SRSS 2019 P1

This question paper consists of 16 printed pages including the cover page. [Turn over Name_______________________________________ ( ) Class: Sec ___________ SERANGOON SECONDARY SCHOOL PRELIMINARY EXAMINATION 2019 SECONDARY 4 EXPRESS COMPUTING 7155/01 PAPER 1 30 AUGUST 2019 Name of Setter: Mr Adrial Tan 2 hours READ THESE INSTRUCTIONS FIRST Do not open the question papers until you are told to do so. Write in dark blue or black pen in the spaces provided on the Question Paper. You may use a soft pencil for any diagrams, graphs, music or rough working. Do not use staples, paper clips, highlighters, glue or correction fluid. Answer all questions. No marks will be awarded for using brand names of software packages or hardware. At the end of the examination, fasten all your work securely together. The number of marks is given in brackets [ ] at the end of each question or part question. FOR EXAMINER’S USE 80

2 1 The following diagram shows five network terms and six descriptions. Draw a line between each network term to the most appropriate description. Network Term Description [5] IP Address MAC Address Service Set Identifier Ring Topology Star Topology An identifier that is automatically assigned by a router. It is required to receive and forward data packets out of a network A network configuration that requires a central device such as a hub or a bridge to manage the transmission of data. A 32-byte long string that identifies a wireless access point and all devices connected to it. A network configuration where the entire network may fail whenever any computer in the network fails. An identifier that is required to receive and forward data packets within a network through a network bridge. A network configuration where all computers are connected together through a single common cable.

3 2 (a) Convert the binary number (10000101)2 into a denary number. Show your workings. ……………………………………………………………………………………………. ……………………………………………………………………………………............ ……………………………………………………………………………………………. ……………………………………………………………………………………………. ………………………………………………………………………………………… [2] (b) Convert the hexadecimal (FB)16 into a binary number. Show your workings. ……………………………………………………………………………………………. ……………………………………………………………………………………............ ……………………………………………………………………………………………. ……………………………………………………………………………………………. ………………………………………………………………………………………… [2] (c) Convert the binary number (11110)2 into a hexadecimal number. Show your workings. ……………………………………………………………………………………………. ……………………………………………………………………………………............ ……………………………………………………………………………………………. ……………………………………………………………………………………………. ………………………………………………………………………………………… [2] (d) Convert the hexadecimal (365)16 into a denary number. Show your workings. ……………………………………………………………………………………………. ……………………………………………………………………………………............ ……………………………