1.
Visual Studio 2010 comes in various editions with different features. Choose all valid editions:
Correct Answer(s)
A. Express Edition
B. Professional Edition
C. Premium Edition
E. Ultimate Edition
Explanation
Visual Studio 2010 comes in various editions with different features. The Express Edition is a valid edition of Visual Studio 2010, which is a free version with limited features. The Professional Edition is also a valid edition, which includes advanced features for professional developers. The Premium Edition is another valid edition, which offers additional features such as database development and testing tools. The Ultimate Edition is the highest-tier edition, which includes all features and tools available in Visual Studio 2010. Therefore, all four editions mentioned in the answer - Express, Professional, Premium, and Ultimate - are valid editions of Visual Studio 2010.
2.
IDE stands for what?
Correct Answer
D. Integrated Development Environment
Explanation
An IDE is a software application that provides comprehensive tools and features for software development. It integrates various tools, such as code editors, compilers, debuggers, and build automation tools, into a single platform, making it easier for developers to write, test, and debug code. Therefore, the correct answer is Integrated Development Environment.
3.
CLR stands for what?:
Correct Answer
C. Common Language Runtime
Explanation
CLR stands for Common Language Runtime. It is a component of the .NET framework that provides an environment for executing managed code. Managed code is written in high-level languages like C# or VB.NET and is compiled into Intermediate Language (IL) code. CLR is responsible for managing memory, handling exceptions, performing garbage collection, and providing other services that are necessary for running managed code. It also provides a common runtime environment for different programming languages to interoperate seamlessly.
4.
If you want to create a C# Form you would use what?:
Correct Answer
A. Form Designer
Explanation
To create a C# Form, you would use the Form Designer. This tool allows developers to visually design the user interface of a Windows Form application. It provides a drag-and-drop interface for adding controls, setting properties, and arranging the layout of the form. The Form Designer simplifies the process of creating a user-friendly and visually appealing form by providing a graphical interface for designing the form's layout and appearance.
5.
Visual Studio 2010 supports these programming languages. Choose all valid editions:
Correct Answer(s)
A. Visual Basic
B. Visual C#
C. Visual C++
E. Visual F#
Explanation
Visual Studio 2010 supports multiple programming languages including Visual Basic, Visual C#, Visual C++, and Visual F#. These languages are valid editions in Visual Studio 2010. Visual J+ is not a valid edition in Visual Studio 2010.
6.
If you want to write C# code you would use what?:
Correct Answer
C. Code Editor
Explanation
The code editor is the correct answer because it is the tool used for writing C# code. It provides features such as syntax highlighting, code completion, and debugging capabilities, making it easier for developers to write and edit their code. The solutions explorer, forms designer, and console designer are other tools in the development environment that serve different purposes but are not specifically used for writing code in C#.
7.
What is the purpose of the .NET Framework Class Library?
Correct Answer
A. It provides pre-written code that can be used by .NET applications
Explanation
The purpose of the .NET Framework Class Library is to provide pre-written code that can be used by .NET applications. This allows developers to save time and effort by utilizing existing code for common functionalities, such as file manipulation, database connectivity, and user interface components. By using the pre-written code from the Class Library, developers can focus on the specific requirements of their applications rather than reinventing the wheel.
8.
Before a C# application can be run, it must be compiled into a language called:
Correct Answer
B. Microsoft Intermediate Language
Explanation
Before a C# application can be run, it must be compiled into a language called Microsoft Intermediate Language (MSIL). MSIL is a low-level, platform-independent language that is generated by the C# compiler. It is not directly executable by the computer, but it can be further compiled into machine code by the Just-In-Time (JIT) compiler when the application is run. This allows the C# code to be executed on different platforms and architectures without needing to recompile it for each specific environment.
9.
The .NET Framework Class Library consists of
Correct Answer
C. Classes that are organized into namespaces
Explanation
The correct answer is "classes that are organized into namespaces." The .NET Framework Class Library is a collection of reusable classes, interfaces, and value types that are organized into namespaces. Namespaces are used to organize and group related classes together, providing a way to avoid naming conflicts and make the code more organized and manageable. Classes within the .NET Framework Class Library are grouped into these namespaces, making it easier for developers to locate and use the desired functionality when building .NET applications.
