University Of Pretoria

Transcription

1 University Of Pretoria Faculty Of Engineering, Built Environment And Information Technology Student Number: Name: Surname: Contact Number: Signature: Student Information Test Information Subject: MPR213: Programming and Information Test: Semester Test 1 Technology Date: 13 March 2014 Pages: 10 Internal: Mr. Page and Dr. Wilke Questions: 4 External: Time: 90min Special Instructions Results No calculators allowed - Python is your calculator Question 1: Multiple choice questions should be answered on Side 1 Question 2: Rough work may be done in the booklet provided Question 3: The final answers to each question must be written in the answer Question 4: sheets attached to this question paper Examination Rules and Regulations No candidate may enter the examination hall later than half an hour after the examination session has commenced and no candidate may leave the examination hall earlier than half an hour after the examination session has commenced. Candidates are obliged to execute immediately all instructions given by the invigilator. Candidates may not take into the examination hall or have in their possession any unauthorised apparatus, books, notes or paper of whatever nature or size. Once the invigilator has announced that the examination has commenced, all conversation or any other form of communication between candidates must cease. During the course of the examination there may be no communication of any nature between No candidates may assist or attempt to assist another candidate, or obtain assistance or attempt to obtain assistance from another candidate with regard to any information. Candidates shall not act dishonestly in any respect. Writing on any paper other that that supplied for examination purposes is strictly prohibited. Candidates may also not write on the blotting paper or the examination paper except if, in the case of the latter, they are required to fill in answers or to respond to multiplechoice questions. Rough work should be done in the examination answer book and then crossed out. Pages may not be removed from the answer book. Smoking is not permitted in the examination hall and candidates may not leave the examination hall during the examination in order to smoke outside. Only in exceptional circumstances will a candidate be given permission to leave the examination hall temporarily, and then only under the supervision of an invigilator.

2 Question 1 [9] Use help to get information regarding the functions used below. Each question only has one correct answer. Multiple choice questions should be answered on Side 1 of the provided multiple choice sheet. Gebruik help om inligting oor funksies wat hieronder gebruik word te verkry. Elke vraag het slegs een korrekte antwoord. Meervoudige keuse-vrae moet beantwoord word op Kant 1 van die uitgedeelde meervuldige keuse antwoordstel. Question 1.1 Which one of the following Python statements will compute a random integer 0 or 1? Watter een van die volgende Python stellings sal n willekeurige heelgetal 0 of 1 bereken? import random as rand (A) random() (B) rand.random() (C) randint(0, 1) (D) rand.randint(0, 1) Bladsy 2 van 10 / Page 2 of 10

3 Question 1.2 Which function in the math module will split and return the integer and fractional parts of a float? Watter wiskundige funksie in die math module sal die heelgetal en fraktionele kompenet van n reële getal skei en as uitset gee? (A) frexp(x) (B) modf(x) (C) ldexp(x) (D) trunc(x) Bladsy 3 van 10 / Page 3 of 10

4 Question 1.3 A while loop must stop when counter (an integer object) is less than 0 or greater than 10. Which one of the combined conditions is correct? n while Lus moet stop sodra counter ( n heelgetal objek) kleiner as 0 of groter as 10 is. Watter van die gekombineerde kondisies is korrek? (A) counter >= 10 and counter <= 0 (B) counter <= 10 and counter >= 0 (C) counter >= 10 or counter <= 0 (D) counter <= 10 or counter >= 0 Bladsy 4 van 10 / Page 4 of 10

5 Question 2 [12] Given the two lists, adjacent and opposite that represents the adjacent and opposite side lengths of several right-angled triangles (See Fig. 1). Gegee twee lyste, adjacent en opposite wat die aangrensende en teenoorstaande sylengtes van reghoekige driehoeke verteenwoordig (Sien Fig. 1). adjacent = [1, 3, 5, 7,..., 101] opposite = [2, 4, 6, 8,..., 102] Write a Python script that computes the hypotenuse of each triangle, from the lists, and displays the result with an appropriate message to the screen. Skryf n Python program wat die skuinssy van elke driehoek bereken van die lyste en die resultaat met n gepaste boodskap na die skerm vertoon. hypotenuse (skuinssy) adjacent (aangrensende) opposite (teenoorstaande) Figure 1: Right-angled triangle / Reghoekige driehoek Bladsy 5 van 10 / Page 5 of 10

6 Answer Sheet Name: Question: Code: Student No: Mark: Note: Please fill in the required information at the top of this answer sheet in case it becomes separated from the question paper. Bladsy 6 van 10 / Page 6 of 10

7 Question 3 [14] Consider the sequence of square numbers Beskou die reeks van vierkant getalle 1, 4, 9, 16, 25,..., or in an alternative form of alternatiewlik 1 2, 2 2, 3 2, 4 2, 5 2,... Write a python script that generates a list containing this sequence of square numbers. The list must be as long as possible, such that the sum of the square numbers in the list is still less than Your Python script must then display the number of terms in the list with an appropriate message to the screen. Skryf n Python program wat n lys wat hierdie reeks van vierkant getalle bevat. Die lys moet so lank as moontlik wees met die som van die vierkant getalle in die lys kleiner as Jou Python program moet dan die aantal terme in die lys met n gepaste boodskap na die skerm vertoon. Bladsy 7 van 10 / Page 7 of 10

8 Answer Sheet Name: Question: Code: Student No: Mark: Note: Please fill in the required information at the top of this answer sheet in case it becomes separated from the question paper. Bladsy 8 van 10 / Page 8 of 10

9 Question 4 [15] (0, 1) (1, 1) y (0, 0) (1, 0) x Figure 2: Silicon Wafer / Silikoonskyfie Consider the square silicon wafer, with a unit side length, shown in Fig. 2. The wafer is divided into four triangular regions, numbered 1 through 4. Outlined is a manufacturing process: Ions are randomly deposited onto the square wafer, one at a time, until the region of triangle 1 has a total of 50 ions. Write a python script that simulates the process and then displays the number of ions in each triangular region with an appropriate message to the screen. Beskou die vierkantige silikoonskyfie met eenheids sylengte in Fig. 2. Die skyfie word in vier driehoekige areas genommer 1 tot 4 verdeel. Uiteengesit is n vervaardigingsproses: Ione word een vir een willekeurig op die vierkantige skyfie gedeponeer todat die area van driehoek 1 n totaal van 50 ione bevat. Skryf n Python program wat die proses simuleer en dan die hoeveelheid ione in elke driehoekige area met n gepaste boodskap na die skerm vertoon. Bladsy 9 van 10 / Page 9 of 10

10 Answer Sheet Name: Question: Code: Student No: Mark: Note: Please fill in the required information at the top of this answer sheet in case it becomes separated from the question paper. Bladsy 10 van 10 / Page 10 of 10