**Stack Operations and Value Determination**Assume we have the following stack operations, where the numeric values are pushed onto the stack and popped off into variable (or register) `r1`:```push(42)push(15)r1 = pop()push(9)push(20)r1 = pop()r1 = pop()r1 = pop()push(15)```**Question:**What is the value of `r1` after the operations complete?**Options:**- A. 9- B. 15- C. 20- D. 42**Explanation:**1. **push(42)**: The stack is now [42].2. **push(15)**: The stack becomes [42, 15].3. **r1 = pop()**: Pop the top value (15), so `r1 = 15`. The stack is now [42].4. **push(9)**: The stack updates to [42, 9].5. **push(20)**: The stack updates to [42, 9, 20].6. **r1 = pop()**: Pop the top value (20), so `r1 = 20`. The stack is now [42, 9].7. **r1 = pop()**: Pop the top value (9), so `r1 = 9`. The stack is now [42].8. **r1 = pop()**: Pop the top value (42), so `r1 = 42`. The stack is now empty [].9. **push(15)**: The stack updates to [15].After all operations, the final value of `r1` is 42.**Correct Answer: D. 42**

Stack is linear data structure. Stack works in LIFO order that means element which is inserted first…

Assume we have the following stack operations, where the numeric values are pushed onto the stack and popped off into variable (or register) r1: push (42) push (15) r1 = pop() push (9) push (20) r1 = pop() r1= pop() r1 = pop() push (15) What is the value of r1 after the operations complete? O A. 9 OB. 15 OC. 20 O D. 42

Assume we have the following stack operations, where the numeric values are pushed onto the stack and popped off into variable (or register) r1: push (42) push (15) r1 = pop() push (9) push (20) r1 = pop() r1= pop() r1 = pop() push (15) What is the value of r1 after the operations complete? O A. 9 OB. 15 OC. 20 O D. 42

C++ Programming: From Problem Analysis to Program Design

8th Edition

ISBN:9781337102087

Author:D. S. Malik

Publisher:D. S. Malik

Chapter18: Stacks And Queues

Section: Chapter Questions

Problem 3PE

See similar textbooks

Related questions

Q: 10) When the subroutine is called_ A) PC is pulled from the stack B) SP is incremented by 2…

A: 10) SP is incremented by 2 The decision instruction is of 2 words, the primary word is that the…

Q: Determine the stack's performance when permitted to be itself.

A: If a stack data structure is permitted to be itself, that is, no operations are performed on it, it…

Q: In Python, 1. Elements in a Quene or Stack are removed in the order in which they were…

A: Given: To choose the correct option.

Q: Consider the following sequence of stack operations: push(d), push(h), pop(), push(f), push(s),…

A: push operation inserts element at top of stack whereas pop operation removes element from top of…

Q: The following function is written incorrectly: int factorial (int n) { if (n == 0) return 1; return…

A: To find the result of calling a given function with large integer.

Q: Consider the following postfix expression. Use stack to evaluate it. 6 3 2 4 + - * The value of the…

A: C. -18

Q: Consider the following pseudocode: declare a stack of characters while ( there are more characters…

A: This question is related to the stack and queue and their operations. Stack: It is a linear data…

Q: What are the operations that can be performed on a stack?

A: In this question we need to explain operations that can be performed on a stack.

Q: Draw the sequence of stack configurations in the evaluation of the following postfix expression:…

A: 3 5 5 * + 4 7 + / 6 * Stack configuration 3 is number push it to stack stack->3 5 is number…

Q: Q-6: A main program consists of two procedures begins at memory address 7000H. Procedure-1 begins at…

A: Execution starts at the main program Calling Procedure-1 after saving the return address “7041” to…

Q: Evaluating postfix expressions (example) » 78 + 3 2 + / • Note that: for division operation, when…

A: Hello Student. Greetings from my side. Hope you are doing great. I will try my best to answer your…