10.
The primary components of the .NET Framework are the .NET Framework Class Library and the
Correct Answer
C. Common Language Runtime
Explanation
The correct answer is the Common Language Runtime. The Common Language Runtime (CLR) is a key component of the .NET Framework that provides an execution environment for applications. It manages memory, handles exceptions, and performs other essential tasks to ensure the smooth execution of .NET programs. The .NET Framework Class Library is also an important component, but it is not the primary component as stated in the question. The other options, Command Language Runtime, Windows Forms classes, and ASP.NET classes, are not the primary components of the .NET Framework.
11.
What is the name of the Visual Studio window that contains controls that you can drag on to a form?
Correct Answer
C. Toolbox
Explanation
The Toolbox window in Visual Studio contains controls that can be dragged onto a form. These controls are pre-built components that can be used to add functionality and interactivity to the form. The Toolbox provides a convenient way to access and add these controls to the design surface of the form, making it easier for developers to build the user interface of their application.
12.
Two properties that are common to both forms and controls are the
Correct Answer
B. Name and Text Properties
Explanation
Both forms and controls have the properties of "Name" and "Text". The "Name" property allows the user to assign a unique identifier to the form or control, which can be used for referencing and manipulating it in the code. The "Text" property, on the other hand, allows the user to set the display text for the form or control, which is what the user sees on the screen. These properties are common to both forms and controls, allowing for consistency and ease of use in programming and designing user interfaces.
13.
To create an access key that will move the focus to a text box, you
Correct Answer
B. Set the access key in the Text property of the label immediately before the text box
Explanation
Setting the access key in the Text property of the label immediately before the text box allows the user to use the access key to move the focus directly to the text box. This means that when the user presses the access key, the focus will be automatically placed in the text box, allowing them to start typing without having to manually click on the text box.
14.
The label control has a TabStop property.
Correct Answer
B. False
Explanation
The statement is false because the label control does not have a TabStop property. The TabStop property is used to determine whether a control can receive focus when the user presses the Tab key. Since a label control is typically used for displaying text and does not require user interaction, it does not have a TabStop property.
15.
Access keys let the user activate a control by
Correct Answer
C. Pressing Alt + another key
Explanation
Access keys allow the user to activate a control by pressing the Alt key along with another key. This combination of keys provides a shortcut for accessing specific controls or functionalities within a software application or website. By pressing the Alt key, the user can navigate through menus, buttons, or other interactive elements by using the corresponding access key assigned to them. This helps improve accessibility and efficiency for users who prefer to navigate using keyboard shortcuts rather than mouse clicks.
16.
To change the file name for a form, project, or solution you use the
Correct Answer
C. Solution Explorer
Explanation
To change the file name for a form, project, or solution, the correct tool to use is the Solution Explorer. The Solution Explorer provides a hierarchical view of the files and folders in a project or solution. It allows you to easily navigate through the project structure and make changes to file names, add or remove files, and organize the project.
17.
The Text property of a control determines
Correct Answer
B. The text that's displayed in the control
Explanation
The Text property of a control determines the text that is displayed in the control. This means that when the control is rendered on the screen, the value of the Text property will be shown to the user. It is used to provide information or instructions to the user, or to display dynamic content that can be updated programmatically.
18.
When you run a form after you’ve used the Form Designer to design it but haven’t added any code to it ,
the buttons don’t cause anything to happen, but otherwise the form works
Correct Answer
A. True
Explanation
When you run a form after designing it using the Form Designer but without adding any code to it, the buttons on the form will not trigger any specific actions or events. However, the rest of the form will still function as intended. This means that the form will be displayed and any other elements or functionality that were designed in the Form Designer will still be present and usable. The buttons, in this case, will not have any associated code to execute, so clicking on them will not cause any specific actions to occur. Therefore, the statement "the buttons don't cause anything to happen, but otherwise the form works" is true.
19.
What type of control is used to provide for user entry?
