Logic & Programming GFACT Practice Questions (Page 3)

Questions 11–15

1. 11foundation · easy

   What is the primary purpose of a function in a programming language?

   • ATo store a value in memory for later retrieval
   • BTo repeat a block of code a fixed number of times
   • CTo group a set of statements into a reusable unit that can be called by name
   • DTo conditionally execute one of two blocks of code
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2. 12expert · medium

   A program has the following code: x = 5; def foo(): global x; x = 10; foo(); print(x). What is the output?

   • A10
   • BError
   • C5
   • DNone
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4. 13application · easy

   A programmer is tracing a recursive function that computes the factorial of a number. The function is: `def factorial(n): if n <= 1: return 1; else: return n * factorial(n-1)`. What is the result of `factorial(4)`?

   • A24
   • B16
   • C10
   • D12
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5. 14expert · medium

   A programmer is tracing a program that uses a global variable and a function that modifies it. The code is: `x = 10; def increment(): x = x + 1; increment(); print(x)`. The program prints 10 instead of 11. What is the most likely cause?

   • AThe `+` operator is not defined for integers.
   • BThe function is not called before the print statement.
   • CThe global variable is immutable, so it cannot be changed.
   • DThe function creates a local variable `x` instead of modifying the global `x`.
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6. 15application · medium

   A developer is writing a Python script to process user input. The script reads a number from the command line and then performs arithmetic. The code is: `num = input("Enter a number: ")` followed by `result = num * 2`. When the user enters `5`, the script outputs `55` instead of `10`. What is the most likely cause?

   • AThe `input()` function returns a string, and the `*` operator repeats the string.
   • BThe script has a syntax error because `input()` requires a prompt argument.
   • CThe variable `num` is a float, and multiplication by 2 truncates the decimal.
   • DThe `*` operator is not defined for integers in Python.
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