GATE Practice Question and Answer

Q: Mr. A, Miss B, Mr. C and Miss D are sitting around a table and discussing their trades. 1. Mr. A sits opposite to cook 2. Miss b sits right to the barber.3. The washer man is on the left of the tailor 4. Miss D sits opposite Mr. C What are the trades of A and B ? 2815 0

  • 1
    Tailor and Barber
    Correct
    Wrong
  • 2
    Tailor and cook
    Correct
    Wrong
  • 3
    Barber and cook
    Correct
    Wrong
  • 4
    washer man and cook
    Correct
    Wrong
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Answer : 2. "Tailor and cook"
Explanation :

Answer: B) Tailor and cook Explanation: Clealry, C and D sit opposite to each other. So, if A sits opposite to cook, B shall be the cook.Now, B is to the right of barber. So, one of the rest, say C will be barber.Clealry, then D on the opposite side shall be washerman or tailor. But, washerman is left of tailor and D on the left of A.So, D is washerman and A is tailor. Thus, A and B are Tailor and Cook.

Q: Which of the following equations represents Photosynthesis? 2810 0

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    6CO2 + 6H2O -----> C6H12O6 + 6O2
    Correct
    Wrong
  • 2
    C6H12O6 + 6O2 -----> CO2 + 6H2O
    Correct
    Wrong
  • 3
    CO2 + H2O -----> C6H12O6 + 6O2
    Correct
    Wrong
  • 4
    6O2 + 6H2O -----> C6H12O6 + 6CO2
    Correct
    Wrong
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Answer : 1. "6CO2 + 6H2O -----> C6H12O6 + 6O2"
Explanation :

Answer: A) 6CO2 + 6H2O -----> C6H12O6 + 6O2 Explanation: Photosynthesis is a process used by plants and other organisms to convert light energy into chemical energy that can later be released to fuel the organisms activities.   Photosynthesis can be represented using a chemical equation.   The overall balanced equation is                 6CO2 +  6H2O   →Sunlight    C6H12O6   +   6O2Source of Carbon & Oxygen  + Source of Electrons & Hydrogen + Energy that drives Photosynthesis             ----> Sugar + Gas produced by splitting water.   Where  CO2 = carbon dioxide  H2O = waterC6H12O6 = glucose  O2 = oxygen.

Q: A driver of auto rickshaw makes a profit of 20% on every trip when he carries 3 passengers and the price of petrol is Rs. 30 a litre. Find the % profit for the same journey if he goes for 4 passengers per trip and the price of petrol reduces to Rs. 24 litres ? 2809 0

  • 1
    68%
    Correct
    Wrong
  • 2
    80%
    Correct
    Wrong
  • 3
    75%
    Correct
    Wrong
  • 4
    100%
    Correct
    Wrong
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Answer : 4. "100%"
Explanation :

Answer: D) 100% Explanation: When 3 passengers income was 3xexpense= Rs.30 profit =20% of 30 = Rs.6 That means his earning is Rs.36. so that per passenger fare must be Rs.12. When 4 passengersearning = 12x4=Rs.48.expense =Rs.24.profit = Rs.24 = 100%

Q: The Length of the Day is determined in 2806 0

  • 1
    length of the hours
    Correct
    Wrong
  • 2
    length of the year
    Correct
    Wrong
  • 3
    astronomical units
    Correct
    Wrong
  • 4
    solar terms
    Correct
    Wrong
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Answer : 3. "astronomical units"
Explanation :

Answer: C) astronomical units Explanation: The Length of the Day is determined in Astronomical Units. The length of a day corresponds to the time the Earth takes to turn around on its axis, which is approximately 24 hours. But it's not exactly 24 hours.  This phenomenon is due to tides raised by the Moon which slow Earth's rotation. Because of the way the second is defined, the mean length of a day is now about 86 400.002 seconds, and is increasing by about 1.7 milliseconds per century.

Q: If the sides of a triangle are 26 cm, 24 cm and 10 cm, what is its area ? 2802 0

  • 1
    108 sq.cm
    Correct
    Wrong
  • 2
    112 sq.cm
    Correct
    Wrong
  • 3
    116 sq.cm
    Correct
    Wrong
  • 4
    120 sq.cm
    Correct
    Wrong
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Answer : 4. "120 sq.cm"
Explanation :

Answer: D) 120 sq.cm Explanation: The triangle with sides 26 cm, 24 cm and 10 cm is right angled, where the hypotenuse is 26 cm. Area of the triangle =1/2 x base x height => 1/2 x 24 x 10 = 120 sq.cm

Q: Given that on 9th August 2016 is Saturday. What was the day on 9th August 1616 ? 2801 0

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    Saturday
    Correct
    Wrong
  • 2
    Sunday
    Correct
    Wrong
  • 3
    Friday
    Correct
    Wrong
  • 4
    Monday
    Correct
    Wrong
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Answer : 1. "Saturday"
Explanation :

Answer: A) Saturday Explanation: We know that, After every 400 years, the same day occurs.Thus, if 9th August 2016 is Saturday, before 400 years i.e., on 9th August 1616 has to be Saturday.

Q: "Compounding frequency" refers to 2800 0

  • 1
    What type of interest your account earns
    Correct
    Wrong
  • 2
    How often your interest is calculated and added back into your account
    Correct
    Wrong
  • 3
    What interest rate you can expect from your account
    Correct
    Wrong
  • 4
    How easily you can add money into your account
    Correct
    Wrong
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Answer : 2. "How often your interest is calculated and added back into your account"
Explanation :

Answer: B) How often your interest is calculated and added back into your account Explanation: Compounding frequency : The time periods when interest will be calculated on top of the original loan amount (or) The number of compounding periods in one year.   The greater the compounding frequency, the more often your interest is calculated and added back into your account.

Q: 5% people of a village in India died by dengue, 15% of the remainder left the village on account of fear. If now the population is reduced to 3553, how much was it in the beginning ? 2797 0

  • 1
    4400
    Correct
    Wrong
  • 2
    3100
    Correct
    Wrong
  • 3
    2800
    Correct
    Wrong
  • 4
    5600
    Correct
    Wrong
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Answer : 1. "4400"
Explanation :

Answer: A) 4400 Explanation: Let 'P' be the original population at the beginning P x (95/100) x (85/100) = 3553 P = 4400.

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