Correct Answer
D. Textbox
Explanation
A textbox is used to provide for user entry. It allows the user to input text or data into a form or application. Unlike a label, which only displays text, a textbox allows the user to interact with it by typing or editing text. Listbox and button controls do not directly provide for user entry, as a listbox displays a list of options for selection and a button triggers an action. Therefore, a textbox is the correct control for user entry.
20.
The CancelButton property of a form sets the button that will be activated if the user presses the _________________ key
Correct Answer
B. Esc
Explanation
The CancelButton property of a form sets the button that will be activated if the user presses the Esc key. This means that when the user is interacting with the form and presses the Esc key, the action associated with the CancelButton will be triggered. This is useful in situations where the user wants to cancel or close the form without submitting any changes or performing any further actions.
21.
To refer to a property of an object in your C# code, you code the
Correct Answer
C. Object name followed by a period and the property name
Explanation
In C#, to refer to a property of an object, you code the object name followed by a period and the property name. This syntax is used to access the members (properties and methods) of an object. By using the period, you can directly access the specific property of the object and perform operations on it.
22.
The following code calls the Focus method of the txtMonthlyInvestment control:
txtMonthlyInvestment.Focus();
Correct Answer
A. True
Explanation
This code snippet calls the Focus method of the txtMonthlyInvestment control, indicating that the control will receive the focus or become the active element on the page. Therefore, the correct answer is True.
23.
What is the term for a method that responds to events?
Correct Answer
C. Event handler
Explanation
An event handler is the term used to describe a method that responds to events. This method is responsible for executing a specific set of instructions when a particular event occurs. It is commonly used in programming to handle user interactions, such as button clicks or keystrokes, and perform the necessary actions in response to those events.
24.
A user entry that can't be converted to a number is a common cause of a runtime error
Correct Answer
A. True
Explanation
When a user enters a value that cannot be converted to a number (e.g., entering letters instead of digits), it can cause a runtime error. This is because the program expects a numeric input but receives an incompatible data type. The program may not be able to handle this unexpected input, leading to a runtime error. Therefore, it is true that a user entry that cannot be converted to a number is a common cause of a runtime error.
25.
What is another name for a runtime error?
Correct Answer
B. Exception
Explanation
A runtime error is commonly referred to as an exception. It is an error that occurs during the execution of a program, typically due to unexpected circumstances or invalid operations. Exceptions are used to handle and manage errors in a program, allowing for graceful handling of unexpected situations and preventing the program from crashing. Therefore, exception is another name for a runtime error.
26.
When an application encounters a problem that prevents a statement from being executed,
Correct Answer
D. A runtime error occurs
Explanation
When an application encounters a problem that prevents a statement from being executed, a runtime error occurs. This means that there is an error in the code that is causing the application to stop running or crash. Runtime errors can be caused by a variety of factors, such as invalid input, memory issues, or logic errors in the code. These errors often need to be debugged and fixed in order for the application to run correctly.
27.
A syntax error is identified in
Correct Answer
C. The Code Editor window and the Error List window
Explanation
A syntax error is identified in the Code Editor window and the Error List window. The Code Editor window is where the code is written and edited, so any syntax errors will be highlighted and displayed here. The Error List window, on the other hand, provides a list of all the errors in the code, including syntax errors. Therefore, both windows are used to identify syntax errors in the code.
28.
Which of the following is a valid comment?
Correct Answer
D. // This is a comment
Explanation
The correct answer is "// This is a comment" because in programming languages like C++, Java, and JavaScript, the double forward slash "//" is used to indicate a single-line comment. This means that anything written after the "//" will be ignored by the compiler or interpreter, making it a valid comment. The other options are not valid comments because they either lack the required syntax or do not follow the conventions of the programming language.
29.
To improve the readability of your C# code, it's recommended that you use all capital letters for variable names.
Correct Answer
B. False
Explanation
Using all capital letters for variable names is not recommended for improving the readability of C# code. It is a common convention to use camel case for variable names in C#, where the first letter of each word is capitalized except for the first word. This convention helps to make the code more readable and understandable for other developers. Using all capital letters can make the code harder to read and understand, as it may be perceived as shouting or emphasizing the variable name.
