Question

12) Given here is an algorithm to swap two numbers. Which of the following line will
replace "?" to complete the algorithm?

A) X=X+Y
B) X=XXY
C) X=X/Y
D) X=X-Y
Step 4: X = X - YStep 2: ?
Step 3: Y = XYStep 1: Read two numbers X and Y.​

Answer 1

Answer:

A ID: 1102102807

X=X+Y

B

ID: 1102102807

X=X * Y

ID: 1102102807

X=Y - X

ID: 1102102807

X= X-Y

Answer 2

Answer:

Correct option is (A) X=X+Y. In the question step 3 must be Y= X - Y.

Explanation:

Let us understand the algorithm step by step:

Step 1 :

Read the values of X and Y.

Let us assume X = 10 and Y = 20

Step 2:

Let us use the equation X = X + Y

Now, X = 10 and Y = 20

Therefore, X = 10 + 20 = 30

So now new value of X is 30

Step 3:

Using equation Y = X - Y

Now values of X and Y are 30 and 20 respectively.

Y = 30 -20 = 10

So, now the new value of Y is 10.

Step 4:

Using equation X = X - Y

Now the values of X and Y are 30 and 10 respectively.

X = 30 - 10 = 20

So, now the new value of X is 20.

Conclusion:

Using the algorithm the value of X and Y are interchanged.

Now the value of X is 20 and Y is 10