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MCQ

The postfix form of A*B+C/D is

*AB/CD+

AB*CD/+

A*BC+/D

ABCD+/*

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MCQ

Post fix form of following infix expression is - * + A B - C D

ABCD + - *

AB + CD - *

AB + CD * -

AB + C - D *

Discussion

MCQ

Consider these functions:
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();

stack underflow

Discussion

MCQ

Select the code snippet which return true if the stack is empty, false otherwise.

public boolean empty()
{
     return q2.isEmpty();
}

public boolean empty() 
{
     return q1.isEmpty() || q2.isEmpty();
}

public boolean empty() 
{
     return q1.isEmpty();
}

public boolean empty() 
{
     return q1.isEmpty() & q2.isEmpty();
}

Discussion

MCQ

In C programming, when we remove an item from bottom of the stack, then ?

The stack will fall down.

Stack will rearranged items.

It will convert to LIFO

This operation is not allowed.

Discussion

MCQ

What is the postfix form of the following prefix expression -A/B*C$DE ?

ABCDE$*/-

A-BCDE$*/-

ABC$ED*/-

A-BCDE$*/

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Queues

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Binary Trees

B Trees

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Hash based structures

Graphs

Mixed

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