Question Discussion & Solution

% → modulus operator

printf() function

The printf() function is used for output. It prints the given statement to the console.

Analysis:-

m = m%(m*3)

Calculation:

m = 23 mod (23 × 3)

m = 23 mod 69  

m = 23 

Note:

Assignment operator associativity is right to left.

Printf statement will print the value of m as 23. (Output would be 23).

Confusion PointsHere 23 mod 69 means. 23 is divided by 69. That's why 23 is the answer. For better clarity, you can run the above program and check.

Additional Information 

16 = 4²

100 = 10²

196 = 14²

216 = 6³

16, 100 and 196 are the perfect squares whereas 216 is a perfect cube.

Explanation:

Composting is one of the options for the treatment of solid waste. In the composting process, the organic matter breaks down under bacterial action resulting in the formation of humus like material called compost.

• Vermicomposting: It involves the use of earthworms for composting organic solid waste. It is a resourceful way to recycle your food waste into compost. It takes about 2-3 months.
• Vermicompost (worm manure) is the end-product of the breakdown of organic matter by earthworms. 
• This process of increasing the fertility of soil by earthworms is known as vermicomposting.

Hence, fertilizer produced by the earthworm is called Vermicompost.

Additional Information

Biofertilizers: 

• ​Is a substance that contains living micro-organisms that, when applied to seeds, plant surfaces, or soil, colonize the rhizosphere or the interior of the plant and promotes growth by increasing the supply or availability of primary nutrients to the host plant. 
• Biofertilizers add nutrients through the natural processes of Nitrogen fixation.
• Examples: Rhizobium, Azotobacter, Blue-green algae, Azospirilium.

Nitrogen fertilizer:

• Urea, also known as carbamide, is an organic compound with the chemical formula CO(NH₂)₂.
• This amide has two –NH₂ groups joined by a carbonyl functional group.
• Urea serves an important role in the metabolism of nitrogen-containing compounds by animals and is the main nitrogen-containing substance in the urine of mammals.
• The main function of Urea fertilizer is to provide the plants with nitrogen to promote green leafy growth and make the plants look lush.
• Urea has the highest nitrogen content of all solid nitrogenous fertilizers in common use.

Pattern followed is,

D + 6 = J

J + 5 = O

O + 4 = S

S + 3 = V

V + 2 = X

Hence, “O” is the correct answer.

Given : Cobbler : Shoes – Cobbler mends our shoes.

Electrician : Screw – Screw is a tool used by electricians.

Carpenter : Jig – Jig is a tool used by carpenters.

Mechanic : Car – Mechanic mends our cars.

Manager : Office – Manager is a superior person who handles the administrative work of an office.