PCEP Variable Scope and the `global` keyword 5

Question 1

What is the output?

def f():
    global z
    z = 99
f()
print(z)

Accepted Answer

99

Answer

f() creates global z = 99, so it is accessible at module level after the call.

Question 2

Which of the following statements about variable shadowing is TRUE?

Accepted Answer

A local variable with the same name as a global variable hides the global inside that function

Answer

Shadowing means the local name takes precedence inside the function; the global is unaffected.

Question 3

What is printed?

a = 1
def outer():
    a = 2
    def inner():
        a = 3
        print(a)
    inner()
    print(a)
outer()
print(a)

Accepted Answer

3
2
1

Answer

Each function has its own local a; inner prints 3, outer prints 2, module level prints 1.

Question 4

Which built-in function lets you inspect the global namespace dictionary?

Accepted Answer

globals()

Answer

globals() returns a dictionary of the current module's global namespace.

Question 5

What is the result of the following code?

x = 'outside'
def test():
    global x
    del x
test()
print(x)

Accepted Answer

NameError

Answer

del x with global x deletes the module-level variable, so print(x) raises NameError.

(PCEP) Certified Entry-Level Python Programmer Practice Test