Java Programming Basics

What is the correct statement to print "Hello World" (without double quotes)?

System.out.println("Hello World")

System.out("Hello World");

System.out.println("Hello World");

System.out.println('Hello World');

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Correct Answer

Explanation

What is the result of the following calculation?

1 public class Main {
2  public static void main(String[] args) {
3  // Write your code here
4  int a = 3;
5  int b = 4;
6  int c = 5;
7  System.out.println(a + b * c + b);
8  }
9 }

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Correct Answer

Explanation

What is the result of the following calculation?

public class Ex { 
  public static void main(String[] args) { 
    System.out.println(5 + 15 / 3 * 2 - 8 % 3); 
  } 
}

Missing

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Correct Answer

Explanation

Is string concatenation using '+' allowed in Java?

Yes

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Correct Answer

Explanation

What is the result of print statement in this Java program (+=)?

public class AssShortcutExample {
   public static void main(String args[]) {
      int num1 = 10;
      int num2 = 20;

      num2 += num1;
      System.out.println("= Output: "+num2);
    }
}

Missing

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Correct Answer

Explanation

What is the result of print statement in this Java program (-=)?

public class AssShortcutExample {
   public static void main(String args[]) {
      int num1 = 10;
      int num2 = 20;

      num2 -= num1;
      System.out.println("= Result: "+num2);
    }
}

Missing

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Correct Answer

Explanation

What is the difference between float and double data types in Java?

float is a decimal number and double is not

float can be used inside classes but double cannot

float provides less decimal points than double

float cannot be passed as a variable to method but double could be

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Correct Answer

Explanation

What is the difference between int and long in Java?

int is a data type to represent number, but long is used for string

long is data type which is no longer used in java where it was replaced by int

int is 32-bit width where long is 64-bit width

The decimal point of long is 64-bit where int decimal point is 32-bit

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