- AA data structure that allows elements to be inserted and removed in any order
- BA data structure that allows elements to be inserted and removed from the beginning or end
- CA data structure that allows elements to be inserted and removed from one end only
- DA data structure that allows elements to be inserted and removed from both ends
Stacks - Quiz
- APush and pop
- BInsert and delete
- CEnqueue and dequeue
- DSort and search
- AArray
- BLinked list
- CBinary tree
- DHash table
- AThe stack remains unchanged
- BAn error occurs
- CThe top element is returned with no change to the stack
- D The bottom element is returned with no change to the stack
- AReversing a string
- BUndoing an operation in a text editor
- CEvaluating arithmetic expressions
- D Storing data in a database
- AO(1)
- BO(log n)
- CO(n)
- DO(n log n)
- AIt allows for efficient insertion and deletion at any position
- B It allows for efficient searching and sorting of elements
- C It follows the First-In-First-Out (FIFO) principle
- DIt allows for efficient insertion and deletion at the top end
- ASorting a list of integers
- BFinding the shortest path between two nodes in a graph
- CEvaluating arithmetic expressions
- DGenerating all possible subsets of a set
- AIt can only store a limited number of elements
- B It is not efficient for searching or sorting elements
- CIt requires a lot of memory to implement
- DIt can lead to stack overflow errors if the stack becomes too large
- A Checking if a sentence is a palindrome
- BSolving a maze
- CEvaluating the postfix notation of an arithmetic expression
- DStoring data in a database
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Stacks - Quiz
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- A. A data structure that allows elements to be inserted and removed in any order
- B. A data structure that allows elements to be inserted and removed from the beginning or end
- C. A data structure that allows elements to be inserted and removed from one end only
- D. A data structure that allows elements to be inserted and removed from both ends
Remarks:
Explanation:
Answer: c) A data structure that allows elements to be inserted and removed from one end only
Explanation: A stack is a data structure that follows the Last-In-First-Out (LIFO) principle, meaning that the element that is inserted last will be the first to be removed. It allows elements to be inserted and removed from the top end only.
- A. Push and pop
- B. Insert and delete
- C. Enqueue and dequeue
- D. Sort and search
Remarks:
Explanation:
Answer: a) Push and pop
Explanation: The two primary operations on a stack are push, which adds an element to the top of the stack, and pop, which removes the top element from the stack.
- A. Array
- B. Linked list
- C. Binary tree
- D. Hash table
Remarks:
Explanation:
Answer: b) Linked list
Explanation: A linked list is commonly used to implement a stack since it allows for efficient insertion and deletion at the beginning of the list.
- A. The stack remains unchanged
- B. An error occurs
- C. The top element is returned with no change to the stack
- D. The bottom element is returned with no change to the stack
Remarks:
Explanation:
Answer: b) An error occurs
Explanation: Popping an element from an empty stack is considered an error since there is no element to remove.
- A. Reversing a string
- B. Undoing an operation in a text editor
- C. Evaluating arithmetic expressions
- D. Storing data in a database
Remarks:
Explanation:
Answer: d) Storing data in a database
Explanation: While a stack can be used to store data temporarily in memory, it is not commonly used to store data in a database.
- A. O(1)
- B. O(log n)
- C. O(n)
- D. O(n log n)
Remarks:
Explanation:
Answer: a) O(1)
Explanation: The push and pop operations on a stack implemented using an array have a time complexity of O(1), since they simply involve adding or removing an element from the end of the array.
- A. It allows for efficient insertion and deletion at any position
- B. It allows for efficient searching and sorting of elements
- C. It follows the First-In-First-Out (FIFO) principle
- D. It allows for efficient insertion and deletion at the top end
Remarks:
Explanation:
Answer: d) It allows for efficient insertion and deletion at the top end
Explanation: The primary advantage of using a stack is that it allows for efficient insertion and deletion at the top end, making it useful for applications that require temporary storage of data.
- A. Sorting a list of integers
- B. Finding the shortest path between two nodes in a graph
- C. Evaluating arithmetic expressions
- D. Generating all possible subsets of a set
Remarks:
Explanation:
Answer: c) Evaluating arithmetic expressions
Explanation: A stack can be used to evaluate arithmetic expressions in postfix notation, which involves pushing operands onto the stack and popping operators from the stack when they are encountered.
- A. It can only store a limited number of elements
- B. It is not efficient for searching or sorting elements
- C. It requires a lot of memory to implement
- D. It can lead to stack overflow errors if the stack becomes too large
Remarks:
Explanation:
Answer: d) It can lead to stack overflow errors if the stack becomes too large
Explanation: One potential disadvantage of using a stack is that it can lead to stack overflow errors if the stack becomes too large and exceeds the available memory.
- A. Checking if a sentence is a palindrome
- B. Solving a maze
- C. Evaluating the postfix notation of an arithmetic expression
- D. Storing data in a database
Remarks:
Explanation:
Answer: a) Checking if a sentence is a palindrome
Explanation: A stack can be used to check if a sentence is a palindrome by pushing the first half of the sentence onto the stack and then comparing the remaining half to the elements popped from the stack.