C# Exam 1

Front 1

Know how many dimensions an arrays can have in C#

Back 1

Single, Multidimensional

Front 2

Know how many significant digits float and double variables have

Back 2

A double is 64 and single precision (float) is 32 bits.

Front 3

Know how to declare and initialize a two-dimensional array

Back 3

array2D = new int[,] { { 1, 2 }, { 3, 4 }, { 5, 6 }, { 7, 8 } };

Front 4

Know how to display the Visual Studio 2010 IDE Solution Explorer

Back 4

Menu: Tools -> Options -> Projects and Solutions -> General

Front 5

Know how to store monetary values in a C# program

Back 5

decimal

Front 6

Know how to use an if statement in a C# program

Back 6

using System;

class Program
{
static void Main()
{
int value = 10 / 2;
if (value == 5)
{
Console.WriteLine(true);
}
}

Front 7

Know how to use multidimensional arrays

Back 7

int[, ,] array1 = new int[4, 2, 3];

Front 8

Know how to use Visual Studio 2010 IDE help

Back 8

#Define

Front 9

Know the difference between passing an argument by reference and by value

Back 9

If I tell you the URL, I'm passing by reference. You can use that URL to see the same web page I can see. If that page is changed, we both see the changes. If you delete the URL, all you're doing is destroying your reference to that page - you're not deleting the actual page itself.

If I print out the page and give you the printout, I'm passing by value. Your page is a disconnected copy of the original. You won't see any subsequent changes, and any changes that you make (e.g. scribbling on your printout) will not show up on the original page. If you destroy the printout, you have actually destroyed your copy of the object - but the original web page remains intact.

Front 10

Know the difference between reference type and value type variables

Back 10

"Variables that are based on value types directly contain values. Assigning one value type variable to another copies the contained value. This differs from the assignment of reference type variables, which copies a reference to the object but not the object itself."

Front 11

Know the difference between simple types and object types in C#

Back 11

A value type is usually whatever type reside on the Stack .

A primitive type is a type defined at the programming language level, often it is even a value type, directly supported by the compiler of the language.

Front 12

Know the minimum number of classes in a C# program

Back 12

double and decimal?

Front 13

Know the number of bits in an int

Back 13

32bit

Front 14

Know the relationship between early Windows and DOS

Back 14

?

Front 15

Know the relationship between early Windows and Macintosh

Back 15

?

Front 16

Know the relationship between variables and data types

Back 16

?

Front 17

Know the supported image formats in Visual Studio 2010

Back 17

BMP

GIF

JPEG

PNG

TIFF

Front 18

Know the syntax for variable-length argument list methods

Back 18

?

Front 19

Know the syntax of the Console.Write, Console.WriteLine methods

Back 19

writeline, writes to program
.write writes with a int/double/bool

Front 20

Know the syntax of the for loop

Back 20

class ForLoopTest
{
static void Main()
{
for (int i = 1; i <= 5; i++)
{
Console.WriteLine(i);
}

Front 21

Know what 6 basic units of a computer are

Back 21

Motherboard,processor,PSU,RAM,Optical Drive,Hard drive

Front 22

Know what a C# program Main method is

Back 22

Every C# application must contain a single Main method specifying where program execution is to begin. In C#, Main is capitalized, while Java uses lowercase main.
Main can only return int or void, and has an optional string array argument to represent command-line parameters:

Front 23

Know what a computer's ALU is

Back 23

Abbreviation of arithmetic logic unit, the part of a computer that performs all arithmetic computations, such as addition and multiplication, and all comparison operations. The ALU is one component of the CPU (central processing unit).

Front 24

Know what a computer program is

Back 24

?

Front 25

Know what a console application is

Back 25

?

Front 26

Know what a GUI is

Back 26

graphic user interface

Front 27

Know what a PictureBox control is

Back 27

displaying an image

Front 28

Know what a semicolon (;) in a C# program is used for

Back 28

ends line/ breaks statements

Front 29

Know what an IDE is

Back 29

is a software application that provides comprehensive facilities to computer programmers for software development. An IDE normally consists of a source code editor, build automation tools and a debugger. Most modern IDEs offer Intelligent code completion features.

Front 30

Know what an infinite loop is

Back 30

while(true)
{

}

Front 31

Know what an off-by-one error is

Back 31

is a logic error involving the discrete equivalent of a boundary condition. It often occurs in computer programming when an iterative loop iterates one time too many or too few. This problem could arise when a programmer makes mistakes such as using "is less than or equal to" where "is less than" should have been used in a comparison or fails to take into account that a sequence starts at zero rather than one (as with array indices in many languages). This can also occur in a mathematical context.

Front 32

Know what control structures are

Back 32

loops if and switches

Control structures are one of the most fundamental concepts in any programming language you will come across. If you want to know C#, and if you want to learn to program with any language, you must have a firm grip on the control structures of the language.

Generally speaking, if you learn them in one language, you will pick them up in different languages very quickly.

Front 33

Know what data type to use for a counting loop's control

Back 33

for loop

Front 34

Know what default constructors are

Back 34

If a class contains no instance constructor declarations, a default instance constructor is automatically provided. That default constructor simply invokes the parameterless constructor of the direct base class. If the direct base class does not have an accessible parameterless instance constructor, a compile-time error occurs. If the class is abstract then the declared accessibility for the default constructor is protected. Otherwise, the declared accessibility for the default constructor is public. Thus, the default constructor is always of the form

Front 35

Know what local variable are

Back 35

A local-variable-declaration declares one or more local variables.

Front 36

Know what method overloading is

Back 36

First, overloaded methods are separate in the compiled program. A method receiving a string parameter is separate from one receiving no parameter or an int. The methods are stored at different locations within the metadata.

Front 37

Know what pre-test and post-test loops are

Back 37

A pre-test loop tests for a condition prior to running a block of code. A post test loop runs the test after running a block of code.

Front 38

Know what program control means

Back 38

?

Front 39

Know what recursive methods are

Back 39

A recursive method calls itself. Recursive methods are used extensively in programming and in compilers. They help with complex problems. They solve problems and puzzles with brute force. They exhaust all possibilities.

Front 40

Know what static methods and variables are

Back 40

A static class is basically the same as a non-static class, but there is one difference: a static class cannot be instantiated. In other words, you cannot use the new keyword to create a variable of the class type.

Finally i understand the static variable.....static variable shared the value of it among all instances of the class.

Front 41

Know what strongly typed languages are

Back 41

it is not possible for the programmer to work around the restrictions imposed by the type system. This term is almost always used to describe statically typed languages.

Front 42

Know what the default value of a reference is

Back 42

http://msdn.microsoft.com/en-us/library/83fhsxwc.aspx

Front 43

Know what the Microsoft .NET Intermediate Language is

Back 43

?

Front 44

Know why the use of the goto statement can cause poblems

Back 44

Probably the most famous criticism of GOTO is a 1968 letter by Edsger Dijkstra called Go To Statement Considered Harmful. In that letter Dijkstra argued that unrestricted GOTO statements should be abolished from higher-level languages because they complicated the task of analyzing and verifying the correctness of programs (particularly those involving loops). An alternative viewpoint is presented in Donald Knuth's Structured Programming with go to Statements which analyzes many common programming tasks and finds that in some of them GOTO is the optimal language construct to use.

Front 45

Understand array indices

Back 45

?

Front 46

Understand method calls

Back 46

Calling a method on an object is like accessing a field. After the object name, add a period, the name of the method, and parentheses. Arguments are listed within the parentheses, and are separated by commas. The methods of the Motorcycle class can therefore be called as in the following example: