Question

I am in an entry-level Java class and need assistance solving questions 20-25 for a homework assignment. Any help is appreciated. Thank you.

Q20 Read the code and answer the question 6 Points Read each of the following code snippets and determine if they are equivalent. I.e. they produce the same output. Q20.1 Are these snippets equivalent? 2 Points Snippet 1: int i=0; while (i<10) System.cut.print(i); i++; 1 Snippet 2: for(int i-0; i<10; i++) System.out.print(i); } Yes O No Q20.2 Are these snippets equivalent? 2 Points Snippet 1: int i=0; while (i<10)

Answer 1

Question 20.1

In the first snippet we are printing numbers from 0 to 9 using a while loop. In the second snippet we are printing numbers from 0 to 9 again but with a for loop. Since the two snippets produce the same output, we can say that these are equivalent.

Question 20.2

In the first snippet, we are printing numbers from 1 to 9 because i is incremented before printing using a while loop. In the second snippet, we are printing numbers from 1 to 9 using a for loop. Since the two snippets produce the same output, we can say that these snippets are equivalent.

Question 20.3

In the first snippet we are printing numbers from 0 to 9 using a while loop. In the second snippet we are printing numbers from 0 to 9 using a for loop. Since the two snippets produce the same output, we can say that these snippets are equivalent.

Question 21.1

In the inner loop we print from 0 to i every time and then after this loop a new line is printed.

i is incrmeented from 0 to 3.

When i = 0, j = 0 but j should be less than i i.e. 0 and 0 is not less than 0, therefore, the inner loop won't execute and simply println().

Therefore, the output is :

0 (i = 1, j = 0; j < 1; j++)

01 (i = 2, j = 0; j < 2; j++)

012 (i = 3, j = 0; j < 3; j++)

Question 22.

When functionB() is called it first prints "Banana" and then calls functionG() which prints "Good". When functionG terminates, functionB() calls functionBr(). functionBr() prints "Bread" and then calls functionW() which stores "What" in s and calls functionS(s). In functionS(s) "Issues? "What" Issues?" is returned and printed in functionW.

Therefore the output of the given code is :

Banana

Good

Bread

Issues? What Issues?

Question 23.1

Mystery function prints "*" count number of times because in the base case it is >= 1 else return.

Question 23.2

In he while loop, mystery(1), mystery(2), mystery(3), mystery(4) is called and as explained above what mystery does, the output will be :

*

**

***

****

Question 24

The number is initialised with 42, first 42 is printed.

Then modifyInt(42) is called which increments the number and prints it i.e. prints 43 but after the function ends the number remains unchanged and we print 42.

Then an array is created with elements 1,11,111 and we print array[0] which is 1.

Then function modifyArray(array,0) is called which increments the value of at index which was 1 and now will be changed to 2 and we print it. Note the value is changed in this case because we incremented at psition i. Therefore, the output of the code is

42

43

42

1

2

Therefore, the 5 numbers printed are :

42 43 42 1 2 in the same order.

Question 25

total is initialised to 0, head is initialised to 0, tail = array.length-1 = 10-1 = 9

while(head < tail) // 0 < 9

Iteration 1 : array[tail] = array[9] = 10

array[head] = array[0] = 1

10-3 is not less than 5

head = 1

tail = 8

total = 0

Iteration 2 : array[tail] = array[8] = 9

array[head] = array[1] = 2

9-2 is not less than 5

head = 2

tail = 7

total = 0

Iteration 3 : array[tail] = array[7] = 8

array[head] = array[2] = 3

8-3 is not less than 5

head = 3

tail = 6

total = 0

Iteration 4 : array[tail] = array[6] = 7

array[head] = array[3] = 4

7-4 is less than 5

total = 0 + 1 = 1

head = 4

tail = 5

Iteration 5 :

array[tail] = array[5] = 6

array[head] = array[4] = 5

6-5 is less than 5

total = 1 + 1 = 2

head = 5

tail = 4

head is no more less than tail

Therefore, the numbers printed are :

0 0 0 0 1 2(The values of total for each iteration)

Please give an upvote if you liked my solution. Thank you :)