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REVISION AND PRACTICE
Revision and practice with explained answers
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YOUR COURSE DATA · TRY IT HERE
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BhuvaneshMaths 68 · Erode
- CardNo
- 0
- Name
- Bhuvanesh
- Gender
- M
- DateOfBirth
- 7 Nov
- CityTown
- Erode
- Mathematics
- 68
- Physics
- 64
- Chemistry
- 78
- Total
- 210
HarishMaths 62 · Salem
- CardNo
- 1
- Name
- Harish
- Gender
- M
- DateOfBirth
- 3 Jun
- CityTown
- Salem
- Mathematics
- 62
- Physics
- 45
- Chemistry
- 91
- Total
- 198
ShashankMaths 57 · Chennai
- CardNo
- 2
- Name
- Shashank
- Gender
- M
- DateOfBirth
- 4 Jan
- CityTown
- Chennai
- Mathematics
- 57
- Physics
- 54
- Chemistry
- 77
- Total
- 188
RidaMaths 42 · Chennai
- CardNo
- 3
- Name
- Rida
- Gender
- F
- DateOfBirth
- 5 May
- CityTown
- Chennai
- Mathematics
- 42
- Physics
- 53
- Chemistry
- 78
- Total
- 173
RitikaMaths 87 · Madurai
- CardNo
- 4
- Name
- Ritika
- Gender
- F
- DateOfBirth
- 17 Nov
- CityTown
- Madurai
- Mathematics
- 87
- Physics
- 64
- Chemistry
- 89
- Total
- 240
AkshayaMaths 71 · Chennai
- CardNo
- 5
- Name
- Akshaya
- Gender
- F
- DateOfBirth
- 8 Feb
- CityTown
- Chennai
- Mathematics
- 71
- Physics
- 92
- Chemistry
- 84
- Total
- 247
SameerMaths 81 · Ambur
- CardNo
- 6
- Name
- Sameer
- Gender
- M
- DateOfBirth
- 23 Mar
- CityTown
- Ambur
- Mathematics
- 81
- Physics
- 82
- Chemistry
- 87
- Total
- 250
AdityaMaths 84 · Vellore
- CardNo
- 7
- Name
- Aditya
- Gender
- M
- DateOfBirth
- 15 Mar
- CityTown
- Vellore
- Mathematics
- 84
- Physics
- 92
- Chemistry
- 76
- Total
- 252
SuryaMaths 74 · Bengaluru
- CardNo
- 8
- Name
- Surya
- Gender
- M
- DateOfBirth
- 28 Feb
- CityTown
- Bengaluru
- Mathematics
- 74
- Physics
- 64
- Chemistry
- 51
- Total
- 189
ClarenceMaths 63 · Bengaluru
- CardNo
- 9
- Name
- Clarence
- Gender
- M
- DateOfBirth
- 6 Dec
- CityTown
- Bengaluru
- Mathematics
- 63
- Physics
- 88
- Chemistry
- 73
- Total
- 224
KavyaMaths 64 · Chennai
- CardNo
- 10
- Name
- Kavya
- Gender
- F
- DateOfBirth
- 12 Jan
- CityTown
- Chennai
- Mathematics
- 64
- Physics
- 72
- Chemistry
- 68
- Total
- 204
RahulMaths 97 · Bengaluru
- CardNo
- 11
- Name
- Rahul
- Gender
- M
- DateOfBirth
- 30 Apr
- CityTown
- Bengaluru
- Mathematics
- 97
- Physics
- 92
- Chemistry
- 92
- Total
- 281
SrinidhiMaths 52 · Chennai
- CardNo
- 12
- Name
- Srinidhi
- Gender
- F
- DateOfBirth
- 14 Jan
- CityTown
- Chennai
- Mathematics
- 52
- Physics
- 64
- Chemistry
- 71
- Total
- 187
GopiMaths 65 · Madurai
- CardNo
- 13
- Name
- Gopi
- Gender
- M
- DateOfBirth
- 6 May
- CityTown
- Madurai
- Mathematics
- 65
- Physics
- 73
- Chemistry
- 89
- Total
- 227
SophiaMaths 89 · Trichy
- CardNo
- 14
- Name
- Sophia
- Gender
- F
- DateOfBirth
- 23 July
- CityTown
- Trichy
- Mathematics
- 89
