Question

Please answer and explain thank you.

Question 1

What will be printed when the following code is executed?

double x = 45678.259;
System.out.printf("%,.2f", x);

Group of answer choices

45678.259

0,045,678.26

45,678.26

45,678.3

Question 2

What will be printed when the following code is executed?

double x = 45678.259;
String output = String.format("%,.1f", x);
System.out.println(output);

Group of answer choices

45678.259

45,678.259

45,678.26

45,678.3

Question 3

What will be the value of ans after the following code has been executed?

int ans=0;

for(int i=0; i <= 120; i+=10)
ans += 10;

Group of answer choices

10

130

120

No value, there is a syntax error.

Question 4

What will be the value of bonus after the following code is executed?

double sal=10000, bonus=0;

if (sal<=10000)
bonus=1000;
else
bonus=500;

Group of answer choices

200

500

750

1000

1250

Question 5

What will be the value of x after the following code is executed?

int x = 75;
int y = 60;
if (x > y)
x = x - y;

Group of answer choices

75

15

60

135

Question 6

What will be the values of ans, x, and y after the following statements are executed?

int ans=0, x=0, y=0;

x=+x;
y=+y;
ans=x+y;
y=50;
x=y++;
y+=x;
x=ans;
ans=--y-40;

Group of answer choices

ans = 60, x = 50, y =100

ans = 60, x =0, y =100

ans = 45, x = 50, y = 0

ans = 45, x = 50, y = 50

Question 7

What will be the values of ans, x, and y after the following statements are executed?

int ans, x, y;
ans=x=y=1;
ans=x++;
y=--x;

Group of answer choices

ans = 0, x = 1, y = 2

ans = 2, x = -1, y = 2

ans = 1, x = 1, y = 1

ans = 1, x = 0, y = 1

Question 8

What would be the value of bonus after the following statements are executed?

int weeklySal=450;
double bonus=(double)(450/10)

Group of answer choices

100.0

500.0

45.0

Question 9

What would be the value of bonus after the following statements are executed?

int sal=10000;

if(sal>20000)
bonus=2000;
else if(sal>15000)
bonus=1500;
else if(sal>12500)
bonus=1250;
esle
bonus=1000;

Group of answer choices

2000

1500

1250

1000

Question 10

What would be the value of discountRate after the following statements are executed?

double purchaseAmount=500;

if(purchaseAmount>1000)
discountRate=.05;
else if(purchaseAmount>800)
discountRate=.03;
else if(purchaseAmount>600)
discountRate=.01;
else
discountRate=0.0;

Group of answer choices

.05

.03

.01

0.0

Question 11

What would be the value of discountRate after the following statements are executed?

double purchaseAmount=1000;

if(purchaseAmount<=500)
discountRate=0;
else if(purchaseAmount<=700)
discountRate=.01;
else if(purchaseAmount<=800)
discountRate=.03;
else if(purchaseAmount<=900)
discountRate=.04;
else
discountRate=.05;

Group of answer choices

.05

.03

.01

0

Question 12

What would be the value of discountRate after the following statements are executed?

double purchaseAmount=590;

if(purchaseAmount<500)
discountRate=0;
else if(purchaseAmount<700)
discountRate=.01;
else if(purchaseAmount<800)
discountRate=.03;
else if(purchaseAmount<900)
discountRate=.04;
else
discountRate=.05;

Group of answer choices

.05

.04

.03

.01

Question 13

What would be the value of x after the following statements were executed?

int x;

for(x=0; x <= 20; x+=5)
System.out.println(x);

Group of answer choices

5

20

25

30

Question 14

Which of the following correctly tests the char variable chr to determine whether it is NOT equal to the character B?

Group of answer choices

if (chr > 'B')

if (chr < 'B')

if (chr != 'B')

if (chr != "B")

Question 15

Which of the following expressions will determine whether x is less than or equal to y?

Group of answer choices

x > y

x =< y

x <= y

x >= y

Question 16

Which of the following is the correct boolean expression to test for: int x being a value between, but not including, 500 and 650, or int y not equal to 1000?

Group of answer choices

(x<=500 || x>650) && y !=1000

x<500 && x>650 || y !=1000

(x<500 || x>650) && y !=1000

(x<500 OR x>650) AND y !=1000

Question 17

Which of the following is the correct boolean expression to test for: int x being a value less than or equal to 500 or greater than 650, and int y not equal to 1000?

Group of answer choices

(x<500 OR x>650) AND y NOT EQUAL 1000

x<500 OR x>650 AND y!=1000

x<=500 || x>650 && y !=1000

(x<=500 || x>650) && y !=1000

Question 18

Which of the following will format 12.78 to display as 12.8%?

Group of answer choices

System.out.printf("%2.1d%", 12.78);

System.out.printf("%.2f%%", 12.78);

System.out.printf("%1.2d%", 12.78);

System.out.printf("%.1f%%", 12.78);

Question 19

Which of the following will format 12.7801 to display as $12.78?

