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# Stacks Questions

Home > Technical Aptitude > Data Structures > Stacks > General Questions
NA
SHSTTON
322
Solv. Corr.
428
Solv. In. Corr.
750
Attempted
0 M:37 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
442
Solv. Corr.
265
Solv. In. Corr.
707
Attempted
1 M:5 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
235
Solv. Corr.
213
Solv. In. Corr.
448
Attempted
1 M:42 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
96
Solv. Corr.
262
Solv. In. Corr.
358
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
559
Solv. Corr.
169
Solv. In. Corr.
728
Attempted
0 M:10 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
483
Solv. Corr.
144
Solv. In. Corr.
627
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
289
Solv. Corr.
163
Solv. In. Corr.
452
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
198
Solv. Corr.
227
Solv. In. Corr.
425
Attempted
0 M:25 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
163
Solv. Corr.
411
Solv. In. Corr.
574
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
359
Solv. Corr.
136
Solv. In. Corr.
495
Attempted
0 M:11 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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