Ocr Gcse Computer Science J277 Study Guide Questions And Correct Answers

key logger {Ans: Software or hardware which records all key strokes on a computer system.}flow diagram {Ans: a graphical way of showing an algorithm}two parts of the computer which improve performance {Ans: RAM and SSD}Network Topologies {Ans: represents a network's physical layout, including the arrangement of computers and cables}Lossless Compression {Ans: a data compression algorithm that allows the original data to be perfectly reconstructed from the compressed data.}Trojan {Ans: A program disguised as a harmless application that actually produces harmful results.}SQL Injection {Ans: An attack that targets SQL servers by injecting commands to be manipulated by the database.}disadvantages of the cloud {Ans: -dependency on vendor -loss of control over data location -little visibility into true security and disaster preparedness capabilities}One reason cache size affects CPU performance {Ans: One reason is that data is transferred faster which makes the CPU more efficient}network {Ans: A chain of communication that connects places}IP address {Ans: A number assigned to any item that is connected to the Internet.}Advantages of Cloud Computing {Ans: Reduced software costs, improved security, flexible capacity, lower equipment costs, easier access}array {Ans: An arrangement of objects in equal rows.}RAM