Practice Question and Answer
8Q: A take twice as much time as B or thrice as much time to finish a piece of work. Working together, they can finish the work in 2 days. B can do the work alone in ? 2010 05b5cc6dbe4d2b4197774e927
5b5cc6dbe4d2b4197774e927- 18 hrsfalse
- 212 hrsfalse
- 36 hrstrue
- 44 hrsfalse
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Answer : 3. "6 hrs"
Explanation :
Answer: C) 6 hrs Explanation: Suppose A, B and C take x, x/2 and x/3 respectively to finish the work. Then, (1/x + 2/x + 3/x) = 1/2 => 6/x = 1/2 => x = 12 So, B takes 6 hours to finish the work.
Q: What is the difference between creating String as new() and literal ? 2010 05b5cc6dee4d2b4197774ea50
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Answer :
Explanation :
When we create string with new() Operator, it’s created in heap and not added into string pool while String created using literal are created in String pool itself which exists in PermGen area of heap. String s = new String("Test"); does not put the object in String pool , we need to call String.intern() method which is used to put them into String pool explicitly. its only when you create String object as String literal e.g. String s = "Test" Java automatically put that into String pool.
Q: 3rd Defence Attaches Conference was organized in which place?
2010 05e3bcd650480fb5981979289
5e3bcd650480fb5981979289- 1Gurugramfalse
- 2New Delhitrue
- 3Punefalse
- 4Ranchifalse
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Answer : 2. "New Delhi"
Q: Find the simple interest on Rs.600 for 11 months at 5 paisa per month ? 2010 05b5cc6e3e4d2b4197774ec93
5b5cc6e3e4d2b4197774ec93- 1Rs. 30false
- 2Rs. 3.30true
- 3Rs. 33false
- 4Rs. 330false
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Answer : 2. "Rs. 3.30"
Explanation :
Answer: B) Rs. 3.30 Explanation: I = (600x11x5)/100 = 330 Paise = Rs. 3.30
Q: Ozone is present in which of the following layers ? 2010 05c330a5ea3a98b0345a7b150
5c330a5ea3a98b0345a7b150- 1Mesospherefalse
- 2Stratospheretrue
- 3Mesospherefalse
- 4Thermospherefalse
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Answer : 2. "Stratosphere"
Q: The biological action in which Oxygen is free?
2010 05e5793eb2ec0ee6eac128cf6
5e5793eb2ec0ee6eac128cf6- 1Photosynthesistrue
- 2Respiration and excretionfalse
- 3Respirationfalse
- 4Respiration and photosynthesisfalse
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Answer : 1. "Photosynthesis "
Q: One Joule is equal to
2010 05edf02e78c4c964f73d3ad22
5edf02e78c4c964f73d3ad22- 1$$ {10^11}erg$$false
- 2$$ {10^5}erg$$false
- 3$$ {10^3}erg$$false
- 4$$ {10^7}erg$$true
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Answer : 4. "$$ {10^7}erg$$"
Q: Name the cyclone which hit southern Africa recently? 2010 05d048dfa258ef748c26de211
5d048dfa258ef748c26de211- 1Cyclone Phailinfalse
- 2Cyclone Idaitrue
- 3Cyclone Hudhudfalse
- 4Cyclone Nilofarfalse
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