Question Discussion & Solution

All terms are arranged in increasing order:

Pebble < Rock < Mountain

Similarly,

Lake < River < Sea

The correct answer is Scanner.

Key Points

• Scanner:
  • Scanner is an input device and can be used to scan images as well as text documents.
  • Scanner is not a pointing input device.
• ​Pointing device
  • A pointing device is an input interface that allows a user to input spatial data to a computer. 
  • Common pointing devices
    • Mouse
    • Trackball
    • Joystick
    • Pointing stick
    • Wii Remote
    • Finger tracking
    • Graphics tablet
    • Stylus
    • Finger tracking

Additional Information

• Track Ball:
  • The trackball is a pointing device consisting of a ball housed in a socket containing sensors to detect rotation of the ball about two axes, similar to an upside-down mouse..
  • Tracker balls are commonly used on CAD workstations​
• Digitizing Tablet:
  • A digitizer tablet is a peripheral device that allows users to draw on a computer screen.
• Joystick:
  • A joystick is a lever-type device that can be moved in several directions.
  • Used to control the movement of an image on a computer or similar display screen.

Below are a few types of Unconditional Control Structures

The “break” Statement

A break statement terminates the execution of the loop and the control is transferred to the statement immediately following the loop. 

Syntax : Jump-statement;  break;

The “continue” Statement

The continue statement is used to bypass the remainder of the current pass through a loop.

 Syntax : Jump-statement;  Continue;

The “goto” Statement

C supports the “goto” statement to branch unconditionally from one point to another in the program.

Syntax :

goto label;
.............
.............
.............
label:
statement;

Return Statement :

The return statement terminates the execution of a function and returns control to the calling function. Execution resumes in the calling function at the point immediately following the call.

 Syntax : Jump-statement: return expression;

 Therefore answer is goto statement i.e, Option 4 

Figure 3 is next figure in the series:

The dotted line moves clockwise from corner of the square in clockwise direction.

Hence, 3 is the correct answer.

The correct answer is Scatter plots.

Key Points

• Scatter plots
  • A correlation exists between two variables when one of them is related to the other in some way.
  • A scatterplot is the best place to start.
  • A scatterplot (or scatter diagram) is a graph of the paired (x, y) sample data with a horizontal x-axis and a vertical y-axis.
  • Each individual (x, y) pair is plotted as a single point.
  • Scatter plots are often used to find out if there's a relationship between variable X and Y. Hence, Option 2 is correct.
  • A scatterplot can identify several different types of relationships between two variables.
  • A relationship has no correlation when the points on a scatterplot do not show any pattern.
  • A relationship is non-linear when the points on a scatterplot follow a pattern but not a straight line.
  • A relationship is linear when the points on a scatterplot follow a somewhat straight line pattern. This is the relationship that we will examine.
• 

Additional Information