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Data Structures :: Stacks

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NA
SHSTTON
109
Solv. Corr.
168
Solv. In. Corr.
277
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0 M:55 S
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Choose the correct option.

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

Answer: Option D

Explanation:

Here is no explanation for this answer

Workspace

NA
SHSTTON
130
Solv. Corr.
89
Solv. In. Corr.
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

Answer: Option A

Explanation:

Here is no explanation for this answer

Workspace

NA
SHSTTON
105
Solv. Corr.
64
Solv. In. Corr.
169
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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$*/

Answer: Option A

Explanation:

Here is no explanation for this answer

Workspace

NA
SHSTTON
40
Solv. Corr.
118
Solv. In. Corr.
158
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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

Answer: Option C

Explanation:

Here is no explanation for this answer

Workspace

NA
SHSTTON
172
Solv. Corr.
48
Solv. In. Corr.
220
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The data structure required to evaluate a postfix expression is


Aqueue

Bstack

Carray

Dlinked-list

Answer: Option B

Explanation:

Here is no explanation for this answer

Workspace

NA
SHSTTON
145
Solv. Corr.
54
Solv. In. Corr.
199
Attempted
0 M:3 S
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6 / 93

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


AStack

BQueue

CTree

DArray

Answer: Option A

Explanation:

Here is no explanation for this answer

Workspace

NA
SHSTTON
123
Solv. Corr.
72
Solv. In. Corr.
195
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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

Answer: Option C

Explanation:

Here is no explanation for this answer

Workspace

NA
SHSTTON
76
Solv. Corr.
76
Solv. In. Corr.
152
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8 / 93

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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/

Answer: Option A

Explanation:

Here is no explanation for this answer

Workspace

NA
SHSTTON
46
Solv. Corr.
136
Solv. In. Corr.
182
Attempted
0 M:0 S
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9 / 93

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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

Answer: Option C

Explanation:

Here is no explanation for this answer

Workspace

NA
SHSTTON
129
Solv. Corr.
45
Solv. In. Corr.
174
Attempted
0 M:0 S
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What data structure would you mostly likely see in a nonrecursive implementation of a recursive algorithm?


AStack

BLinked list

CQueue

DTrees

Answer: Option A

Explanation:

Here is no explanation for this answer

Workspace

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