Introduction to Python(Week 5)

What is computer science fundamentally?

• The process of taking some input and generating some output

• Using computing technologies to solve problems

• Writing code

• The representation of numbers and text in binary

What kind of language does a computer understand?

• Unary

• Decimal

• Binary

• Hexadecimal

How is 2 represented in binary?

• 000

• 001

• 010

• 011

What are binary digits called?

• Bytes

• Bits

• Transistors

• Switches

How are letters represented in binary?

• By using a standard mapping of numbers to letters

• By using a system called unary

• By using a system called hexadecimal

• By using a system called octal

What is ASCII?

• A graphical programming language

• A system for representing numbers in binary

• A standard mapping of numbers to letters

• A system for representing strings in python

What are algorithms?

• Step-by-step instructions for solving problems

• The process of representing numbers and text in binary

• The study of computers and computing technologies

• The use of electricity to represent binary digits

Which algorithm would be the most efficient algorithm for finding a name in a phone book?

• Flipping through the book two pages at a time

• Starting from the first page and looking for a name one page at a time

• Opening the phone book to the middle and dividing the problem in half each time

• Opening the phone book to a random page and searching from there

What is pseudocode?

• A representation of an algorithm in English

• A graphical programming language

• A system for representing codes in python

• A standard mapping of numbers to letters

What is Scratch?

• A high level programming language

• A graphical programming language

• A low level programming language

• Binary language