Question 1

Question 2What are the unique features of for loop?

Accepted Answer

for loop is an entry-controlled loop. Its general syntax is as follows:for (initialization; conditional; increment/decrement)  
{  
    //Java Statements  
    ..  
    ..  
}The initialization expression initializes the loop control variable and is executed only once when the loop starts. It is optional and can be omitted by just putting a semicolon.The conditional expression is tested at the start of each iteration of the loop. Loop will iterate as long as this condition remains true.The increment/decrement expression updates the loop control variable after each iteration.The body of the loop that consists of the statements that needs to be repeatedly executed.

Question 2

Question 3Explain the switch statement with an example.

Accepted Answer

switch statement in a program, is used for multi-way branch. It compares its expression to multiple case values for equality and executes the case whose value is equal to the expression of switch. If none of the cases match, default case is executed. If default case is absent and no case values match then none of the statements from switch are executed. The below program makes use of the switch statement to print the value of a number if the number is 0, 1 or 2:class SwitchExample {
    public static void demoSwitch(int number) {
        switch (number) {

case 0:
                System.out.println("Value of number is zero");
                break;

case 1:
                System.out.println("Value of number is one");
                break;

case 2:
                System.out.println("Value of number is two");
                break;

default:
                System.out.println("Value of number is greater than two");
                break;

}
    }
}

Question 3

Question 4What is the importance of break and default statements in switch?

Accepted Answer

break statement — The break statement takes the flow of control out of the switch statement. Without the break statement, execution would simply continue to the next case.default statement — When none of the case values are equal to the expression of switch statement then default case is executed. Default case is optional. If default case is absent and no case values match then none of the statements from switch are executed.

Question 4

Question 5Give one difference between while and do while loop.

Accepted Answer

whiledo-whileIt is an entry-controlled loop.It is an exit-controlled loop.It is helpful in situations where number of iterations are not known.It is suitable when we need to display a menu to the user.

Question 5

Question 1Radhika is writing a program in Java to print her name 10 times. Suggest her the appropriate condition for the same.

Accepted Answer

Radhika can print her name using a for loop in Java like this:for (int i = 1; i <= 10; i++) {
    System.out.println("Radhika");
}

Question 6

Question 6The order in which statements are executed in a running program is called the Flow of control.

Accepted Answer

Answer: Flow of control

Question 7

Question 8Write a program to print the largest of three numbers.public class KboatLargestNumber
{
    public static void largestNumber(int a, int b, int c) {
        System.out.println("The three numbers are " 
               + a + ", " + b + ", " + c);
        
        System.out.print("Largest Number: ");
        if (a > b && a > c)
            System.out.println(a);
        else if (b > a && b > c)
            System.out.println(b);
        else
            System.out.println(c);
    }
}Output

Accepted Answer

Please refer to the full solution above.

Question 8

Question 9Write a program to print the Fibonacci series upto 10 terms.[A series of numbers in which each number is the sum of the two preceding numbers. For example: 0,1,1,2,3, ............... n].public class KboatFibonacci
{
    public static void main(String args[]) {
        int a = 0;
        int b = 1;
        System.out.print(a + " " + b);
        /*
         * i is starting from 3 below
         * instead of 1 because we have 
         * already printed 2 terms of
         * the series. The for loop will 
         * print the series from third
         * term onwards.
         */
        for (int i = 3; i <= 10; i++) {
            int term = a + b;
            System.out.print(" " + term);
            a = b;
            b = term;
        }
    }
}Output

Accepted Answer

Please refer to the full solution above.

Question 9

Question 10Create a program to display whether the entered character is in uppercase or lowercase.public class KboatLetterCheck { public static void checkLetter(char ch) { System.out.println("Entered character: " + ch); if (ch >= 65 && ch <= 90) System.out.println("Uppercase"); else if (ch >= 97 && ch <= 122) System.out.println("Lowercase"); else System.out.println("Not a letter"); } }Output

Accepted Answer

Please refer to the full solution above.

Question 10

Question 7Which control structure is used when there is a requirement to check multiple conditions in a program?if elseswitchfor

Accepted Answer

Answer: switch

Decision Control Structure

Answer the following

Application Based Questions

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Lab Session

Multiple Choice Questions