ABCDEFGHIJKLMNOPQRSTUVWXYZ
1
Question LinkSubjectConcept TestedReason For FailureRemarks
2
https://gateoverflow.in/333232/GATE2020-CS-GA-9Numerical AptitudeCoordinate GeometrySecond-guessing answerI unselected the answer after I had selected 90 degrees because I was unable to visualize. The correct answer came to my mind after the exam. Exam panic.
3
https://gateoverflow.in/333235/GATE2020-CS-GA-6Verbal AptitudeComprehension and InferenceOverthinking?
I am still not sure if GO answer is correct. I selected "GST is imposed on production of goods" which is closest to "supply". "Destination-based" does not directly imply "at point of usage" - point of usage would mean at point of sale, because that's where the goods are actually "used". Destination could be the seller.
4
https://gateoverflow.in/333206/GATE2020-CS-25Computer NetworksApplication-Layer ProtocolsSecond-guessing answerI had initially written 6 but thought that the question is a trick. There wasn't any trick and I paid the price.
5
https://gateoverflow.in/333228/GATE2020-CS-3Computer OrganizationInterruptsSilly mistakePolling is obviously when CPU checks status bits periodically. It's clear as day, yet somehow I was blind during the exam.
6
https://gateoverflow.in/333220/GATE2020-CS-11Operating SystemsMemory ManagementSilly mistakeObviously best fit's hole is the smallest of the lot, that's why it is best fit. Again, I was blind during exam. Probably because I was trying to move fast. (exam panic)
7
https://gateoverflow.in/333209/GATE2020-CS-22C ProgrammingPointers + Arrays + OutputConceptual weaknessI had particular weakness with multidimensional arrays and pointer-to-pointers.
8
https://gateoverflow.in/333210/GATE2020-CS-21Computer OrganizationCache MemorySilly mistakeMiscalculated somewhere in the answer. Question is pretty easy.
9
https://gateoverflow.in/333177/GATE2020-CS-54DatabasesB+trees and indexingDid not attemptDue to lack of time and being unable to remember the concept. This is a question straight out of Navathe, I had not practiced it (had practiced B+tree operations and multilevel indexing very well but missed out on this.
10
https://gateoverflow.in/333187/GATE2020-CS-44Computer OrganizationInstruction Formats and AddressingConceptual weaknessAttempted the numerical as if it was an expanding opcode numerical. Obviously it is not, I mixed up concepts in time limit.
11
https://gateoverflow.in/333190/GATE2020-CS-41AlgorithmsBinary Search Trees
Conceptual weakness but unknown algorithm
I don't think I could have gotten this right anyway. Maybe should not have selected the option because I was unsure. Atleast would not get negative marking.
12
https://gateoverflow.in/333191/GATE2020-CS-40Graph TheoryMinimum Spanning TreesDid not attemptHad practiced a lot of MST questions but not sure if this one was doable keeping the time limit in mind.
13
https://gateoverflow.in/333189/GATE2020-CS-42Permutations/CombinationsDerangement with repetitionIncorrect methodUsed derangement formula and divided by 2 (formula was also wrong). Should have solved this the normal way, by selecting letters in each position.
14
https://gateoverflow.in/333192/GATE2020-CS-39Propositional LogicValidity of formulaeForgot conceptForgot the concept during the exam (exam panic). If I had kept calm I could've done this.
15
https://gateoverflow.in/333186/GATE2020-CS-45ProbabilityBasic probabilitySecond-guessing answerI was solving correctly, but messed up at the last moment and wrote 1.
16
https://gateoverflow.in/333201/GATE2020-CS-30Computer OrganizationCache MemorySilly mistakeI had the right answer in the scribble pad! Exam panic again.
17
https://gateoverflow.in/333178/GATE2020-CS-53Operating SystemsPaging and TLB
Conceptual calculation mistake?
Not sure what I did wrong in this one. My answer is 155. Some GO commenters say 155 but majority of them say 700+.
18
https://gateoverflow.in/333202/GATE2020-CS-29Digital LogicIEEE RepresentationDid not attemptDid not try due to time slipping away. Forgot some of the concept also due to exam panic. Could've done this.
19
https://gateoverflow.in/333200/GATE2020-CS-31AlgorithmsSpanning Tree algorithmsSilly mistakeI am not sure if the answer should be O(V), O(E + V) or O(ElogV), I selected the last one. I did not spend too much time thinking on this question - just knew that need to check minimum weight property plus ensure no cycle and the best way to do that is to just reapply the MST algorithm(s).
20
https://gateoverflow.in/333197/GATE2020-CS-34Operating SystemsProcess SynchronizationDid not attemptDue to lack of time. Question was definitely doable. Had solved many semaphore questions earlier.
21
https://gateoverflow.in/333183/GATE2020-CS-48C ProgrammingFunction OutputSilly mistakeSome calculation mistake somewhere, answer is definitely 81 but I got 27.
22
https://gateoverflow.in/333188/GATE2020-CS-43Computer OrganizationPipeliningDid not attemptDue to lack of time and lots of data in the question, so did not bother trying. Was doable, had solved questions like this speedup one earlier.
23
https://gateoverflow.in/333199/GATE2020-CS-32Theory of ComputationChecking if CFLConceptual weaknessI wasn't able to get the second one right - I thought it's a CSL. Spent some time thinking but did not arrive at the correct answer. Clearly it is a CFL.
24
https://gateoverflow.in/333193/GATE2020-CS-38Computer NetworksCIDR AssignmentDid not attemptLack of time. Could have solved. Forgot the concept
25
https://gateoverflow.in/333181/GATE2020-CS-50Operating SystemsProcess SchedulingSilly calculation mistakeExam panic. Messed up the calculation and got 10.5 somehow. Second-guessed my idea of "turnaround time" which led to this mistake.
26
https://gateoverflow.in/333198/GATE2020-CS-33Compiler DesignSyntax directed TranslationForgot conceptConcept was an easy one here but I forgot it. Should not have selected an option.
27
https://gateoverflow.in/333179/GATE2020-CS-52Graph TheoryEdge colouringDid not know conceptDid not know the concept at all. Knew vertex colouring. Also forgot what K(3,4) is supposed to represent.
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100