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1 Q) Write a program to calculate the factorial of any given integer. import java.io.*; class Data public static void main(string[] args) throws IOException int i,n,f=1; String s = new String(); InputStreamReader r = new InputStreamReader (System.in); BufferedReader input = new BufferedReader (r); System.out.println("Enter value"); n = Integer.parseInt(s); for (i=n;i>=1;i--) f = f * i; System.out.println("FACTORIAL =" + f); Q) Write a program to read the temperature given in Fahrenheit and convert it to celsius. The formula for conversion is as given below c = (f-32)/1.8 import java.io.*; class Temperature public static void main(string args[])throws IOException Khateeb Engineering Classes : / Page 1

2 double f,c; InputStreamReader r = new InputStreamReader (System.in); BufferedReader input = new BufferedReader (r); String s = new String(); System.out.println("ENTER TEMPERATURE IN FAHRENHEIT"); f = Double.parseDouble(s); c = (f-32)/1.8 ; System.out.println("Celsius = " + c); Q) Write a program to evaluate the following Expression 1 + 1/2 + 1/ /n import java.util.*; class Series public static void main(string[] args) int i,n; double ans = 0; Scanner read = new Scanner (System.in); System.out.println("ENTER VALUE OF 'n'"); n = read.nextint(); for (i = 1;i<=n; i++) Khateeb Engineering Classes : / Page 2

3 ans = ans / i; System.out.println("Answer = " + ans); import java.io.*; class Data public static void main(string args[])throws IOException double eoq,tbo,dr,sc,ht; InputStreamReader r = new InputStreamReader (System.in); BufferedReader input = new BufferedReader (r); String s = new String(); System.out.println("Enter Demand rate"); Khateeb Engineering Classes : / Page 3

4 dr = Double.parseDouble(s); System.out.println("Enter Setup cost"); sc = Double.parseDouble(s); System.out.println("Enter Holding time"); ht = Double.parseDouble(s); eoq = Math.sqrt(( (2* dr*sc)/ht)); tbo = Math.sqrt((2*sc)/ht); System.out.println("EOQ = " + eoq); System.out.println("TBo = " + tbo); Q) For any electrical circuit having resistance R and inductance L, the damped natural frequency is given as It is desired to study the variation in the frequency for all the values of C, starting from 0.01 to 0.1 in intervals of import java.io.*; class Data public static void main(string args[])throws IOException Khateeb Engineering Classes : / Page 4

5 double r,l,c,f ; InputStreamReader p = new InputStreamReader (System.in); BufferedReader input = new BufferedReader (p); String s = new String( ); System.out.println("Enter Resistence"); r = Double.parseDouble(s); System.out.println("Enter Inductance"); l = Double.parseDouble(s); System.out.println("C " + "\t" + "F"); for ( c = 0.01 ; c<= 0.1; c = c ) f = Math.sqrt((1/(l*c)) - ((r*r)/(4*c*c))); System.out.println(c + "\t" + f); Q)A set of two linear equations with two unknowns x1 and x2 are given as ax1 + bx2 = m cx1 + dx2 = n And the set of two unique solutions is given as, Khateeb Engineering Classes : / Page 5

6 Write a program to read the values of a,b,c,d,m & n and calculate x1 & x2.also report an error if the denominator is zero. import java.util.*; class Equation public static void main(string args[ ]) double a,b,c,d,m,n,e; Scanner read = new Scanner (System.in); System.out.println("ENTER VALUES"); a= read.nextdouble(); b = read.nextdouble(); c = read.nextdouble(); d = read.nextdouble(); m = read.nextdouble(); n = read.nextdouble(); e= (a*d) - (c*b); if (e==0) else System.out.println("Denominator is zero"); compute(a,b,c,d,e,m,n); Khateeb Engineering Classes : / Page 6

7 static void compute(double a,double b,double c, double d,double e, double m,double n) double x1,x2; x1 = ((m*d) - (b*n))/e; x2 = ((n*a) - (m*c))/e; System.out.println("x1 = " + x1); System.out.println("x2 = "+ x2); Q) A cloth market offers the following discounts on the purchase amounts. Purchase Discounts amount Mill Cloth Handloom 0 to % 101 to 200 5% 10% 201 to % 15% 301 onwards 15% 20% Write a program for calculating the amount to be paid by the customer after reading the purchase amount from the user. import java.io.*; class Discount Khateeb Engineering Classes : / Page 7

8 public static void main(string args[ ]) throws IOException double a; int option = 0,op; InputStreamReader r = new InputStreamReader(System.in); BufferedReader input = new BufferedReader (r); String s = new String(); System.out.println("ENTER AMOUNT"); s= input.readline(); a = Double.parseDouble(s); if ( (a>0) && (a<=100)) option = 1; if ( (a>100) && (a<=200)) option = 2; if ( (a>200) && (a<=300)) option = 3; if (a>300) option = 4; switch (option) Khateeb Engineering Classes : / Page 8

9 case 1 : op = menu(); if (op == 1) a = a; else a = a*0.95; System.out.println("AMOUNT =" + a); break; case 2 : op = menu(); if (op == 1) a = a * 0.95; else a = a*0.9; System.out.println("AMOUNT =" + a); break; case 3 : op = menu(); if (op == 1) a = a * 0.9; else a = a*0.85; System.out.println("AMOUNT =" + a); break; case 4 : op = menu(); if (op == 1) a = a * 0.85; else a = a*0.8; Khateeb Engineering Classes : / Page 9

10 System.out.println("AMOUNT =" + a); break; //end Switch //End method static int menu() throws IOException int x; InputStreamReader r = new InputStreamReader(System.in); BufferedReader input = new BufferedReader (r); String s = new String(); System.out.println("Enter cloth type"); System.out.println("1.MILL CLOTH"); System.out.println("2.HANDLOOM"); System.out.println("Enter option"); x = Integer.parseInt(s); return x; //end menu //end class discount Khateeb Engineering Classes : / Page 10