Questions

Q:

Which country won the Cricket World cup in 2011

A) Sri Lanka B) Australia
C) Pakistan D) India
 
Answer & Explanation Answer: D) India

Explanation:
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Q:

Answer the following Program

#define CHARSIZE 8

#define MASK(y) (1 << y % CHARSIZE)

#define BITSLOT (y) (y / CHARSIZE)

#define SET(x,y) ( x[BITSLOT(y)] = MASK(y) )

#define TEST(x,y) ( x[BITSLOT(y)] & MASK(y) )

#define NUMSLOTS(n) ((n + CHARSIZE - 1) / CHARSIZE)

 

Give the above macros how would you

1. declare an array arr of 50 bits

2. put the 20th bit on

3. test whether the 40th bit is on or off

Answer

1. char arr[NUMSLOTS(50)];


2. SET (arr, 20);


3. if (TEST (arr, 40))

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Subject: Programming

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Q:

Project Life Cycle - Characteristic of Project Phases

What is a deliverable?

Answer

A deliverable is a measurable, verifiable work product such as a specification, feasibility study report, detailed design document, or working prototype.

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Q:

Which of the following is an air pollutant?

A) Sulphur dioxide B) Ozone
C) Water vapour D) Nitric oxide
 
Answer & Explanation Answer: A) Sulphur dioxide

Explanation:

Air pollutants are solid particles, gases, and liquid droplets in the air that can adversely affect ecosystems and the health of humans.

 

Major ambient air pollutants include toxic metals, polycyclic aromatic hydrocarbons, benzene, particulate matter (PM), nitrogen oxides, sulfur oxides, carbon monoxide, and ozone. Power plants, factories, and vehicle and air traffic are the most important anthropogenic sources of air pollution.

 

In addition, natural sources such as wildfires and volcanic activity contribute to ambient air pollution.

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Filed Under: General Science
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Q:

What was one outcome of laissez faire economic policies?

A) Poverty traps that cannot be escaped through free choice B) Monopoly power that emerges naturally in the market and allows businesses to exploit consumers
C) Businesses pay workers low D) All of the above
 
Answer & Explanation Answer: D) All of the above

Explanation:

Laissez-faire is simply a way to describe a government's hands-off approach to economic policies. This approach was particularly prevalent in the United States at the turn of the 20th century, which led to numerous issues within American manufacturing.

 

There are many outcomes of laissez-faire economic policies. Some of the outcomes of laissez-faire economics were:

* Businesses pay workers low.

* Pollution of air and water.

* Poverty traps that cannot be escaped through free choice. 

* General glut that results from overproduction or underconsumption

* Monopoly power that emerges naturally in the market and allows businesses to exploit consumers. 

* Exploitation of the working class that pushes wages down to subsistence and compels laborers to work in harsh and unsafe conditions. 

* External economies that generate situations where desirable goods are underproduced on the market, and undesirable goods are overproduced on the market. 

* Public goods that are not supplied by the market due to free-rider problems.

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Q:

Which of the following reactions are redox reactions?

A) Ba(s)+Cl2(g)--->BaCl2(s) B) Mg(s)+Br2(l)--->MgBr2(s)
C) Al(s)+3Ag^+(aq)--->Al^3+(aq)+3Ag(s) D) All of the above
 
Answer & Explanation Answer: D) All of the above

Explanation:

A redox reaction is a type of reaction which involves transfer of electrons among two species. This reaction is also called oxidation-reduction reaction.

In oxidation process, there is an increase in oxidation state of an atom, ion or molecule by losing the electrons.

In reduction process, there is a decrease in oxidation state of an atom, ion or molecule by accepting the electrons.

1)

image

In this reaction, Ba undergoes oxidation and Cl undergoes reduction.
This reaction is redox reaction.
In this reaction, oxidation number of Ba increases from 0 to +2 . So, Ba undergoes oxidation. The oxidation number of Cl decreases from 0 to -1. So, Cl undergoes reduction.

 

2) 

 

image

From this above reaction, it is clear that Aluminum undergoes oxidation and silver undergoes reduction.
Due to this, this reaction is redox reaction.

In this reaction, oxidation number of Aluminum increases from 0 to +1. So, aluminum undergoes oxidation. The oxidation number of silver decreases from +1 to 0. So, silver undergoes reduction.

 

3)


image

In this reaction, Mg undergoes oxidation and Br undergoes reduction.
This reaction is redox reaction.
The reactions 1, 3 and 4 are redox reactions.
In this reaction, oxidation number of Mg increases from 0 to +2 . So, Mg undergoes oxidation. The oxidation number of Br decreases from 0 to -1 . So, Br undergoes reduction.

 

Hence all the above reactions are redox reactions.

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Filed Under: Chemistry
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Q:

Which one of the following is true of tRNAs?

A) tRNAs are double-stranded. B) There are four types of tRNA.
C) Each tRNA binds a particular amino acid. D) All of the above
 
Answer & Explanation Answer: C) Each tRNA binds a particular amino acid.

Explanation:

tRNA abbreviated as A transfer RNA is an adaptor molecule composed of RNA, typically 76 to 90 nucleotides in length, that serves as the physical link between the mRNA and the amino acid sequence of proteins.

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Filed Under: Biology
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Q:

If there is a lock on an adjacent key, an insert will fail if the isolation level is set to what?

A) committed read B) repeatable read
C) share read D) indexed read
 
Answer & Explanation Answer: B) repeatable read

Explanation:
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