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## Data Structure Questions and Answers-Stack Operations

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Question 1 [CLICK ON ANY CHOICE TO KNOW MCQ multiple objective type questions RIGHT ANSWER] |

The result of evaluating the postfix expression 5, 4, 6, +, *, 4, 9, 3, /, +, * is?

600 | |

350 | |

650 | |

588 |

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Question 2 [CLICK ON ANY CHOICE TO KNOW MCQ multiple objective type questions RIGHT ANSWER] |

Convert the following infix expressions into its equivalent postfix expressions

(A + B $\wedge$D)/(E - F)+G

(A B D $\wedge$ + E F - / G +) | |

(A B D +$\wedge$ E F - / G +) | |

(A B D $\wedge$ + E F/- G +) | |

None of the mentioned |

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Question 2 Explanation:

Applying the postfix expression evaluation.

Question 3 [CLICK ON ANY CHOICE TO KNOW MCQ multiple objective type questions RIGHT ANSWER] |

Convert the following Infix expression to Postfix form using a stack

x + y * z + (p * q + r) * s, Follow usual precedence rule and assume that the expression is legal.

xyz*+pq*r+s*+ | |

xyz*+pq*r+s+* | |

xyz+*pq*r+s*+ | |

None of the mentioned |

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Question 3 Explanation:

Applying the postfix expression evaluation.

Question 4 [CLICK ON ANY CHOICE TO KNOW MCQ multiple objective type questions RIGHT ANSWER] |

Which of the following statement(s) about stack data structure is/are NOT correct?

Linked List are used for implementing Stacks | |

Top of the Stack always contain the new node | |

Stack is the FIFO data structure | |

Null link is present in the last node at the bottom of the stack |

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Question 4 Explanation:

Stack follows LIFO.

Question 5 [CLICK ON ANY CHOICE TO KNOW MCQ multiple objective type questions RIGHT ANSWER] |

Consider the following operation performed on a stack of size 5.

Push(1);

Pop();

Push(2);

Push(3);

Pop();

Push(4);

Pop();

Pop();

Push(5);

After the completion of all operation, the number of elements present in stack are

1 | |

2 | |

3 | |

4 |

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