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Q:

What frequency range is the high frequency band?

A) 3 kHz	B) 3 to 30 MHz
C) 30 to 300 MHz	D) 10 GHz

Answer & Explanation Answer: B) 3 to 30 MHz

Explanation:

The HF band is based on frequencies 3 to 30 Mhz. AM radio stations are in the HF band but normally are stated in kilohertz.

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Filed Under: Physics
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Q:

Data integrity constraints are used to

A) Ensure that duplicate records are not entered into the table	B) Prevent users from changing the values stored in the table
C) Control who is allowed access to the data	D) Improve the quality of data entered for a specific property like table column

Answer & Explanation Answer: D) Improve the quality of data entered for a specific property like table column

Explanation:

Integrity constraints are used to ensure accuracy and consistency of data in a relational database. Data integrity is handled in a relational database through the concept of referential integrity. Many types of integrity constraints play a role in referential integrity (RI).

Hence, Data integrity constraints are used to Improve the quality of data entered for a specific property i.e, table column.

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Filed Under: Oracle Certification
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Q:

Name the body that has recently announced a plan to promote micro-enterprises in 115 aspirational districts across the country after tying up with Common Service Centre (CSC).

A) SEBI	B) RBI
C) SIDBI	D) IRDAI

Answer & Explanation Answer: C) SIDBI

Explanation:

Small Industries and Development Bank of India (SIDBI) announced a plan to promote micro-enterprises in 115 aspirational districts across the country. It has tied up with Common Service Centre (CSC).

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Filed Under: General Awareness
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Q:

Alone I am 24th, with a friend I am 20. Another friend and I am unclean. What am I?

Answer

The answer is 'X'.

1. It is the 24th letter in the alphabetical order.

2. XX (20 in Roman)

3. XXX is used to refer dirty.

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Subject: Logic Puzzles Exam Prep: AIEEE , Bank Exams , CAT , GATE , GRE , TOEFL
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Q:

Which of the following is a property of sodium hydroxide?

A) It is insoluble in ether and other Non-polar solvents	B) It is slowly soluble in water
C) It has an odor of rotten egg smell	D) All the above

Answer & Explanation Answer: A) It is insoluble in ether and other Non-polar solvents

Explanation:

Sodium hydroxide, also known as lye and caustic soda, is an inorganic compound with the formula NaOH. It is a white solid ionic compound consisting of sodium cations Na+ and hydroxide anions OH−.

Properties:

1. It is highly soluble in water, and readily absorbs moisture and carbon dioxide from the air.

2. NaOH is insoluble in ether and other non-polar solvents.

3. It is an odorless compound.

Uses:

Sodium hydroxide is used in many industries: in the manufacture of pulp and paper, textiles, drinking water, soaps and detergents, and as a drain cleaner.

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Filed Under: Chemistry
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Q:

Which stage of cellular respiration produces the most ATP?

A) Glycolysis	B) Kreb's cycle
C) Electron transport chain	D) All the above

Answer & Explanation Answer: C) Electron transport chain

Explanation:

There are 3 stages in cellular respiration. They are:

1. Glycolysis

2. Kreb's cycle

3. Electron transport chain

Here, Glycolysis produces only 2 ATP whereas Kreb's cycle produces no ATP. Electron transport chain of the cellular respiration produces the maximum ATP.

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Filed Under: Biology
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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 = $4^{n}, where n = 3$

$4^{3} = 64$

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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Q:

36 of what number is 18?

A) 38	B) 42
C) 50	D) 62

Answer & Explanation Answer: C) 50

Explanation:

Let the required number be 'p'

36 of what number is 18 implies 36% of p = 18

=> 36 x p/100 = 18

=> p = 1800/36

=> p = 50.

Hence, 36% of 50 is 18.

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Filed Under: Percentage
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