Computer Science Engineering (CSE) Exam > Computer Science Engineering (CSE) Questions > Stacks cannot be used toa)Evaluate an arithme...
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Stacks cannot be used to
- a)Evaluate an arithmetic expression in postfix form.
- b)Implement recursion.
- c)Convert a given arithmetic expression in infix form to its equivalent postfix form.
- d)Allocate resources (like CPU) by the operating system.
Correct answer is option 'D'. Can you explain this answer?
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Verified Answer
Stacks cannot be used toa)Evaluate an arithmetic expression in postfix...
Stacks are used to evaluate postfix expressions, to store data in case of recursion and to convert infix forms to postfix forms.
However, resource allocation can’t be done using stack. Scheduling algorithms are used for allocation of CPU time
However, resource allocation can’t be done using stack. Scheduling algorithms are used for allocation of CPU time
Most Upvoted Answer
Stacks cannot be used toa)Evaluate an arithmetic expression in postfix...
Explanation:
Stacks are data structures that follow the Last-In-First-Out (LIFO) principle. They are commonly used in programming to store and retrieve data elements. However, there are certain tasks that stacks cannot perform efficiently or at all.
Allocate Resources
One of the tasks that stacks cannot perform is allocating resources like CPU by the operating system. This is because resource allocation requires complex algorithms that cannot be implemented using a simple stack.
Evaluate Arithmetic Expression
Stacks are commonly used to evaluate arithmetic expressions in postfix (also known as Reverse Polish Notation) form. In this form, the operators come after the operands. For example, the expression "2 + 3" in postfix form would be written as "2 3 +". Stacks are used to store the operands and perform the operations in the correct order.
Convert Infix to Postfix
Stacks can also be used to convert a given arithmetic expression in infix form to its equivalent postfix form. This is done using the Shunting Yard algorithm, which uses two stacks to convert the expression. The first stack is used to hold operators, while the second stack is used to hold operands.
Implement Recursion
Another common use of stacks in programming is to implement recursion. In a recursive function, the function calls itself repeatedly until a base case is reached. Each function call is added to the stack, and when the base case is reached, the function calls are popped off the stack in reverse order.
Conclusion:
In conclusion, while stacks are a useful data structure in programming, they have limitations. They cannot be used to allocate resources like CPU by the operating system. However, they can be used to evaluate arithmetic expressions, convert infix to postfix, and implement recursion.
Stacks are data structures that follow the Last-In-First-Out (LIFO) principle. They are commonly used in programming to store and retrieve data elements. However, there are certain tasks that stacks cannot perform efficiently or at all.
Allocate Resources
One of the tasks that stacks cannot perform is allocating resources like CPU by the operating system. This is because resource allocation requires complex algorithms that cannot be implemented using a simple stack.
Evaluate Arithmetic Expression
Stacks are commonly used to evaluate arithmetic expressions in postfix (also known as Reverse Polish Notation) form. In this form, the operators come after the operands. For example, the expression "2 + 3" in postfix form would be written as "2 3 +". Stacks are used to store the operands and perform the operations in the correct order.
Convert Infix to Postfix
Stacks can also be used to convert a given arithmetic expression in infix form to its equivalent postfix form. This is done using the Shunting Yard algorithm, which uses two stacks to convert the expression. The first stack is used to hold operators, while the second stack is used to hold operands.
Implement Recursion
Another common use of stacks in programming is to implement recursion. In a recursive function, the function calls itself repeatedly until a base case is reached. Each function call is added to the stack, and when the base case is reached, the function calls are popped off the stack in reverse order.
Conclusion:
In conclusion, while stacks are a useful data structure in programming, they have limitations. They cannot be used to allocate resources like CPU by the operating system. However, they can be used to evaluate arithmetic expressions, convert infix to postfix, and implement recursion.
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Stacks cannot be used toa)Evaluate an arithmetic expression in postfix form.b)Implement recursion.c)Convert a given arithmetic expression in infix form to its equivalent postfix form.d)Allocate resources (like CPU) by the operating system.Correct answer is option 'D'. Can you explain this answer?
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