SDD

Question 1

What are the different stages in the iterative design method

Answer 1

A dance in the dark every Monday
Analysis
Design
Implementation
Testing
Documentation
Evaluation
Maintenance

Question 2

Evaluation: What does a ROBUST program have

Answer 2

A Robust programme deals with incorrect inputs and or variable types and should cope with this

Question 3

Evaluation: what should reliable code have

Answer 3

Software is reliable if it always produces the expected result. IT should not stop due to design faults.

Question 4

Evaluation: what should a Correct program have

Answer 4

the program should meet the requirements of the software

Question 5

Evaluation: what should a readable program have

Answer 5

The program is easily understood by another programmer. eg: white spaces, internal commentary

Question 6

Evaluation: Portable

Answer 6

The program can be easily adapted to run on a different operating system.

Question 7

Evaluation: Maintainable

Answer 7

The program is easily changed and adapted

Question 8

Evaluation: Efficient

Answer 8

The program should run without using excessive system resources. e.g. Processor time, Ram, hard disk space or bandwidth

Question 9

What’s the difference between Iterative and Agile methodologies in reference to Client Interaction

Answer 9

Iterative: Involved during analysis and end of project only
Agile: Regularly involved and consulted throughout project. Provides feedback at every stage

Question 10

What’s the difference between Iterative and Agile methodologies in reference to Teamwork

Answer 10

Iterative: Independent specialist teams work in isolation on each phase of the project.
Agile: Teams consisting of a range of specialists collaborate and communicate

Question 11

What’s the difference between Iterative and Agile methodologies in reference to Documentation.

Answer 11

Iterative: Comprehensive documentation produced throughout the project
Agile: Concise documentation kept to a minimum.

Question 12

What’s the difference between Iterative and Agile methodologies in reference to Adaptive vs predictive.

Answer 12

Predictive methodology (Iterative) - the analysis phase used to predict the development pathway.
Adaptive methodology (Agile) - allows for ongoing changes to be made as the project requires

Question 13

How to set up the record Cars with license plate, manufacturer and colour columns.

Answer 13

RECORD Car IS
{STRING license plate, STRING manufacturer, STRING colour}

Question 13

What’s the difference between Iterative and Agile methodologies in reference to Testing

Answer 13

Iterative: Testing is carried out when the implementation phase of the project is complete.
Agile: Testing is carried out when the implementation phase of the project is complete.

Question 13

What does the predefined function ORD do

Answer 13

changes character to ASCII
e.g. A -> 65

Question 14

How to set up an array of records called allcars for 100 spaces in relation to the record Cars

Answer 14

DIM allcars(100) as Cars

Question 15

What does the predefined function CHR do

Answer 15

changes ASCII to character
e.g. 65 -> A

Question 16

How to read an array from a file

Answer 16

OPEN filename
FOR counter FROM 1 to 10 DO
RECEIVE array(counter) From filename
END FOR
CLOSE filename

Question 17

How to write an array to a file

Answer 17

OPEN filename
FOR counter FROM 1 to 10 DO
SEND array(counter) to filename
END FOR
CLOSE filename

Question 18

What does Systemic testing mean

Answer 18

Systemic testing is where tests are done in a way which is planned and which can be documented as a result.

Question 19

What does Comprehensive testing mean

Answer 19

Comprehensive testing is when every aspect of the software is tested.

Question 20

How to word an end user requirement answer

Answer 20

The end user would like to see…

Question 21

How to word a Functional Requirement answer

Answer 21

The database must have a query to…

Question 22

What is a primary key?

Answer 22

A primary key is a field in a table that contains a piece of data that is unique for every record.

Question 23

What is a foreign key?

Answer 23

A foreign key is a field in a table that is the primary key of another table. It is used with the primary key to link the tables together.

Question 24

What is a compound key?

Answer 24

A compound key combines two or more attributes to identify each entity occurrence. In a relational database, a compound key is a primary key that comprises of two or more foreign keys from another table.

Question 25

How to calculate the range of values

Answer 25

2 to the power of bits
divided by 2 for negative
divided by 2 and minus 1 for positive.

Question 26

When moving a real number forward in decimals, the exponent is

Answer 26

negative

Question 27

2 advantages of a bitmap graphics are

Answer 27

You can edit individual pixels
Produces more realistic photographic images

Question 28

2 disadvantages of a bitmap graphic are

Answer 28

File sizes are larger as the content of every pixel has to be stored, even blank ones.
Scaling- the photo loses quality as it gets bigger.

Question 29

2 advantages of a vector graph

Answer 29

File size is smaller than bitmap
Scaling is independent meaning you can scale images without blurring

Question 30

2 disadvantages of a vector graph

Answer 30

You can’t edit individual pixels in the image.
Difficult to create photo-realistic images as it only uses shapes.

Question 31

Fetch execute cycle: read

Answer 31

The address bus stores/carries/holds the address of the memory location of the data (currently being read from)

The readline is activated on the control bus

The databus transfers data to the processor/register

The instruction is decoded and executed

Question 32

Fetch execute cycle: write

Answer 32

The address stores/carries/holds the address of the memory location of the data (currently being written to)

The write line is activated on the control bus

The required data is placed on the Data bus

The Databus transfers data to Memory Location

Question 33

Computer misuse act (3 points)

Answer 33

Unauthorised access to computer material

Unauthorised access with intent to commit further offence

Unauthorised modification of computer material

Question 34

What’s the definition of a symmetric key

Answer 34

encryption used the same key to encrypt and to decrypt code

Question 35

What’s the definition of a public key

Answer 35

The sender uses one key to encrypt

Question 36

What’s the definition of a private key

Answer 36

The receiver decrypts the data

Question 37

What are advantages of modular code (2)

Answer 37

Each part of the solution can be tested independently
Limits accessibility of local variables