GATE Practice Question and Answer

Q: A bag contains 3 red balls, 5 yellow balls and 7 pink balls. If one ball is drawn at random from the bag, what is the probability that it is either pink or red? 1785 0

  • 1
    2/3
    Correct
    Wrong
  • 2
    1/8
    Correct
    Wrong
  • 3
    3/8
    Correct
    Wrong
  • 4
    3/4
    Correct
    Wrong
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Answer : 1. "2/3"
Explanation :

Answer: A) 2/3 Explanation: Given number of balls = 3 + 5 + 7 = 15 One ball is drawn randomly = 15C1 probability that it is either pink or red = 7C1 + 3C115C1 = 7 + 315 = 1015 = 23

Q: A jogger running at 9 kmph alongside a railway track is 240 metres ahead of the engine of a 120 metre long train running at 45 kmph in the same direction. In how much time will the train pass the jogger  ? 1784 0

  • 1
    10 sec
    Correct
    Wrong
  • 2
    48 sec
    Correct
    Wrong
  • 3
    36 sec
    Correct
    Wrong
  • 4
    56 sec
    Correct
    Wrong
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Answer : 3. "36 sec"
Explanation :

Answer: C) 36 sec Explanation: Given speed of jogger = 9 kmph Speed of train = 45 kmphAs they are in same direction, Relative speed = 45 - 9 = 36 kmph = 36x5/18 = 10 m/sDistance = 240 + 120 = 360 mts Time = distance/speed = 360/10 = 36 sec.

Q: Translator program used in assembly language 1784 0

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    Assembler
    Correct
    Wrong
  • 2
    Interpreter
    Correct
    Wrong
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    Compiler
    Correct
    Wrong
  • 4
    Operating system
    Correct
    Wrong
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Answer : 1. "Assembler"
Explanation :

Answer: A) Assembler Explanation: Assemblers are used to translate a program written in a low-level assembly language into a machine code (object code) file so it can be used and executed by the computer.   Hence, Assembler is the translator program used in assembly language.

Q: Water is an excellent solvent because 1783 0

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Answer :
Explanation :

Water is capable of dissolving a variety of different substances, which is why it is such a good solvent. And, water is called the "universal solvent" because it dissolves more substances than any other liquid It means that wherever water goes, either through the ground or through our bodies, it takes along valuable chemicals, minerals, and nutrients

Q: Which of the following chemical compounds has the highest boiling point? 1783 0

  • 1
    Dimethyl ether (CH3OCH3)
    Correct
    Wrong
  • 2
    Methanol (CH3OH)
    Correct
    Wrong
  • 3
    Methane (CH4)
    Correct
    Wrong
  • 4
    None
    Correct
    Wrong
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Answer : 2. "Methanol (CH3OH)"
Explanation :

Answer: B) Methanol (CH3OH) Explanation: Chemical Compounds with stronger intermolecular forces have higher boiling points.   The order of strengths of intermolecular forces is:  London dispersion < dipole-dipole < H-bonding   Methane (CH4) — London dispersion forces Dimethyl ether (CH3OCH3) — dipole-dipole attractions Methanol (CH3OH) — hydrogen bonding Therefore, Methanol - CH3OH with H-Bonding have highest Boiling Point among the given chemical compounds.

Q: Agha khan cup is associated with 1782 0

  • 1
    Football
    Correct
    Wrong
  • 2
    Tennis
    Correct
    Wrong
  • 3
    Cricket
    Correct
    Wrong
  • 4
    Hockey
    Correct
    Wrong
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Answer : 4. "Hockey"
Explanation :

Answer: D) Hockey Explanation:

Q: Guess the Hiding Letter  ? 1781 0

  • 1
    D
    Correct
    Wrong
  • 2
    K
    Correct
    Wrong
  • 3
    L
    Correct
    Wrong
  • 4
    G
    Correct
    Wrong
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Answer : 4. "G"
Explanation :

Answer: D) G Explanation: Starting from letter 'S' add 5 in the clock wise direction to get the next letter in English alphabets. Here S + 5 => 19 + 5 = 24 => X X + 5 = 24 + 5 = 3 => C Similarly,  B + 5 = G

Q: If the price of diesel increases by 25% and Karthik intends to spend only an additional 15% on diesel, by how much % will he reduce the quantity of diesel purchased ? 1781 0

  • 1
    6.67 %
    Correct
    Wrong
  • 2
    8 %
    Correct
    Wrong
  • 3
    7.41 %
    Correct
    Wrong
  • 4
    9 %
    Correct
    Wrong
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Answer : 2. "8 %"
Explanation :

Answer: B) 8 % Explanation: Let the price of 1 litre of diesel be Rs.x and let Karthik initially buy 'y' litres of diesel. Therefore, he would have spent Rs. xy on diesel. When the price of diesel increases by 25%, the new price per litre of diesel is 1.25x. Karthik intends to increase the amount he spends on diesel by 15%.i.e., he is willing to spend xy + 15% of xy = 1.15xy Let the new quantity of diesel that he can get be 'q'.Then, 1.25x x q = 1.15xyOr q = (1.15/1.25)y = 0.92y. As the new quantity that he can buy is 0.92y, he gets 0.08y lesser than what he used to get earlier. Or a reduction of 8%.

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