Practice Set Of Valid Programs In A Programming Language (5.2.1) - Countability of the set of all strings over a finite alphabet
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Set of Valid Programs in a Programming Language

Practice - Set of Valid Programs in a Programming Language

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Practice Questions

Test your understanding with targeted questions

Question 1 Easy

What does it mean for a set to be countable?

💡 Hint: Think about how you could list natural numbers.

Question 2 Easy

Define a valid program in programming languages.

💡 Hint: Consider the beginning and end instructions of a program.

4 more questions available

Interactive Quizzes

Quick quizzes to reinforce your learning

Question 1

A set is countable if:

It has a finite number of elements
It can be listed using natural numbers
It has no elements

💡 Hint: Recall our definition of countability.

Question 2

True or False: All strings over a finite alphabet form a countable set.

True
False

💡 Hint: Think about how we listed the strings.

2 more questions available

Challenge Problems

Push your limits with advanced challenges

Challenge 1 Hard

Design a valid program using a made-up programming language that includes at least three distinct commands.

💡 Hint: Focus on ensuring your program has a start and a syntax that makes sense.

Challenge 2 Hard

Prove that there are infinitely many programs even within a constrained limited programming language.

💡 Hint: Consider how you can add new steps between the start and end.

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