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# Stacks Questions

Home > Technical Aptitude > Data Structures > Stacks > General Questions
NA
SHSTTON
383
Solv. Corr.
524
Solv. In. Corr.
907
Attempted
0 M:30 S
Avg. Time

1 / 93

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

Explanation:

Here is no explanation for this answer

Workspace

NA
SHSTTON
645
Solv. Corr.
355
Solv. In. Corr.
1000
Attempted
0 M:49 S
Avg. Time

2 / 93

Choose the correct option.

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

Workspace

NA
SHSTTON
387
Solv. Corr.
352
Solv. In. Corr.
739
Attempted
1 M:41 S
Avg. Time

3 / 93

Choose the correct option.

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
SHSTTON
113
Solv. Corr.
297
Solv. In. Corr.
410
Attempted
0 M:11 S
Avg. Time

4 / 93

Choose the correct option.

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

Workspace

NA
SHSTTON
820
Solv. Corr.
282
Solv. In. Corr.
1102
Attempted
0 M:9 S
Avg. Time

5 / 93

Choose the correct option.

The data structure required to evaluate a postfix expression is

Aqueue

Bstack

Carray

Explanation:

Here is no explanation for this answer

Workspace

NA
SHSTTON
582
Solv. Corr.
157
Solv. In. Corr.
739
Attempted
0 M:3 S
Avg. Time

6 / 93

Choose the correct option.

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
335
Solv. Corr.
187
Solv. In. Corr.
522
Attempted
0 M:0 S
Avg. Time

7 / 93

Choose the correct option.

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

Workspace

NA
SHSTTON
338
Solv. Corr.
345
Solv. In. Corr.
683
Attempted
0 M:54 S
Avg. Time

8 / 93

Choose the correct option.

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:

The correct answer is option B i.e AB+CD*E-*F*G/

Workspace

NA
SHSTTON
202
Solv. Corr.
479
Solv. In. Corr.
681
Attempted
0 M:8 S
Avg. Time

9 / 93

Choose the correct option.

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

Workspace

NA
SHSTTON
507
Solv. Corr.
276
Solv. In. Corr.
783
Attempted
0 M:22 S
Avg. Time

10 / 93

Choose the correct option.

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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## Why Data Structures Stacks?

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