1) The ALU is .... a) A collection of wires used to transfer data and instruction from one component to another b) Smaller and faster than cache memory c) Regulates the speed and timing of all signals and computer functions d) Carries out mathematical and logical operations 2) What does the control unit do? a) Regulates the speed and timing of all signals and computer functions b) Carries out mathematical and logical operations c) Co- ordinates all of the CPU actions and decodes instructions d) Carries data between components 3) Which of the following only works in one direction? a) Address Bus b) Data Bus c) Control Bus d) Universal Serial Bus 4) Which of the following happens second in the fetch-decode-execute cycle? a) The instruction is carried out b) The control unit decodes the instruction c) The next instruction is sent from the RAM to the CPU d) The CPU sends a signal to the RAM requesting the next instruction 5) Which type of secondary storage has no moving parts? a) SSD b) Optical storage c) Magnetic storage d) ROM 6) Primary storage is needed to provide the CPU with fast, direct access to the program instructions and data that it is currently using. a) True b) False 7) In an embedded system what is the role of the actuator? a) It supplies information from the outside world b) It converts the output commands into mechanical action c) It  completes any logical or mathematical calculations d) It stores instructions for the system to use 8) Which of the following is not a components of an embedded system? a) Timer b) Sensor c) Transmitter d) ROM 9) In an operating system user management oversees the execution of programs a) True b) False 10) A round robin is a commonly used scheduling algorithm a) True b) False 11) Which of the following best explains why an embedded system cannot be modified once manufactured a) The system uses secondary storage b) The code is written in low level language c) The programs are stored in the ROM d) The casing is sealed 12) Which of the following provides access control? a) File managment b) Peripherals management c) Process management d) User management 13) If a user has delete permissions this means...... a) the user can modify the files b) the user is only able to refer to the files c) the user has full access rights d) the user has the right to run the files 14) What is the purpose of defragmentation? a) To reduce the size of the file so that it is quicker to access b) To speed up access to files stored on a magnetic hard disk c) To protect computer systems and data from damage caused by viruses d) To recover data from and repair files that have become corrupted by a computer malfunction or cyberattack 15) How does an audit trail help make software robust? a) By keeping track of who made what changes and when b) By carrying out regular code reviews c) By identifying weakness in the code that could be exploited d) By checking that the code adheres to set standards 16) Which of the following is not an example of a translator? a) C++ b) Compiler c) Interpreter d) Assembler 17) The code is not platform-specific is a feature of ....... a) A compiler b) An interpreter c) An assembler 18) You cannot change the program without going back to the original source code is a feature of ..... a) An interpreter b) An assmebler c) A compiler 19) High Level languages are ...... a) Are machine-independent b) Are generally less memory efficient c) Are difficult and time consuming to use d) Interact directly with the hardware enabling efficient memory use 20) Which of the following is an example of a low level programming language? a) Python b) Java c) Machine code d) C++

Edexcel Computer Science Topic 3

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