Which is the correct declaration of a Boolean variable?

Which is the correct declaration of a Boolean variable Mcq?

Which one is a valid declaration of a boolean? Explanation: Boolean can only be assigned true or false literals. 6.

Which is the correct declaration of a Boolean variable *?

A boolean can only be assigned the literal true or false.

Which is the correct declaration of a Boolean variable in Java?

Boolean Data Values in Java

In Java, there is a variable type for Boolean values: boolean user = true; So instead of typing int or double or string, you just type boolean (with a lower case “b”). After the name of you variable, you can assign a value of either true or false.

How do you declare a Boolean variable?

Boolean variables are variables that can have only two possible values: true, and false. To declare a Boolean variable, we use the keyword bool. To initialize or assign a true or false value to a Boolean variable, we use the keywords true and false.

Which of the following is a valid declaration of boolean Mcq?

Correct Option: B

Boolean can only be assigned true or false literals.

Which one is a valid declaration of a boolean boolean b3 false?

boolean b3 = false; D.

Which of the following is a valid declaration of a character?

7) Which of the following is a valid declaration of a char? Answer: (a) char ch = ‘\utea’; Explanation: A char literal may contain a Unicode character (UTF-16).

Which of the following is a valid declaration of a string?

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What do the following declaration signify?

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Which is valid declaration within an interface definition?

Explanation. Option A is correct. 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.

Which of the following is incorrect array declaration?

Which of these is an incorrect array declaration? Explanation: Operator new must be succeeded by array type and array size.

Which of following is correct array declaration?

Which of the following correctly declares an array? Explanation: Option A is correct. Int is the data type used,geeks is the name of the array and [20] is the size of the array.

Which of these is an incorrect declaration?

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Which of these is a correct array declaration?

The Option b “int [] arr =new int[5]” is the correct syntax because it creates the object of int array class with the help of a new keyword. The Option c “int arr[] = new int[5]” is the correct syntax because it creates the object of int array class with the help of a new keyword.

Which of these is incorrect array declaration Mcq?

int arr[] = new int[5]. Explanation: int arr[] = int [5] is an incorrect array declaration because Operator new must be succeeded by array type and array size.

Which is an incorrect declaration of one dimensional array?

int x[5]={1,2}; ⇒ is an incorrect declaration of one dimensional array.

Which of the following is a valid declaration of an object of class student?

The answer is Box obj= new Box.

In object oriented programming, the class object will be formed with the help of the new keyword. The class box contains various attributes that helps the user to create an object.

Which of the following Java declaration of the string array is correct?

A String Array can be declared as follows: String[] stringArray1 //Declaration of the String Array without specifying the size. String[] stringArray2 = new String[2]; //Declarartion by specifying the size.

Which of the following declares array of string objects?

Answer. The first one is to use the square bracket after the variable name, for example: String myArray[]; The other way of declaring String Array in Java is to place the square brackets after the data type.

How do you declare an array of strings in Java?

A String array can be initialized either inline along with the declaration or it can be initialized after declaring it. First, let’s see how a String array can be initialized inline. String[] numarray = {“one”, “two”, “three”}; String[] strArray = new String[] {“one”, “two”, “three”, “four”};

What is string array in Java?

In the Java programming language, we have a String data type. The string is nothing but an object representing a sequence of char values. Strings are immutable in java. Immutable means strings cannot be modified in java. When we create an array of type String in Java, it is called String Array in Java.

How do you make a HashMap in Java?

Java HashMap Example

1. import java.util.*;
2. public class HashMapExample1{
3. public static void main(String args[]){
4. HashMap<Integer,String> map=new HashMap<Integer,String>();//Creating HashMap.
5. map.put(1,”Mango”); //Put elements in Map.
6. map.put(2,”Apple”);
7. map.put(3,”Banana”);
8. map.put(4,”Grapes”);

How do you declare a 2D array in Java?

Two – dimensional Array (2D-Array)

1. Declaration – Syntax: data_type[][] array_name = new data_type[x][y]; For example: int[][] arr = new int[10][20];
2. Initialization – Syntax: array_name[row_index][column_index] = value; For example: arr[0][0] = 1;