C# keywords include | Computer Science homework help
1. (TCOs 1, 6) C# keywords include _____ and _____. (Points : 5)
case, for
catch, trying
int, nullset
try, dynamic
Question 2.2. (TCOs 1, 6) Set a variable to a value with the symbol _____, and test equality with _____. (Points : 5)
=, =
==, ==
==, =
=, ==
Question 3.3. (TCOs 1, 6) Since data stored in _____ is lost when the computer’s power is turned off, that type of memory is considered to be _____. (Points : 5)
RAM, volatile
auxiliary storage, volatile
RAM, nonvolatile
auxiliary storage, nonvolatile
Question 4.4. (TCOs 2, 3) Which escape sequence is used to display a backslash within a string literal on the output console? (Points : 5)
Special characters cannot be added to string literals.
n
\
Return character
Question 5.5. (TCOs 2, 3) The keyword “void” means that a method _____. (Points : 5)
does not return a value
is invalid
releases memory after it is called
clears all variables it is passed
Question 6.6. (TCOs 2, 3) A computer uses ____ numerals to represent and manipulate data. (Points : 5)
two
eight
10
16
Question 7.7. (TCO 4) Given that a is 5, b is 6, and c is 8, which of the following is false? (Points : 5)
c >= 8
a >= 0
a <= (b * 2)
(1 + a) != b
Question 8.8. (TCO 4) A home improvement store is giving a discount of 20% on all purchases of more than $250. Which of the following is the appropriate structure to use to program the statement? (Points : 5)
Loop
Method
Decision
Sequence
Question 9.9. (TCO 5) Your program keeps asking for Student IDs until he/she enters “AAAAA.” In this context, the “AAAAA” is used as a(n) _____. (Points : 5)
accumulator
counter
integer data type
sentinel value
Question 10.10. (TCO 5) (TCO 5) The _____ structure is a _____ loop, meaning that its conditional expression is tested after the statements inside its body execute. (Points : 5)
do-while, posttest
do-while, pretest
while, posttest
while, pretest
Page 2
Question 1.1. (TCOs 7, 8) Which of the following is a valid overloaded version of this method?
char CalculateGrade(double val1, double val2)
(Points : 5)
char CalculateGrade(int val1)
char CalculateMyGrade(int val1, double val2)
char CalculateMyGrade(double val1)
double CalculateGrade(double val1, double val2)
Question 2.2. (TCOs 7, 8) Which is probably a call to an accessor method? (Points : 5)
SetNoOfYards(double yds);
double yds = GetNoOfYards();
CarpetCalculator plush = new CarpetCalculator();
double yards = yds.calcYards();
Question 3.3. (TCOs 7, 8) Which is not a valid name for a method or function? (Points : 5)
mod1
mod 1
MyMod1
mod_1
Question 4.4. (TCOs 9, 10) In Design mode, set the words that will appear in a textbox by modifying its _____ property in the Properties window. (Points : 5)
label
font
name
text
Question 5.5. (TCOs 9, 10) When the user of your fast-food ordering GUI selects the “checkBoxBurger” CheckBox, the string “Burger” should appear in the “listBoxOrder” ListBox. To implement this functionality, write _____ in the ckBoxBurger_CheckedChanged() event handler. (Points : 5)
if
(ckBoxBurger.isChecked)
{
listBoxOrder.Items.Add(“Burger”);
}
if (ckBoxBurger.Checked)
{
listBoxOrder.Add(“Burger”);
}
if (ckBoxBurger.isChecked())
{
listBoxOrder.Text = “Burger”;
}
if (ckBoxBurger.Checked)
{
listBoxOrder.Items.Add(“Burger”);
}
Question 6.6. (TCOs 9, 10) The first time a programmer double clicks on a button object in design mode, the button’s default event handler method _____ is added to the code. (Points : 5)
Click()
Clicked()
Double_Click()
Double_Clicked()
Question 7.7. (TCOs 11, 12) To pass the first and second elements of the myData array to the DisplayItems method, replace the commented line below with _____.
static void
Main()
{
int[] myData = {1,2,3,4};
//call DisplayItems
}
public static void DisplayItems(params
int[] item)
{
for (inti=0; i<item.Length; i++)
Console.Write(“{0} “,item[i]);
}
(Points : 5)
DisplayItems(myData, 1, 2);
DisplayItems(myData[0],myData[1]);
DisplayItems(myData, 0, 1);
DisplayItems(myData[1],myData[2]);
Question 8.8. (TCOs 11, 12) The size of an _____ can be determined when the program is written or at run time, whereas the size of an _____ must be determined when the program is written. (Points : 5)
arraylist, array
array, arraylist
array, array class
array class, array
Question 9.9. (TCOs 11, 12) Given the following declaration, what is/are the value(s) of age[1,0]?
int[,] age = { {2, 3, 6, 7},
{5, 8, 9, 4} };
(Points : 5)
2
5
5 2
2 5
Question 10.10. (TCO 13) Before your C# program attempts to append data to a file, it should first _____. (Points : 5)
callFile.Append to ensure the file can be written to.
callFile.Create() to create the file.
callFile.Exists() to make sure the file exists.
callFile.Write() to make sure the file can be written to.
Question 11.11. (TCO 13) The following C# statement will _____.
Console.WriteLine(Directory.Exists(Directory.GetCurrentDirectory()));
(Points : 5)
print out “true”
print out “true” if there are files in the current directory
print out “true” if the current directory has subdirectories
throw an exception
Question 12.12. (TCO 13) To print out the time and date a file called “plans.txt” was last written to, write _____. (Points : 5)
Console.WriteLine(File.GetAccessInfo(“plans.txt”);
Console.WriteLine(GetAccessTime(“plans.txt”);
Console.WriteLine(File.GetLastWriteTime(“plans.txt”));
Console.WriteLine(GetLastWriteTime (“plans.txt”);
1.(TCO 3) Show the source code for a C# console application names ‘Sibs’ that prints your frist name on the first line, your last name on the second line, and the number of siblings you have on the third line
Declare and initialize an appropriate variable for your number of siblings
Include at leat three descriptive comments
Stat how you would use the error list window to identify and correct errors in your code(points: 20)
2.(TCO 5) Using WHILE loop, write the C# code required to print every second integer starting with 0 until the number is greater than 200(i.e.. 0, 5, 10, 15 etc ) Describe another type loop that can also be used to implement this functionality which would be more efficient? (points: 20)
6.(TCO 11) Write a C# program to store an array of these integers 23,45,67,89 and 10. Use an appropriate loop to multiply all of the values in the list. Print out the result (Points: 20)
