SDD "Last Minute" Questions (1 Viewer)

[sunny]

The SDD HSC exam is near. This thread is to help anyone that have last minute questions right up to the start of the exam.

1) Do NOT post comments in this thread.

2) Questions and replies to questions only.

3) Do NOT repeat your question if not answered.

None of us are SDD Fairies (except maybe SamD) - I myself (and I'm sure many helpers) will be monitoring this thread closely right up to the start of the exam - if your question does not get answered do not despair.

To make sure you question gets answered quickly, ask brief, concise and to the point questions - long response questions is unlikely to get you a good answer.

Good luck all!

 

[Terra_Niux]

1 BEGIN Autoteller Management System
2 System_on = TRUE
3 Validated = FALSE
4 WHILE Switched_on
5 Customer Number = 0
6 StoredPassword = “ ”
7 Validated = FALSE
8 CardInSlot = FALSE
9 WHILE NOT CardInSlot
10 READ cardslot
11 IF Card is located in cardslot THEN
12 CardInSlot = TRUE
13 ENDIF
14 ENDWHILE
15 AcceptCardDetails (CustomerNumber, StoredPassword)
16 AcceptAndValidatePassword (StoredPassword, Validated)
17 IF Validated = TRUE THEN
18 AcceptMenuChoice(Validated, CustomerNumber)
19 ENDIF
20 READ System_on
21 Validated =TRUE
22 ENDWHILE
23 END

The above pseudocode represents the mainline of the Bank Autoteller
Management System. The system has a logic error.

(ii) Locate the error and describe its effect on the system. Using pseudocode
similar to that of the original, alter the algorithm to remove the error.

(iii) Using pseudocode similar to the mainline, develop an algorithm to
perform the task of the AcceptAndValidatePassword module. If the
password is incorrect, the user is allowed two further attempts to enter a
correct password.

ugghh.. help please

 

[MedNez]

http://www.boredofstudies.org/community/showthread.php?t=43748

There are comments there as to the errors, and what the markers said.

 

[smallcattle]

how to draw a structured diagram???

i cant find any examples in the text book that shows you how to draw it

 

[xeriphic]

what is the difference between these two debugging techniques

program trace and single line stepping thanks for the help

 

[ZzJasonzZ]

how to draw a structured diagram???

i cant find any examples in the text book that shows you how to draw it

If you go to the boardofstudies site and do the paractice hsc multiple choice questions i remember seeing a few there

Edit: 2002 Question 14 and 15

 

[ZzJasonzZ]

what is the difference between these two debugging techniques

program trace and single line stepping thanks for the help

- Program trace – as the program runs, it prints out details of what has just been executed. This can include statement numbers or routine names as appropriate.
- Single line stepping – the source code executes one line at a time, and waits for the programmer to indicate when to execute the next line.

 

[menty]

describe how a flip flop stores data. Include a decription of the latch component

 

[Wild Dan Hibiki]

Distinguish between black and white box testing. I always forget which does what.

 

[sparkl3z]

ok guys quick question, what is the difference between a function and a procedure? can somebody plz describe? tnx

 

[ZzJasonzZ]

Distinguish between black and white box testing. I always forget which does what.

imagine black box as the code in a black box where you can't see it.. so you just try all different values to find errors where as white box you can see through the box into the code and therefor the test values test all pathways and boundaries .. (lame i know but it helps

 

[sunny]

Distinguish between black and white box testing. I always forget which does what.

White box - the algorithm itself is checked for errors. ie, you follow the path the data takes in the algorithm

Black box - the insides of the algorithm/module are unknown. You only check the outputs to see if they are correct for that input.

ok guys quick question, what is the difference between a function and a procedure? can somebody plz describe? tnx

This may be language dependent. Functions return a value. Procedures perform a task, but may not return a value.

describe how a flip flop stores data. Include a decription of the latch component

What type of FF? What type of latch?

 

[neuro_logik]

Distinguish between black and white box testing. I always forget which does what.

Black Box feeding the code inputs and observing the outputs without knowing the exact operations which are leading to the output.

White Box Looking at the internal operations of the code and how it conducts operations

 

[Wild Dan Hibiki]

Simple Q: What's a flip flop?

 

[ZzJasonzZ]

Simple Q: What's a flip flop?

A flip flop is a speciality circuit which allows us to shift bits in a register. Its primary purpose is to store a bit in memory. There are three requirements for this circuit:
1. Must be a bistable device – Stable in 2 states (1 or 0)
2. It should stay in the state to which it has been set until it is physically reset
3. It should have a non-destructive readout.

 

[sunny]

Simple Q: What's a flip flop?

It is a hardware device usually consisting of 4 NAND or NOR gates that can be used as a memory cell that stores one bit. It can be "set" to hold data and "reset" to not hold any data.

This is part of Software Developer's View of Hardware option topic.

 

[menty]

RS NOR flip flop sunny.. and

Q: calculate (30-6) / 5 using the binary system in 6bit 2s comp (the answers say its 000100 as fractions cannot b represented, y cant it be 100 R 100)

 

[Freedom_Dragon]

how to draw a structured diagram???

The white circle with an arrow indicates the movement of parameter between task/modules.

The black circle with an arrow indicates a flag (eg: Valid pay)

The right angle indicates a decision/option

The curved arrow indicates repetition.

Use these and u can draw any strucutred diagram

ok guys quick question, what is the difference between a function and a procedure? can somebody plz describe? tnx

Function returns 1 value/variable
Procedures returns 1 or more values/variables

 

[PoP 'n' Fresh]

procedures return nothing.
they may change global variables, thats it.

 

[Seraph]

17 9 12 18 2 6 14

take a look at these nubmers , after 2 passess of an ascending insertion sort apaprently the array appears


2 9 12 14 6 17 18


why is this so? i know how these work , im just nto seeing it here?

DISREGARD THIS POST AS I WAS LOOKING AT THE WRONG ANSWER