BLSS 2018 Computing P1

BOON LAY SECONDARY SCHOOL PRELIMINARY EXAMINATION 2018 Name ( ) Class Subject : COMPUTING Paper No : 1 Subject Code : 7155/01 Level : SECONDARY FOUR EXPRESS Date/Day : 18 SEPTEMBER 2018 (TUESDAY) Time : 0800 – 1000 Duration : 2 HOURS Candidates answer on the Question Paper. No Additional Materials are required. READ THESE INSTRUCTIONS FIRST Before you start your exam, check that you have received the correct paper and the number of printed pages are correct. Write your name, index number and class in the spaces at the top of this page. 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.

2 [Turn over This document consists of 12 printed pages. 1 A computer system stores and retrieves data from a few types of memory. Name three types of memory that are commonly found in a computer system and describe each of them in terms of their speed, size, and/or location. Type 1…………………………………………………………………………..…………...…… Description……………………………………………………………………..…………...…… ...........…………………………………………………………………………..…………...…… Type 2…………………………………………………………………………..…………...…… Description……………………………………………………………………..…………...…… ...........…………………………………………………………………………..…………...…… Type 3…………………………………………………………………………..…………...…… Description……………………………………………………………………..…………...…… ...........…………………...……………………………………………………...……..………[6] 2 (a) A network is to be setup to allow internet access in the school canteen. Mr Tan is considering between setting up a wired, or a wireless network. Describe two differences between wired and wireless networks. Difference 1…….……………………………………………………..………….....…… ..……………………………………………………………………………..…………..... ..……………………………………………………………………………..…...……….. Difference 2…….……………………………………………………..………….....…… ..……………………………………………………………………………..…………..... ..……………………………………………………………………………..…...…..…[2] (b) What advantage and disadvantage does wireless networks have compared to wired networks for the case in part(a)? Advantage….……………..…………………………………………..………….....…… ..……………………………………………………………………………..…………..... ..……………………………………………………………………………..…...……….. Disadvantage……………..…………………………………………..………….....…… ..……………………………………………………………………………..………….....

3 [Turn over ..……………………………………………………………………………..…...…..…[2] 3 The spreadsheet data below shows the contributions of students for a class party. (a) Write down a formula that will count the number of students who are bringing more than 2 family members. = ..…………………………………………………………………………..…...…..…[2] (b) Write down a formula that has been entered in cell C4 and has b