Arrays: Questions and Answers
Here’s a set of questions and answers on arrays to help students understand and
review the key concepts related to arrays, their operations, and their applications.
1. What is an Array?
Q: What is an array?
A: An array is a collection of elements, all of the same type, stored in contiguous
memory locations. Each element can be accessed using an index or a subscript.
2. Types of Arrays
Q: What are the different types of arrays?
A: The different types of arrays are:
One-dimensional array: A linear array consisting of elements arranged in a
single row.
Two-dimensional array: A matrix-like structure with rows and columns.
Multi-dimensional array: Arrays with more than two dimensions.
Dynamic array: An array whose size can change during runtime.
3. Array Operations
Q: What are the common operations on arrays?
A: The common array operations include:
Insertion: Adding an element at the beginning, end, or a specific position.
Deletion: Removing an element from the array.
Traversal: Accessing each element of the array for processing.
Searching: Finding an element based on its value.
Updating: Modifying the value of an element at a specific index.
, 4. Insertion in an Array
Q: How do you insert an element into an array?
A: Insertion in an array can be done at:
Beginning: Shift all elements to the right and insert the new element at the
0th index.
End: Place the new element at the last index.
Specific position: Shift all elements from the position onwards to the right
and insert the new element at the specified index.
5. Deletion from an Array
Q: How do you delete an element from an array?
A: Deletion in an array involves:
From the beginning: Shift all elements one position to the left.
From the end: Simply remove the last element.
From a specific position: Shift all elements after the deleted element to the
left to fill the gap.
6. Searching an Element in an Array
Q: How do you search for an element in an array?
A: There are two common ways to search:
Linear Search: Traverse the array and check each element until the target is
found or the end of the array is reached. Time complexity: O(n)O(n)O(n).
Binary Search: If the array is sorted, binary search divides the array into
halves to find the target element efficiently. Time complexity: O(logn)O(\log
n)O(logn).
Here’s a set of questions and answers on arrays to help students understand and
review the key concepts related to arrays, their operations, and their applications.
1. What is an Array?
Q: What is an array?
A: An array is a collection of elements, all of the same type, stored in contiguous
memory locations. Each element can be accessed using an index or a subscript.
2. Types of Arrays
Q: What are the different types of arrays?
A: The different types of arrays are:
One-dimensional array: A linear array consisting of elements arranged in a
single row.
Two-dimensional array: A matrix-like structure with rows and columns.
Multi-dimensional array: Arrays with more than two dimensions.
Dynamic array: An array whose size can change during runtime.
3. Array Operations
Q: What are the common operations on arrays?
A: The common array operations include:
Insertion: Adding an element at the beginning, end, or a specific position.
Deletion: Removing an element from the array.
Traversal: Accessing each element of the array for processing.
Searching: Finding an element based on its value.
Updating: Modifying the value of an element at a specific index.
, 4. Insertion in an Array
Q: How do you insert an element into an array?
A: Insertion in an array can be done at:
Beginning: Shift all elements to the right and insert the new element at the
0th index.
End: Place the new element at the last index.
Specific position: Shift all elements from the position onwards to the right
and insert the new element at the specified index.
5. Deletion from an Array
Q: How do you delete an element from an array?
A: Deletion in an array involves:
From the beginning: Shift all elements one position to the left.
From the end: Simply remove the last element.
From a specific position: Shift all elements after the deleted element to the
left to fill the gap.
6. Searching an Element in an Array
Q: How do you search for an element in an array?
A: There are two common ways to search:
Linear Search: Traverse the array and check each element until the target is
found or the end of the array is reached. Time complexity: O(n)O(n)O(n).
Binary Search: If the array is sorted, binary search divides the array into
halves to find the target element efficiently. Time complexity: O(logn)O(\log
n)O(logn).