- Physics
- 62
- Chemistry
- 93
- Total
- 244
GoutamiMaths 76 · Theni
- CardNo
- 15
- Name
- Goutami
- Gender
- F
- DateOfBirth
- 22 Sep
- CityTown
- Theni
- Mathematics
- 76
- Physics
- 58
- Chemistry
- 90
- Total
- 224
TauseefMaths 87 · Trichy
- CardNo
- 16
- Name
- Tauseef
- Gender
- M
- DateOfBirth
- 30 Dec
- CityTown
- Trichy
- Mathematics
- 87
- Physics
- 86
- Chemistry
- 43
- Total
- 216
ArshadMaths 62 · Chennai
- CardNo
- 17
- Name
- Arshad
- Gender
- M
- DateOfBirth
- 14 Dec
- CityTown
- Chennai
- Mathematics
- 62
- Physics
- 81
- Chemistry
- 67
- Total
- 210
AbiramiMaths 72 · Erode
- CardNo
- 18
- Name
- Abirami
- Gender
- F
- DateOfBirth
- 9 Oct
- CityTown
- Erode
- Mathematics
- 72
- Physics
- 92
- Chemistry
- 97
- Total
- 261
VetrivelMaths 56 · Trichy
- CardNo
- 19
- Name
- Vetrivel
- Gender
- M
- DateOfBirth
- 30 Aug
- CityTown
- Trichy
- Mathematics
- 56
- Physics
- 78
- Chemistry
- 62
- Total
- 196
KalyanMaths 93 · Vellore
- CardNo
- 20
- Name
- Kalyan
- Gender
- M
- DateOfBirth
- 17 Sep
- CityTown
- Vellore
- Mathematics
- 93
- Physics
- 68
- Chemistry
- 91
- Total
- 252
MonikaMaths 78 · Bengaluru
- CardNo
- 21
- Name
- Monika
- Gender
- F
- DateOfBirth
- 15 Mar
- CityTown
- Bengaluru
- Mathematics
- 78
- Physics
- 69
- Chemistry
- 74
- Total
- 221
PriyaMaths 62 · Nagercoil
- CardNo
- 22
- Name
- Priya
- Gender
- F
- DateOfBirth
- 17 Jul
- CityTown
- Nagercoil
- Mathematics
- 62
- Physics
- 62
- Chemistry
- 57
- Total
- 181
DeepikaMaths 97 · Bengaluru
- CardNo
- 23
- Name
- Deepika
- Gender
- F
- DateOfBirth
- 13 May
- CityTown
- Bengaluru
- Mathematics
- 97
- Physics
- 91
- Chemistry
- 88
- Total
- 276
SiddharthMaths 44 · Madurai
- CardNo
- 24
- Name
- Siddharth
- Gender
- M
- DateOfBirth
- 26 Dec
- CityTown
- Madurai
- Mathematics
- 44
- Physics
- 72
- Chemistry
- 58
- Total
- 174
GeetaMaths 87 · Chennai
- CardNo
- 25
- Name
- Geeta
- Gender
- F
- DateOfBirth
- 16 May
- CityTown
- Chennai
- Mathematics
- 87
- Physics
- 75
- Chemistry
- 92
- Total
- 254
JKMaths 74 · Chennai
- CardNo
- 26
- Name
- JK
- Gender
- M
- DateOfBirth
- 22 Jul
- CityTown
- Chennai
- Mathematics
- 74
- Physics
- 71
- Chemistry
- 82
- Total
- 227
JaganMaths 81 · Madurai
- CardNo
- 27
- Name
- Jagan
- Gender
- M
- DateOfBirth
- 4 Mar
- CityTown
- Madurai
- Mathematics
- 81
- Physics
- 76
- Chemistry
- 52
- Total
- 209
NishaMaths 74 · Madurai
- CardNo
- 28
- Name
- Nisha
- Gender
- F
- DateOfBirth
- 10 Sep
- CityTown
- Madurai
- Mathematics
- 74
- Physics
- 83
- Chemistry
- 83
- Total
- 240
NaveenMaths 72 · Vellore
- CardNo
- 29
- Name
- Naveen
- Gender
- M
- DateOfBirth
- 13 Oct
- CityTown
- Vellore
- Mathematics
- 72
- Physics
- 66
- Chemistry
- 81
- Total
- 219
Try the mixed questions first, then reveal the reasoning. State the input order, initialization, comparison and tie policy before tracing a procedure.
