Scope in the analysis stage

A list of deliverables that the project will hand over to the client and end-user, including any time limits for the project.

Examples of deliverables in a project

Design, completed program, test plan, test results, and evaluation report.

Purpose of defining scope

To outline what the project will deliver and any time constraints.

To show how parameters move in and out of sub-programs.

What type of value does a function return?

A function can only return a single value .

Where are Actual Parameters declared and where can they be found?

Actual parameters are declared outside of a subprogram and used in the main program. Actual parameters are found in brackets on the same line as the function or procedure call .

Where do Formal Parameters exist and where are they located?

Formal parameters only exist within the subprogram. Formal parameters are found in brackets on the first line of the function or procedure definition .

Where are Global Variables declared? Where can they be accessed/updated?

Global variables are declared outside of sub-programs. Global variables can be accessed and updated at any place in the program.

List 2 disadvantages of Global Variables

They reduce modularity because o sub-programs cannot create local variables with the same name without them clashing. o global variables may be accidentally updated by code within a sub-program.

Where are Local Variables declared? Where are they accessed/updated?

Local variables are declared inside sub-programs. Local variables can only be accessed and updated within the sub-program they are declared within.

List 2 advantages of Local Variables

· Local variables can have the same name as local variables in other sub-programs without causing a clash or errors. · When a sub-program has completed execution, local variables are removed from memory.

How do you limit the scope of a variable?

· Using local variables instead of global variables · Using parameter passing

List 4 benefits of sub-programs

Maintainability, Efficiency, Testing and Modularity

Maintainability benefits

Changes can be made to sub-programs without affecting the rest of the program.

· Code written within a sub-program can be re-used multiple times. · allows fewer lines of code to be typed. This removes repetition by calling the same sub-program more than once (with different actual parameters)

· Each sub-program can be tested separately making it easier to locate errors and debug.

· Different programmers can work on different sub-programs simultaneously. · Local variables and formal parameters within sub programs can have the same name without clashing with other sub programs. · Local variables can only be accessed within their own sub-program preventing unexpected changes in other parts of the main code.

Modulus Pre-defined function - what does it do?

Modulus is used to find the remainder from a division calculation.

One of the four debugging techniques which can help to fix code errors is a Breakpoint, what does this do?

· Program halts at a specified line of code. · This allows variable values to be inspected and compared with trace table values. Using a breakpoint to record values in a trace table means recording values of all variables each time the breakpoint halts the execution of the code:

One of the four debugging techniques which can help to fix code errors is a Dry Run, what does this do?

· Program code is printed out. · Manually work through each line of code, recording expected variable values in a trace table.

One of the four debugging techniques which can help to fix code errors is a Watchpoint, what does this do?

· Program halts when a variable value changes to meet a specified condition. · This allows variable values to be inspected and compared with trace table values. Using a watchpoint to record values in a trace table means recording values of all variables each time the watchpoint halts the execution of the code:

Step 1 of Fetch Execute Cycle

The processor sets up the address bus with the required address .

Step 3 of the Fetch Execute Cycle

An instruction is fetched from the memory location using the data bus and stored in the instruction register

Step 2 of Fetch Execute Cycle

The processor activates the read line on the control bus .

Step 4 of Fetch Execute Cycle

The instruction in the instruction register is then interpreted by the decoder and carried out .

Software Development Concepts Flashcard

Student preview

34 questions

Show all answers

1.

FLASHCARD QUESTION

Front

Why would you revisit a stage in the Software Development Process

Back

Earlier stages in the Iterative process can be revisited to make improvements and correct errors.

2.

FLASHCARD QUESTION

Front

How is Progress Measured in Iterative Methodology

Back

Iterative is a predictive methodology. It relies on early planning of the future in detail and follows a strict plan and deadlines.

3.

FLASHCARD QUESTION

Front

Iterative vs Agile: Changes

Back

In Iterative, changes can only be made before development. In Agile, changes can be introduced during development.

4.

FLASHCARD QUESTION

Front

Iterative vs Agile: Client Feedback

Back

Iterative has limited client involvement. Agile involves constant client feedback.

5.

FLASHCARD QUESTION

Front

Iterative vs Agile: Documentation

Back

Iterative requires extensive documentation. Agile requires minimal documentation.

6.

FLASHCARD QUESTION

Front

Iterative vs Agile: Testing

Back

Iterative testing is done after completion. Agile testing is ongoing with each feature.

7.

FLASHCARD QUESTION

Front

Iterative vs Agile: Team Interaction

Back

Iterative teams work independently. Agile teams collaborate with clients.

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