GATE Practice Question and Answer

Q: A man can row 8 kmh in still water. If the river is running at 2 kmh, it takes 4 hrs more upstream than to go downstream for the same distance. Then the distance is given by 1311 0

  • 1
    54 kms
    Correct
    Wrong
  • 2
    32 kms
    Correct
    Wrong
  • 3
    45 kms
    Correct
    Wrong
  • 4
    60 kms
    Correct
    Wrong
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Answer : 4. "60 kms"
Explanation :

Answer: D) 60 kms Explanation: Let the distance be d.  d8-2-d8+2 = 4   => 2d = 120    => d = 60 kms.

Q: What is 16 bit? 1310 0

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Answer :
Explanation :

Anything larger and the computer would need to break the number into smaller pieces.   16-bit is a computer hardware device or software program capable of transferring 16 bits of data at a time. Today, 16-bit hardware and software has been replaced by 32-bit and 64-bit alternatives, which give the computer more memory to work with; increasing overall performance.   For example, early computer processors (e.g., 8088 and 80286) were 16-bit processors, meaning they were capable of working with 16-bit binary numbers (decimal number up to 65,535).

Q: Which results from an increase in the greenhouse effect? 1309 0

  • 1
    Ocean acidification
    Correct
    Wrong
  • 2
    Smog pollution
    Correct
    Wrong
  • 3
    Ozone depletion
    Correct
    Wrong
  • 4
    All the above
    Correct
    Wrong
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Answer : 4. "All the above"
Explanation :

Answer: D) All the above Explanation: A greenhouse gas (GHG) is any gas in the atmosphere that absorbs and emits radiation in the thermal infrared range.   The increase in average global temperatures that results from an enhanced greenhouse effect. Effects of increased greenhouse gas emissions: Increases in the different greenhouse gases have other effects apart from global warming including ocean acidification, smog pollution, ozone depletion as well as changes to plant growth and nutrition levels.

Q: GST Council has decided to keep a total of ________ items in the 28% slab, which was earlier 227. 1307 0

  • 1
    125
    Correct
    Wrong
  • 2
    87
    Correct
    Wrong
  • 3
    100
    Correct
    Wrong
  • 4
    50
    Correct
    Wrong
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Answer : 4. "50"
Explanation :

Answer: D) 50 Explanation: The GST Council on Nov 10th 2017 cut tax rates of over 175 products that were in the highest tax slab of 28% under the Goods and Services Tax (GST) regime.   Currently only 50 items have been left in the 28% category out of a total of 227 items that were present earlier.

Q: Which results in an increase in power? 1305 0

  • 1
    doing more work in less time.
    Correct
    Wrong
  • 2
    doing less work in more time.
    Correct
    Wrong
  • 3
    doing less work in less time.
    Correct
    Wrong
  • 4
    doing more work in more time.
    Correct
    Wrong
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Answer : 1. "doing more work in less time."
Explanation :

Answer: A) doing more work in less time. Explanation: Doing more work in less time, results in an increase in power to do a work.

Q: 19 friends went to a restaurant for a combined weekend dinner party. 13 of them spent Rs. 79 each on their dinner and the rest spent Rs. 4 more than the average expenditure of all the 19. What was the total money spent by them? 1296 0

  • 1
    Rs. 1398.96
    Correct
    Wrong
  • 2
    Rs. 1457.09
    Correct
    Wrong
  • 3
    Rs. 1662.35
    Correct
    Wrong
  • 4
    Rs. 1536.07
    Correct
    Wrong
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Answer : 4. "Rs. 1536.07"
Explanation :

Answer: D) Rs. 1536.07 Explanation: Let average expenditure was Rs. R 13 x 79 + 6x(R + 4) = 19R => R = Rs. 80.84 Total money = 19 x 80.84 = Rs. 1536.07.

Q: Find the area of the square whose side is equal to the diagonal of a rectangle of length 3 cm and breadth 4 cm. 1268 0

  • 1
    25 sq.cm
    Correct
    Wrong
  • 2
    16 sq.cm
    Correct
    Wrong
  • 3
    9 sq.cm
    Correct
    Wrong
  • 4
    4 sq.cm
    Correct
    Wrong
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Answer : 1. "25 sq.cm"
Explanation :

Answer: A) 25 sq.cm Explanation: Given length of the rectangle = 3 cm Breadth of the rectangle = 4 cm Then, the diagonal of the rectangle D = 32 + 42 = 25 = 5 Then, it implies side of square = 5 cm We know that Area of square = S x S = 5 x 5 = 25 sq.cm.

Q: A man has only 20-paise and 25-paise coins in a bag. If he has 50 coins in all totaling to Rs.10.25, then the number of 20-paise coins is 1264 0

  • 1
    42
    Correct
    Wrong
  • 2
    45
    Correct
    Wrong
  • 3
    38
    Correct
    Wrong
  • 4
    36
    Correct
    Wrong
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Answer : 2. "45"
Explanation :

Answer: B) 45 Explanation: Let number of 20 ps coins = x and number of 25 ps coins = y Given total coins in the bag = 50 x + y = 50.......(1) But the total money in the bag = Rs. 10.25 0.20x + 0.25y = 10.25 20x + 25y = 1025.........(2) Now multiplying (1) by 25 we get 25x+25y=1250.............(3) By solving (2) and (3) 20x + 25y = 1025; => x = 45; Then, the no. of 20 ps coins are 45.

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