LESSON 8: VARIABLES AND CONSTANT

Question 1

introduced flowcharts in 1921.

Answer 1

Frank Gilberth

Question 2

Flowcharts are called ______ at the beginning.

Answer 2

Process Flow Charts

Question 3

define the visual appearance and behavior of flowchart symbols themselves

Answer 3

Symbol properties

Question 4

represent the data or information flowing through the flowchart

Answer 4

Data properties

Question 5

This symbol is used to mark the start and the end of the list of instructions. Start is used to mark the starting point and the End
is of the line flowchart.

Answer 5

Terminal Block

Question 6

This shows the direction of the flowchart

Answer 6

Flow lines

Question 7

The parallelogram symbol is used for input and output instruction. For input the instruction that can be used is Read or Input, followed by a list of variables separated by comma. For output the
instruction that can be used is Display or Print, followed by a list of variables and or
text that will be displayed or printed.

Answer 7

Input/Output Block

Question 8

This symbol is used to process
calculations. Formulas are usually entered in this section of the flowchart. Formulas include variables that will be replaced by figures entered by the user. Activities that are be performed are also included.

Answer 8

Processing Block

Question 9

A diamond shaped symbol used to indicate decisions. Done in question form and is answerable by yes or no. Uses logical relations such as equal, not equal, greater than, greater than equal, less than and less than equal.

Answer 9

Decision Block

Question 10

Flowcharts are written from top to button, left to right. Once the bottom of the left side is reached continuation of the flowchart can be at the right side of the same page.

Answer 10

On-Page Connector

Question 11

This symbol is used if the flowchart is to be continued on the next page.

Answer 11

Off Page Connector

Question 12

• This variable type holds a value of true or false.
• Internally these are actually stored as the numbers 1 and 0 representing true and false respectively.
  -Boolean values are used in conditional statements to decide whether particular parts of Visual Basic code should be executed ore not.

Answer 12

Visual Basic Boolean variable

Question 13

Rules when naming the variables in Visual Basic
2012

Answer 13

• It must be less than 255 characters
• No spacing is allowed
• It must not begin with a number
• Period is not permitted

Question 14

• This variable type holds a single character (such as the letter “B”).
• The value of a Char can be any character.
• Internally, a number in the range of 0 to 65,553 is used to represent the character value as defined by
  the ASCII table.

Answer 14

Char variable

Question 15

• This variable type holds a positive number in the range 0 to 255.
• Due to limited range, byte variable should be used with caution.
• An attempt to assign a negative value or a value greater than 255 to a Visual Basic Byte variable will
  result in an error.

Answer 15

Byte variable

Question 16

• This variable type holds a date and time value.
• Dates are declared in the form #mm/dd/yyyy#. For example, May 23,2007 would be declared as
  #5/23/2007#.
• Visual Basic provides a number of mechanisms for working with Date variables (such as calculating a
  date six months from today’s date).

Answer 16

Visual Basic Date variable

Question 17

• This variable type can store either a whole number or a decimal number up to 29 decimal places.
• When working with whole numbers, however, it is recommended that the Integer variable type be
  used as this is more memory efficient than the Decimal variable type.

Answer 17

Decimal variable

Question 18

• This variable type is used to store either very large numbers, or small numbers requiring more than 28
  decimal places.
• To be precise, it can store positive integers in the range 4.9406564581246544E-324 to-4.94065645841246544E-324.
• Double variables are typically used when developing scientific applications using visual basic and, as such, are generally not used by the average developer.

Answer 18

Visual Basic Double variable

Question 19

• This variable type is used to store whole numbers between-2,147,483,648 and 2,147,483,648.
• The integer variable cannot be used to store numbers containing decimals.

Answer 19

Visual Basic Integer variable

Question 19

• It is a catch-all variable type which can be used to store a value of any data type.
• Due to its flexibility it reserves more memory than most variable types.
• For this reason, it is more efficient to use the correct variable type for the value you need to store
  rather than use the Object variable type.

Answer 19

Object variable

Question 20

This variable type is used to store whole numbers ranging from -9,233,372,036,854,775,808 to
9,233,372,036,854,775,807.

Answer 20

Visual Basic Long variable

Question 20

This variable type is used to store whole numbers ranging from -32,768 to 32,767.

Answer 20

Short variable

Question 21

• This variable type stores multiple characters that make up words or sentences.
• String variables are encapsulated in double-quotation marks (“). For example “Hello, this is a test”.

Answer 21

String variable

Question 22

When you declare a variable in a procedure, the variable is called

Answer 22

Procedure-Level Variable.

Question 23

have procedure scope because they can be used only by the
procedure in which they are declared Procedure-level variables are typically declared
at the beginning of a procedure, and they remain in the computer’s internal memory
only while the procedure is running.

Answer 23

Procedure-level variables

Question 24

indicates where the variable can be used in an application’s cod

Answer 24

Variable’s Scope

Question 25

indicates how long the variable remains in the computer’s internal memory.

Answer 25

Lifetime

Question 26

In programming, variables can be declared using

Answer 26

Dim, Private, or Static keywords.

Question 27

are used for procedure-level and class-level variables, respectively

Answer 27

Dim and Private

Question 28

is used for declaring a special type of procedure-level variable called a Static Variable.

Answer 28

Static keyword

Question 29

procedure-level variables
that remain in memory and retain their value even after the procedure ends.

Answer 29

Static variables

Question 30

is a memory location inside the computer. You create this by using the CONST statement.

Answer 30

Named Constant

Question 31

are used to perform many of the familiar arithmetic operations that
involve the calculation of numeric values represented by literals, variables, other expressions, functions and property of calls, and constants.

Answer 31

Arithmetic Operator