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Quiz on Radix Sort in DSA

Quiz on Radix Sort in DSA

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Question 1 of 10

1. Question

What type of data is Radix Sort mainly used for?

Floating-point numbers
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Strings and characters
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Integers with known digit ranges
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Boolean values
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Question 2 of 10

2. Question

Which of the following is the correct time complexity of Radix Sort (for n elements with d digits)?

O(n²)
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O(n log n)
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O(n × d)
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O(d² × n)
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Question 3 of 10

3. Question

What is the role of a stable sort in Radix Sort?

It helps count the digits
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It ensures correct relative ordering of equal elements
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It swaps elements randomly
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It increases the speed
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Question 4 of 10

4. Question

Which sorting algorithm is commonly used as a subroutine in Radix Sort?

Merge Sort
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Quick Sort
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Counting Sort
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Selection Sort
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Question 5 of 10

5. Question

How does Radix Sort process the digits of a number?

From the most significant digit to the least
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From both ends simultaneously
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Randomly
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From the least significant digit to the most
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Question 6 of 10

6. Question

Radix Sort is not comparison-based. What does this mean?

It doesn’t use recursion
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It avoids comparing values directly
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It doesn’t use sorting logic
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It only works on sorted data
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Question 7 of 10

7. Question

Which of the following is a limitation of Radix Sort?

It can only sort strings
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It needs additional space for buckets or counting
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It works slower than Bubble Sort
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It can’t handle negative numbers
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Question 8 of 10

8. Question

In which scenario is Radix Sort most efficient?

When the input size is small
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When all numbers are already sorted
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When sorting integers with the same number of digits
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When sorting floating-point numbers
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Question 9 of 10

9. Question

What does Radix Sort do at each digit level?

It divides the array
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It applies a stable sort
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It merges subarrays
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It replaces the numbers
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Question 10 of 10

10. Question

Why is Radix Sort not always the preferred sorting algorithm?

It’s hard to understand
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It uses more memory than some comparison-based sorts
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It can only work on characters
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It needs the data in descending order
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