System Development Cycle
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Questions and Answers

What is the primary purpose of an algorithm?

  • To develop a computer program
  • To design a flowchart
  • To provide step-by-step instructions to a computer (correct)
  • To perform calculations and data processing

    • What will result from giving a computer a poor algorithm?

  • A poor result (correct)
  • A flowchart
  • A correct solution to the problem
  • An efficient computer program

    • What is the importance of planning in computational thinking?

  • To create a flowchart
  • To ensure the problem is broken down into smaller parts
  • To make sure the solution is correct (correct)
  • To develop a computer program

    • What are the two main ways to represent an algorithm?

    <p>Flowcharts and pseudocode</p> Signup and view all the answers

    What is the reason for using computational thinking and decomposition?

    <p>To break down a problem into smaller parts</p> Signup and view all the answers

    What is the purpose of an algorithm in everyday tasks?

    <p>To provide a set of instructions</p> Signup and view all the answers

    What is essential for an algorithm to be effective?

    <p>All of the above</p> Signup and view all the answers

    What is the relationship between an algorithm and a computer program?

    <p>An algorithm is used to create a computer program</p> Signup and view all the answers

    What is the primary objective of the feasibility study in the system development cycle?

    <p>To evaluate the practicality of the proposed system</p> Signup and view all the answers

    Which of the following is NOT a problem of system development life cycle?

    <p>System scalability</p> Signup and view all the answers

    What is the primary purpose of a data flow diagram?

    <p>To represent the flow of data through the system</p> Signup and view all the answers

    In which stage of the systems life cycle is a flowchart normally found?

    <p>Design stage</p> Signup and view all the answers

    Why may a questionnaire be preferred over an interview?

    <p>Because it allows for a larger sample size</p> Signup and view all the answers

    What is the primary disadvantage of interviews in systems analysis?

    <p>They are time-consuming</p> Signup and view all the answers

    What is the purpose of the investigative study in the system development cycle?

    <p>To analyze the system's requirements and define the problem</p> Signup and view all the answers

    What is the primary task of the analyst during the systems analysis stage?

    <p>To identify the system's functional and non-functional requirements</p> Signup and view all the answers

    What is the primary purpose of a cyber café?

    <p>To provide internet access to the public for a fee</p> Signup and view all the answers

    What does FTP stand for?

    <p>File Transfer Protocol</p> Signup and view all the answers

    What is the language of the web?

    <p>HTML</p> Signup and view all the answers

    What is the term for transferring a file from a remote computer to a local computer?

    <p>Download</p> Signup and view all the answers

    What is the term for a collection of World Wide Web pages or files?

    <p>Website</p> Signup and view all the answers

    What is the abbreviation for Hypertext Transfer Protocol?

    <p>HTTP</p> Signup and view all the answers

    What is the term for an online text-based communication between internet users?

    <p>Chat</p> Signup and view all the answers

    What is the term for an organisation that provides access to the internet and web hosting?

    <p>ISP</p> Signup and view all the answers

    What is the primary purpose of desk checking in the problem-solving process?

    <p>To manually check the logic of an algorithm</p> Signup and view all the answers

    What is the role of a compiler in the program development process?

    <p>To translate source code into object code</p> Signup and view all the answers

    What is the ultimate goal of problem analysis in the program development process?

    <p>To become familiar with the problem to be solved</p> Signup and view all the answers

    What is the primary purpose of program documentation?

    <p>To provide comprehensive information on a program's capabilities and limitations</p> Signup and view all the answers

    What is the definition of an algorithm?

    <p>A set of step-by-step instructions to solve a problem</p> Signup and view all the answers

    What is the primary purpose of flowcharting in the program development process?

    <p>To provide a pictorial representation of a program's logic</p> Signup and view all the answers

    What is the primary purpose of testing and debugging in the program development process?

    <p>To discover and correct programming errors</p> Signup and view all the answers

    What is the relationship between an algorithm and a flowchart?

    <p>A flowchart is a pictorial representation of an algorithm</p> Signup and view all the answers

    What is the primary purpose of an algorithm?

    <p>To resolve a problem through a set of step-by-step instructions</p> Signup and view all the answers

    What is the relationship between a flowchart and an algorithm?

    <p>A flowchart is a way to represent an algorithm</p> Signup and view all the answers

    What is the primary difference between a flowchart and pseudocode?

