Placement Papers - MCQ Practice Questions

String slicing s[1:4] returns characters from index 1 to 3 (4 is exclusive): 'e', 'l', 'l' = 'ell'

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

A firewall is a security barrier that filters network traffic based on predetermined rules to protect systems from unauthorized access

log₂(8) means 2^? = 8. Since 2³ = 8, the answer is 3

For independent events: P(A and B) = P(A) × P(B) = 0.4 × 0.3 = 0.12

Let distance = d. Time = Distance/Speed. Going: d/60, Returning: d/40. Total: d/60 + d/40 = 10. Taking LCM: (2d + 3d)/120 = 10, so 5d/120 = 10, therefore d = 240 km.

The pattern is n(n+1) where n = 1,2,3,4,5,6... First term: 1×2=2, Second: 2×3=6, Third: 3×4=12, Fourth: 4×5=20, Fifth: 5×6=30, Sixth: 6×7=42.

Ephemeral (short-lived) is opposite to Permanent (long-lasting). Similarly, Verbose (using many words) is opposite to Concise (using few words). The analogy requires antonyms.

CI = P(1 + r/100)^n - P = 8000(1 + $\frac{10}{100}$)^2 - 8000 = 8000(1.1)^2 - 8000 = 8000(1.21) - 8000 = 9,680 - 8,000 = ₹1,680.