Question Discussion & Solution

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

The logic followed here is:-

The first two words are antonyms of each other.

'Always' is antonym of 'Never'.

Similarly,

The fourth word should be the antonym of the third word.

'Down' is antonym of 'Up'.

So, Never : Always :: Up : Down.

Hence, the correct answer is "Down".

The correct answer is option 2 i.e 19.

• Potassium is a member of the alkali group of the periodic table.
  • Symbol: K.
  • Atomic number: 19.
  • Belongs to group 1 in the periodic table.
  • First isolated in 1807 by Humphry Davy.
  • Sodium and Potassium are the elements known as soft metals(can cut with a knife with little force).
  • Potassium metal is kept in kerosene due to its high reactivity with water.
  • Potassium bicarbonate is the chemical used in fire extinguishers.
  • Potassium is the most common radioisotope in the human body.
  • Potassium is the second least dense metal after lithium.
• Atomic Number 17: Chlorine.
• Atomic Number 18: Argon.
• Atomic Number 20: Calcium.

The variable is the basic unit of storage in a Java program. A variable is defined by the combination of an identifier, a type, and an optional initializer.

Variable names cannot be keyword, it is case- sensitive and the first character must be a letter.

In Java, all variables must be declared before they can be used. The basic form of a variable declaration is:

type identifier [ = value ][, identifier [= value ] …];

Examples:

int a, b;

int a = 10, b = 20, c = 30;

int a, b = 20, c;

Confusion point

In Java, variable name can also start with underscore character “_”, or a dollar sign “$”.

Best Possible answer is chosen.

The correct answer is Camel.

Key Points

• The state animal of Rajasthan is Camel.
• Camel was adopted as the state animal of Rajasthan to control the decreasing number of camels in the state. 
• It was adopted in 2014 by the Rajasthan state government.

Additional Information

• State Bird: Great Indian Bustard.
• State Animal (Wildlife) - Chinkara
• State Flower: Rohida.
• Chinkara is also the official animal of Rajasthan.
• National Park: Sariska National Park, Ranthambore National Park, Desert National Park, and Keoladeo Ghana National Park.
• Geographical indication: Kota Doria, Kathputlis, Blue pottery, Molela, clay work, Sanganeri Hand Block Printing, Phulkari, Bikaneri Bhujia, Bagru hand block print, Thewa artwork, Makrana marble.