computer science eot exam

Question 1

Integer (int)

Answer 1

Used for whole numbers (no decimals)

Question 2

Float (floating-point number)

Answer 2

Used for decimal numbers

Question 3

String (str)

Answer 3

Used for text

Question 4

Boolean (bool)

Answer 4

Used for true/false values

Question 5

explain why binary data is grouped into sets of four bits when converting to hexadecimal

Answer 5

Binary is grouped into sets of 4 bits when converting to hexadecimal because of how the number systems match.

Question 6

explain why computers use binary number system instead of denary

Answer 6

Computers use binary (base 2) instead of denary (base 10) because it matches how their hardware works.

Question 7

four uses of hexadecimal in computer systems

Answer 7

HTML colour coding
Memory addresses
Enter codes/ debugging
machine code/ assembly language

Question 8

Not gate

Answer 8

if input 0 Output is 1
if input is 1 output 0

Question 9

And gate

Answer 9

the output can only be 1 if both inputs are 1

Question 10

Or gate

Answer 10

the output is only 0 when both inputs are 0

Question 11

nor gate

Answer 11

the output can only be 1 when both inputs are zero

Question 12

Nand

Answer 12

the output can only be 0 when both inputs are 1