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# Data Structures :: Stacks

Home > Technical Aptitude > Data Structures > Stacks > General Questions
NA
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The five items: A,B,C,D and E are pushed in stack, one after the other starting from A. The stack is

Is popped four items and each element is inserted in a queue. Then two elements are deleted from the queue and pushed back on the stack . Now one item is popped from the stack.

The popped item is.

AA

BB

CC

DD

Explanation:

Here is no explanation for this answer

Workspace

NA
SHSTTON
130
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89
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219
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Convert the infix to postfix for A-(B+C)*(D/E)

AABC+DE/*-

BABC-DE/*-

CABC-DE*/-

DNone of the above

Explanation:

Here is no explanation for this answer

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NA
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105
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64
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What is the postfix form of the following prefix expression -A/B*C$DE AABCDE$*/-

BA-BCDE$*/- CABC$ED*/-

DA-BCDE\$*/

Explanation:

Here is no explanation for this answer

Workspace

NA
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40
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The minimum number of multiplications and additions required to evaluate the polynomial
P = 4x^3+3x^2-15x+45 is

A6&3

B4&2

C3&3

D8&3

Explanation:

Here is no explanation for this answer

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NA
SHSTTON
172
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48
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The data structure required to evaluate a postfix expression is

Aqueue

Bstack

Carray

Explanation:

Here is no explanation for this answer

Workspace

NA
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145
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The data structure required to check whether an expression contains balanced parenthesis is

AStack

BQueue

CTree

DArray

Explanation:

Here is no explanation for this answer

Workspace

NA
SHSTTON
123
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72
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The process of accessing data stored in a serial access memory is similar to manipulating data on a

Aheap

Bqueue

Cstack

Dbinary tree

Explanation:

Here is no explanation for this answer

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NA
SHSTTON
76
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76
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The postfix form of the expression is (A+B) * (C*D-E)*F/G is

AAB+CD*E-FG/**

BAB+CD*E-*F*G/

CAB+CD*E-F**G/

DAB+CDE*-*F*G/

Explanation:

Here is no explanation for this answer

Workspace

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46
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136
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182
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The pre-order and post order traversal of a Binary Tree generates the same output. The tree can have maximum

AThree nodes

BTwo nodes

COne node

DAny number of nodes

Explanation:

Here is no explanation for this answer

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What data structure would you mostly likely see in a nonrecursive implementation of a recursive algorithm?

AStack

CQueue

DTrees

Explanation:

Here is no explanation for this answer

Workspace

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