30.
To change the name of all instances of a variable name after you change the first instance, you can use?
Select the most efficient answer.
Correct Answer
B. Refactoring
Explanation
Refactoring is the most efficient answer because it refers to the process of restructuring and improving code without changing its external behavior. By using refactoring techniques, you can easily change the name of a variable throughout your codebase, ensuring consistency and avoiding errors. This approach allows for efficient and reliable updates to variable names, enhancing code readability and maintainability.
31.
Which values can a boolean data type contain (pick all that apply):
Correct Answer(s)
C. True
D. False
Explanation
A boolean data type can only contain two values, which are True and False. It cannot contain characters or numbers.
32.
Examine the first two lines of code and then compare it to the third line of code. Do they accomplish the same thing?
int iCount;
iCount = 10;
int iCount = 10;
Correct Answer
A. Yes
Explanation
The first two lines of code declare a variable called iCount and assign the value 10 to it. The third line of code combines the declaration and assignment into a single line. Both sets of code accomplish the same thing, which is initializing the variable iCount with the value 10. Therefore, the answer is yes, they accomplish the same thing.
33.
Choose the data types that can store numbers that have decimal places (pick the best choices all that apply):
Correct Answer(s)
I. Float
J. Double
K. Decimal
Explanation
The data types float, double, and decimal can store numbers that have decimal places. Float is a single-precision floating-point type that can store decimal numbers with a smaller range and precision. Double is a double-precision floating-point type that can store decimal numbers with a larger range and precision. Decimal is a high-precision decimal type that can store decimal numbers with the highest precision and a smaller range compared to float and double.
34.
Choose the data types that can store integers (pick all that apply):
Correct Answer(s)
A. Byte
B. Sbyte
C. Short
D. Ushort
E. Int
F. Uint
G. Long
H. Ulong
Explanation
The data types that can store integers are byte, sbyte, short, ushort, int, uint, long, and ulong. These data types are specifically designed to store whole numbers without decimal places. Float, double, and decimal are data types used to store floating-point numbers with decimal places. Char is used to store single characters, and bool is used to store boolean values (true or false).
35.
What data type should be used to store the value of 3.14 for the sake of efficiency?
Correct Answer
C. Float
Explanation
The data type "float" should be used to store the value of 3.14 for the sake of efficiency. Float is a data type that can store decimal numbers with a smaller range and precision compared to double or decimal. Since 3.14 is a relatively small decimal number and does not require high precision, using float would be more efficient in terms of memory usage and computational speed.
36.
The C# char data type supports the two-byte Unicode character set, which can store practically store any character from any language in the world.
Correct Answer
A. True
Explanation
The C# char data type is capable of storing the two-byte Unicode character set, which means it can accommodate characters from any language in the world. This makes the statement true.
37.
When assigning a value to a string data type you must enclose the value in what:
Correct Answer
B. "" double quotes
Explanation
When assigning a value to a string data type, the value must be enclosed in double quotes (""). Double quotes are used to indicate that the characters within them should be treated as a string. This is a common convention in many programming languages. Parentheses, braces, and single quotes are not used to enclose string values. Parentheses are used for grouping expressions, braces are used for defining blocks of code or data structures, and single quotes are used for enclosing character literals.
38.
What data types could be used to store the value of 3.14? (Pick all that apply):
Correct Answer(s)
A. Float
B. Double
D. Decimal
Explanation
The value of 3.14 can be stored in the data types float, double, and decimal. These data types are capable of storing decimal values with varying levels of precision. Float and double are used to store floating-point numbers, with double having a higher precision than float. Decimal is used to store decimal numbers with higher precision than float and double. Int and long are integer data types and cannot store decimal values, so they are not applicable in this case.
39.
The whole number 127 can be stored in what data types (pick all that apply):
Correct Answer(s)
A. Byte
B. Sbyte
C. Short
D. Ushort
E. Int
F. Uint
G. Long
H. Ulong
Explanation
The whole number 127 can be stored in data types that have a range large enough to accommodate it. These data types include byte, sbyte, short, ushort, int, uint, long, and ulong. These data types can store whole numbers within their respective ranges, and the value 127 falls within the range of each of these data types.
