An algorithm written in a programming-style construct, but it does not follow a specific programming language.

A diagram that is used to show the breakdown of an algorithm into steps.

Looks at each item in a list sequentially until the desired search item is located or until all the items have been searched.

A more efficient way of searching for items in a long list by successively dividing it into two subsets until the search item is located.

1. Compare the first two items in the list. If they are in order, leave them as they are. If not, swap them. 2. Repeat step 1 for items 2 and 3 in the list. 3. Continue applying step 1 to the rest of the items in the list.

1. Look at the second item in a list. 2. Compare it to all items before it and insert the item into the right place. 3. Repeat step 2 for the third, fourth, fifth etc. items until the last item in the list has been inserted into the correct place.

1. Split the list in half to create two subsets. 2. Continue to split the subsets in half, until only individual items remain. 3. Merge individual items together in pairs, putting them back together in order. 4. Continue to merge the pairs together, with each subset being sorted in order. 5. Once all subsets have been combined, the list should be in order.

A data item with values that can be changed by the program during normal execution.

A data item with values that cannot be changed by the program during normal execution.

A series of instructions in which each instruction is processed after the previous one has been executed.

A selection is required when an instruction depends on a condition being true or false in order to be processed.

The process of repeating a set of instructions for a fixed number of times or until there is a desired outcome.

A whole number with no decimal point.

Contain numeric data in a decimal form.

A collection of alphanumeric data characters and symbols. Usually enclosed in quotation marks.

Contain a single character from a character set, such as ASCII and Unicode.

Used to represent one of two values, TRUE or FALSE.

Used to transfer one data type into another data type.

The association of a piece of data with a variable or constant, e.g. index = 0.

A condition-controlled loop where the condition is tested at the end, so the loop is always executed at least once.

A count-controlled loop where a count is automatically incremented each time the loop is performed.

while...endwhile loop

A condition-controlled loop where the condition is checked before the loop is entered.

Returns the remainder after the division of one number by another, e.g. 17 MOD 3 = 2.

Returns the quotient, e.g. 17 DIV 3 = 5.

Structured Query Language - used for creating, maintaining, and accessing databases.

Subroutines (subprograms)

A self-contained sequence of program instructions that performs a specific task.

A subprogram that returns a value to the main program when it is called.

A subprogram that carries out a specific task but does not return values to the main program.

A variable that is used only within a subprogram. When the subprogram has completed its work, the local variable is discarded.

A variable that is available anywhere in a program including any subprograms.

The placing together of two separate objects so that they can be treated as one, e.g., two string variables can be joined end-to-end to produce a larger string.

A data structure used to hold several items of the same data type.

An organized collection of structured information, or data, typically stored electronically in a computer system.

A collection of data objects relating to a particular subject or entity.

One item of information in a record.

The uses of subprograms

- Allow the production of structured code - Make programs shorter - Make program code easier to read and test - Shorten the development time of a program - Make testing easier - Make code more readable

- % symbol: substitute for one or many characters - * symbol: represent 'all fields' Example: WHERE TutorGroup LIKE "%X"; returns all records with a tutor group ending with an X.

Substrings or portions of a string can be snipped out. Example: mystring = "RosieandJack"; snip = mystring.substring(2,4); print(snip) - prints 'siea'.

The process of determining the identity of a user.

The process of checking that any data that is input is sensible, reasonable, and appropriate.

Ensure that data has been entered.

Ensure that an input falls within a required range.

Ensure that a specified number of characters have been entered.

Ensures that the software produces the expected results and meets the needs of the users.

COMP2 Flashcards Flashcards

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72 questions

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1.

FLASHCARD QUESTION

Front

Computational thinking

Back

A process used to solve complex problems in a structured, logical way.

2.

FLASHCARD QUESTION

Front

Abstraction

Back

Picking out the important bits of information from the problem, ignoring the specific details that don’t matter.

3.

FLASHCARD QUESTION

Front

Decomposition

Back

Breaking a complex problem down into smaller problems and solving each one individually.

4.

FLASHCARD QUESTION

Front

Algorithmic thinking

Back

A logical way of getting from the problem to the solution.

5.

FLASHCARD QUESTION

Front

Structure diagrams

Back

A visual design technique used to show the steps needed to solve a problem.

6.

FLASHCARD QUESTION

Front

Syntax error

Back

When the compiler or interpreter does not understand something you’ve typed because it doesn’t follow the rules or grammar of the programming language.

7.

FLASHCARD QUESTION

Front

Logic error

Back

Mistakes in the design of a program that cause the program to behave in an unexpected way.

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