Q&A Hero

Q: For the array to be accessible by each button's Click event procedure, it will need to be declared as a class-level array.

Q: You should have each button's Click event procedure determine the number of elements in an array.

Q: You can determine the highest subscript in a one-dimensional array by subtracting 2 from the number of array elements.

Q: Class-level variables retain their values and remain in the computer's internal memory until the application ends.

Q: You declare a class-level memory location using the Dim keyword.

Q: You declare class-level variables in the form's Declarations section.

Q: Two or more procedures in an application may need to use the same variable or array.

Q: Variables and arrays are declared in procedures when the memory locations are needed only by the procedure that declared them.

Q: All the data in an array do not have to be the same data type.

Q: In some applications, you may want to use an array to store items that are related but have different data types, such as employee IDs and salary amounts.

Q: Attempting to access an element with an invalid subscript results in a(n) ____. a. warning b. run time error c. increase in array size d. code correction

Q: If a subscript is valid, it is said to be in ____. a. order b. value c. index d. range

Q: In an array, another term for subscript is ____. a. catalog b. guide c. index d. key

Q: A form's ____ event occurs when an application is started and the form is displayed the first time. a. Start b. Click c. Load d. Begin

Q: Memory locations declared in the form's Declarations section have ____, which means they can be used by any of the procedures in the form's Code Editor window. a. local scope b. class scope c. priority d. procedure scope

Q: To sort a one-dimensional array in descending order, you first sort the values in ascending order, and then use the ____ method to reverse the array elements. a. Array.Reverse b. Array.Change c. Array.Descending d. Array.Flip

Q: Arranging data in a specific order is called ____. a. arranging b. ordering c. organizing d. sorting

Q: To sort the values in a one-dimensional array in ascending order, you use the ____ method. a. Array.Order b. Array.Arrange c. Array.Sort d. Array.Organize

Q: The number of elements in a one-dimensional array is stored in the array's ____. a. Load event b. scope c. highest subscript d. Length property

Q: Assigning initial values to an array is often referred to as ____ the array. a. populating b. initialing c. inserting d. filling

Q: The first variable in a one-dimensional array is assigned a subscript of ____. a. 0 b. 1 c. 2 d. 3

Q: The ____ indicates the variable's position in the array. a. superscript b. subscript c. array identifier d. identifier

Q: You distinguish one variable in a one-dimensional array from another variable in the array using a unique number, called a(n) ____. a. superscript b. identifier c. array identifier d. subscript

Q: When you group together related variables, the group is referred to as a(n) ____ of variables. a. array b. group c. set d. collection

Q: A simple variable, also called a ____ variable, is one that is unrelated to any other variable in memory. a. scale b. scaling c. scalar d. plain

Q: The For"¦Next statement is not appropriate when you do not know the exact number of times the loop instructions should be repeated.

Q: If the subscript of an array is not in the acceptable range, the procedure should try to access the array element to verify the correct range.

Q: When an array is sorted in descending order, the first element in the array contains the largest value and the last element contains the smallest value.

Q: In most applications, the values stored in an array come from a file on the computer's disk and are assigned to the array after it is declared.

Q: The contents of the variables (elements) in an array cannot be displayed.

Q: The elements in a numeric array are initialized to the number 1.

Q: The number of elements is always one number more than the array's highest subscript.

Q: You use the Private keyword to create a class-level array.

Q: A procedure-level memory location has class scope, which means it can be used only within the procedure in which it is declared.

Q: To refer to the first variable in a one-dimensional String array named strFriends, you use strFriends(0)read "strFriends sub zero."

Q: Superscripts are assigned by the computer when an array is created in internal memory.

Q: Each variable in an array has the same name and data type.

Q: The most commonly used arrays in business applications are three-dimensional.

Q: In the cases when you encounter situations where some variables are related, it is easier and more efficient to treat the related variables separately.

Q: At times, you will encounter situations where some of the variables in an application are related to each other.

Q: A Sub procedure's header includes the As dataType section.

Q: The header and footer in a function are identical to the header and footer in a sub procedure.

Q: Function procedures are referred to more simply as structures.

