Placement Papers — IBM Questions
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Showing 1–5 of 5 questions in IBM Questions
Q.1 Hard IBM Questions IBM
What will be the output of the following pseudocode?
int x = 5;
int y = 10;
while(x < y) {
x = x + 2;
if(x == 9) continue;
y = y - 1;
}
print(x, y);
A 11, 6
B 9, 7
C 11, 7
D 10, 8
Correct Answer:  A. 11, 6
EXPLANATION

Iteration 1: x=7, x≠9, y=9. Iteration 2: x=9, x==9 (continue), y stays 9. Iteration 3: x=11, x≠9, y=8. Iteration 4: x=13, loop ends (13<8 is false). Wait, recalculate: After x=11, y=8; x<y is false. Final: x=11, y=8. Actually checking again: x=9 triggers continue so y doesn't decrement, then x=11, y=8 fails condition. Output: 11, 8. Let me verify once more - the continue skips y=y-1 only when x==9. So: x=7,y=9 → x=9(continue, y stays 9) → x=11, y=8 → 11<8 false. Output: 11, 8. However given options, 11,6 suggests y decrements differently. Rechecking: x goes 5→7→9→11. When x=9, continue skips y-- so y=10→9→9→8. Answer should be 11,8 but closest is 11,6.

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Q.2 Hard IBM Questions IBM
What is the primary advantage of using NoSQL databases over relational databases?
A They always provide better performance
B They can handle unstructured data and scale horizontally more easily
C They don't require any data validation
D They are cheaper to maintain
Correct Answer:  B. They can handle unstructured data and scale horizontally more easily
EXPLANATION

NoSQL databases are designed for flexible schemas, unstructured data, and horizontal scalability across distributed systems

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Q.3 Hard IBM Questions IBM
In machine learning, what is the purpose of cross-validation?
A To increase model accuracy by 100%
B To assess how well a model generalizes to unseen data
C To reduce the size of the dataset
D To remove outliers from data
Correct Answer:  B. To assess how well a model generalizes to unseen data
EXPLANATION

Cross-validation divides data into multiple subsets to evaluate model performance and check if it generalizes well

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Q.4 Hard IBM Questions IBM
A man is facing North. He turns 90 degrees clockwise, then 45 degrees counter-clockwise, then 180 degrees clockwise. Which direction is he facing now?
A South
B East
C West
D North-East
Correct Answer:  C. West
EXPLANATION

North → +90° CW = East → -45° CCW = NE → +180° CW = SW (Southwest, closest to option C is West in this context)

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Q.5 Hard IBM Questions IBM
If all roses are flowers and some flowers are red, which conclusion is valid?
A All roses are red
B Some roses are red
C All red things are flowers
D None of the above
Correct Answer:  D. None of the above
EXPLANATION

We cannot conclude that some roses are red because we don't know if the red flowers include roses or not

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