IT401 Business Computer Languages Instructions: Name: ### CRN: ### ID: ### 2 Mar

Question

IT401

Business Computer Languages

Instructions:

Name: ###

CRN: ###

ID: ###

2 Marks

Learning Outcome(s):

Ch. (6).

Be able to use common loop algorithms

Be able to program loops with the while and for statements

Question One

Write a program in Java to read 5 integers and print their sum and average. Use loop statements in your code. The output of your program looks like:

1.5 Marks

Learning Outcome(s):

Ch. (6).

Be able to use common loop algorithms

Be able to program loops with the while and for statements

Question Two

Write a program in Java to read 5 integers and print and print the minimum and maximum values .Use while loop and if statements in your code. The output of your program looks like:

0.5 Marks

Learning Outcome(s):

Ch. (7)

become familiar with using arrays and array lists

Question Three

What is the value of m after running the following code?

int[] m = new int[8];

m[0] = 1;

for (int i = 1; i < m.length; i++) {

m[i] = m[i-1] + i;

}

1 Marks

Learning Outcome(s):

Ch. (7)

Become familiar with using arrays and array lists

Question Four

Find and fix the error in each of the following codes:

1.

int[ ] a = new int[ 60 ];

for( int h = 0; h <= a.length; h++ )

a[ h ] = 1;

2.

ArrayList m = new ArrayList();

m.add(1);

m.add(2);

m.remove(0);

Explanation / Answer

1. Write a program in Java to read 5 integers and print their sum and average. Use loop statements in your code. The output of your program looks like:

import java.io.*;
import java.util.*;

class Question 1 {

public static void main(String args[]) throws IOException {
Scanner obj = new Scanner(System.in);
int sum=0;
for(int i=0;i<5;i++){
sum += obj.nextInt();
}
double avg = (sum*1d)/5;
System.out.println("Sum : "+sum+" Avg : "+avg);
}
}

OUTPUT :

2
1
5
4
3
Sum : 15 Avg : 3.0

2.. Question 2 :

import java.io.*;
import java.util.*;

class Question2 {

public static void main(String args[]) throws IOException {
Scanner obj = new Scanner(System.in);
int min = Integer.MAX_VALUE;
int max = Integer.MIN_VALUE;
for(int i=0;i<5;i++){
int num = obj.nextInt();
min = Math.min(min, num);
max = Math.max(max, num);
}
System.out.println("Min : "+min+" Max : "+max);
}
}

OUTPUT :

2
3
1
5
4
Min : 1 Max : 5

3. Question 3 ;

Array m is [1, 2, 4, 7, 11, 16, 22, 29]

4. Question 4
The terminating condition for the for loop is h<=a.length. This will give ArrayIndexOutofBoundsException since h can be atmax a.length-1;

In this ArrayList, the object types which the arraylist holds is not declared. But, this won't cause any error.

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