GATE Practice Question and Answer

Q: What Asks But Never Answers? 1680 0

  • 1
    Teacher
    Correct
    Wrong
  • 2
    Telephone
    Correct
    Wrong
  • 3
    Letter
    Correct
    Wrong
  • 4
    Owl
    Correct
    Wrong
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Answer : 4. "Owl"
Explanation :

Answer: D) Owl Explanation: An owl. "What noise does an owl make? The sound an Owl makes, it sounds like, "Who?" to our ears. They sounds entire lives asking the same question, but they'll never give any answers.

Q: What percent is 120 of 85 ? 1679 0

  • 1
    133.33 %
    Correct
    Wrong
  • 2
    141.17 %
    Correct
    Wrong
  • 3
    145.54 %
    Correct
    Wrong
  • 4
    139.29 %
    Correct
    Wrong
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Answer : 2. "141.17 %"
Explanation :

Answer: B) 141.17 % Explanation: Px85100=120   => p = 12000/85 = 141.17 %

Q: A shopkeeper sold a mobile phone for Rs. 12000. Had he offered discount of 10% on the selling price, there would be a loss of 4%. What is the cost price of that Mobile phone? 1679 0

  • 1
    Rs. 12,500
    Correct
    Wrong
  • 2
    Rs. 11,250
    Correct
    Wrong
  • 3
    Rs. 12,750
    Correct
    Wrong
  • 4
    Rs. 11,680
    Correct
    Wrong
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Answer : 2. "Rs. 11,250"
Explanation :

Answer: B) Rs. 11,250 Explanation: Given that SP = Rs. 12000 - 10%  = Rs. 10,800 Loss% = 4 We know that, C.P = 100/(100 - Loss%) x 100 => 100/100-4 x 10800 => 1080000/96 C.P = Rs. 11,250

Q: The purest form of iron is 1678 0

  • 1
    wrought iron
    Correct
    Wrong
  • 2
    steel
    Correct
    Wrong
  • 3
    pig iron
    Correct
    Wrong
  • 4
    nickel steel
    Correct
    Wrong
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Answer : 1. "wrought iron"
Explanation :

Answer: A) wrought iron Explanation: Wrought Iron is the purest form of iron. It contains 0.12 to 0.25% carbon and so it is the purest form of iron.

Q: Choose what replaces '?' in the following figure ? 1678 0

  • 1
    Q
    Correct
    Wrong
  • 2
    O
    Correct
    Wrong
  • 3
    M
    Correct
    Wrong
  • 4
    N
    Correct
    Wrong
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Answer : 4. "N"
Explanation :

Answer: D) N Explanation: The alphabetical value of the letters in the left hand column follows through the sequence of Prime Numbers, with the letters in the right hand column representing the corresponding reverse alphabetical values. So, M = Reverse of M = N.

Q: Laxmi and Prasanna set on a journey. Laxmi moves northwards at a speed of 20kmph and Prasanna moves southward at a speed of 30 kmph. How far will be Prasanna from Laxmi after 60 minutes ? 1677 0

  • 1
    24 km
    Correct
    Wrong
  • 2
    50 km
    Correct
    Wrong
  • 3
    42 km
    Correct
    Wrong
  • 4
    30 km
    Correct
    Wrong
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Answer : 2. "50 km"
Explanation :

Answer: B) 50 km Explanation: We know 60 min = 1 hrTotal northward Laxmi's distance = 20kmph x 1hr = 20 kmTotal southward Prasanna's distance = 30kmph x 1hr = 30 kmTotal distance between Prasanna and Laxmi is = 20 + 30 = 50 km.

Q: Let K and L be events on the same sample space, with P (K) = 0.8 and P (B) = 0.6. Are these two events are disjoint ? 1676 0

  • 1
    B) = 0.6. Are these two events are disjoint ? A)
    Correct
    Wrong
  • 2
    = 0.6. Are these two events are disjoint ? A) TRUE B) FALSE Answer & Explanation Answer: B) FALSE Explanation: These two events cannot be disjoint because P(K) + P(L) > 1. P(AꓴB) = P(
    Correct
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Answer : 2. "= 0.6. Are these two events are disjoint ? A) TRUE B) FALSE Answer & Explanation Answer: B) FALSE Explanation: These two events cannot be disjoint because P(K) + P(L) > 1. P(AꓴB) = P("
Explanation :

Answer: B) FALSE Explanation: These two events cannot be disjoint because P(K) + P(L) > 1. P(AꓴB) = P(A) + P(B) - P(AꓵB). An event is disjoint if P(A ꓵ B) = 0. If K and L are disjoint P(K ꓴ L) = 0.8 + 0.6 = 1.4 And Since probability cannot be greater than 1, these two mentioned events cannot be disjoint.

Q: In which layer is the temperature the lowest? 1675 0

  • 1
    Troposphere
    Correct
    Wrong
  • 2
    Ionosphere
    Correct
    Wrong
  • 3
    Mesosphere
    Correct
    Wrong
  • 4
    Stratosphere
    Correct
    Wrong
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Answer : 3. "Mesosphere"
Explanation :

Answer: C) Mesosphere Explanation: The mesosphere lies above the stratosphere and extends to an altitude of about 85 km. This is layer is often referred to as the cold layer, as the lowest readings in the atmosphere are found here.   Temperature decreases with height, reaching a minimum average value of -90 ºC at the top of the layer.

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