Final Exam Solution

TCOs 1, 6) _____ provides quick access to programming language definitions within the code editor. (Points : 5)
Intellisense
Bookmark
Break point
Step through




Question 2.2. (TCOs 1, 6) What does IDE stand for? (Points : 5)
Interior Design Environment
Integrated Development Environment
Integrated Design Environment
Interior Development Environment




Question 3.3. (TCOs 1, 6) In the context of object-oriented programming, the Solution Explorer window _____. (Points : 5)
exposes the properties of the control
shows the physical components of the program
lists the events associated with a control
lists the controls on the form




Question 4.4. (TCOs 2, 3) When the correct arithmetic operator precedence rules are applied, what will be the value of the following expression?

5 * 6 / 2 + 1 (Points : 5)
16
15
10
12
31




Question 5.5. (TCOs 2, 3) The keyword “void” means that a method _____. (Points : 5)
clears all variables it is passed
does not return a value
is invalid
releases memory after it is called




Question 6.6. (TCOs 2, 3) Before you start writing a program, it’s important to first thoroughly _____. (Points : 5)
analyze the problem
design the solution
specify the problem
All of the above




Question 7.7. (TCO 4) What will be the output of this code?

int x = 5, y = 15;
if (x y)
{
Console.Write("A, ");
if (3 * x = y)
Console.Write("B, ");
else
Console.Write("C, ");
}
else
Console.Write("D, ");

(Points : 5)
B,
B, D,
A, B, D,
D,




Question 8.8. (TCO 4) Which part of this expression will be evaluated first?

if (b <= c && d = e)

(Points : 5)
b <= c
c || d
d = e
if()




Question 9.9. (TCO 5) In this code, the outer FOR loop executes _____ times.

int i = 1, j = 1;
for (i = 1; i < 4; i++)
{
for (j = 1; j < 4; j++)
{
Console.Write("{0}{1} ", i, j);
}
}

(Points : 5)
three
four
nine
16




Question 10.10. (TCO 5) With a _____ structure, the programmer specifies the number of times the block of code in a loop will repeat. (Points : 5)
do-while
for
goto
while




Question 1.1. (TCOs 7, 8) Given the following method call, which would be a valid prototype for the calcLetterGrade method?

char letterGrade;
letterGrade = calcLetterGrade(95.5);

(Points : 5)
public static int calcLetterGrade(double val);
public static char calcLetterGrade(double val);
public static double calcLetterGrade(double val);
public static char calcLetterGrade(int val);




Question 2.2. (TCOs 7, 8) Which is probably a call to a mutator method? (Points : 5)
double yards = yds.calcYards();
double yds = GetNoOfYards();
CarpetCalculator plush = new CarpetCalculator();
SetNoOfYards(double yds);




Question 3.3. (TCOs 7, 8) Because Main() and MyFunction() store counter in _____, the output of this code will be _____.

static void Main()
{
int counter = 8;
Console.Write("{0} ", counter);
counter++;
MyFunction(ref counter);
counter++;
Console.Write("{0} ", counter);
Console.Read();
}

public static void MyFunction(ref int counter)
{
Console.Write("{0} ", counter);
counter++;
}

(Points : 5)
different memory locations, 8 9 10
the same memory location, 8 9 10
different memory locations, 8 9 11
the same memory location, 8 9 11




Question 4.4. (TCOs 9, 10) Type _____ to append “New Year’s Day” to an existing list of holidays in the “listHolidays” ListBox object at run time. (Points : 5)
listHolidays.Items.Add(“New Year’s Day”);
listHolidays.Items.Append(“New Year’s Day”);
listHolidays.Add(“New Year’s Day”);
listHolidays.Append(“New Year’s Day”);




Question 5.5. (TCOs 9, 10) Often, multiple _____ objects are placed together on a _____ control. The user can only select one of them. (Points : 5)
TextBox, ListBox
RadioButton, GroupBox
ListBox, GroupBox
CheckBox, TextBox





Question 6.6. (TCOs 9, 10) Which of the following statements will retrieve the selected item of comboBoxEntrees and place it in a myString variable called “myStr”? (Points : 5)
myString myStr = comboBoxEntrees.SelectedItem;
myString myStr = comboBoxEntrees.Selection();
myString myStr = comboBoxEntrees.Text;
myString myStr = comboBoxEntrees.getText();





