Abstractions

Which of the following best describes abstraction?

• Adding complexity so the concept can apply to more uses

• Simplifying complexity to make the concept more general

• Combining procedures to make a new one

• A set of instructions to do something

What is one way in which number systems are abstract?

• The same amount can be represented by different number representations

• A number can only be represented by one number system

• Symbols can be used to add, subtract, multiply and divide them

• They are constants

What is the number system used by computers?

• Base 10

• Base 8

• Base 2

• Base 16

What is 214 in binary

• 11010100

• 11010110

• 11010111

• 01101011

The letter "M" in the ASCII table is representated by 01001101 in binary. What is this is hexadecimal?

• 4E

• 413

• 4D

• 1101

With Boolean, what does "A AND B" mean?

• Neither A or B can be true for the condition to be true

• If A is true, then the condition is true

• If B is true, then the condition is true

• Both A and B must be true for the condition to be true

Which are more abstract: high-level or low-level programming languages

• High-level

• Low-level

• Both have the same level of abstraction

• Neither are abstract

Which number type is stored imprecisely in memory?

• Integers

• Numbers with decimals

• Both

• Neither

Procedures are abstract:

• by the use of parameters

• by being easier to manage

• by being able to be used multiple times

• all of these

What is a smaller representation of something, such as an event or process that can be used to determine what could happen in the real world?

• A model

• A plan

• An image

• A miniature