Which of these are the two Numeric Data types?
Integer and Real
Character and Integer
Real and Character
String and Character
What is Boolean data?
Data that can have up to two values
Data that can only have two values
Data that allows us to store more than one item of data
Data used store characters, digits and punctuation symbols
Which of these variables would use a String?
Variable: TotalPrice (The cost of the tickets booked by the customer)
Variable: SeatNumber (For example F7, meaning the seat is in row F, number 7)
Variable: SeatAvailable (Whether a seat can be booked)
Variable: NoTickets (The number of tickets wanted)
What is a serial file?
Files in which records are stored in the order in which they were entered
Files in which records have been placed in the file according to some mathematical hash algorithm
Files in which records are stored according to some key field
Files in which records are stored according to some key field and where one or more indexes have been created to make searching even more efficient
How would we reference the value 18 from the image?
24
42
18
8
What are the four items which need to be stated when defining an array?
Name of array
Data type of contents
Dimensions
Maximum number of elements/size of array/bounds of array
Length of array
Number of values
Variable types
Location of array
What are three advantages of using an array rather than 100 separate variables?
Code is easier to manage
Can use iteration
Code will be more easily scaleable
Code will be more accurate
Can use more variables
Allow individual data items to be accessed
What does a record do?
Stores a series of similar data items together under one identifier
Stores several different related data items under one identifier
Stores a series of similar data items together under multiple identifiers
Stores several different related data items under multiple identifiers
What is an integer used to store?
Whole numbers
Numbers that may have a decimal point
Alphanumeric data types are used to store textual data
What does the first row of the table tells us?
The position of each item of the array
The position of each item of the record
The position of each variable of the array
The position of each variable of the record
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