CS50 - Week 0

Question 1

What Computer science is all about?

Answer 1

Solving problems (not only programming)

Question 2

In binary representation, how many numbers one hand can reproduce?

Answer 2

32 (2^5)

Question 3

How many state does a binary have?

Answer 3

two (0 and 1)

Question 4

ASCII

Answer 4

American Standard Code for Information Exchange

Question 5

How many bits a byte has?

Answer 5

8

Question 6

What’s abstraction?

Answer 6

Reduce complexity. Make things simpler.

Question 7

How many bits does ASCII have?

Answer 7

256 (2^8)

Question 8

How many bytes does Unicode have?

Answer 8

Up to 4 bytes.

Question 9

RGB

Answer 9

Red Green Blue

Question 10

How many bytes a RGB has?

Answer 10

3 bytes

Question 11

How movies are built?

Answer 11

It’s based on images moving fast (FPS)

Question 12

FPS?

Answer 12

Frames per Second

Question 13

What’s an algorithm?

Answer 13

The term algorithm is used in computer science to describe a problem-solving method suitable for implementation as a computer program. Algorithms are the stuff of computer science: They are central objects of study in many, if not most, areas of the field.

Question 14

log n?

Answer 14

logarithmic

Question 15

Pseudocode?

Answer 15

instruction written in a very human format

Question 16

What’s a function

Answer 16

A verb with returning value

Question 17

What’s a condition

Answer 17

Represent a decision point

Question 18

CPU?

Answer 18

Central processing unit

Question 19

DRY?

Answer 19

Don’t repeat yourself