Ocr Gcse Computer Science Study Guide Questions And Correct Answers

What does the boot sequence contain? {Ans: It contains the BOOT LOADER which is a program that starts the sequence when the computer is switched on.}What are Solid-State Drives (SSD)? {Ans: It is technology based on electronics with NO MOVING parts, mechanical parts. SSDs can contain MORE DATA and will eventually replace hard disks as they are QUICK and have HIGH CAPACITY.}What is the CPU? {Ans: The CENTRAL PROCCESSNG UNIT It is the hardware within a computer whose purpose is to PROCESS DATA.}What is a bus? {Ans: It is a part of the computer that TRANSFERS DATA and signals between the components of the computer.}What is Flash Memory? {Ans: - TYPE OF ROM that can be overwritten. - Type of NON-VOLATILE MEMORY using SOLID- STATE technology.}What are the two main components of the CPU? {Ans: - The arithmetic and logic unit (ALU) - The control unit}What are the disadvantages of an expert system? {Ans: - Only covers a narrow range of knowledge - Time consuming and Expensive to make a good expert system - Not as good as having human experts - Does not learn from mistakes unless there is user feedback and