Questions

Q:

An air bubble in water will act like a

A) convex lens B) convex mirror
C) concave lens D) concave mirror
 
Answer & Explanation Answer: C) concave lens

Explanation:

An_air_bubble_in_water_will_act_like_a1557488532.jpg image

The lens which have atleast one inward curved surface is a concave lens. Concave ens is a diverging lens as it spreads out light rays that have been refracted through it.

A concave lens is thinner at its centre than at its edges.

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Filed Under: Physics
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Q:

The phenomenon of summer sleep by animals is called

A) hibernation B) aestivation
C) laziness D) lethargy
 
Answer & Explanation Answer: B) aestivation

Explanation:

Aestivation is summer sleep. Many organisms like the snails do not find it comfortable in summer. They withdraw and lead a life with reduced BMR (basic Metabolic Rate) in a state of  dormancy.

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Filed Under: Biology

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Q:

What is the full form of GDP

A) Gross domestic product B) Global domestic Ratio
C) Gross depository revenue D) Global depository receipts
 
Answer & Explanation Answer: A) Gross domestic product

Explanation:

GDP full form is Gross domestic product.

 

It is a measurement of a nation’s overall economic activity. 

GDP is the monetary value of all the finished goods and services produced within a country's borders in a specific time period.

 

gdp_full_form_is1536139309.jpg image

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Filed Under: Indian Economy
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Q:

enum colors {BLACK,BLUE,GREEN}

main()

{

printf( "%d..%d..%d", BLACK, BLUE, GREEN );

return(1);

}

A) 1..2..3 B) 0..1..2
C) 1..1..1 D) 0..0..0
 
Answer & Explanation Answer: B) 0..1..2

Explanation:

enum assigns numbers starting from 0, if not explicitly defined.

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Q:

Read the passage carefully and choose the best answer to each question out of the four alternatives.


Prebiotics are the lesser-known gut-health promoters which serve as food for good bacteria inside the gut. "We found that dietary prebiotics can improve non-REM (random eye movement) sleep, as well as REM sleep after a stressful event," said Robert Thompson, a PhD researcher at University of Colorado Boulder in the U.S. Prebiotics are dietary fibres found naturally in foods like artichokes, raw garlic, leeks and onions.

When beneficial bacteria digest prebiotic fibre, they not only multiply, improving overall gut health, but they also release metabolic by-products. Researchers fed three-week-old male rats a diet of either standard chow or chow that included prebiotics. They then monitored the rats' body temperature, gut bacteria and sleep-wake cycles — using electroencephalogram (EEG), or brain activity testing over time. Findings revealed that the rats on the prebiotic diet spent more time in non-rapid-eye-movement (NREM) sleep, which is restful and restorative, than those on the non-prebiotic diet.


What type of sleep is restorative?

A) NREM B) REM
C) EEG D) ECG
 
Answer & Explanation Answer: A) NREM

Explanation:
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Q:

Which three parts of the computer receive input?

 

A) MICR, Barcode readers, Touch-screens B) Keyboard, ALU, Printers
C) Keyboard, Mouse, Printers D) Printers, MICR, Touch-screens
 
Answer & Explanation Answer: A) MICR, Barcode readers, Touch-screens

Explanation:

The main function of input devices is to direct commands and data into computers. Computers then use their CPU to process this data and produce output.

 

Examples of input devices - keyboards, mouse, barcode readers, Magnetic Ink Character Readers (MICR), Optical Character Readers (OCR), touch screens, etc...

 

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Q:

Pick the odd man out

1 4 16 64 126

A) 1 B) 4
C) 64 D) 126
 
Answer & Explanation Answer: D) 126

Explanation:

1*3+1=4

4*3+4=16

16*3+16=64

64*3+64=208 but it is given 126

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Q:

Read each sentence to find out whether there is any error in any part

The jug(a) is made(b) out of china clay(c).No error.(d)

A) a B) b
C) c D) d
 
Answer & Explanation Answer: C) c

Explanation:

‘Out of’ is the incorrect preposition used in the sentence. ‘Of’ needs to be used as the correct form of preposition is ‘made of something’. Thus, the correct sentence would be, ‘The jug is made of clay’.

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Filed Under: English
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