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This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.

1.	Write a note on bar diagram.
Answer» A bar chart or bar graph is a chart or graph that presents categorical data with rectangular bars with heights or lengths proportional to the values that they represent. The bars can be plotted vertically or horizontally. A vertical bar chart is sometimes called a line graph.

2.	A component part chart can be presented in the form of :A. CircleB. BarsC. Both circles and barsD. Triangles.
Answer» Correct Answer - C C

3.	In what way a histogram is different from a bar diagram?
Answer» A histogram represents the frequency distribution of continuous variables. Conversely, a bar graph is a diagrammatic comparison of discrete variables. Histogram presents numerical data whereas bar graph shows categorical data. The histogram is drawn in such a way that there is no gap between the bars.

4.	Explain freqeuncy polygens.
Answer» A frequency polygon is another type of frequency distribution graph. In a frequency polygon, the number of observations is marked with a single point at the midpoint of an interval. A straight line then connects each set of points.

5.	Distinguish between independent and dependent variable with the help of an example.
Answer» The two main variables in an experiment are the independent and dependent variable. An independent variable is the variable that is changed or controlled in a scientific experiment to test the effects on the dependent variable. A dependent variable is the variable being tested and measured in a scientific experiment.

6.	Explain the meaning and types of diagrams.
Answer» The definition of a diagram is a graph, chart, drawing or plan that explains something by showing how the parts relate to each other. The current UML standards call for 13 different types of diagrams: class, activity, object, use case, sequence, package, state, component, communication, composite structure, interaction overview, timing, and deployment.

7.	A diagram is:A. Exact alternative to dataB. Close substitute of dataC. An aid to understanding of dataD. All the above.
Answer» Correct Answer - C C

8.	Write a note on pie diagram.
Answer» A pie chart (or a circle chart) is a circular statistical graph, which is divided into slices to illustrate numerical proportion. In a pie chart, the arc length of each slice (and consequently its central angle and area), is proportional to the quantity it represents.

9.	Explain briefly the uses of time series analysis.
Answer» Time series Analysis helps us understand what are the underlying forces leading to a particular trend in the time series data points and helps us in forecasting and monitoring the data points by fitting appropriate models to it.

10.	Differentiate between grouped and ungrouped data.
Answer» Both are useful forms of data but the difference between them is that ungrouped data is raw data. This means that it has just been collected but not sorted into any group or classes. On the other hand, grouped data is data that has been organized into groups from the raw data.

11.	State the procedure for constructing a histogram.
Answer» 1) On the vertical axis, place frequencies. Label this axis "Frequency". 2) On the horizontal axis, place the lower value of each interval. 3) Draw a bar extending from the lower value of each interval to the lower value of the next interval.

12.	Write a note on component part diagram.
Answer» A component is a logical unit block of the system, a slightly higher abstraction than classes. It is represented as a rectangle with a smaller rectangle in the upper right corner with tabs or the word written above the name of the component to help distinguish it from a class.

13.	The choice of diagram is determined by:A. Resources with the investigatorB. Points to be highlightedC. The form, in which data is availableD. All the above.
Answer» Correct Answer - D D

14.	A Triple Bar Chart is:-A. One dimensionalB. Two dimensionalC. Three dimensionalD. All the above.
Answer» Correct Answer - C C