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CS1 Python Subgoals

Section 9.2 Evaluate Functions-WE1-P1

Subgoals for evaluating a function call:.

  1. Create stack frame for global variables
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  2. Ensure function is defined before function call before beginning body of function
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  3. Determine parameter values based on positional arguments, keyword arguments, and default values to initialize local variables
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  4. Use stack frame for function to trace local variables
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  5. At return to call site, pass values back to call site
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  6. Delete stack frame with local variables after return to call site
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Exercises Exercises

1.

Q1: What is the output of the following code?
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def foo(a, b):
    if a > b:
        return "a is larger!"
    elif b > a:
        return "b is larger!"
    else:
        return "a and b are equal!"
a = 10
b = 15
result = foo(b, a)
print(result)
  • "a is larger!"
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  • "b is larger!"
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  • "a and b are equal!"
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  • Compiler error
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2.

Q2: What is the output of the following code?
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num = 10
a = double(5)
def double(num):
    return num * 2
print(a)
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3.

Q3: What is the output of the following code?
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a = 10
def my_func(a, b, c):
    c = c + 1
    d = a * b + c
    return d
c = 5
result = my_func(5, 2, 7)
print(result)
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4.

Q4: What is the output of the following code?
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def multiply(a, b):
    return a * b
b = 3
def divide(a):
    return a // b
first = 10
second = 5
multiply_result = multiply(first, second)
divide_result = divide(multiply_result)
print(divide_result)
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5.

Q5: What is the output of the following code?
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def bar(alpha):
    return alpha * gamma
alpha = 5
beta = 2
gamma = 10
result = bar(beta)
gamma = 1
print(result)
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