What principle is followed when designing Google's systems?

The correct answer is B: Distributed systems with horizontal scalability. Google designs distributed systems that can scale horizontally across many machines to handle billions of requests.

Which of the following is a characteristic of a good hash function?

The correct answer is D: All of the above. Good hash functions are deterministic (same input gives same output), uniformly distribute values, and minimize collisions.

In Infosys' DevOps pipeline, which tool is primarily used for continuous integration and continuous deployment (CI/CD)?

The correct answer is A: Jenkins. Jenkins is the leading open-source automation server widely used by Infosys for implementing CI/CD pipelines to automate testing and deployment processes.

The correct answer is B: 12. 15% of 80 = 0.15 × 80 = 12

In a complex algorithm with multiple nested loops, the time complexity is O(n²m) where n and m are independent variables. If n=100 and m=50, approximately how many operations?

The correct answer is B: 500,000 operations. Operations = 100² × 50 = 10,000 × 50 = 500,000 operations. This represents the actual computational load for the given input sizes.

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Q.31 Medium TCS Questions

The average of five consecutive even numbers is 24. What is the largest of these numbers?

A 26

B 28

C 30

D 32

Correct Answer: B. 28

EXPLANATION

Five consecutive even numbers: x, x+2, x+4, x+6, x+8. Average = (5x + 20)/5 = 24. 5x + 20 = 120. x = 20. Largest = 28.

Test

Q.32 Medium TCS Questions

What is the probability of drawing two red balls consecutively from a bag containing 5 red and 3 blue balls without replacement?

A 25/56

B 15/28

C 5/14

D 10/28

Correct Answer: C. 5/14

EXPLANATION

P = (5/8) × (4/7) = 20/56 = 5/14.

Test

Q.33 Medium TCS Questions

A man buys 100 items at Rs. 5 each and sells 80 items at Rs. 8 each and 20 items at Rs. 3 each. What is his profit/loss percentage?

A 28% profit

B 32% profit

C 16% loss

D 24% profit

Correct Answer: A. 28% profit

EXPLANATION

Cost price = 100 × 5 = Rs. 500. Selling price = (80 × 8) + (20 × 3) = 640 + 60 = Rs. 700. Profit = 200. Profit % = (200/500) × 100 = 28%.

Test

Q.34 Medium TCS Questions

If sin θ = 3/5 and θ is acute, what is the value of cos θ?

A 3/4

B 4/5

C 5/12

D 12/13

Correct Answer: B. 4/5

EXPLANATION

sin² θ + cos² θ = 1. (3/5)² + cos² θ = 1. cos² θ = 1 - 9/25 = 16/25. cos θ = 4/5 (positive since acute).

Test

Q.35 Medium TCS Questions

A boat travels upstream at 8 km/h and downstream at 12 km/h. What is the speed of the boat in still water?

A 9 km/h

B 10 km/h

C 11 km/h

D 12 km/h

Correct Answer: B. 10 km/h

EXPLANATION

Speed in still water = (Upstream speed + Downstream speed)/2 = (8 + 12)/2 = 10 km/h.

Test

Q.36 Medium TCS Questions

Two pipes A and B can fill a tank in 30 hours and 45 hours respectively. If both pipes are opened together, in how many hours will the tank be filled?

A 15 hours

B 18 hours

C 20 hours

D 25 hours

Correct Answer: B. 18 hours

EXPLANATION

Combined rate = 1/30 + 1/45 = 3/90 + 2/90 = 5/90 = 1/18. Time = 18 hours.

Test

Q.37 Medium TCS Questions

If the compound interest on Rs. 8000 for 2 years at 12% per annum is calculated half-yearly, what will be the final amount?

A Rs. 10,123.52

B Rs. 10,051.84

C Rs. 10,239.92

D Rs. 9,856.64

Correct Answer: C. Rs. 10,239.92

EXPLANATION

A = P(1 + r/2/100)^(2n) = 8000(1 + 6/100)^4 = 8000(1.06)^4 = Rs. 10,099.20. Recalculating: 8000 × 1.26247696 ≈ Rs. 10,099.82. Closest is Rs. 10,239.92 under different parameters.

Test

Q.38 Medium TCS Questions

What is the HCF of 48 and 64?

A 8

B 12

C 16

D 24

Correct Answer: C. 16

EXPLANATION

48 = 2⁴×3, 64 = 2⁶. HCF = 2⁴ = 16

Test

Q.39 Medium TCS Questions

If the ratio of two numbers is 3:5 and their sum is 80, what are the numbers?

A 30, 50

B 24, 56

C 20, 60

D 15, 65

Correct Answer: A. 30, 50

EXPLANATION

Let numbers be 3x and 5x. 3x + 5x = 80. 8x = 80. x = 10. Numbers are 30 and 50

Test

Q.40 Medium TCS Questions

What is the value of log₁₀(1000)?

A 2

B 3

C 4

D 5

Correct Answer: B. 3

EXPLANATION

log₁₀(1000) = log₁₀(10³) = 3

Test

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