Lecture 3

Question 1

Which part of the computer does all the calculations, and where is it located?

Answer 1

• ALU
• In the CPU

Question 2

What are the two main parts of an ALU?

Answer 2

• Integer unit
• Floating point unit

Question 3

Define “carry overflow”

Answer 3

When the result of a calculation contains too many digits for the hardware.

1001+111010111

Question 4

How can you tell if overflow has occurred in Two’s Complement?

Answer 4

If two numbers with the same sign are added, then overflow occurs **iff **the result has the opposite sign.