ZHSS 7155_PRELIMS_2022_4E_P1_QP

ZHONGHUA SECONDARY SCHOOL PRELIMINARY EXAMINATION 2022 SECONDARY 4 EXPRESS Candidate’s Name Class Register Number COMPUTING 7155/01 Paper 1 Written 14 September 2022 2 hours Candidates answer on the Question Paper. No additional Materials are required. READ THESE INSTRUCTIONS FIRST 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, graphs or rough working. Do not use staples, paper clips, glue, correction fluid or correction tape. 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 of the marks for this paper is 80. Setter: Mr. Calvin Heng Vetted by: Mr. Low Kee Ley For Examiner’s Use TOTAL This question paper consists of 16 printed pages including this cover page.

2 1 The following shows a Computer Architecture diagram. (a) Complete the table below by filling in the missing words. Some of the labels have been done for you. Note: Acronyms are not allowed! LABEL NAME A ARITHMETIC LOGIC UNIT B CONTROL UNIT C D RANDOM ACCESS MEMORY E

3 LABEL NAME F G H X Y OUTPUT [6] (b) State two functions of the device labelled B. ……………………………………………………………………………… ……………………………………………………………………………… [2] (c) Approximately how many times larger (in terms of physical address space) is a 64 bit processor compared against a 32 bit processor? (working must be clearly shown.) ……………………………………………………………………………… ……………………………………………………………………………… ……………………………………………………………………………… [2]

4 2 The Urban Redevelopment Authority (URA), Housing Development Board (HDB) and Government Technology Agency of Singapore (GovTech) collaborated to provide a public service using a mobile App for the purpose of administering vehicle parking. This App is used by motorists to pay for parking at paper coupon based public parking spaces. After the vehicle is parked, the motorist starts the mobile App and selects the name of the road and enters the estimated parking duration (in units of 30 minutes), followed by pressing the START button (the App reads in the time from the mobile phone’s clock). Prior to leaving the parking space, the motorist ends the parking session by pressing the END NOW button (the App reads in the time from the mobile phone’s clock). The App then calculates the monetary amount owed (based on the parking duration referenced against a parking rate table) and deducts the amount via a pre -arranged setting (i.e., from the motorist’s credit card). The amount will also be displayed on the screen. State the inputs, output and processes involved with this mobile App: Inputs: i. …………………………