Q: A ____ under a variable in the Code Editor window indicates that it has not been declared. a. bold color b. jagged line c. green color d. dashed line

Q: You know that a variable is passed by value when the keyword ____ appears before the parameter in the function's header. a. ByRef b. ByValue c. ByVal d. ByReference

Q: When invoking a function, the number of arguments should agree with the number of parameters listed in the function's ____. a. data type b. parameterList c. return type d. return list

Q: Like Sub procedure names, function names typically begin with a(n) ____. a. noun b. verb c. adjective d. adverb

Q: In a function, the data type of the expression in the Return statement must agree with the data type specified in the ____ section of the header. a. Type As dataType b. Return As dataType c. As dataType (Return) d. As dataType

Q: The information a function receives is listed in the ____ in the header. a. parameterList b. data type c. return type d. function name

Q: If the function returns a Double number, you enter ____ at the end of the header. a. Number Double b. As Double c. (Double) d. Type as DoubleType(Double)

Q: If the function returns a string, you enter ____ at the end of the header. a. String As b. (String) c. As String d. Type As StringType

Q: You use the ____ section of the function's header to specify the data type of the value returned by the function. a. Like b. Dim c. Type d. As dataType

Q: A ____'s header includes the As dataType section. a. procedure b. function c. caller d. program

Q: The sub procedure's header and footer contain the ____ keyword. a. Sub b. Function c. SubProcedure d. Subroutine

Q: The function's header and footer contain the ____ keyword. a. Sub b. FunctionProcedure c. SubFunction d. Function

Q: A(n) ____ procedure does not return a value. a. Sub b. Function c. Assignment d. Static

Q: A(n) ____ procedure returns a value after performing its assigned task. a. Return b. Sub c. Function d. Assignment

Q: In most cases, it is better to use a function rather than a Sub procedure that passes a variable by reference.

Q: Most programmers pass a variable by reference only when a procedure needs to produce more than one result.

Q: Fewer unintentional errors occur in applications when memory locations have the maximum scope needed.

Q: Allowing more than one procedure to change the contents of a memory location can lead to subtle errors that are difficult to find, especially in large applications.

Q: When changing the Sub keyword in a header to Function, the Code Editor automatically changes the Sub keyword in the footer to the Function keyword.

Q: The statement that invokes a function will always assign the function's return value to a variable.

Q: When invoking a function, the data type and position of each argument does not need to agree with the data type and position of its corresponding parameter.

Q: You invoke a function that you create in exactly the same way as you invoke one of Visual Basic's built-in functions.

Q: After creating a function, you can invoke it from one or more places in an application's code.

Q: As is true with a Sub procedure, a function can receive information either by value or by reference.

Q: In most cases, the last statement within a function is Update expression.

Q: The ____ keyword tells the computer to pass the variable's address rather than a copy of its contents. a. ByRef b. ByVal c. ByValue d. ByLoc

Q: You pass a variable by ____ when you want the receiving procedure to change the contents of the variable. a. content b. name c. value d. reference

Q: When you pass a variable by reference, you pass its ____ in the computer's internal memory. a. value b. data c. name d. location

Q: Radio buttons and check boxes have a ____ event that occurs when the value in the control's Checked property changes. a. CheckedChanged b. TextChanged c. ChangedChecked d. TextChecked

Q: When you pass a variable by ____, the computer passes a copy of the variable's contents to the receiving procedure. a. value b. contents c. location d. reference

Q: To pass a variable by value in Visual Basic, you include the keyword ____ before the name of its corresponding parameter in the receiving procedure's parameterList. a. Val b. ByVal c. Value d. ByValue

Q: You pass a variable by ____ when the receiving procedure needs to know the variable's contents, but the receiving procedure does not need to change the contents. a. reference b. address c. value d. location

Q: Passing a variable's address is referred to as passing by ____. a. address b. value c. reference d. location

Q: A text box's ____ event occurs whenever a change is made to the contents of the text box. a. TextModified b. TextChanged c. CheckedChanged d. ChangedText

Q: The parameters in a procedure header have ____ scope, which means they can be used only by the procedure in which they are declared. a. local b. limited c. procedure d. specific

Q: Each parameter stores information that is passed to an independent Sub procedure by the ____ statement. a. Call b. Pass c. Send d. Go

Q: Unlike the procedure header, which varies with each procedure, the procedure footer for an independent Sub procedure is always ____. a. End b. End Sub c. Sub Foot d. Foot Sub