Units and Measures

Question 1

pico

Answer 1

10^-12

Question 2

nano

Answer 2

10^-9

Question 3

micro

Answer 3

10^-6

Question 4

milli

Answer 4

10^-3

Question 5

kilo (K)

Answer 5

10^3 or ~2^10, thousands

Question 6

mega (M)

Answer 6

10^6 or ~2^20. millions

Question 7

giga (G)

Answer 7

10^9 or ~2^30, billions

Question 8

tera (T)

Answer 8

10^12 or ~2^40, trillions

Question 9

peta (P)

Answer 9

10^15 or ~2^50, quadrillions

Question 10

exa (E)

Answer 10

10^18 or ~2^60, quintillions

Question 11

approx time for a mutex lock/unlock

Answer 11

100 ns

Question 12

approx time for main memory reference

Answer 12

100 ns

Question 13

approx time for a context switch

Answer 13

500 ns

Question 14

approx time to read 1MB sequentially from memory

Answer 14

250,000 ns, 250us

Question 15

approx time to send 2KB over a 1 Gbps network

Answer 15

20,000 ns, 20us

Question 16

approx time for round trip within a datacenter

Answer 16

500,000 ns, 500us

Question 17

approx time for disk seek

Answer 17

10,000,000 ns, 10,000 us, 10 ms

Question 18

approx time to read 1MB sequentially from SSD

Answer 18

98,000 ns

Question 19

approx time to read 1MB sequentially from network

Answer 19

10,000,000 ns

Question 20

approx time to read 1MB sequentially from disk

Answer 20

30,000,000 ns

Question 21

approx time for round trip from CA to Netherlands

Answer 21

150,000,000 ns