Software Development. Intermediate 2. Homework Booklet

Transcription

1 INT Computing Unit Homework Software Development Intermediate Homework Booklet

2 INT Computing Unit Homework Software Development Homework. Match up these descriptions of the stages of the software development process with the correct names (one has been done for you):. What three criteria will be used for evaluating software in this unit?. What is the relationship between pseudocode and a structure diagram? 4. Name two items of documentation usually provided with a software package, and describe what you would expect each one to contain What three types of testing should be applied to any software? 6. Describe two examples of maintenance that could be required on a game program. 6

3 INT Computing Unit Homework Software Development Design Homework When designing a program it is useful to represent the main steps of a program in turn. This is usually done in one of two ways PseudoCode (Falsecode) or Structure Diagrams Below are the main steps of making tea in both Pseudocode and Structure Diagrams Look at the steps the try the questions in your jotter Pseudocode Structure Diagram. Get mug from cupboard. Put tea bag in it. Boil Kettle 4. Pour water into mug 5. Stir Get mug from cupboard Put tea bag in it Making Tea Boil Kettle Pour water into mug Stir. Write Pseudocode for the following tasks a. Going to school b. Phoning a friend c. Working out how much it will cost to carpet a room. Draw Structure Diagrams to show a. Going to school b. Washing your hair c. Work out your wages for a week Keep your designs simple NO more than 6 Steps for each task!

4 INT Computing Unit Homework Software Development Homework Programming Task Homework colour changer In your jotters: Design, write and test a program which asks the user to enter a letter and sets the background colour to the input colour and displays a message. red if R or D is entered green if G or N is entered blue if B or E is entered yellow if Y or W is entered black if C, A or K is entered. The program should respond to both upper case and lower case inputs. Design Complete the Data Flow diagram Design Show your input and output messages as you expect them to appear on the screen Design Write the Pseudocode 4

5 INT Computing Unit Homework Implementation Write the program Testing Copy the table then complete the first columns of the table with values Test case Condition Expected Actual Comment r normal b normal B exceptional 6 6

6 INT Computing Unit Homework Software Development Homework 4. List the seven stages of the software development cycle in order.. Describe what a structured listing is.. Write the Pseudocode to listen to a song on a CD (use no more than 6 steps) 4. Describe how the User Interface of a program is evaluated. 5. What does the term adaptive maintenance mean? 6. Describe the difference between High Level Language and a Low Level Language. 7. Why must programs be translated to a low level language? 8. Name the types of Translator program. 9. Describe the different way in which the two types of translator program work. 0. Name High level and Low level programming language. 7

7 INT Computing Unit Homework Software Development Homework 5. What are the following programming languages used for: FORTRAN, PROLOG and COBOL. What is a macro?. What do the terms Source code and Object Code mean? 4. Give problems with programming in machine code 5. List advantages of High Level languages? 6. Describe the difference between a High level language and a low level language. 7. A program has been written to record scores of a dice roll, make up suitable sets of test data 8. At which stage of the software development cycle might a Text Editor be used? 9. Name types of value that should be tested when developing a program. 0. What is Corrective maintenance?

8 INT Computing Unit Homework Software Development Homework 6. Name and describe in order the 7 stages of the software development cycle. 7. Is the statement:- pre-defined functions such as ASC, CHR$, LEN, UCASE and LCASE are useful as they save programmers time TRUE or FALSE?. Describe one advantage of Structure Diagrams over Pseudocode as a method of representing program design 4. Is Source Code usually written on Low or High Level language? 5. Describe how using a macro can safe time. 6. Describe what you would expect to find in a) The User Guide b) The Technical Guide 7. Write the standard input validation algorithm 4 8. When a program repeats an action a known number of times would you use a Fixed loop or a Conditional loop?

9 INT Computing Unit Homework Software Development Homework 7 Q: Look at these lists of data items: List List List What value would each of the following standard algorithms return: (a) find minimum (b) find maximum (c) count occurrence of: 5.6 in list. 99 in list in list. (d) linear search for:.8 in list. 99 in list. 0. in list. 8 Q: Which standard algorithm would be used by the national census organisation to: (b) find out how many people called Mary live in the UK (c) find out the oldest person living in the UK (d) discover whether or not there was an individual called Stan D. Ardal-Gorithm in the UK? Q: Name the four standard algorithms Q4: Write the Pseudocode for the Input Validation algorithm 4 5