PSP Week3

What are the essential steps in the software engineering process? planet in the Solar System?

• Writing code, debugging, testing
• Understanding the problem, coming up with a solution, writing the program, and testing
• Gathering requirements, coding, and documentation

How can source code be converted into machine code for execution?

• It's directly executed by the machine.
• compilation or interpretation

• Trace table

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

• 123a
• a123b
• a_b

How can you read user input in Python?

• input("Enter your name: ")
• read("Enter your name: ")
• get("Enter your name: ")

How can you display information to the user in Python?

• show("Hello, world!")
• output("Hello, world!")
• print("Hello, world!")

Which programming construct is used to make decisions in Python?

• Iteration
• Selection
• Looping

What does the len function return for a string?

• The number of spaces in the string
• The length of the string
• The number of characters in the string

How can you join two strings together in Python?

• str1 + str2
• str1.join(str2)
• str1.concat(str2)

What is the output of a[1:3] for the string "Hello"?

• "He"
• "ll"
• "el"

How can you reverse a string using slicing in Python?

• string[::1]
• string[::-1]
• string[0:-1]