Latest CTS Aptitude Question SOLUTION: Q. What is the postfix form of the following prefix expression -A/B*C$DE (A) ABCDE$*/- (B) A-BCDE$*/- (C) ABC$ED*/- (D) A-BCDE$*/

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Q. What is the postfix form of the following prefix expression -A/B*C$DE

(A) ABCDE$*/- (B) A-BCDE$*/-
(C) ABC$ED*/- (D) A-BCDE$*/

Asked In CTS vineysagar (9 years ago)

Unsolved Read Solution (9)

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Read Solution (9) :

sruthi  (9 years ago)

correct answer is option A)

reason-->for prefix to postfix always scan from right to left.
if it is an operand ,push inside stack.
if it is an operator, pop out everything from the stack in the order of:
OPERAND1 OPERAND2 OPERATOR

now here in this eg,(scan from right to left)
1)the stack at first contains E,then D, then $ operator so pop out as DE$
2)now the stack contains DE$,C,*, now since the stack contains an operator *, so pop out as CDE$* bcoz operand1 is DES, operand2 is C and operator is *
3)now again after pushing B and / , the stack will bcum BCDE$*/
4)now again pushing A and - in to stack, since "-" is an operator so after popping out it bcums ABCDE$*/-

hence found)
do keep in mind to always scan from right to left
and while popping out, the format should be OPERAND1 OPERAND2 OPERATOR

Is this solution Helpfull? Yes (19) | No   

Shanmugapriya  (9 years ago)

May be option A
Since there is 5 alphabets $is a symbol
Infix expression can be given as -A/B*C$DE
From the infix expression,
Postfix expression is ABCDE$*/-

Correct if I m wrong

Is this solution Helpfull? Yes (3) | No   

samiksha kapoor  (9 years ago)

Plz always provide correct answer of each question. In the entire site no accurate answer is provided by d admin.its difficult to relie on others answer. Like toddays puzzle plz admin plz provide correct answer of each question on dis site

Is this solution Helpfull? Yes (2) | No   

samiksha kapoor  (9 years ago)

Plz always provide correct answer of each question. In the entire site no accurate answer is provided by d admin.its difficult to relie on others answer. Like toddays puzzle plz admin plz provide correct answer of each question on dis site

Is this solution Helpfull? Yes (1) | No   

jalpan  (9 years ago)

May be Ans is C.

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ARULKUMAR  (9 years ago)

may be D

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Priya Sagare  (9 years ago)

According to me ans is : D

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Atigya  (9 years ago)

Ans is option a
We have to convert it into Postfix notation so start scanning from Left to right.

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Imam khasim shaik  (9 years ago)

First of all convert it into infix form.
Then push the variables into the stack whenever come across operator manipulate it between stack top two elements................

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