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Stacks Questions

Home > Technical Aptitude > Data Structures > Stacks > General Questions
NA
SHSTTON
325
Solv. Corr.
130
Solv. In. Corr.
455
Attempted
0 M:10 S
Avg. Time

21 / 93

Choose the correct option.

The postfix form of the expression (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:

by using stack method im getting option C as answer

                            stack         postfix

(                          (

A                          (                A

+                          (+             A

B                           (+            AB

)                           (+)           AB

                                            AB+

*                          *              AB+

(                          *(             AB+

C                         *(             AB+C

*                         *(*           AB+C

D                         *(*           AB+CD

-                          *(*-          AB+CD

                           *(-            AB+CD*

E                         *(-            AB+CD*E

)                          *(-)          AB+CD*E

                             *            AB+CD*E-

*                           **           AB+CD*E-

                            *              AB+CD*E-*

F                          *               AB+CD*E-*F

/                           */             AB+CD*E-*F

                             /              AB+CD*E-*F*

G                           /               AB+CD*E-*F*G

                                              AB+CD*E-*F*G/               

              

Workspace

NA
SHSTTON
404
Solv. Corr.
114
Solv. In. Corr.
518
Attempted
0 M:13 S
Avg. Time

22 / 93

Choose the correct option.

he 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
239
Solv. Corr.
136
Solv. In. Corr.
375
Attempted
0 M:35 S
Avg. Time

23 / 93

Choose the correct option.

Let ' s' be a stack and push and pop be functions implementing the Insertion and Deletion operations in a Stack. push takes 2 parameters: the stack and the element to be inserted , pop takes a single parameter: the stack. What will be the contents of the stack after the following operations: push(s,A), push(s,B), push(s,C), pop(s), pop(s), push(s, D), push (s, E), pop(s) ?


AA D

BD E

CC E

DA E

Answer: Option A

Explanation:

  • B DE

Workspace

NA
SHSTTON
142
Solv. Corr.
151
Solv. In. Corr.
293
Attempted
0 M:0 S
Avg. Time

24 / 93

Choose the correct option.

Minimum how many stacks are needed to implement a queue ?


ACannot be implemented

B1

C2

D3

Answer: Option C

Explanation:

Because The Queue need two pointer for The front and The Rear 

and Stack is one pointer is  Top 

Workspace

NA
SHSTTON
184
Solv. Corr.
96
Solv. In. Corr.
280
Attempted
0 M:0 S
Avg. Time

25 / 93

Choose the correct option.

The following name does not relate to stacks


AFIFO lists

BLIFO list

CPiles

DPush-down lists

Answer: Option A

Explanation:

Here is no explanation for this answer

Workspace

NA
SHSTTON
453
Solv. Corr.
78
Solv. In. Corr.
531
Attempted
0 M:1 S
Avg. Time

26 / 93

Choose the correct option.

The term "push" and "pop" is related to the


AArray

BLists

Cstacks

Dall of above

Answer: Option C

Explanation:

Here is no explanation for this answer

Workspace

NA
SHSTTON
101
Solv. Corr.
62
Solv. In. Corr.
163
Attempted
0 M:0 S
Avg. Time

27 / 93

Choose the correct option.

The post fix form of A & B * C-D + E/F/ (G + H) is


AAB $ C * D - EF/GH +I+

BAB$* C- D + EF I GH I+

CAB $ C + D - EF I GH I - +

DAB $ C - D * EF I GH I ++

Answer: Option A

Explanation:

Here is no explanation for this answer

Workspace

NA
SHSTTON
94
Solv. Corr.
42
Solv. In. Corr.
136
Attempted
1 M:7 S
Avg. Time

28 / 93

Choose the correct option.

The post fix form of A-BI (C* D $ E) is


AABCDE $ * 1-

BABIC* DE$

CABCDE $ -/*

DABCDE /-*$

Answer: Option A

Explanation:

Here is no explanation for this answer

Workspace

NA
SHSTTON
254
Solv. Corr.
142
Solv. In. Corr.
396
Attempted
0 M:15 S
Avg. Time

29 / 93

Choose the correct option.

The prefix of (A+ B) * (C-D) is


A+-AB*(C-D)

B* +-ABCD

C* +AB-CD

D*AB+ CD

Answer: Option C

Explanation:

Here is no explanation for this answer

Workspace

NA
SHSTTON
101
Solv. Corr.
47
Solv. In. Corr.
148
Attempted
0 M:0 S
Avg. Time

30 / 93

Choose the correct option.

The post fix form of the following prefix * +AB-CD is


AAB+ CD-*

BABC+*-

CAB+* CD-

DAB+* CD-

Answer: Option A

Explanation:

Here is no explanation for this answer

Workspace

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