CTSS 2019 P1

[Turn over Name: _____________________ Register Number: ______ Class: _______ Clementi Town Secondary School Preliminary Examination 2019 Secondary 4 Express Computing 7155/01 26 August 2019 2 hours Candidates answer on the Question Paper. CLEMENTI TOWN SECONDARY SCHOOL CLEMENTI TOWN SECONDARY SCHOOL CLEMENTI TOWN SECONDARY SCHOOL CLEMENTI TOWN SECONDARY SCHOOL CLEMENTI TOWN SECONDARY SCHOOL CLEMENTI TOWN SECONDARY SCHOOL CLEMENTI TOWN SECONDARY SCHOOL CLEMENTI TOWN SECONDARY SCHOOL CLEMENTI TOWN SECONDARY SCHOOL CLEMENTI TOWN SECONDARY SCHOOL CLEMENTI TOWN SECONDARY SCHOOL CLEMENTI TOWN SECONDARY SCHOOL CLEMENTI TOWN SECONDARY SCHOOL CLEMENTI TOWN SECONDARY SCHOOL CLEMENTI TOWN SECONDARY SCHOOL CLEMENTI TOWN SECONDARY SCHOOL CLEMENTI TOWN SECONDARY SCHOOL CLEMENTI TOWN SECONDARY SCHOOL CLEMENTI TOWN SECONDARY SCHOOL CLEMENTI TOWN SECONDARY SCHOOL READ THESE INSTRUCTIONS FIRST Do not open the booklet until you are told to do so. Write your name, register number and class on all the work you hand in. Write in dark blue or black pen. You may use an HB pencil for any diagrams or graphs. Do not use staples, paper clips, glue or correction fluid. Approved calculators are allowed. Answer all questions. The number of marks is given in brackets [ ] at the end of each question or part question. You should show all your working The total number of marks for this paper is 80. _______________________________________________________________________ This question paper consists of 11 printed pages, including this cover page. For Examiner’s Use 80

2 Clementi Town Secondary School Computing Secondary 4 Express Preliminary Examination 2019 Answer all the questions. 1 Write down THREE considerations when deciding on an external storage device. [3] 2 The following passage describes how the data flow when the computer is switched on. Fill in the blanks with the following helping words. [5] instructions basic input/output system (BIOS) ROM operating system power-on self-test (POST) The computer loads instructions for performing a from to ensure that all the hardware components are functioning properly. The computer then loads the from ROM. The BIOS provides basic on how to communicate with hardware components as well as where to look for an operating system. Assuming that an is found on the computer’s hard drive, its data and instructions are then loaded from the hard drive into RAM. 3 The following diagram shows the specification of the processor in 2 computers. (a) Write down 2 factors that affects the performance of a processor. [2] (i)