IT Practical Tasks Chapter Overview
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Questions and Answers

What is a key feature of unstructured interviews?

  • Data is collected through questionnaires
  • A strict set of questions is followed
  • Interviews are highly standardized
  • Interviewees can expand on their answers (correct)

    • Observation involves relying on interviewees' answers for data collection.

    False

    What does data logging involve?

    Using computers and sensors to collect and analyze data.

    Data logging systems are often used in __________ circumstances.

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

    Match the data collection methods with their descriptions:

    <p>Unstructured Interviews = Flexible conversation allowing detailed responses Observation = Watching and recording events as they occur Data Logging = Using sensors to gather continuous data</p> Signup and view all the answers

    Which of the following is an example of observation in practice?

    <p>Counting vehicles at a road junction</p> Signup and view all the answers

    What file must be opened and examined for Task 8e?

    <p>Stock.csv</p> Signup and view all the answers

    Data logging can only be used in laboratory settings.

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

    Activities are included in each chapter to help check your understanding of the concepts.

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

    Name one application where data logging is essential.

    <p>Monitoring systems in volcanoes or nuclear reactors.</p> Signup and view all the answers

    What should you always check when writing algorithms with nested loops to avoid common errors?

    <p>The number of WHILE statements matches the number of ENDWHILEs.</p> Signup and view all the answers

    You must save the spreadsheet for Task 8e as ______.

    <p>Task_8e</p> Signup and view all the answers

    Match the following tasks with their corresponding descriptions:

    <p>Task 8e = Open and examine Stock.csv Activity 1a = Explain the difference between data and information Advice boxes = Provide tips to improve ICT skills Common error = Mismatch between WHILE statements and ENDWHILEs</p> Signup and view all the answers

    What kind of errors are highlighted in the Advice boxes?

    <p>Common errors with nested loops</p> Signup and view all the answers

    The source files required for practical chapters can be downloaded from a specific website.

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

    What is one main goal of the tasks outlined in the chapters?

    <p>To develop practical skills alongside knowledge and understanding.</p> Signup and view all the answers

    Which method involves collecting data directly from individuals affected by river pollution?

    <p>Conducting interviews and questionnaires</p> Signup and view all the answers

    Direct data sources always provide the most accurate information.

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

    Name one disadvantage of using indirect data sources.

    <p>Potential inaccuracy or outdated information.</p> Signup and view all the answers

    _____ can be used to gather real-time information from a river for pollution studies.

    <p>Computers with sensors</p> Signup and view all the answers

    Match the following data collection methods to their descriptions:

    <p>Direct data = Information collected firsthand from sources Indirect data = Information derived from secondary sources Sensors = Devices used for real-time data collection Questionnaires = Surveys distributed to collect opinions or data</p> Signup and view all the answers

    Which of these is not a direct method of collecting data on river pollution?

    <p>Reviewing government pollution reports</p> Signup and view all the answers

    All data collected from government departments is considered direct data.

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

    What is one advantage of using direct data sources?

    <p>Higher accuracy due to firsthand information.</p> Signup and view all the answers

    What is one advantage of using direct data?

    <p>Ensures the reliability of data</p> Signup and view all the answers

    Indirect data collection methods guarantee the reliability of the data.

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

    What is one disadvantage of direct data collection?

    <p>Small sample size due to time and cash restraints.</p> Signup and view all the answers

    Indirect data sources tend to provide larger sets of data that would use up less time and money than using __________ data collection.

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

    Match the following data types with their characteristics:

    <p>Direct Data = Known reliability and sourced directly Indirect Data = Larger sample size and less expensive Sampling Bias = Not representative of the whole group Data Origin = Essential for direct data credibility</p> Signup and view all the answers

    What could be a challenge when using direct data?

    <p>Gaining access to certain groups</p> Signup and view all the answers

    Sampling bias occurs when the sample group accurately represents the whole population.

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

    How does indirect data allow for increased confidence in results?

    <p>By providing a greater sample size.</p> Signup and view all the answers

    What does SSL/TLS primarily protect during data transmission?

    <p>The data from eavesdroppers</p> Signup and view all the answers

    Only websites with an HTTP address use SSL/TLS.

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

    What is the role of a certificate authority (CA) in SSL/TLS?

    <p>To issue valid SSL certificates after performing checks.</p> Signup and view all the answers

    SSL/TLS certificates are commonly referred to as ______ certificates today.

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

    What can happen if hackers break through a CA's security?

    <p>They can issue bogus certificates.</p> Signup and view all the answers

    Match the following components of a digital certificate with their descriptions:

    <p>Domain name = The name of the website associated with the certificate Public key = Used to encrypt data during transmission Certificate authority = The entity that issues the certificate Digital signature = Ensures authenticity of the certificate</p> Signup and view all the answers

    A website needs an SSL certificate to verify ownership and prevent fraud.

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

    What does HTTPS stand for?

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

    Study Notes

    Practical Chapters Overview

    • Practical chapters include tasks with step-by-step instructions for skill development.
    • Tasks utilize source files available for download to facilitate hands-on practice.

    Data Handling and Analysis

    • Stock.csv serves as an example to view and save stock data in spreadsheets.
    • Activities provide opportunities to test understanding and apply learned concepts.
    • Importance of differentiating between data and information emphasized.

    Data Collection Methods

    • Observation: Direct method of collecting data by witnessing events or behaviors.
      • Example: Counting traffic at a junction to determine the necessity of traffic lights.
    • Data Logging: Use of computer and sensors for continuous data collection and analysis.
      • Commonly used in scientific monitoring and environments where human data collection risks inaccuracies.

    Sources of Data

    • Direct Data: Collected first-hand, provides reliability but may be limited by sample size and accessibility.
    • Indirect Data: Origin is often unknown, but larger datasets can be gathered with less resource expenditure.

    Advantages and Disadvantages of Data Types

    • Direct data is trustworthy and allows representative sampling, reducing bias.
    • Indirect data collection can result in broader insights but risks sampling bias due to unknown origins.

    Quality of Information

    • Data reliability is crucial, especially when applying statistical measures.
    • Direct approaches give more control over data quality but are resource-intensive, whereas indirect methods are efficient but may lack specificity.

    SSL/TLS Protocol

    • SSL/TLS should be utilized for secure online transactions and information exchange.
    • Protocol ensures safe communication between web servers and browsers, protecting data from eavesdroppers.
    • Digital certificates are instrumental in verifying server identity and maintaining trust in online commerce.
    • CA (Certificate Authority) is responsible for issuing unique SSL certificates following security checks.
    • Vulnerability exists if hackers compromise CA security, potentially leading to unauthorized certificate issuance.

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    Related Documents

    Graham Brown, Brian Sargent - Cambridge International AS Level Information Technology Student's Book-Hodder Education (2024).pdf

    Description

    This quiz focuses on the practical chapters of IT, particularly the tasks associated with analyzing source files like TuckShop.csv and Widget.csv. Prepare to demonstrate your understanding of the techniques used in this chapter. Engage with the concepts and processes that underpin practical IT functions.

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