is a valid keyword in Java?

Which is a valid keyword in java? Explanation: interface is a valid keyword. Option B is wrong because although "String" is a class type in Java, "string" is not a keyword.

Which one is true about a constructor?

What is true about constructor? Explanation: Constructor returns a new object with variables defined as in the class. Instance variables are newly created and only one copy of static variables are created. Explanation: No instance can be created of abstract class.

What is the use of final keyword in Java?

final keyword in Java. final is a non-access modifier for Java elements. The final modifier is used for finalizing the implementations of classes, methods, and variables.

What is the output of relational operators?

The output of the relational operator is (true/false) boolean value, and in Java, true or false is a non-numeric value that is not related to zero or one.

Which data type value is returned by all transcendental math functions?

Only double data type value is returned by all transcendental math functions.

Which is valid in a class that extends Class A?

Which is valid in a class that extends class A? Explanation: Option A is correct - because the class that extends A is just simply overriding method1. The different return type means that the method is not overriding but the same argument list means that the method is not overloading.

What is the most restrictive access modifier?

Private Access Modifier - Private Methods, variables, and constructors that are declared private can only be accessed within the declared class itself. Private access modifier is the most restrictive access level. Class and interfaces cannot be private.

Which statement is true about a static nested class?

Which statement is true about a static nested class? You must have a reference to an instance of the enclosing class in order to instantiate it. It does not have access to nonstatic members of the enclosing class. It's variables and methods must be static.

Which one of the following will declare an array and initialise it with five numbers?

Which one of the following will declare an array and initialize it with five numbers?

1)	int [] a = {23,22,21,20,19};
2)	Array a = new Array(5);
3)	int [5] array;
4)	int a [] = new int[5];
5)	NULL

What interface does Java Util Hashtable implement?

util. Hashtable. The pure class interface. This class implements a hashtable, which maps keys to values.

Which access modifier must be used to restrict access to that method to only the other members of the same class?

Explanation: The private access modifier limits access to members of the same class.

Which of these Cannot be used for a variable name in Java?

You cannot use keywords like int , for , class etc as variable name (or identifiers) as they are part of the Java programming language syntax. Here's the complete list of all keywords in Java programming.

Which method must be defined by a class implementing the Java Lang runnable interface?

Runnable interface must define run() method. Answer: The run() method from runnable interface needs to be implement as any thread starts its execution from the run method.so the initial point of any thread is run().

Which Cannot directly cause a thread to stop executing?

Which cannot directly cause a thread to stop executing? Calling the SetPriority() method on a Thread object. Calling the wait() method on an object. Calling read() method on an InputStream object.