GATE Practice Question and Answer

Q: What has 4 Eyes But cannot see? 1439 0

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Answer :
Explanation :

What has 4 Eyes But cannot see is Mississippi. The wording of Mississippi has 4 'i''s. But it can't see.

Q: How many Earth- sized Exoplanets have been discovered by NASA around a single star in February 2017 ? 1437 0

  • 1
    14
    Correct
    Wrong
  • 2
    7
    Correct
    Wrong
  • 3
    6
    Correct
    Wrong
  • 4
    11
    Correct
    Wrong
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Answer : 2. "7"
Explanation :

Answer: B) 7 Explanation: NASA announced a Seven new system of Exoplanets, which are Earth-size, and could potentially hold life.These exoplanets are located outside of our solar system and orbit a star. NASA has named the system of planets after the ‘Transiting Planets and Planetesimals Small Telescope,’ which is located in Chile. This telescope first discovered three of the planets in this system in May 2016. Unlike Earth, which rotates on its axis, the planets are “tidally locked to the star.” This means that one side of the planet has only day, and one side has only night. It also means the weather conditions are unlike what we experience on Earth.

Q: A can do a work in 9 days, B can do a work in 7 days, C can do a work in 5 days. A works on the first day, B works on the second day and C on the third day respectively that is they work on alternate days. When will they finish the work ? 1432 0

  • 1
    [7 + (215/345)] days
    Correct
    Wrong
  • 2
    [6 + (11/215)] days
    Correct
    Wrong
  • 3
    [6 + (261/315)] days
    Correct
    Wrong
  • 4
    [5 + (112/351)] days
    Correct
    Wrong
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Answer : 3. "[6 + (261/315)] days"
Explanation :

Answer: C) [6 + (261/315)] days Explanation: After day 1, A finishes 1/9 of the work. After day 2, B finishes 1/7 more of the total work. (1/9) + (1/7) is finished. After day 3, C finishes 1/5 more of total work. Total finished is 143/315. So, after day 6, total work finished is 286/315.   Now remaining work =  29 /315   On day 7, A will work again    Work will be completed on day 7 when A is working. He must finish 29/315 of total remaining work.   Since he takes 9 days to finish the total task, he will need 261/315 of the day.    Total days required is 6 + (261/315) days.

Q: Which of the following is a false statement? 1431 0

  • 1
    As bond order increases the strength of the bond increases
    Correct
    Wrong
  • 2
    Bond order is proportional to the bond length
    Correct
    Wrong
  • 3
    Molecules with negative bond order are highly unstable
    Correct
    Wrong
  • 4
    Bond order is inversely proportional to the bond length
    Correct
    Wrong
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Answer : 2. "Bond order is proportional to the bond length"
Explanation :

Answer: B) Bond order is proportional to the bond length Explanation: Bond order is proportional to the bond length is a False statement since Bond order is inversely proportional to the bond length.

Q: 4 men and 6 women can complete a work in 8 days, while 3 men and 7 women can complete it in 10 days. In how many days will 10 women complete it ? 1431 0

  • 1
    40 days
    Correct
    Wrong
  • 2
    36 days
    Correct
    Wrong
  • 3
    32 days
    Correct
    Wrong
  • 4
    34 days
    Correct
    Wrong
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Answer : 1. "40 days"
Explanation :

Answer: A) 40 days Explanation: Let 1 man's 1 day work = x and 1 woman's 1 day work = y.Then, 4x + 6y = 1/8 and 3x + 7y = 1/10Solving these two equations, we get:x = 11/400 and y = 1/40010 woman's 1 day work = (1/400 x 10) = 1/40. Hence, 10 women will complete the work in 40 days.

Q: _____ ties-up with Airtel to roll out integrated digital offerings to customers in 2017 ? 1431 0

  • 1
    Uber cabs
    Correct
    Wrong
  • 2
    Ola cabs
    Correct
    Wrong
  • 3
    Cabs 24
    Correct
    Wrong
  • 4
    Dot cabs
    Correct
    Wrong
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Answer : 2. "Ola cabs"
Explanation :

Answer: B) Ola cabs Explanation: India's largest cab aggregator Ola has partnered with Bharti Airtel to launch a range of integrated digital offerings to customers.  As part of the partnership, Ola will integrate Airtel Payments bank to its app and Airtel will integrate Ola's mobile wallet Ola Money as a payment solution on Airtel website and MyAirtel app for mobile recharges and bill payments.

Q: In how many different ways could couples be picked from 6 men and 9 women ? 1429 0

  • 1
    26
    Correct
    Wrong
  • 2
    54
    Correct
    Wrong
  • 3
    52
    Correct
    Wrong
  • 4
    28
    Correct
    Wrong
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Answer : 2. "54"
Explanation :

Answer: B) 54 Explanation: Number of mens = 8 Number of womens = 5   Different ways could couples be picked = C16× 9C1 = 9 x 6 = 54 ways.

Q: You will always find me in the past. I can be created in the present, But the future can never taint me. What am I? 1428 0

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Answer :
Explanation :

I am History.   Yes, history refers to all the past, but we can create history in the presentand it cannot be polluted in the future.

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