Comp-Sci A Level

what is the subnet mask of 192.168.1.128:24, and a valid IP on that subnet

• 255.255.255.128, 192.168.1.129

• 255.255.255.0, 192.168.1.129

• 192.168.1, 192.168.1.1

• 192.168.1, 192.168.1.129

What is the rough maximum number that a single precision, signed floating point number can represent

• 3.4*10^38

• 2.1*10^9

• 4.2*10^9

• 1.8*10^19

What is the BNF assignment symbol

• :=

• =

• <-

• ::=

What is a repeat until loop most precisely defined as

• A loop

• Iteration

• Indefinite top test loop

• Bottom test loop

What is the difference between UTF-8 and Unicode

• Nothing

• UTF-8 has 8 bits, whereas Unicode only has 7

• They are the same length, but have different characters

• Unicode has emojis, but utf-8 has unused bit-patterns