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Welcome to the Arrays and Pointers MCQs Page

Dive deep into the fascinating world of Arrays and Pointers with our comprehensive set of Multiple-Choice Questions (MCQs). This page is dedicated to exploring the fundamental concepts and intricacies of Arrays and Pointers, a crucial aspect of Data Structures and Algorithms. In this section, you will encounter a diverse range of MCQs that cover various aspects of Arrays and Pointers, from the basic principles to advanced topics. Each question is thoughtfully crafted to challenge your knowledge and deepen your understanding of this critical subcategory within Data Structures and Algorithms.

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Check out the MCQs below to embark on an enriching journey through Arrays and Pointers. Test your knowledge, expand your horizons, and solidify your grasp on this vital area of Data Structures and Algorithms.

Note: Each MCQ comes with multiple answer choices. Select the most appropriate option and test your understanding of Arrays and Pointers. You can click on an option to test your knowledge before viewing the solution for a MCQ. Happy learning!

Arrays and Pointers MCQs | Page 12 of 15

Explore more Topics under Data Structures and Algorithms

Q111.
To search for an element in a sorted array, which searching technique can be used?
Discuss
Answer: (c).Binary Search
Q112.
What are some of the applications of sorted arrays?
Discuss
Answer: (d).All of the mentioned
Q113.
What is the worst case time complexity of inserting an element into the sorted array?
Discuss
Answer: (c).O(n)
Discuss
Answer: (c).An array in which most of the elements have the same value
Discuss
Answer: (b).When the array has more occurrence of zero elements
Discuss
Answer: (b).Sparse array is memory efficient
Q117.
Choose the code which performs the store operation in a sparse array.(Linked list implementation)
a)

public void store(int index, Object val)
{
       List cur = this;
       List prev = null;
 
       List node = new List(index);
       node.val = val;
 
       while (cur != null && cur.index < index)
       {
           prev = cur;
           cur = cur.next;
       }
 
       if (cur == null)
       {
           prev.next = node;
       } else
       {
           if (cur.index == index)
           {
               System.out.println("DUPLICATE");
               return;
           }
           prev.next = node;
           node.next = cur;
       }
       return;
}

b)

public void store(int index, Object val)
{
        List cur = this;
        List prev = null;
 
        List node = new List(index);
        node.val = val;
 
        while (prev != null && prev.index < index)
        {
            prev = cur;
            cur = cur.next;
        }
 
        if (cur == null)
        {
            prev.next = node;
        } else
        {
            if (cur.index == index)
            {
                System.out.println("DUPLICATE");
                return;
            }
            prev.next = node;
            node.next = cur;
        }
        return;
}

c)

public void store(int index, Object val)
{
        List cur = this;
        List prev = null;
 
        List node = new List(index);
        node.val = val;
 
        while (cur != null && cur.index < index)
        {
   cur = cur.next;
            prev = cur;
        }
 
        if (cur == null)
        {
            prev.next = node;
        } else
        {
            if (cur.index == index)
            {
                System.out.println("DUPLICATE");
                return;
            }
            prev.next = node;
            node.next = cur;
        }
        return;
}

d) None of the mentioned

a.

a

b.

b

c.

c

d.

d

Discuss
Answer: (a).a
Q118.
Which of the following performs the fetch operation?
a)

public Object fetch(int index)
{
        List cur = this.next;
        Object val = null;
        while (cur != null && cur.index != index)
        {
            cur = cur.next;
        }
        if (cur != null)
        {
            val = cur.val;
        } else
        {
            val = null;
        }
        return val;
}

b)

public Object fetch(int index)
{
        List cur = this;
        Object val = null;
        while (cur != null && cur.index != index)
        {
            cur = cur.next;
        }
        if (cur != null)
        {
            val = cur.val;
        } else
        {
            val = null;
        }
        return val;
}

c)

public Object fetch(int index)
{
        List cur = this;
        Object val = null;
        while (cur != null && cur.index != index)
        {
            cur = cur.index;
        }
        if (cur != null)
        {
            val = cur.val;
        } else
        {
            val = null;
        }
        return val;
}

d) None of the mentioned

a.

a

b.

b

c.

c

d.

d

Discuss
Answer: (a).a
Q119.
Choose the appropriate code that counts the number of non-zero(non-null) elements in the sparse array.
a)

public int count()
{
        int count = 0;
        for (List cur = this.next; (cur != null); cur = cur.next)
        {
            count++;
        }
        return count;
}

b)

public int count()
{
        int count = 0;
        for (List cur = this; (cur != null); cur = cur.next)
        {
            count++;
        }
        return count;
}

c)

public int count()
{
        int count = 1;
        for (List cur = this.next; (cur != null); cur = cur.next)
        {
            count++;
        }
        return count;
}

d) None of the mentioned

a.

a

b.

b

c.

c

d.

d

Discuss
Answer: (a).a
Q120.
Suppose the contents of an array A are, A = {1, null, null, null, null, 10};
What would be the size of the array considering it as a normal array and a sparse array?
Discuss
Answer: (b).6 and 2

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