Question

QUESTION 1

1. What does the following code segment output?

   int red, blue;

   red = 7;

   blue = red + 2 * 5

   red++;

   blue = blue + red;

   cout << blue;

4 points   

QUESTION 2

1. Is the following statement true or false?

   The Boolean expression in the following if statement will be true for all values of x in the range from 10 to 20 (including the endpoints) and false for all other values:

   int x;

   if (x >= 10 && x <= 20)

   True

   False

4 points   

QUESTION 3

1. Give the appropriate order of steps when a C++ function call is made:

         -       1.       2.       3.       4.      

   Function return value is returned

   
         -       1.       2.       3.       4.      

   Function code runs

   
         -       1.       2.       3.       4.      

   Call by reference parameter values are returned

   
         -       1.       2.       3.       4.      

   Parameter passing

4 points   

QUESTION 4

1. Which of the following C++ statement sequences has legal syntax?

   	1.	double this; int that; cin >> this >> that;
   	2.	int x, y; cin << x << y;
   	3.	int x, y; cin << "x = " << x << " y = " << y;
   	4.	int one, two; cin >> one, two;

4 points   

QUESTION 5

1. What is the output from the following C++ code:

   if (7 > 3)

   cout << "Hello";

   cout << "Goodbye":

   		HelloGoodbye
   		[Nothing will be printed]
   		Hello
   		Goodbye

4 points   

QUESTION 6

1. What does the following output?

   int x = 2;

   char letter = 'w';

   cout << letter << "x" << x;

4 points   

QUESTION 7

1. What is the value of the following expression:

   42 % 6

4 points   

QUESTION 8

1. Select all of the following which are legal variable names in C++.

   		HELLOTHERE
   		Hello There
   		Hello+There
   		HelloThere
   		Hello_There
   		Hello-There

6 points   

QUESTION 9

1. How many times will the following code print Hello?

   int x = 2;

   do

   {

      x = x + 4;

   cout << "Hello";

   }

   while (x < 9);

4 points   

QUESTION 10

1. Match the following variable descriptions to the appropriate C++ type.

   -       A.       B.       C.       D.	Baseball score
   -       A.       B.       C.       D.	yes or no answer
   -       A.       B.       C.       D.	last name initial
   -       A.       B.       C.       D.	price of a gallon of gas

   A.	double
   B.	bool
   C.	char
   D.	int

4 points   

QUESTION 11

1. Given the following control associated with a for statement, how many times will the loop code execute?

   int x;

   for (x = 2; x < 6; x++)

4 points   

QUESTION 12

1. Consider the following function call (assume that the call is correct):

   answer = myFun (x, y, z);

   Indicate whether the following statement is true or false:

   Parameters x, y, and z will be passed by position to the three parameters in the function definition of myFun.

   True

   False

4 points   

QUESTION 13

1. Consider the following function call (assume that the call is correct):

   answer = myFun (x, y, z);

   Indicate whether the following statement is true or false:

   The return value from myFun will be assigned to answer.

   True

   False

4 points   

QUESTION 14

1. Match the statement type to the description.

   -       A.       B.       C.       D.       E.	Assignment
   -       A.       B.       C.       D.       E.	do-while
   -       A.       B.       C.       D.       E.	while
   -       A.       B.       C.       D.       E.	if-else
   -       A.       B.       C.       D.       E.	switch

   A.	Conditional statement that makes choices based on Boolean expressions
   B.	Conditional statement which makes a choice based on matching
   C.	Repetitive statement with Boolean expression at the top
   D.	Repetitive statement which executes at least one
   E.	Gives a value to a variable

5 points   

QUESTION 15

1. Show the output for the following code. Use a '$' character to represent each space. Assume all other code is correct and the iomanip library has been included.

   double x = 7.6;

   cout << showpoint << fixed << setprecision (3);

   cout << setw (6) << x;

4 points   

QUESTION 16

1. What will be the value of x after the following code executes:

   int x;

   x = 3;

   x += 7;

   x = x - 2;

4 points   

QUESTION 17

1. Is the following statement true or false?

   When we have the following start of a switch statement:

   switch (var)

   it is legal C++ for var to be of type int.

   True

   False

4 points   

QUESTION 18

1. Here is a C++ function protoype:

   int runOut (double x, int& y);

   Which of the following could possibly be a legal call to the function runOut?

   		z = runOut (x, y, z);
   		runOut (x, &y);
   		cow = runOut (y, x);
   		y = runOut (x);

4 points   

QUESTION 19

1. Is the following statement true or false?

   The Boolean expression in the following if statement will be true for all integer values of x in the range from 1 to 3 (including the endpoints) and false for all other values:

   int x;

   if (x == 1 || 2 || 3)

   True

   False

4 points   

QUESTION 20

1. What is the output for the following code:

   if (!(7 < 10))

   cout << "blue";

   else

   {

   cout << "red";

   cout << "green";

   }

   		red
   		blue
   		redgreen
   		green

4 points   

QUESTION 21

1. What value should a running sum variable be initialized to?

4 points   

QUESTION 22

1. What will be printed by the following code segment:

   int x = 5;

   while (x < 30)

   {

      x = x + 9;

   }

   cout << x;

4 points   

QUESTION 23

1. Is the following statement true or false?

   C++ is case sensitive in regards to variable names.

   True

   False

2 points   

QUESTION 24

1. What is the typical ordering of the following function parts in a C++ program?

         -       1.       2.       3.      

   call

   
         -       1.       2.       3.      

   prototype

   
         -       1.       2.       3.      

   definition

3 points   

QUESTION 25

1. What will be the value of x after the following statements execute:

   int x;

   x = 2 * 3 - 15 / 5 + 2 * 4;

Answer 1

int red, blue; // Two variable named red and blue is declared

red = 7; // 7 is assigned to red variable

blue = red + 2 *5; // * has higher presedence than +, so blue = 7 + (2 * 5) = 17

red ++ ; // Value of red is incremented by 1, so now red contains 8.

blue = blue + red; // Previously blue = 17, red = 8, Now blue = 17 + 8 = 25

cout<<blue; // This will print the value of blue variable which is 25. So answer is 25.

2. Answer: True

if (x > = 10 && x<=20) // This means x can take any integer value between 10 and 20 and including 10 and 20. So if statement is true for all values of x in range from 10 to 20, including 10 and 20.