# 50+ Postfix to Infix Conversion MCQs with FREE PDF

We have the best collection of the evaluation of a Postfix to Infix Conversion MCQs and answer with FREE PDF. These Postfix to Infix Conversion MCQs will help you to prepare for any competitive exams like: BCA, MCA, GATE, GRE, IES, PSC, UGC NET, DOEACC Exams at all levels – you just have to practice regularly.

## Postfix to Infix Conversion MCQs

a) Stack

b) Queue

d) Heap

a) abc+-de*/

b) (a+b)-d/e*c

c) a-(b+c)*(d/e)

d) abc+*-(d/e)

#### 3. The equivalent infix expression and value for the postfix form 1 2 + 3 * 4 5 * – will be

a) 1 + 2 * 3 – 4 * 5 and -13

b) (2 + 1) * (3 – 4) * 5 and 13

c) 1 + 2 * (3 – 4) * 5 and -11

d) (1 + 2) * 3 – (4 * 5) and -11

Answer: (1 + 2) * 3 – (4 * 5) and -11

a) 19

b) 21

c) -4

d) 25

a) (A+B)*(C-D)

b) +AB*-CD

c) A+*BCD-

d) *+AB-CD

#### 6. Consider the postfix expression 4 5 6 a b 7 8 a c, where a, b, c are operators. Operator a has higher precedence over operators b and c. Operators b and c are right associative. Then, equivalent infix expression is

a) 4 a 5 6 b 7 8 a c

b) 4 a 5 c 6 b 7 a 8

c) 4 b 5 a 6 c 7 a 8

d) 4 a 5 b 6 c 7 a 8

Answer: 4 b 5 a 6 c 7 a 8

a) True

b) False

#### 8. Which of the following is valid reverse polish expression?

a) a op b

b) op a b

c) a b op

d) both op a b and a b op

Answer: a b op

a) 8

b) 6

c) 10

d) 9