Choose the pattern
| Task | State / method |
|---|---|
| Find any matching record | Found flag; stop when true. |
| Find maximum value | Running best seeded safely. |
| Find all maximum owners | Best value plus reset-or-append list. |
| Longest sentence | Local Count plus global Longest. |
| Largest group frequency | Per-group counts plus MaxCount. |
| Largest nonnegative group total | Per-group totals plus running maximum. |
| Select globally rare words | Complete counts, then second-pass filter. |
| Translate nested conditions | Track block scope and every else. |
Twenty mixed questions
Try it yourself
1. An early-exit search sees a match on the last card. Does Found=True imply it stopped before exhausting the pile?
Show explained answer
No. A last-card match can make Found=True just as the pile becomes empty. Inspect the flag and the remaining-pile state separately.
Try it yourself
2. Starting from the first actual value, trace the maximum for 4,2,8,8,3.
Show explained answer
Max values after visits: 4,4,8,8,8.
Try it yourself
3. Why is Max=100 wrong for marks whose actual maximum is 97, using a strict greater test?
Show explained answer
No score exceeds 100, so the incorrect seed survives and invents a maximum of 100.
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4. For −5,−9,−2, find maximum and minimum.
Show explained answer
Maximum=−2, minimum=−9. Seed from an actual value rather than assuming zero is suitable.
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5. Values at IDs A,B,C,D are 6,9,9,8. Give first, last and all maximum owners.
Show explained answer
Maximum=9. First owner B; last owner C; all owners [B,C].
Try it yourself
6. Current Max=9 with Owners=[B,C]. The next record E has 12. What updates?
Show explained answer
Max=12 and Owners=[E]. Replace the earlier owner list; do not append E to the obsolete 9-winners.
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7. A sentence’s fourth word carries a full stop. When should its count be compared and reset?
Show explained answer
Increment to 4, compare 4 with Longest, then reset Count to 0 for the next sentence.
Try it yourself
8. Grouped labels A,A,B,B,B have counts finalized only on label changes. What must happen at end?
Show explained answer
Finalize B’s count of 3 after the loop; otherwise the last group may never update the maximum.
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9. For labels X,Y,X,Y,Y,Z, give counts and maximum frequency.
Show explained answer
X=2, Y=3, Z=1; MaxFrequency=3.
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10. Two stores have bill amounts [10,20,30] and [100]. Which has more bills and which more revenue?
Show explained answer
The first has more bills (3). The second has more revenue (100 versus 60).
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11. Why must a new category counter be incremented after being created at zero?
Show explained answer
The current record is the first occurrence. Merely creating a zero counter would omit it.
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12. Normalize IT, it. and It, under the stated word rule.
Show explained answer
All become it, so they share one counter with combined frequency 3.
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13. For sun,rain,sun,wind, which words have final frequency 1?
Show explained answer
rain and wind. Neither sun occurrence qualifies.
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14. Does seeing a word once so far prove it belongs in the final uniqueness output?
Show explained answer
No. A later card can repeat the key; complete the frequency pass first.
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15. Old Count=3. Evaluate Count=Count+1, then test Count==4.
Show explained answer
Assignment stores 4. The following equality test is True.
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16. What does NOT Found evaluate to if Found=True?
Show explained answer
False, so a while condition using more-cards AND NOT Found stops.
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17. A Madurai M record enters a nested Chennai-only group split. What should happen?
Show explained answer
Neither Chennai count changes. The outer city condition fails.
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18. Why is if(Chennai AND F)…else MCount++ not the same as a Chennai-only F/M split?
Show explained answer
Its else includes every non-Chennai record too. The combined condition’s negation is broader than “Chennai and M”.
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19. What are the supplied dataset’s maths maximum and longest sentence length?
Show explained answer
Mathematics maximum=97 with cards 11 and 23; longest sentence=25 words.
Try it yourself
20. Which checks should be tried before trusting a maximum-owner algorithm?
Show explained answer
Empty input, one record, all-zero or negative values, tied maxima, a later higher score, and the intended first/last/all tie policy.