Question Discussion & Solution

Explanation:

• The purpose of regression testing is to confirm that a recent program or code change has not adversely affected existing features.
• Regression testing is nothing but a full or partial selection of already executed test cases that are re-executed to ensure existing functionalities work fine.
• This testing is done to make sure that new code changes should not have side effects on the existing functionalities. It ensures that the old code still works once the new code changes are done.

The purpose of regression testing is to select test cases partially or fully to ensure existing functionalities work fine. Thus, regression testing is primarily related to functional testing

Need of Regression Testing

• Regression Testing is required when there is a change in requirements and code is modified according to the requirement or when one of the following has been done.
  • New feature is added to the software
  • Defect fixing
  • Performance issue fix

Total number of boxes of matchsticks = 3600

Total number of cartons = 10

Let the number of packets in one carton be x.

⇒ Number of packets in 10 cartons = 10x.

Number of boxes of matchstick in a packet = 30

⇒ Number of boxes of matchstick in 10x packets = 30(10x) = 300x

So, we have:

Total number of boxes = Number of boxes of matchstick in 10x packets

⇒ 300x = 3600

⇒ x = 12

Detailed Video Concept and solution

Levers are classified into three types or class based on the position of load and effort on the fulcrum;

Class 1 Lever:

• A Class 1 lever has the fulcrum placed between the effort and load
• The movement of the load is in the opposite direction of the movement of the effort
• E.g. crowbars, scissors, pliers, tin snips and seesaws

Class 2 Lever

• A Class 2 lever has the load between the effort and the fulcrum
• In this type of lever, the movement of the load is in the same direction as that of the effort
• E.g. nutcrackers, wheelbarrows, doors, and bottle openers

Class 3 lever

• A Class 3 lever has the effort between the load and the fulcrum
• Both the effort and load are in the same direction
• E.g. tweezers, arm hammers, and shovels

The correct answer is Chhattisgarh.

• Mahanadi river originates from the mountainous terrain of Chhattisgarh.

Key Points

• It originates from many mountain rivers with its origin water located in the Dhamtari district of Chhattisgarh.
• The river originates from an extension of the Eastern Ghats.
• It flows in Odisha where it joins the Bay of Bengal.
• Other names of Mahanadi are Kanaknandini, Chitrapalal, Mahasweta, Nilotpala etc.
• Hirakud Dam is built on the Mahanadi. It is the longest earthen dam in the world.​

Given pair is Thing: Main element

Prime constituent of pen is Ink

Similarly, prime constituent of Cigarette is Tobacco