2021 SPS Computing P1 Solutions

[Turn over NAME CLASS INDEX NO. MARKING SCHEME ST. PATRICK'S SCHOOL PRELIMINARY EXAMINATION 2021 SUBJECT : Computing Paper 1 (7155/01) DATE : 23 August 2021 LEVEL : Secondary 4 Express DURATION : 2 hours INSTRUCTIONS TO CANDIDATES: Write your Name, Class and Index No. in the spaces at the top of this page. Write in dark blue or back pen. You may use a soft pencil for any diagrams or graphs. Do not use staples, paper clips, glue or correction fluid. Answer all the questions. The use of an approved scientific calculator is expected, where appropriate. You are reminded of the need for clear presentation in your answers. The number of marks is given in brackets [ ] at the end of each question or part question. The total number of marks for this paper is 80. INFORMATION FOR CANDIDATES: The allocated marks for each question are indicated in the brackets [ ]. For Examiner’s Use Score /80 This question paper consists of 14 printed pages, including the cover page. 1 Five items of computer architecture and six descriptions are given. Candidates answer on the Question Paper.

2 Draw one line from each item to its appropriate description. Item Description Data bus Transfers required memory location from processor to memory; uni-directional Address bus Stores data, instructions and the results of processing for immediate use Secondary storage Extremely fast but small data storage spaces used directly by the ALU and control unit Memory Transfers data between memory and processor; bi-directional Processor register Stores large amounts of data that will not be lost when power supply is interrupted Processes data and follows instructions; consists of an arithmetic logic unit and a control unit [5]

3 [Turn over 2 A software company is creating an online learning portal for adult learners. (a) The user must first register an account in the portal. The user will then receive a verification email. Upon successful verification, the user can now login to the portal. In the portal, a registered user will be able to access the profile page where he/she can edit his/her personal information, email address, password and profile picture. The user can also access the courses page where he/she can view the details of the various courses available and select the courses that he/she wishes to enroll. Upon enrolling into a course, he/she can access the course materials and the portal will automatically track his/her learning progress. During the planning stage, the problem must be decomposed into smaller, more manageable parts called modules. Identify and describe two of these modules. 1 Registration module – describe the function 2 Courses modul