2023 ACSBR PRELIM P1 QP

This paper has 15 pages, inclusive of the cover page. Name: Class: Index Number: Anglo-Chinese School (Barker Road) PRELIMINARY EXAMINATION 2023 SECONDARY FOUR EXPRESS COMPUTING PAPER 1 7155/01 2 HOURS INSTRUCTIONS TO CANDIDATES: Do not open this booklet until you are told to do so. Write your name and index number clearly in the spaces at the top of this page. Write in dark blue or black pen. You may use soft pencil for any diagrams, graphs or rough working. Do not use staples, paper clips, highlighters, 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 of question. You should show all your working. The total mark for this paper is 80. TOTAL 80

Anglo-Chinese School (Barker Road) Preliminary Examination 2023 2 Secondary 4 Express Computing 7155/01 1 The diagram shows four types of data storage devices on the left and six descriptions of data storage on the right. Draw one or more lines from each device to its correct description(s). Device Description • Data stored is volatile Magnetic storage • • Small storage space < 10 MB Processor register • • Fastest transfer speed Random access memory (RAM) • • Secondary storage Read-only memory (ROM) • • Device has moving physical parts • Typically store terabytes of data [4]

Anglo-Chinese School (Barker Road) Preliminary Examination 2023 3 Secondary 4 Express Computing 7155/01 2 Aloysius has a computer that is assigned an Internet Protocol (IP) address. The IP v4 address is: 192.168.86.1 The IPv4 address is represented as denary values. (a) Convert the denary values 192 and 86 from the IPv4 address to 8-bit binary. 192 86 Working space [2] (b) Convert the denary value 192 into hexadecimal. Show your working. [2] (c) Aloysius’s computer is also assigned a MAC address and an IPv6 address. (i) MAC stands for [1] (ii) Identify one similarity between an IP address and a MAC address. [1] (iii) Identify one difference between an IP address and a MAC address. [1] (iv) Identify one difference between an IPv4 address and an IPv6 address. [1]

Anglo-Chinese School (Barker Road) Preliminary Examination 2023 4 Secondary 4 Express Computing 7155/01 (d) Aloysius sees the message “Set your browser to accept cookies”. (i) Explain what cookies are. [1] (ii) Explain why some websites make this request. [1]

Anglo-Chinese School (Barker Road) Preliminary Examination 2023 5 Secondary 4 Express Computing 7155/01 3 (a) The table contains statements about types of software. Tick (✓) one or more boxes in each row to indicate if the statement is true for the type of software. Statement FOSS Proprietary Public Domain Protected under copyright