Arrays in Data Structure Quiz Online Practice Test

Test Name:	Arrays in Data Structure Quiz
Subject Category:	Computer Science
Test Type:	Multiple Choice Questions
Total Score / Questions:	30 / 30
Time Allowed:	10 Min
Who Should Practice this Test:	Students, job seekers, or professionals preparing for competitive exams and interviews.

Arrays in Data Structure MCQ Quiz Online Practice Test

1. What is a key benefit of utilizing variable-length arrays?

Determining the array size during runtime

Allocating memory during compilation

Setting up the array during compilation

Accelerating code execution

2. In which location does the GNU C compiler allocate memory for variable-length arrays?

Tree

Stack

Linked List

Queue

3. When appending an element to a variable-length array, what is the time complexity in the worst - case scenario?

O(n)

O(1)

O(n²)

O(log n)

4. How would you describe parallel arrays?

Arrays with identical sizes

Arrays stored consecutively in memory

Arrays containing the same number of elements

Arrays created with dynamic allocation

5. What is a drawback of using parallel arrays compared to traditional arrays?

Parallel arrays are used when a language lacks record support

Reduced locality of reference

Suboptimal cache performance

More cumbersome insertion and deletion operations

6. What is a benefit of using parallel arrays?

Enhanced locality of reference

Minimal direct language support

High cost for resizing

Poor locality of reference for non-sequential access

7. How would you describe a sparse array?

A structure used for representing arrays of records

A structure that efficiently stores bits

An array where most elements share the same value

An array with memory allocated dynamically at runtime

8. In which scenario is a sparse array most useful?

When the array contains unique elements

When the array has a high number of zero elements

When elements of different data types are present

When the array elements are sorted

9. How does a sparse array differ from a traditional array?

A sparse array can accommodate more elements

A sparse array is more memory efficient

A sparse array is dynamic in nature

A traditional array is more efficient

10. Which of the following statements is incorrect?

A suffix array is always sorted

A suffix array is utilized in string matching problems

A suffix array is inherently unsorted

A suffix array includes all the suffixes of a given string

11. To construct a suffix array, which type of traversal should be performed on a suffix tree?

Breadth-first

Level order

Depth-first

Either breadth-first or level order

12. How is the order of a matrix determined?

Number of rows multiplied by the number of columns

Number of columns multiplied by the number of rows

Number of rows multiplied by the number of rows

Number of columns multiplied by the number of columns

13. Which property is not applicable to matrix multiplication?

Associative

Distributive

Commutative

Additive Inverse

14. Which type of matrix predominantly consists of zero elements, but not entirely?

Identity Matrix

Unit Matrix

Sparse Matrix

Zero Matrix

15. How are the sparsity and density of a matrix related?

Sparsity = 1 – Density

Sparsity = 1 + Density

Sparsity = Density × Total number of elements

Sparsity = Density / Total number of elements

16. Identify the correct description of a sorted array.

Array with elements in numerical order

Array with elements in alphabetical order

Array elements at equally spaced memory addresses

All of these

17. Which search method is effective for finding an element in a sorted array?

Linear Search

Jump Search

Binary Search

Fibonacci Search

18. Which scenario does not typically use a sorted array?

Commercial computing

Priority Scheduling

Discrete Mathematics

Hash Tables

19. Using a comparison-based sorting algorithm to construct a suffix array, what is the time complexity involved?

O(nlogn)

O(n²)

O(n²logn)

O(n²) + O(logn)

20. The LCP array, along with which other structure, is used to build a suffix tree?

Hash tree

Hash trie

Suffix array

Balanced tree

21. Inserting an element into a sorted array has a worst-case time complexity of:

O(nlogn)

O(logn)

O(n)

O(n²)

22. How can you allocate a matrix using a single pointer in C, given `r` rows and `c` columns?

`int *arr = malloc(r * c * sizeof(int));`

`int *arr = (int *)malloc(r * c * sizeof(int));`

`int *arr = (int *)malloc(r + c * sizeof(int));`

`int *arr = (int *)malloc(r * c * sizeof(arr));`

23. Which of these does not involve the use of matrices?

Solving linear equations

Image processing

Graph theory

Sorting numbers

24. What is one benefit of using matrices?

Internal complexity

Complex searching

Space inefficiency

Graph plotting

25. If matrix A multiplied by matrix C results in the identity matrix I, what is C?

Identity matrix

Inverse of A

Square of A

Transpose of A

26. Who is credited with coining the term "Sparse Matrix"?

Harry Markowitz

James Sylvester

Chris Messina

Arthur Cayley

27. A matrix with (m) rows and (n) columns is classified as a Sparse Matrix if ________

The number of zero elements exceeds (m times n)2)

The number of zero elements equals (m + n)

The number of zero elements equals ( mn)

The number of zero elements equals (m - n)

28. Which of these is not a common representation method for a Sparse Matrix?

Dictionary of Keys

Linked List

Array

Heap

29. Which of these is a type of Special Sparse Matrix?

Band Matrix

Skew Matrix

Null Matrix

Unit Matrix

30. How can a Symmetric Sparse Matrix be stored most efficiently?

Heap

Binary Tree

Hash Table

Adjacency List