40.
A variable stores a value that can be change as the program executes.
Correct Answer
A. True
Explanation
A variable is a container that holds a value, and this value can be changed as the program runs. In programming, variables are used to store and manipulate data. By assigning different values to a variable throughout the program, we can update and modify the data as needed. Therefore, the statement that a variable stores a value that can be changed as the program executes is true.
41.
Is this a valid statement in C# (will it compile and work):
int iAge = 0, iCount = 10;
Correct Answer
A. Yes
Explanation
This statement is valid in C#. It declares two integer variables, iAge and iCount, and initializes them with the values 0 and 10 respectively. This code will compile and work without any issues.
42.
What data type should be used to store currency data?
Correct Answer
B. Decimal
Explanation
The data type "decimal" should be used to store currency data because it provides the most accurate representation of decimal numbers, including precise handling of decimal places. Unlike "double" and "float" which are floating-point types and can introduce rounding errors, "decimal" is a fixed-point type that ensures accurate calculations and avoids loss of precision. Additionally, "int" is not suitable for storing currency data as it only supports whole numbers and does not allow for decimal places.
43.
When assigning a value to a char data type you must enclose the value in what:
Correct Answer
D. '' single quotes
Explanation
The correct answer is '' single quotes because when assigning a value to a char data type, the value must be enclosed within single quotes. Single quotes indicate that the value is a character literal. Using any other type of quotation marks or brackets would result in a syntax error.
44.
Is this a valid statement in C# (will it compile and work):
string sName = 'Brian Candido';
Correct Answer
B. No
Explanation
The given statement is not valid in C#. In C#, single quotes ('') are used to represent characters, not strings. To represent a string, double quotes ("") should be used. Therefore, to make the statement valid, the string should be enclosed in double quotes like this: string sName = "Brian Candido";
45.
The value -26500 could be stored in what data types (pick all that apply):
Correct Answer(s)
C. Short
E. Int
G. Long
Explanation
Since the number is negative you don't want to put it into any unsigned integer data types. You could put the value into short, int and long data types. In this example the best choice would be short to efficiently store the value without wasting storage.
46.
Is this a valid statement in C# (will it compile and work):
char sLetter = "C";
Correct Answer
B. No
Explanation
The given statement is not valid in C#. In C#, a char variable can only store a single character enclosed in single quotes. The double quotes used in the statement indicate a string, not a character. To assign a character to the variable, it should be enclosed in single quotes like 'C'.
47.
Int i = 4;
int j = 8;
int k = 17;
Given the above variables, what is the value of x after the following statement is executed?
int x = i + j;
Correct Answer
B. 12
Explanation
The value of x after the statement "int x = i + j;" is executed is 12. This is because the variables i and j are assigned the values 4 and 8 respectively. The addition operation "i + j" evaluates to 12, which is then assigned to the variable x.
48.
Int i = 4;
int j = 8;
int k = 17;
Given the above variables, what is the value of x after the following statement is executed?
int x = j / i;
Correct Answer
D. 2
Explanation
The value of x after the statement is executed is 2. This is because the division operator (/) performs integer division, which discards any decimal places. Therefore, when j (8) is divided by i (4), the result is 2.
49.
Int i = 4;
int j = 8;
int k = 17;
Given the above variables, what is the value of x after the following statement is executed?
int x = i / j;
Correct Answer
B. 0
Explanation
The value of x after the statement "int x = i / j;" is executed is 0. This is because the division of the integer i (4) by the integer j (8) results in a quotient of 0. Since both i and j are integers, the division operation performs integer division, which discards any decimal remainder and only returns the whole number quotient. Therefore, the value of x is 0.
50.
Int i = 4;
int j = 8;
int k = 17;
Given the above variables, what is the value of x after the following statement is executed?
int x = k % j;
Correct Answer
A. 1
Explanation
The statement "int x = k % j;" calculates the remainder when k is divided by j. In this case, k is 17 and j is 8. When 17 is divided by 8, the remainder is 1. Therefore, the value of x after executing this statement is 1.