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Dive deep into the fascinating world of Stacks and Queues with our comprehensive set of Multiple-Choice Questions (MCQs). This page is dedicated to exploring the fundamental concepts and intricacies of Stacks and Queues, a crucial aspect of Data Structures and Algorithms. In this section, you will encounter a diverse range of MCQs that cover various aspects of Stacks and Queues, 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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Stacks and Queues MCQs | Page 20 of 25
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push() : push an element into the stack
pop() : pop the top-of-the-stack element
top() : returns the item stored in top-of-the-stack-node
What will be the output after performing these sequence of operations
push(20);
push(4);
top();
pop();
pop();
pop();
push(5);
top();
public Object function()
{
if(isEmpty())
return -999;
else
{
Object high;
high = q[front];
return high;
}
}a)
public Object dequeue()
{
if(count == 0)
{
System.out.println("Queue underflow");
return 0;
}
else
{
Object ele = q[front];
q[front] = null;
front = (front+1)%CAPACITY;
count--;
return ele;
}
}
b)
public Object dequeue()
{
if(count == 0)
{
System.out.println("Queue underflow");
return 0;
}
else
{
Object ele = q[front];
front = (front+1)%CAPACITY;
q[front] = null;
count--;
return ele;
}
}
c)
public Object dequeue()
{
if(count == 0)
{
System.out.println("Queue underflow");
return 0;
}
else
{
front = (front+1)%CAPACITY;
Object ele = q[front];
q[front] = null;
count--;
return ele;
}
}
d)
public Object dequeue()
{
if(count == 0)
{
System.out.println("Queue underflow");
return 0;
}
else
{
Object ele = q[front];
q[front] = null;
front = (front+1)%CAPACITY;
return ele;
count--;
}
}Suggested Topics
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