JWSS 2018 P1

Setter: Mr V Surya Class Index Number Name: Jurong West Secondary School Preliminary Examinations 2018 COMPUTING 7155/01 Secondary Four Express 27 August 2018 Paper 1 0800 – 1000 2 hours Candidates answer on the Question Paper. No Additional Materials are required. READ THESE INSTRUCTIONS FIRST Write your name, class and index number in the spaces provided 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. Do not use 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 marks for this paper is 80. This document consists of 14 printed pages. After checking of answer script Checked by Signature Date Student 80 _________________________________________________________________________________

2 JWSS Preliminary Examinations 2018 Computing (7155/01) Secondary 4 Express Answer all questions 1 Draw a line to match the computer parts to the correct description. 2 Cloud services allow users to run programs and access data anywhere over the Internet without having to be at a particular physical location. Describe two safety measures you can take to prevent unauthorised access to your private information when using cloud services. (a) Safety measure 1 ……………………………………………………………….. …………………………………………………………………………………….. …………………………………………………………………………………….. (b) Safety measure 2 ……………………………………………………………….. …………………………………………………………………………………….. …………………………………………………………………………………….. [2] Control Unit ALU Secondary Storage Collection of wires for transporting data from one part to another Stores large amount of data that will not be lost when power is interrupted Part of the processor that follows instructions and decides when the data should be stored, received or transmitted Part of the processor that processes data by performing basic mathematical and logical operations [4] CPU Bus ROM

3 JWSS Preliminary Examinations 2018 Computing (7155/01) Secondary 4 Express 3 Insert five of the following words about network devices and components, in the correct place in the text below. client network hub router SSID modem server network bridge port The ……………..…………… number is used together with an IP address to uniquely identify a program that is running on a network. The ……………..…………… is a device that connects multiple devices to the same network and transmits received packets to all connected devices. The ……………..…………… is a device that converts digital signals to analog signals and vice-versa. The ……………..…………… is a 32-bit string that identifies a wireless access point and all devices connect