GATE Practice Question and Answer

Q: If x = 2 + 223 + 213 then find the value of x3-6x2+6x ? 1502 0

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    1
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    2
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    3
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    4
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Answer : 2. "2"
Explanation :

Answer: B) 2 Explanation: Given that x = 2+ 223 + 213   So x - 2 = 223 + 213   Now cubing on both sides, we get     => x3-8-6x2+12x = 4 + 2 + 6(x-2)   Therefore, x3-6x2+6x = -6 + 8 = 2

Q: What is your ideal working environment ? 1500 0

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Answer :
Explanation :

The interviewer is attempting to assess how closely your ideal fits with the reality of their organisation. A positive work environment makes employees feel good about coming to work, and this provides the motivation to sustain them throughout the day. When you can find the ideal working environment that best suits your work ethics and personality, you will become more productive and lead a fulfilling life. - Before answering, take into account how their company is structured in terms of work days, formality, small start-up verses large corporation, etc.- Focus on wanting an environment that allows for the use and growth of your established skills and qualities.- Highlight your desire to work in a team-oriented workplace.- Talk about your work-style and that it blends in well with the company’s vision.

Q: If a 36 cm thread is used to wrap a book, lengthwise twice and breadth wise once, what is the size of the book ? 1500 0

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    288 sq.cm
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    188 sq.cm
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    144 sq.cm
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    244 sq.cm
    Correct
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Answer : 1. "288 sq.cm"
Explanation :

Answer: A) 288 sq.cm Explanation: Length of the thread is 36 cms. length wise twice breath wise once then totally thrice.so 36/3 = 12.so length is 12 x 2 = 24 cmsbreath is 12 cmsArea of the book = length x breath = 24 x 12 = 288 sq.cm

Q: What least number must be substracted from 627349 so that the remaining number is divisible by 15 ? 1498 0

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    1
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    2
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    3
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    4
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Answer : 4. "4"
Explanation :

Answer: D) 4 Explanation: On dividing 627349 by 15, we get remainder = 4.Therefore, the obtained remainder is the least number to be subtracted from the given number so that the the mnumber is divisible by 15.Here 4 is the least number to be subtracted from 627349 so that it is divisible by 15.

Q: Grey Revolution is associated with 1497 0

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    Cotton
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    Fruits
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    Fertilizers
    Correct
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    Oil seeds
    Correct
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Answer : 3. "Fertilizers"
Explanation :

Answer: C) Fertilizers Explanation: Grey Revolution is associated with Fertilizers.   Cotton - Silver fiber Revolution   Fruits - Golden Revolution   Oil seeds - Yellow Revolution

Q: Which of the following is a secondary air pollutant? 1496 0

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    Acid rain
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    SO2
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    CO2
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    Dust particles
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Answer : 1. "Acid rain"
Explanation :

Answer: A) Acid rain Explanation: Secondary pollutants include ozone, which is formed when hydrocarbons (HC) and nitrogen oxides (NOx) combine in the presence of sunlight.   Whereas Primary pollutant are those pollutants that are directly emitted from their sources, like CO2, CO, SO2 as these gases are directly emitted form burning of fossil fuels.   Acid rain, which is formed when sulfur dioxide or nitrogen oxides react with water, sulfuric acid etc.   Hence, Acidrain is a secondary air pollutant.

Q: At what temperature (in Fahrenheit) pure water freezes? 1496 0

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    0
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    17
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    32
    Correct
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    39
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Answer : 3. "32"
Explanation :

Answer: C) 32 Explanation: 32oFWe know that T(°F) = T(°C) × 1.8 + 3232(°F) = 0(°C)

Q: Ratio between heights of two cylinder in the ratio 3:5. Their volumes are in the ratio 27:80. Find ratio between their radius ? 1495 0

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    1:3
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    2:1
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    3:4
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    4:7
    Correct
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Answer : 3. "3:4"
Explanation :

Answer: C) 3:4 Explanation:

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