What is a local variable?

A temporary variable that is only used inside a function.

What happens if you call the function "range()" with only one input argument? It will generate:

A list from 0 up to, but not including, the argument passed.

In the following, what happens if you put the line sum = 0 as the first line of the loop body?

The square function will return n instead of n * n

Tracking down errors in a program and correcting them.

What does the following code print?

FALSE and TRUE on two separate lines

Consider the following loop: what does each iteration through the loop do?

Draw one side of a square using Alex's current colour.

In the following Python command generating a list, what does the second argument (10) specify?

That the list should stop at 9 (including 9).

What is an algorithm?

A sequence of steps that solve the problem in a finite time.

How does python know which lines are part of a loop body?

They are indented to the same degree from the loop header.

One reason that lotteries don’t use computers to draw random numbers is:

Because computers can only generate pseudo-random numbers.

Which of the following is a semantic error?

Forgetting to divide by 100 when printing a percentage value

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Revising Foundations of Programming

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Testing knowledge of the basic Python constructs and programming concepts

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Questions 30

Answers

1
What value is printed when the following statement executes?..
Nothing is printed. It generates a runtime error.
54
53.785
53
2
What is a local variable?
The same as a parameter.
A variable used by programmers who live in the same area.
A temporary variable that is only used inside a function.
Just another name for any variable.
3
What is printed by the following statements?
The string "rocksrocksrocks"
The string " rock rock rock"
The string "rockrockrock"
An error, you cannot use repetition with slicing.
4
What happens if you call the function "range()" with only one input argument? It will generate:
A list from 1 up, to but not including, the argument passed.
A list from 1 up to, and including, the argument passed.
A list from 0 up to, but not including, the argument passed.
An error: "range( )" always takes at least 2 arguments.
5
What value is printed when the following statement executes?
4.25
4
2
5
6
What value is printed when the following statement executes?
5
4
4.25
2
7
In the following, what happens if you put the line sum = 0 as the first line of the loop body?
The square function will return n instead of n * n
The square function will work as expected and return n * n
The square function will return 0 instead of n * n
The square function will cause an error
8
What is the correct boolean expression for testing if the value stored in x is between 0 and 5?
x > 0 and x < 5
x > 0 or x < 5
x > 0 and < 5
0 < x < 5
9
What is debugging?
Removing all the run-time errors from a program.
Tracking down errors in a program and correcting them.
Finding all the syntax errors in a program.
Removing all the bugs from the laboratory or classroom.
10
What does the following code print?
TRUE
TRUE, FALSE and TRUE on 3 separate lines
TRUE and FALSE on two separate lines
FALSE and TRUE on two separate lines
11
Consider the following loop: what does each iteration through the loop do?
Draw a square using the same colour for each side.
Draw a square using a different colour for each side.
None of these answers is correct.
Draw one side of a square using Alex's current colour.
12
What is the most important skill for a computer scientist?
To be really good at math.
To be able to solve problems.
To be able to write code really well.
To think like a computer.
13
True or False: You can rewrite any for-loop as a while-loop.
None of these answers is correct.
This is nonsense: there is no such a thing as a while-loop.
False
True
14
In the following code, what is the value of "number" the second time Python executes the loop?
5
1
4
2
15
In the following Python command generating a list, what does the second argument (10) specify?
That the list should stop at 9 (including 9).
That the list should start at 10 (including 10).
The list should start at 3 and stop at 10 (including 10).
The list should use every 10th number between start and end
16
What is printed by the following statements:
Ball
Nobody knows.
Error
Call
17
Which of the following is the correct way to reference the value "pi" within the math module?
math->pi
math(pi)
math.pi
pi.math
18
Is the following statement legal in Python (assuming x, y and z are defined to be numbers)?
No
Yes
No one knows.
The question is ill-posed
19
What is the value of the following expression:
24
15
14
13.667
20
What is an algorithm?
A solution to a problem that can be solved by a computer.
A sequence of steps that solve the problem in a finite time.
A series of instructions written in a programming language.
A special kind of notation used by computer scientists.
21
How does python know which lines are part of a loop body?
The loop body ends with a colon (:) which is not shown here.
They are indented to the same degree from the loop header.
There is always exactly one line in the loop body.
The loop body is included within square brackets '[', ']'
22
Which of the following is NOT a Boolean expression?
True
3 == 4
3 + 4
3 + 4 == 7
23
After the following statements, what are the values of x and y?
x is 22 and y is 22
x is 15 and y is 15
x is 15 and y is 22
x is 22 and y is 15
24
Which of the statements is a correct call to the function drawSquare? (assume alex is a turtle)
drawSquare(10)
def drawSquare(t, sz):
drawSquare(alex, 10):
drawSquare(alex, 10)
25
What will the following function return?
None of these answers is correct.
No value.
The value of x + y + z.
The string "x + y + z".
26
Which module would you most likely use if you were writing a function to simulate rolling dice?
The game module.
The math module.
The turtle module.
The random module.
27
Which type of loop can be used to perform the iteration described by the following algorithm:
only a for-loop
only a while-loop
a for-loop or a while-loop
None of these answers is correct.
28
One reason that lotteries don’t use computers to draw random numbers is:
They would generate the same numbers over and over again.
There is no computer on the stage for the drawing.
Computers can't tell which values were already drawn.
Because computers can only generate pseudo-random numbers.
29
Which of the following is a semantic error?
Attempting to divide by 0.
Forgetting a bracket at the end of a line of code.
None of these.
Forgetting to divide by 100 when printing a percentage value
30
The following is a legal variable name in Python: True or False?
It depends on whether variable A is defined or not.
It depends on the maximum length of a string allowed.
True
False

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