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Difficulty: All Easy Medium Hard 41–50 of 100

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Q.41 Medium TCS Questions

What is the space complexity of the merge sort algorithm?

A O(1)

B O(n)

C O(log n)

D O(n log n)

Correct Answer: B. O(n)

EXPLANATION

Merge sort requires O(n) extra space for creating temporary arrays during the merge process.

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Q.42 Easy TCS Questions

If the binary representation of a number is 10110, what is its decimal equivalent?

A 20

B 22

C 24

D 26

Correct Answer: B. 22

EXPLANATION

10110₂ = 1×16 + 0×8 + 1×4 + 1×2 + 0×1 = 16 + 4 + 2 = 22

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Q.43 Medium TCS Questions

Which data structure is most efficient for implementing a priority queue in competitive programming?

A Array

B Linked List

C Heap

D Binary Search Tree

Correct Answer: C. Heap

EXPLANATION

Heaps provide O(log n) insertion and deletion, making them optimal for priority queues compared to other structures.

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Q.44 Easy TCS Questions

A company has 120 employees. 45% work in development, 30% in testing, and remaining in support. How many work in support?

A 30

B 25

C 35

D 40

Correct Answer: A. 30

EXPLANATION

Support = 100% - 45% - 30% = 25% of 120 = 30 employees.

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Q.45 Easy TCS Questions

What is the output of the following pseudocode?
count = 0
for i = 1 to 5
for j = 1 to i
count++
print count

A 10

B 15

C 20

D 25

Correct Answer: B. 15

EXPLANATION

The nested loop runs: 1+2+3+4+5 = 15 times. This is the sum of first 5 natural numbers.

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Q.46 Hard TCS Questions

In a coding problem, you need to find the longest palindromic substring. What would be the optimal time complexity?

A O(n²)

B O(n)

C O(n log n)

D O(n³)

Correct Answer: B. O(n)

EXPLANATION

Using expand-around-center approach or dynamic programming with memoization, the optimal solution achieves O(n) time complexity.

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Q.47 Easy TCS Questions

TCS follows which software development methodology as its primary approach?

A Agile and DevOps

B Waterfall only

C Spiral model

D Prototype model

Correct Answer: A. Agile and DevOps

EXPLANATION

TCS extensively uses Agile methodologies combined with DevOps practices for faster delivery and continuous integration.

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Q.48 Easy TCS Questions

Solve: 2x + 3 = 11

A x = 3

B x = 4

C x = 5

D x = 6

Correct Answer: B. x = 4

EXPLANATION

2x + 3 = 11 → 2x = 8 → x = 4

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Q.49 Medium TCS Questions

A number is 5 more than another number. If their sum is 25, find the larger number.

A 10

B 12

C 15

D 18

Correct Answer: C. 15

EXPLANATION

Let smaller number = x. Larger = x+5. Sum: x + (x+5) = 25 → 2x = 20 → x = 10. Larger = 15

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Q.50 Easy TCS Questions

Which programming language is most preferred by TCS for their 2024-25 placements?

A Python and Java

B C and COBOL only

C JavaScript exclusively

D Assembly language

Correct Answer: A. Python and Java

EXPLANATION

TCS 2024-25 placement drive prioritizes Java and Python as primary programming languages, reflecting current industry trends

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