Precedence is a very important factor in determining the order of evaluation. If two operators have the same precedence, associativity comes into action.
Workspace
NA
SHSTTON
25
Solv. Corr.
53
Solv. In. Corr.
78
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82 / 93
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Find the output of the following prefix expression
*+2-2 1/-4 2+-5 3 1
Reverse the equation or scan the equation from right to left. Apply the infix-prefix algorithm. Here we have to remember that the exponentiation has order of associativity from right to left. Therefore the stack goes on pushing ^. Therefore resulting in ^^^ABCD.
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NA
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29
Solv. Corr.
33
Solv. In. Corr.
62
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What is the corresponding postfix expression for the given infix expression?
Line at ticket counter is an application of queue whereas conversion of infix to postfix expression, balancing symbols, line at ticket counter are stack applications.
Workspace
NA
SHSTTON
61
Solv. Corr.
26
Solv. In. Corr.
87
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While evaluating a postfix expression, when an operator is encountered, what is the correct operation to be performed?
Apop 2 operands, evaluate them and push the result on to the stack
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