Questions

Q:

 In the relational model, relationships between relations or tables are created by using:

A) composite keys. B) determinants.
C) candidate keys. D) foreign keys.
 
Answer & Explanation Answer: D) foreign keys.

Explanation:
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Filed Under: Database

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Q:

The element that has the highest first ionization potential is.......

A) Oxygen B) Carbon
C) Boron D) Nitrogen
 
Answer & Explanation Answer: D) Nitrogen

Explanation:
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Filed Under: Chemistry

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Q:

In 1689, which chief of the Maratha Navy effectively controlled the Konkam trade from his headquarters at Kolaba?

Answer

Kanhoji Angre

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Q:

Which of the following is not a plantation crop?

A) rubber B) coffee
C) gram D) coconut
 
Answer & Explanation Answer: C) gram

Explanation:

Gram is not a Plantation crop among the given options.

 

Plantation crops are known as cash crops. These crops are mostly grown at tropical and subtropical areas. These crops are grown for sale but not for local consumption. such crops include rubber, coffee, tea, various oil seeds, sugar cane,etc.

So, Gram is not a plantation crop.

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Filed Under: Indian Geography
Exam Prep: AIEEE , Bank Exams , CAT
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Q:

Distance of stars are measured in

A) Galactic unit B) seller mile
C) Cosmic Kilometre D) Light year
 
Answer & Explanation Answer: D) Light year

Explanation:
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Filed Under: Physics

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Q:

The Legislature of the USA is known as the 

A) Commons B) Congress
C) Parliament D) Senate
 
Answer & Explanation Answer: B) Congress

Explanation:

The US Congress consists of two bodies 

a) the Senate and   b) the House of Representatives. The Senate, composed of 100 members (two Senators from each State), is a powerful body and exercises a very real influence in national affairs.

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Filed Under: Indian Politics

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Q:

Hot water is poured simultaneously in four metallic tumblers painted outside with different paints. After some time the water will be found to have cooled most in the tumbler painted.

A) rough white B) rough black
C) shining white D) shining black
 
Answer & Explanation Answer: B) rough black

Explanation:

Black surfaces are good emitters of heat. If the black surface is rough too, the emitting will be better. Shinning surfaces reflect black radiation . So if the black surface is also shining the effectiveness of emitting heat is lessened.

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Filed Under: Physics

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Q:

A polygenic trait is controlled by 3 genes A, B and C. In a cross AaBbCc x AaBbCc, the phenotypic ratio of the offsprings was observed as 1 : 6 : m : 20 : m : 6 : 1. What is the value of m?

A) 10 B) 15
C) 18 D) 24
 
Answer & Explanation Answer: B) 15

Explanation:

Here crossing is AaBbCc x AaBbCc

As it is trihybrid cross,

we know, Number of zygotes formed = 4n, where n = 3

43 = 64

Given ratio of offsprings = 1 : 6 : m : 20 : m : 6 : 1

Now,  1 + 6 + m + 20 + m + 6 + 1 = 64

34 + 2m = 64

2m = 30

=> m = 15.

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Filed Under: Biology
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