Question 7.7. (TCOs 11, 12) In the following code, "val" represents the _____.

int[] numTVs = {2,3,5,6,4,5};
foreach (int val in numTVs)
Console.Write("{0} ",val);

(Points : 5)
array name
memory address of an array element
number of times the loop will execute
value of an array element




Question 8.8. (TCOs 11, 12) To pass the entire myInfo array to the PrintElements method, replace the commented line below with _____.

static void Main()
{
int[] myInfo = {6,7,8,9};
//call PrintElements
}
public static void PrintElements(params int[] item)
{
for (int i=0; i<item.Length; i++)
Console.Write("{0} ",item[i]);
}

(Points : 5)
PrintElements(myInfo);
PrintElements(myInfo[0]);
PrintElements(ref myInfo);
PrintElements(6,7,8,9);




Question 9.9. (TCOs 11, 12) What will be the output of this code?

int[] courses = {2,3,5,6,4,5};
Array.Sort(courses);
foreach (int val in courses)
Console.Write("{0} ", val);

(Points : 5)
2 3 4 5 5 6
5 4 6 5 3 2
6 5 5 4 3 2
2 3 5 6 4 5




Question 10.10. (TCO 13) To print out the time a file called “timeSheet.txt” was created, write _____. (Points : 5)
Console.WriteLine(File.GetCreationTime("timeSheet.txt"));
Console.WriteLine(GetFileInfo(“timeSheet.txt”);
Console.WriteLine(GetCreationTime(“timeSheet.txt”);
Console.WriteLine(File.FileInfo(“timeSheet.txt”);




Question 11.11. (TCO 13) The _____ namespace enables your C# program to work with files and directories. (Points : 5)
System.FILE.IO
System.Collections.Generic
System
System.IO




Question 12.12. (TCO 13) To avoid runtime errors when accessing text files, make sure your C# program _____. (Points : 5)
encloses file access statements inside try…catch blocks
opens a file before writing to it
handles all file IO exceptions
All of the above


1. (TCO 3) Show the source code for a C# console application called “Area” to display the area of a parking lot with length 203.5 ft. and width 30.5 ft. (Note that area is length times width.)

· Declare and initialize appropriate variables for length and width.

· Include at least three descriptive comments.

· State what your program displays when it runs.

· State how you would use the debugger to check the values of your variables as your program runs.

(Points : 20)





Question 2.2. (TCO 5) Describe two types of loops that can be used to print every third integer from 0 to 300 (i.e., 0, 3, 6, 9, etc.), each on its own line. Which would be a better choice and why? Write the code using that type of loop. (Points : 20)





Question 3.3. (TCO 8) Briefly describe how parameter passing by-value and by-reference are accomplished in memory. Write statement 1 to call method A below. Write statement 2 to call method B. Which method uses pass by-value? Which method uses pass by-reference?

static void Main()
{
int balance = 20000;
//statement 1
//statement 2
}

//method A
public static void getBalance(ref int balance)
{
balance = balance + 500;
}

//method B
public static int getBalance(int balance)
{
return (balance + 500);
}

(Points : 20)





Question 4.4. (TCO 9) Identify an example of one of each of the following GUI design errors in Figure 2:

· inconsistency

· misalignment

· clutter



How could each of the three errors be corrected to improve the user experience?

Image Description

(Points : 20)





Question 5.5. (TCO 2) Although the following code compiles and runs, the programmer made some major readability errors. Describe at least three changes that would make it easier for other programmers to read and understand the code.

class Program

{

static void Main() //main

{

int a;

int Double = 10; // ints

for(int i = 0;i < Double;i++) /*loop */{

a=method(i);

Console.WriteLine(a);

}

Console.Read(); //read

}

public static int method(int a) //method

{

return (int)(Math.Pow((double)a,4.0));

}

}



(Points : 20)





Question 6.6. (TCO 11) Write a C# program to store an array of integers 1 through 9. Use an appropriate loop to sum the values in the list. Print out the sum. (Points : 20)