Quiz 140 / First steps in Python

What are the names given to processes A and B in the diagram?

• A: push
  B: commit

• A: commit
  B: push

• A: push
  B: merge

• A: merge
  B: push

Answer explanation

In the context of version control, 'commit' refers to saving changes to the local repository, while 'push' refers to sending those changes to a remote repository. Therefore, the correct names for processes A and B are A: commit and B: push.

Which code would have the same function as the Python code shown?

• 
• 
• 
• 

Regarding version control with Git and GitHub, which of the following is correct?

• GitHub stores files on the local computer and Git stores them on a server on the Internet.

• Both Git and GitHub store files on a server on the Internet.

• Git stores files on the local computer and GitHub stores them on a server on the Internet.

• Both Git and GitHub store files on a local computer.

Answer explanation

Git is a version control system that stores files locally on your computer, while GitHub is a cloud-based platform that hosts Git repositories on a server, allowing for collaboration and remote access.

Which of the following uses the Python convention for naming contants?

• myprimes =
  [2, 3, 5, 7, 11, 13]

• my_primes =
  [2, 3, 5, 7, 11, 13]

• mYPrimes =
  [2, 3, 5, 7, 11, 13]

• MY_PRIMES =
  [2, 3, 5, 7, 11, 13]

Answer explanation

In Python, constants are typically named using all uppercase letters with underscores separating words. Therefore, 'MY_PRIMES' follows this convention, while the other options do not.

Which code snippet is equivalent to the attached code

• new_score =
  score +10

• score =
  score += 10

• new_score =
  score += 10

• score = score != 10

Answer explanation

The correct choice, 'score = score += 10', updates the variable 'score' by adding 10 to its current value. This is equivalent to incrementing 'score' directly, while the other options do not achieve the same effect.

Which of the following is not a valid variable name in Python?

• 2025age = 15

• ageIn2025 = 15

• age_2025 = 15

• _2025age = 15

Answer explanation

In Python, variable names cannot start with a digit. Therefore, '2025age' is not a valid variable name, while 'ageIn2025', 'age_2025', and '_2025age' are all valid.

Which code will produce the same output as that shown.

• 
• 
• 
• 

Which of the following is not a valid way to concatenate strings?

• "Hello" + " " + "World"

• print("Hello", "World")

• "Hello" * 2

• "Hello" + 5

Answer explanation

The expression "Hello" + 5 is invalid because you cannot concatenate a string with an integer directly in Python. The other options are valid ways to concatenate strings.

What is the name given to the operation shown?

• type casting

• integer casting

• string casting

• float casting

Answer explanation

The operation shown is called type casting, which refers to converting a variable from one data type to another. This is a general term that encompasses all specific types of casting, such as integer, string, or float casting.

What is the output of the code shown?

• TypeError

• 10

• 55

• "10"

Answer explanation

The code likely attempts an operation that combines incompatible types, such as adding a string to a number, resulting in a TypeError. Thus, the correct output is TypeError.