    <p>A flowchart uses symbols, while pseudocode uses words</p> Signup and view all the answers

    What is the purpose of an arrow in a flowchart?

    <p>To link each instruction in a flowchart</p> Signup and view all the answers

    What is the correct symbol for a decision in a flowchart?

    <p>A diamond</p> Signup and view all the answers

    What are the three parts of an algorithm?

    <p>Not specified in the content</p> Signup and view all the answers

    What is an example of an algorithm, according to the content?

    <p>A recipe</p> Signup and view all the answers

    What is the relationship between a recipe and an algorithm?

    <p>A recipe is an example of an algorithm</p> Signup and view all the answers

    Study Notes

    System Development Cycle

    • The system development cycle consists of several stages, including Preliminary Study, Evaluation/Study, Feasibility Study, System Analysis, System Design, Implementation, and Maintenance.
    • Each stage involves a specific set of activities and tasks that aim to develop and implement a system.

    Problems of System Development Life Cycle

    • System delimitation/boundary: defining the scope and boundaries of the system.
    • Components of a system must communicate with each other: ensuring that all components of the system interact and work together effectively.
    • Production cost and delivery time: managing the cost and time required to develop and implement the system.
    • Misunderstanding of requirement definition: ensuring that the requirements of the system are clearly defined and understood.
    • System growth and changes: managing changes and updates to the system over time.

    Analysis Phase

    • There are four main ways of collecting information during the analysis phase:
      • Interviews
      • Questionnaires
      • Observation
      • Review of existing documents

    Systems Analysis Stage

    • The analyst performs six main tasks during the systems analysis stage:
      • Defining the problem
      • Identifying the requirements
      • Gathering data
      • Analyzing data
      • Developing a solution
      • Evaluating the solution

    Data Flow Diagram

    • A data flow diagram is a pictorial representation of the flow of data through a system.
    • It is used to model the flow of data and to identify the processes and systems involved.

    Flowchart

    • A flowchart is a pictorial representation of the logic involved in solving a problem.
    • It is used to depict the step-by-step sequence of a program and to identify the decisions and processes involved.

    Algorithm

    • An algorithm is a set of step-by-step instructions to solve a problem.
    • It is a plan or a set of rules that define how to solve a problem in a finite and ordered sequence.
    • Algorithms are used for many different things, including calculations, data processing, and automation.

    Function of Algorithms

    • An algorithm takes some input, carries out a number of effective steps in a finite amount of time, and produces some output.
    • Algorithms are used to plan out the solution to a problem and to break down the problem into smaller parts.

    Computational Thinking

    • Computational thinking involves using algorithms to solve problems and to make decisions.
    • It involves breaking down problems into smaller parts, identifying the steps required to solve the problem, and using algorithms to carry out those steps.

    Representing an Algorithm

    • There are two main ways to represent an algorithm:
      • Pseudocode
      • Flowcharts

    Pseudocode

    • Pseudocode is a way of describing a set of instructions that doesn't use specific syntax.
    • It is used to represent an algorithm in a way that is easy to understand and to implement.

    Flowchart

    • A flowchart is a diagram that represents a set of instructions.
    • It is used to represent an algorithm in a visual way and to identify the steps and decisions involved.

    Internet Technology

    • Cyber café: a place that provides internet access to the public, usually for a fee.
    • Cyber space: the electronic medium of computer networks, in which online communication takes place.
    • Download: transferring a file from a remote computer to a local computer.
    • Upload: transferring a file from a local computer to a remote computer.
    • Email: electronically transmitted mail.
    • File Transfer Protocol (FTP): the standard method for downloading and uploading files over the Internet.
    • Homepage: the first page that appears when you visit a website.
    • HTTP: the set of rules by which web pages are transferred across the Internet.
    • URL: the address of a specific web page or file on the Internet.
    • World Wide Web (WWW): a system of interlinked hypertext documents accessed via the Internet.
    • Website: a collection of World Wide Web pages or files.
    • Web page: a single hypertext file or a page that is part of a website.
    • Web server: a computer that delivers web content to web browsers.
    • Chat: online text-based communication between internet users.
    • Chat room: a part of an online service that provides a venue for communities of users with common interests to communicate in real-time.
    • HTML: the language of the web.
    • ISP: an organization that provides access to the internet and web hosting.

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    Description

    This quiz covers the stages of system development, from preliminary study to maintenance. It includes feasibility study, evaluation, and implementation.

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