Objections to answer Key provided by ISRO-(DEC_2017)

Question

Comment Question number and explanation or any link that support you reasoning.
official Answer key : https://www.isro.gov.in/sites/default/files/comp.sci_.answerkeys.pdf

QP: https://gateoverflow.in/?qa=blob&qa_blobid=17141428060684308734

Comments

https://gateoverflow.in/182098/isro-dec2017-48 : Quick Sort ANswer should be B
https://gateoverflow.in/182120/isro-dec2017-70: Semaphore  : C

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https://gateoverflow.in/977/gate2006-16-isro-dec2017-27  ans should be B . 

https://gateoverflow.in/1487/gate1999-2-9 2*1 is also correct 

https://gateoverflow.in/182068/isro-dec2017-18  ans should be 2^n . for their ans in equation -1 is also there

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All 5 given above needs correction for sure.

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Qno 43 of set-A. Shouldn't the answer be d). The given key is c)

https://gateoverflow.in/2123/gate2011_21

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https://gateoverflow.in/182058/isro-dec2017-8 answer should be b) but given is d).

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Do they give new keys when they make these many mistakes  ??

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In their last exam, they cancelled all  questions having wrong keys. They marked upon 231 instead of 240 since 3 of the questions had wrong keys.

Qno 23 of set A has all wrong options. Ans would  be d) but printing mistake is there so it should also be considered as wrong. right?

So till now, we can report for all the below questions:

48, 70, 27, 18, 43, 8, 23

right??

Please add, if any question is left out

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What about set A question no. 9?

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yes 9 th is one one not onto

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Set A ques 72)          Set B ques 36).     Set C 55)              Set D ques 22)       Set E ques 9)

They have wrongly copied options of this previous year gate question question(there is problem in copying option B)

Original question:-

https://gateoverflow.in/1815/gate2006-39

 

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Shows the quality of the company. They cannot even do their recruitment process properly. Its not all rainbows and roses once u get into ISRO as well afaik.

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@sid1221, Qno 76 of set-A in this question they have explicitly mentioned external 1 in option b) which was not mentioned in gate question https://gateoverflow.in/1487/gate1999-2-9 . So option b) becomes more obvious than option c) because in option c) external 0 & 1 are needed. I think ISRO key is correct. option b) is more appropriate than c).

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Set A, Q 9: No, the answer is correct (option B - surjective but not injective). Refer:

https://books.google.co.in/books?id=_RAwDwAAQBAJ&pg=PA32&lpg=PA32&dq=the+function+f:%5B0,3%5D+-%3E+%5B1,29%5D+defined&source=bl&ots=2g8axUMuzW&sig=EZzVx5E7L-uP6rXmRZaLUXc4Lig&hl=en&sa=X&ved=0ahUKEwjz48Puw5rYAhXJsI8KHYgED3YQ6AEISTAF#v=onepage&q&f=false

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Q. 72 Overflow condition. previous GATE question but no option is correct

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Please report before 4 pm tomorrow. I've already reported the ones which I attempted but answer key given is wrong.

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yes 9th correct my mistake

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Why Not Option C in Que 2 of Set A ?

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@anup Patel

Actually it is not reflexive
as 0D0 is undefined.

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Qus no. 15, answer should be C
it is in BCNF too :(

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Abbas2131 then which option is correct
Not Reflexive
Antisymmetric
Transitive

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Yes, The relation is : not reflexive, Antisymmetric, Transitive.

 

I don't understand how they have given Not antisymmetric, because the definition states that If aRb and bRa then a=b, which i guess should be true for this relation