Andrew Belegrinos

Andrew Belegrinos

Member since
@andrew-

N7 Co-founder. IB-DP-CS Teacher at Preshil

Multiple Choice1 MarkCommunity
Consider the following pseudocode:
VALUES = [ ] loop I from 0 to 3 VALUES[I] = ARRAY[I][0] loop J from 1 to 2 if ARR[I][J] < VALUES[I] then VALUES[I] = ARR[I][J] end if end loop end loop output VALUES
Choose the output yielded when the above algorithm is correctly applied to the 2D array given below:
Question Image
(a).
[4, 11, 18, 7]
(b).
[-1, -10, -7, 1]
(c).
[ -10, -7, -1]
(d).
[18, 5, 11]
13641
Andrew Belegrinos
Short Answer2 MarksCommunity
Consider the following array of Cartesian co-ordinates called POINTS.
POINTS = [(3,7),(5,11),(1,2),(4,9)]
Consider the following pseudocode which draws a path connecting each point contained in the array POINTS.
[2]
drawLine((3,7),(5,11)) drawLine((5,11),(1,2)) drawLine((1,2),(4,9))
Rewrite the pseudocode above to achieve the same functionality both iteratively and more generally, such that POINTS may contain any four coordinates, each of the form (a, b).
21483
Andrew Belegrinos
Short Answer2 MarksCommunity
Define the term heuristics.
[2]
27382
Andrew Belegrinos
Extended Response11 MarksCommunity
(a).
Given a short array of integers of length 2 called myShortArray, write pseudocode to determine and output the biggest and second biggest number.
[3]
(b).
Given an array of integers of length 5 called myLongerArray, write pseudocode to determine and output the biggest number it contains.
[3]
(c).
Given an array of integers of length 7 called myArray, write pseudocode to output the sum of the two biggest integers it contains. The algorithm should handle both negatives values and repeated values.
[5]
49892
Andrew Belegrinos
Short Answer3 MarksCommunity
Write an algorithm which outputs every item of a 2D array that is 100 by 100 elements in size
[3]
47581
Andrew Belegrinos
Short Answer4 MarksCommunity
Input the dimensions of a rectangle then print both area and perimeter.
[4]
20450
Andrew Belegrinos
Short Answer3 MarksCommunity
Input 3 numbers and if all three numbers are different then output "distinct", otherwise output "not distinct".
[3]
26350
Andrew Belegrinos
Short Answer4 MarksCommunity
Input 7 numbers and use a loop to output their total.
[4]
33562
Andrew Belegrinos
Multiple Choice1 MarkShared
A programmed microcontroller in a X iterates. Bob really like his name. He would love a way to be able to see is name over and over again. Bob likes his name so much, he decided that he wants to print it out his name 1000 times on a computer screen! Which of the three concepts we have learned in Python so far (sequence, selection, iteration) should Bob use? Explain why!
(a).
Sequence
(b).
Selection
(c).
Iteration
(d).
No Text Provided...
0321
Andrew Belegrinos
Multiple Choice1 MarkCommunity
Which of the following correctly describes a foreign key?
(a).
An attribute that forms part of a composite primary key to uniquely identify a record in a table.
(b).
An attribute that uniquely identifies a record in a relational database table.
(c).
An attribute that is copied to an index data structure in order to optimise query efficiency for those rows / records associated with the copied attribute.
(d).
An attribute that corresponds to the value of a primary key in another table for the purpose of creating a link between the two tables.
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Andrew Belegrinos
Short Answer2 MarksCommunity
Define the term population.
[2]
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Andrew Belegrinos
Short Answer4 MarksCommunity
Outline one advantage and one disadvantage of Tournament Selection when compared to Truncation Selection.
[4]
2221
Andrew Belegrinos
Short Answer1 MarkCommunity
Given a simple traffic light with a pedestrian crossing button forms an open loop system, outline one way in which traffic light operations may return to normal following a pedestrian crossing event.
[1]
12351
Andrew Belegrinos
Short Answer3 MarksCommunity
In an effort to better understand city traffic flows, traffic lights were upgraded to include CCTV cameras.
Discuss the social implications of monitoring traffic using CCTV.
[3]
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Andrew Belegrinos
Short Answer7 MarksCommunity
The Medicare Levy Surcharge (MLS) is a 1-2% levy paid by Australian taxpayers who do not have private hospital cover and who earn above a certain income. The current income threshold is AUD$90,000 for singles and AUD$180,000 for couples / families (2020-2021 financial year). Once Australians earn above these thresholds within a financial year, they must pay the MLS. Given an annual income called INCOME, a boolean flag for having private hospital cover or not called PRIVATE and another boolean flag for being single or not called SINGLE, write pseudocode to output True if eligible for the MLS or False otherwise. For example, a single (SINGLE = true) person who doesn’t have private health insurance (PRIVATE = false) and is earning AUD$120,000 (INCOME = 120000) annually must pay the MLS (output True)
[7]
15550
Andrew Belegrinos
Short Answer7 MarksCommunity
Discuss, with respect to two different types of sensors, how a medical control system used to monitor hospital patient vital signs and maintain a constant ambient room temperature might function. Any concerning measurements automatically alert medical staff.
[7]
17340
Andrew Belegrinos
Short Answer10 MarksCommunity
Pablo is concerned about whether or not the MONS architecture is sufficiently scalable and can remain efficient as the number of users increases. Evaluate Pablo’s concern around the ability for the MONS network to handle a rapidly increasing number of users.
[10]
6211
Andrew Belegrinos
Multiple Choice1 MarkCommunity
Given the following pseudocode snippet and possible inputs for X and Y, what are the correct boolean values for the corresponding outputs M and N in the table below? if X AND NOT Y then output TRUE else output FALSE end if +-------+-------+----------+ | X | Y | OUTPUT | +-------+-------+----------+ | FALSE | FALSE | M | | FALSE | TRUE | N | | TRUE | FALSE | TRUE | | TRUE | TRUE | FALSE | +-------+-------+----------+
(a).
M = FALSE and N = FALSE
(b).
M = FALSE and N = TRUE
(c).
M = TRUE and N = FALSE
(d).
M = TRUE and N = TRUE
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Andrew Belegrinos
Extended Response9 MarksShared
An online book store is comprised of several elements, including typical header, sidebar and footer components.
(a).
Publishers wish to place a banner on the site to advertise their best seller. Given many shoppers access the website on their mobile phone, suggest a sensible location on the website in order to maximise sales - justify your recommendation.
[2]
(b).
Identify two pieces of information that, by convention, would appear in the footer of the website
[2]
A search form in the website sidebar is used to help customers find specific books. The web form is coded as follows: <head> <script> function validateForm() { var x = document.forms["myForm"]["title"].value; if (x == "") { alert("Title must be filled out"); return false; } } </script> </head> <body> <h2>Book Search Form</h2> <form name="myForm" action="/searchBooks.php" onsubmit="return validateForm()" method="post"> <select name="format"> <option>Paperback</option> <option>Hardback</option> </select> Title: <input name="title" type="text" /><br /> Author: <input name="author" type="text" /><br /> Publisher: <input name="publisher" type="text" /><br /> <input type="submit" value="Search"/> </form> </body>
(c).
Identify the two client side languages used in the above example
[2]
(d).
Describe the sequence of actions carried out to complete a successful search
[3]
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Andrew Belegrinos
Short Answer1 MarkCommunity
Define the term Syntax
[1]
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Andrew Belegrinos