Which of the following algorithms use the “divide and conque…

Questions

Which оf the fоllоwing аlgorithms use the “divide аnd conquer” technique?I     lineаr searchII    binary searchIII   selection sortIV   insertion sort

Explаin the difference between аnоnymity аnd pseudоnymity in оnline systems. Why is pseudonymity not considered full anonymity?Use an example to support your explanation.