Group of answer choices

System.out.printf("$%,.2f", 12.7801);

System.out.printf("%f", 12.7801);

System.out.printf("%.2f$$", 12.7801);

System.out.printf("$d", 12.7801);

Question 20

Which one of the following is the "not equal" operator?

Group of answer choices

NOT=

NOT

*&

!=

Answer 1

Answer 1:

45,678.26

Using "%,.2f" as parameter, the comma "," means to use comma separator for every three digits on the left side of the dot, and the 2 after the dot "." indicates two decimal places for the conversion.

Answer 2:

 45,678.3

Using "%,.1f" as parameter, the comma "," means to use comma separator for every three digits on the left side of the dot, and the 1 after the dot "." indicates one decimal place for the conversion.

Answer 3:

 130

This for loop will run 13 times and add 10 to ans in every iteration. So 130 is the answer.

Answer 4:

 1000.0

Since bonus is double type and sal=10000 which will make true if condition and then bonus will assigned as 1000.So the answer is 1000.0

Answer 5:

 15

Since x=75 and y=60 and x>y so x=x-y means x=75-60=15. So, 15 is the answer.

Answer 6:

 ans=60,x=0,y=100

The values of ans, x, and y changes as follows after each line:

x=+x; //x=0

y=+y; //y=0

ans=x+y;//ans=0

y=50;

x=y++; //x=50,y=51

y+=x; //x=50,y=101

x=ans; //x=0

ans=--y-40; //ans=60,y=100,x=0

System.out.println(ans); //60

System.out.println(x);//0

System.out.println(y);//100

Answer 7:

 Ans=1,x=1,y=1

The values of ans, x, and y changes as follows after each line:

int ans, x, y;

ans=x=y=1;//ans=1,x=1,y=1

ans=x++;//ans=1,x=2,y=1

y=--x;//ans=1,y=1,x=1

System.out.println(ans); //1

System.out.println(x);//1

System.out.println(y);//1

Answer 8:

 45.0

450/10=45 and double changes it type to 45.0

Answer 9:

 1000

Since sal=10000 which is less than 20000,15000 and 125000 so when else condition execute the bonus =1000 which is answer.

Answer 10:

 0.0

Since purchaseAmount=500 which is less than 1000,800,600 so when else condition is execute the discountRate=0.0 .

Answer 11:

 0.05

Since purchaseAmount=1000 which is greater than 500,700,800,900 so when else condition is execute the discountRate=0.05 .

Answer 12:

 0.01

Since purchaseAmount=590 which is less than 700 so elseif condition execute so discountRate=0.01

Answer 13:

 0

 5

 10

 15

 20

Since in for loop x=0 it will run till x not equal to 20 so x will increment by adding 5 after each iteration .Hence result will be 0,5,10,15,20 as above.

Answer 14:

if (chr != 'B') is the answer because != (not equal) operator is used to compare with charater b.

But these are not answer because:

if (chr > 'B')   //‘>’ is use for greater than

if (chr < 'B') // ‘<’ is use for less than

if (chr != "B")// Here B is not string

Answer 15:

x<=y is the answer.

But these are not answer because:

x > y //It is x greater than y

x =< y //it is invalid operator

x >= y //it is x greater than equal to y

Answer 16:

To test for int x being a value between, but not including, 500 and 650, or int y not equal to 1000

x<500 && x>650 || y !=1000 is the answer because || is logical OR operator and && is logical AND Boolean operator.

But these are not answers because:

1. (x<=500 || x>650) && y !=1000 //Here && operator is used with y

2. (x<500 || x>650) && y !=1000 //Here && operator is used with y

3. (x<500 OR x>650) AND y !=1000 //Here AND/OR are not operator

Answer 17:

To test for: int x being a value less than or equal to 500 or greater than 650, and int y not equal to 1000

(x<=500 || x>650) && y !=1000 is the answer.

But these are not answers :

1. (x<500 OR x>650) AND y NOT EQUAL 1000

      Here NOT EQUAL/OR are not operators

2. x<500 OR x>650 AND y!=1000

Here x is not equal to 500

3. x<=500 || x>650 && y !=1000

Here bracket is not used to separate the logical operator results.

Answer 18:

Here, System.out.printf("%.1f%%", 12.78); is the answer and it will print 12.78 as 12.8%

But these are not answers:

1. System.out.printf("%2.1d%", 12.78);//illegal format precision

2. System.out.printf("%.2f%%", 12.78); //12.78%

3. System.out.printf("%1.2d%", 12.78);//illegal format precison

Answer 19:

Here, System.out.printf("$%,.2f", 12.7801); is the correct answer it will print 12.7801 to $12.78.

But these are not correct answers :

1. System.out.printf("%f", 12.7801);//12.780100

2. System.out.printf("%.2f$$", 12.7801);//12.78$$

Upto two decimal places and $$also added

3. System.out.printf("$d", 12.7801);//$d

Here $d is not format specifier it will print as it is.

Answer 20:

NOT=

NOT

*&

!=

‘!=’ is the correct relational operator for ‘Not equal’operator and ‘!=’ is the correct answer.

But, ‘NOT=’ , ‘NOT’ ,’*&’ are invalid operators.