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Free Practice Quiz Question List

1. Data, Information, and the Data Life Cycle Online Quiz Questions

Use this free practice quiz with 20 questions to review 1. Data, Information, and the Data Life Cycle, test your knowledge, and prepare for your next test or exam.

20 questions
01
Choose one
1 point

A database stores the value 02139 as a ZIP code. Which data type is generally most appropriate for this field?

  1. A

    Integer

  2. B

    Text string

  3. C

    Decimal number

  4. D

    Categorical value

02
Choose one
1 point

How many different patterns can be represented by one byte?

  1. A

    8

  2. B

    16

  3. C

    256

  4. D

    512

03
Choose one
1 point

A facilities team wants to show how one building’s electricity consumption changes from January through December. Which visualization is usually the best starting choice?

  1. A

    A line chart

  2. B

    A bar chart with one bar for every word in the report

  3. C

    A pie chart with one slice for every date

  4. D

    A scatter plot using building names as numerical coordinates

04
Choose all
1 point

Which two items are examples of metadata for a sensor dataset? Select all correct choices.

  1. A

    The units used for a sensor measurement

  2. B

    The temperature reading recorded at 10:00

  3. C

    The meaning of each column in a table

  4. D

    The sensor’s measured value for a particular minute

05
Choose all
1 point

Which two actions are responsible approaches when cleaning a dataset? Select all correct choices.

  1. A

    Automatically delete every value far from the average

  2. B

    Investigate values that are far outside the expected range

  3. C

    Treat every blank value as zero

  4. D

    Record what changed, why it changed, and when it changed

06
True or false
1 point

True or false: If a chart shows that two variables changed together, the chart alone proves that one variable caused the other.

  1. A

    True

  2. B

    False

07
True or false
1 point

True or false: After lossy compression, decompression produces an identical copy of the original file.

  1. A

    True

  2. B

    False

08
Written response
1 point

Convert the binary number 01011010 to a decimal number. Enter the decimal value only.

09
Written response
1 point

The example library-visit records are dated in which month and year? Enter the answer in YYYY-MM format.

10
Fill in the blank
1 point

describe the structure, format, meaning, or origin of data, while helps people interpret recorded values meaningfully.

11
Fill in the blank
1 point

JSON records in which some entries have a location field and others do not are an example of data.

12
Open ended
1 point

A school plans to collect student and building data to study energy use. What should the team decide during the planning stage to make the project responsible and useful?

13
Choose one
1 point

A laboratory must archive scientific measurements so that every original value can be recovered exactly. Which choice is most appropriate?

  1. A

    Use lossy compression because scientific measurements are disposable

  2. B

    Use lossless compression because every original value must be preserved

  3. C

    Do not compress the data under any circumstances

  4. D

    Convert the measurements to a video before compressing them

14
Written response
1 point

What date is given in the opening list of example data values? Enter it in canonical YYYY-MM-DD format.

15
Choose one
1 point

Which example best represents semi-structured data?

  1. A

    A relational table with fixed columns for every customer

  2. B

    A JSON collection in which one record has a location field and another does not

  3. C

    A scanned photograph with no regular tabular schema

  4. D

    A spreadsheet containing one numeric value in each cell

16
Choose one
1 point

A research team archives scientific measurements and must be able to recover every original value after decompression. Which compression approach is most appropriate?

  1. A

    Use lossless compression so every original value can be reconstructed exactly.

  2. B

    Use lossy compression because permanently removing some information is acceptable.

  3. C

    Do not compress the data, even when exact reconstruction is required.

  4. D

    Use lossy compression and rely on visual inspection to restore removed values.

17
True or false
1 point

True or false: If a chart shows that two variables changed together over time, the chart by itself proves that one variable caused the other.

  1. A

    True

  2. B

    False

18
Written response
1 point

What whole-number decimal value does the binary pattern 01011010 represent?

19
Choose one
1 point

A sensor dataset contains a column of values labeled only 12.4. Which addition would most directly provide metadata needed to interpret that column?

  1. A

    A duplicate copy of the raw observations

  2. B

    Information describing the structure, meaning, origin, or processing of data

  3. C

    A statistical conclusion drawn after analyzing the data

  4. D

    A security password that prevents all access to a dataset

20
Choose one
1 point

A public-health dataset uses blanks for several different reasons, including unknown and not-applicable values. What is the most responsible cleaning action?

  1. A

    Record the missing-value status explicitly instead of treating every blank as zero

  2. B

    Delete every row containing a blank without checking the consequences

  3. C

    Replace every blank with the average of the column

  4. D

    Treat every blank as a measured value of zero