Question

QUESTION 1

1. What will be displayed as a result of executing the following code?

   int   x = 5, y = 20;

   x += 32;

   y /= 4;

   cout <<"x = " << x <<"y = " << y;

   	A.	x = 32, y = 4
   	B.	x = 9, y = 52
   	C.	x = 37, y = 5
   	D.	x = 160, y = 80

8 points   

QUESTION 2

1. What will be the displayed when the following code is executed?

   const int x = 22, y = 4;

   y += x;

   cout <<"x= " << x <<" , y = " << y;

   		x = 22, y = 4
   		x = 22, y = 26
   		x = 22, y = 88
   		Nothing, this is an error

8 points   

QUESTION 3

1. If chr is a character variable, which of the following if statements is written correctly?

   	A.	if (chr = "a")
   	B.	if (chr == "a")
   	C.	if (chr = 'a')
   	D.	if (chr == 'a')

8 points   

QUESTION 4

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

   int bonus, sales = 85000;

   char dept = 'S';

   if (sales > 100000)

       if (dept == 'R')

           bonus = 2000;

      else

           bonus = 1500;

   else if (sales > 75000)

       if (dept == 'R')

           bonus = 1250;

        else

           bonus = 1000;

   else

        bonus = 0;

   	A.	2000
   	B.	1500
   	C.	1250
   	D.	1000

8 points   

QUESTION 5

1. 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?

   	A.	((x >= 500 && x <= 650) && (y != 1000))
   	B.	((x > 500 AND x < 650) OR !(y.equal(1000)))
   	C.	((x > 500 && x < 650) || (y != 1000))
   	D.	((x < 500 && x > 650) || !(y == 1000))

8 points   

QUESTION 6

1. What will be printed when the following code is executed?

   int y = 10;

   if ( y == 10)

   {

      int x = 30;

      x += y;

   }

   cout<<"x = ";

   cout<<x;

   	A.	x = 30
   	B.	x = 40
   	C.	x = 20
   	D.	x is unknown when the last statement is executed

8 points   

QUESTION 7

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

   double discountRate = 0.0;

   int purchase = 1250;

   char cust = 'N';

   if (purchase > 1000)

       if (cust == 'Y')

           discountRate = .05;

       else discountRate = .04;

   else if (purchase > 750)

       if (cust == 'Y')

           discountRate = .04;

       else

           discountRate = .03;

   else

       discountRate = 0;

   	A.	.05
   	B.	.04
   	C.	.03
   	D.	0

8 points   

QUESTION 8

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

   double discountRate;

   char custType = 'B';

   switch (custType)

   {

        case 'A':

             discountRate = .08;

             break;

        case 'B':

             discountRate = .06;

        case 'C':

             discountRate = .04;

        default:

             discountRate = 0.0;

   }

   		.08
   		.06
   		.04
   		0.0

8 points   

QUESTION 9

1. What will be the values of x and y as a result of the following code?

   int x = 25, y = 8;

   x += y;

   		x = 25, y = 8
   		x = 34, y = 8
   		x = 33, y = 8
   		x = 34, y = 9

8 points   

QUESTION 10

1. Assume a program has the following variable defenition:

   int a, b =2;

   float c = 4.2;

   and the following statement:

   a = b * c;

   What will be stored in a?

   	A.	8.4
   	B.	8
   	C.	0
   	D.	None of the above

8 points   

QUESTION 11

1. What the following statement will be evaluated to where T is true and F is false:

   T&&T||F&&T

   	A.	true
   	B.	false
   	C.	this statement is wrong
   	D.	not applicable in C++ language

8 points   

QUESTION 12

1. Which of the following is a string literal constant?

   	A.	“Visual C++”
   	B.	“A”
   	C.	“2.3456”
   	D.	all of the above

6 points   

QUESTION 13

1. The statement i+=1; is equivalent to

   	A.	i = i + i;
   	B.	i = i + 1;
   	C.	i = i - 1;
   	D.	i --;

8 points   

QUESTION 14

1. What will the following code display?

   Assume this code in included within the main function.

   int x = 10, y;

   if(x < 10)
   y = 1;
   if (x>= 10)
   y = 2;
   cout << "y is " <<y;

10 points   

QUESTION 15

1. Convert the following if/else if statement into a switch statement:

   If (option ==1)

   {

                   cout<< “ You selected option 1”;

   }

   else if (option==2 || option == 3)

   {

               cout<< “ You selected option 2 or option 3”;

   }

   else if (option == 4)

   {

             cout<< “ You selected option 4”;

   }

   else

   {    

               cout<< “ You selected other option”;

   }

   
   

14 points   

QUESTION 16

1. Write the if/else statement as the conditional expression that performs the same option

   result = x < y ? x * 5 : a + b;

14 points   

QUESTION 17

1. Write a C++ program that asks the user to enter two numbers. The program should use the conditional operator to determine which number is the smaller and which is the larger.

20 points   

QUESTION 18

1. Write a cout statement so that the variable totalAge is displayed in a field of 12 spaces, in fixed point notation, with a precision of 4 decimal places.

12 points   

QUESTION 19

1. Write an if/else statement that compares the value of the variables   soldYesterday and   soldToday , and based upon that comparison assigns   salesTrend the value -1 or 1 .

   -1 represents the case where   soldYesterday is greater than   soldToday ;

   1 represents the case where   soldYesterday is not greater than   soldToday .

14 points   

QUESTION 20

1. Write nested if statements that perform the following tests:

   If amount1 is greater than 10 and amount2 is less than 100, display the greater of the two.

Answer 1

QUESTION1

int   x = 5, y = 20;

x += 32;

y /= 4;

cout <<"x = " << x <<"y = " << y;

solution:

x=5

x+=32 =>x =x+32 => x=5+32=37

y=20

y/=4=>y=y/4=>y=20/4=>y=5

Therefore x=37 y=5 Option C is correct

QUESTION 2:

const int x = 22, y = 4;

y += x;

cout <<"x= " << x <<" , y = " << y;

Here there will be an error because y is constant and cannot be changed

Hence option D is correct

QUESTION 3:

option D is correct if(char=='a')

option A is wrong because if(char="a") here in if statement it is assignment operator ..in if statement only equal operator is valid more over char variables should be compared with ' ' and not " " Therefore option B is also wrong

option C is wrong because in if statement it  is assignment operator

QUESTION 4:

int bonus, sales = 85000;

char dept = 'S';

if (sales > 100000)

    if (dept == 'R')

        bonus = 2000;

   else

        bonus = 1500;

else if (sales > 75000)

    if (dept == 'R')

        bonus = 1250;

     else

        bonus = 1000;

else

     bonus = 0;

solution:

option D is correct

the first if does not satisfy because given sales=85000

it goes to else if statement which is sales>75000 this satisfies because sales=85000

now in this else if statement given dept is not R so else will be executed and bonus=1000;

first four questions are answered according to the HomeworkLib policy

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