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Csc1015f 2018 test1 memo SE
Computer science1015 (CSC1015F)
University of Cape Town
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University of Cape Town ~~ Department of Computer Science
Computer Science 1015F ~~ 2018
Class Test 1
** Solutions **
Marks : 32 Time : 45 minutes Instructions: a) Answer all questions. b) Write your answers in PEN by shading in the appropriate block on the answer sheet. c) Each question is worth 2 marks. d) All questions refer to version 3 of the Python programming language.
An algorithm is: a. always written in a programming language like Python. b. the best method for calculating a value. c. the only correct answer to a puzzle or problem. d. a set of instructions to be followed to solve a problem. e. a mathematical formula used in programming. d
What is an example of an identifier? a. two b. 2 c. [ ] d. “two”
e. : a
Examine the Q1 module listed on the last sheet of the test and answer the following four
questions.
3. From the Q1 module , give an example of a variable?
a. “Enter a whole number: ”
b. sep
c. print
d. y
e. else
d
4. From the Q1 module , give an example of a numerical operator.
a. eval
b. %
c. y == 0
d. x
e. if
21<=20 or not -11<=-10 and 31>1 or True and not False a. False b. 0 c. True d. 1 e. (Error: invalid expression)
c 9. The following program has a logic error. How will you fix it so it prints out the correct assessment of the temperature? if age <= 0: print ("Error") elif age > 20: print ("Blue") if age > 10: print ("Red") else: print ("White") a. change "age < 30" to "age > 30" b. change the "else" to "elif age<10:" c. change the second "if" to "elif" d. change the "elif" to "if" e. use parentheses to ensure correct precedence in expressions c
- Suppose that a, b and c are set to specific values before this program is executed. Which combinations of values for a, b and c will result in the output value for d that is specified? if a>b: if b>c: d=b else: d=c else: if c>a: d=c else: d=a
a. a = 13, b = 12, c = 17 | d = 12
b. a = 17, b = 13, c = 12 | d = 17 c. a = 18, b = 19, c = 21 | d = 19 d. a = 9, b = 10, c = 11 | d = 11 e. a = 11, b = 12, c = 17 | d = 11
d
- What values for user and password would give the specified output? real_password = "password" real_name = "brian" if password==real_password: if name!=real_name: print ("one", end="!\n") else: print ("two", end="!\n") else: print ("three", end="!\n")
a. Input: user='brian' password='password' | Output: one! b. Input: user='admin' password='password123' | Output: two! c. Input: user='brian' password='password123' | Output: one! d. Input: user='admin' password='password' | Output: two! e. Input: user='brian' password='password123' | Output: three! e
- What values are generated by this range function? Range (-9, -1, 2)
a. -9, -7, -5, -3, - b. -9, -7, -5, - c. -3, -5, -7, - d. -1, -3, -5, - e. -1, -3, -5, -7, - b
- What does the following program compute? i= j=eval(input(“Enter the first number: ”)) k=eval(input(“Enter the second number: ”)) for x in range(j,k): if x % 2 != 0:
****
*****
e. *****
** *
d
Examine the Q2 module listed on the last sheet of the test and answer the following three
questions.
15. What is the exact output of the Q2a module?
a. ^^^
b.
c. ^^^ ###
d. ^^^###$$$$$$
e. ^^^ $$$ ###
$$$
c
- If the 5th line were changed to
if i > 0:
how would the output of the Q2a module change?
a. It would not change the output. b. It will result in an error. c. Would print ^^^ and ### when i is 1, 2 and 3 d. Would print
Code examples for the test – you may detach this sheet.
_______________________ Question 1 ________________________________
#Q1
x = eval(input("Enter a whole number:"))
y = x % 2
if y == 0:
print(y,”not wonky”,sep=”...”)
else:
print(y,“kinda strange parents”,sep=”!!!”)
_____________________ Question 2 ______________________________________
#Q2
for i in range(4):
for j in range(3):
if i >= 2:
print(“$”,end=””)
elif i > 0:
Csc1015f 2018 test1 memo SE
Course: Computer science1015 (CSC1015F)
University: University of Cape Town
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