Placement Papers - MCQ Practice Questions

Rate of A = $\frac{1}{12}$, Rate of B = $\frac{1}{18}$. Combined rate = $\frac{1}{12}$ + $\frac{1}{18}$ = $\frac{5}{36}$. Time = $\frac{36}{5}$ = 7.2 hours

The number could be 11, 18, 25, 32, etc. (of form 7k+4). When divided by 11, remainders vary: 11→0, 18→7, 25→3, 32→10. Cannot determine uniquely.

Train + Bus = 60% + 30% = 90%. Walk = 10% = 20 km. Total = $\frac{20}{0}$.10 = 200 km

Let numbers be 2x, 3x, 5x. Sum = 2x + 3x + 5x = 10x = 100. x = 10. Largest = 5x = 50

Number = 12k + 5. When divided by 4: 12k + 5 = 4(3k) + 4 + 1 = 4(3k+1) + 1. Remainder = 1

Work is inversely proportional to number of workers. (5 × 12) = (10 × x), so x = 6 days

Cost Price = 10 × 50 = 500. Selling Price = 10 × 60 = 600. Profit = 100. Profit% = ($\frac{100}{500}$) × 100 = 20%

Roses are a subset of flowers, but we don't know which flowers are red. Some red flowers might not be roses.

R=4, O=5, S=6, E=7. Following alphabet position: P=1(9), E=7(8), T=2(9→2 with shift), A=1, L=4. PETAL = 89214

Benign means harmless, kind, or gentle. Friendly is the closest synonym

Verbose means using more words than necessary. Concise is its opposite—using few words

Quick Sort has O(n log n) average case complexity, which is optimal among comparison-based sorts

Both operands are integers, so integer division is performed: $\frac{10}{3}$ = 3 (truncated)

Database normalization organizes data to minimize redundancy and improve data integrity

Microservices architecture emphasizes small, independent services that communicate through APIs

Let original = x. After operations: x × 0.5 × 4 = 2x = 200% of x

Boys:Girls = 3:2, total parts = 5. Girls = ($\frac{2}{5}$) × 45 = 18

var has function scope, let/const have block scope. const prevents reassignment but let allows it

Total distance = 60×2 + 40×3 = 120 + 120 = 240 km. Total time = 2 + 3 = 5 hours. Average = $\frac{240}{5}$ = 48 km/h

Let distance = d. Time = Distance/Speed. d/60 + d/40 = 10. LCM(60,40) = 120. (2d + 3d)/120 = 10. 5d = 1200. d = 240 km.