Question

I had a few questions in Computer Science (Java).

I got these questions wrong and I would like the CORRECT answer and an EXPLANATION PLEASE.

Please use the correct number when giving the answer such as

1a:.

1b:

etc

1. For Each of the following Bits of code enter the final value of the variable names ans. a. int x = 23; int y = 7; Int ans = x % y; My answer 1.61 (Wrong It was 2) b. int x = 42 int y = 10; int z = 5; int ans = (x/y) + (x % z); My answer 6.3 (Correct Answer 6) c. int x = 4; int y = 12; int z = 13; int ans = ((y * y) +z) / (y + z); My answer 6.28 (Correct answer 6) d. double x = 4.0; double y = 12.5; double z = 16.0; double ans = (Math.sqrt (z) + Math.pow(x, 3.0))/y; My answer 20.70 (Correct answer 5.44) 2. Assume the int variables a and b have already been defined. Write an if-then-else construct that tests three situations: a. a is less than My answer: int Case 1= (a <= b); My answer was wrong. b. a is equal to b int Case 2 = (a == b); my answer was wrong c. a is greater than b int Case 3 = (a >b);

Answer 1

1a)x%y % operator calculates the remainder of the expression
23%7 (7*3=21)23-21 =2 is the remainder
1b)x/y gives the quotient of the expression As both x and y are integers it returns int only
42/10=4 and 42%5(5*8=40) =4
4+2 =6

1c)

(y*y)+z = (12*12)+13=144+13=157
y+z=12+13=25
157/25 = 6 (it gives int because both are integers)

1d)

sqrt gives square root of number
4+2^3 = 4 + 64 =68
ans=68/12.5 =5.44
2)

if(a<b)
{
  
}
else if(a==b)
{
  
}
else if(a>b)
{
  
}

3)

System.out.println("He said \"coding is fun\" and we all agreed.");

4)int x=rand.nextInt(-50,50)

5)

Because it will consider all cases from 2 to 5 and default because no break statement is there

x=2*2*2=8
case 3:x=8+8=16
case 4:x=16=16+16=48
case 5:x=48*5=240
default x=1

atlast x becomes 1

6)Here also x will be 1 becase no break is there

7)Your answer is correct bt you gave 'o' instead of 0

for(int i=10;i>=0;i--)

8)

Same qestion as above

for(int i=10;i>=0;i--)

9)

It will calculate 2*i*i =2*0*0

3*i=3*0=0

0+0+10=10

for second 2*1*1+3*1+10=15

2*2*2+3*2+10=24

2*3*3+3*3+10=37

[10,15,24,37]

comment if any doubts