Question

**Stack Operations and Value Determination**

Assume we have the following stack operations, where the numeric values are pushed onto the stack and popped off into variable (or register) `r1`:

```
push(42)
push(15)
r1 = pop()
push(9)
push(20)
r1 = pop()
r1 = pop()
r1 = pop()
push(15)
```

**Question:**
What is the value of `r1` after the operations complete?

**Options:**
- A. 9
- B. 15
- C. 20
- D. 42

**Explanation:**

1. **push(42)**: The stack is now [42].
2. **push(15)**: The stack becomes [42, 15].
3. **r1 = pop()**: Pop the top value (15), so `r1 = 15`. The stack is now [42].
4. **push(9)**: The stack updates to [42, 9].
5. **push(20)**: The stack updates to [42, 9, 20].
6. **r1 = pop()**: Pop the top value (20), so `r1 = 20`. The stack is now [42, 9].
7. **r1 = pop()**: Pop the top value (9), so `r1 = 9`. The stack is now [42].
8. **r1 = pop()**: Pop the top value (42), so `r1 = 42`. The stack is now empty [].
9. **push(15)**: The stack updates to [15].

After all operations, the final value of `r1` is 42.

**Correct Answer: D. 42**

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

This is a popular solution!

SEE SOLUTION Check out a sample Q&A here

Problem Description :

VIEW

Solution :

VIEW

Trending now

This is a popular solution!

Step by step

Solved in 2 steps

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, computer-science and related others by exploring similar questions and additional content below.

Similar questions

(List maintenance) a. Write a complete C++ program that can be used to update an ordered list of numbers. Use the list of numbers shown in Figure 7.13 to test that your program is working correctly. b. Test the program you wrote for Exercise 4a, using a new part number of 86 with the list of numbers shown in Figure 7.13. This test should place this new code at the beginning of the existing list. c. Test the program you wrote for Exercise 4a, using a part number of 200 with the list of numbers shown in Figure 7.13. This test should place this new part number at the end of the existing list
How is an array stored in main memory? How is a linked list stored in main memory? What are their comparative advantages and disadvantages? Give examples of data that would be best stored as an array and as a linked list.
(Data processing) A bank’s customer records are to be stored in a file and read into a set of arrays so that a customer’s record can be accessed randomly by account number. Create the file by entering five customer records, with each record consisting of an integer account number (starting with account number 1000), a first name (maximum of 10 characters), a last name (maximum of 15 characters), and a double-precision number for the account balance. After the file is created, write a C++ program that requests a user-input account number and displays the corresponding name and account balance from the file.
15. Write a program to implement and test the algorithm that you designed for Exercise 15 of Chapter 1. (You may assume that the value of . In your program, declare a named constant PI to store this value.)
(Numerical) Write a program that tests the effectiveness of the rand() library function. Start by initializing 10 counters to 0, and then generate a large number of pseudorandom integers between 0 and 9. Each time a 0 occurs, increment the variable you have designated as the zero counter; when a 1 occurs, increment the counter variable that’s keeping count of the 1s that occur; and so on. Finally, display the number of 0s, 1s, 2s, and so on that occurred and the percentage of the time they occurred.
Mark the following statements as true or false. A double type is an example of a simple data type. (1) A one-dimensional array is an example of a structured data type. (1) The size of an array is determined at compile time. (1,6) Given the declaration: int list[10]; the statement: list[5] - list[3] * list[2]; updates the content of the fifth component of the array list. (2) If an array index goes out of bounds, the program always terminates in an error. (3) The only aggregate operations allowable on int arrays are the increment and decrement operations. (5) Arrays can be passed as parameters to a function either by value or by reference. (6) A function can return a value of type array. (6) In C++, some aggregate operations are allowed for strings. (11,12,13) The declaration: char name [16] = "John K. Miller"; declares name to be an array of 15 characters because the string "John K. Miller" has only 14 characters. (11) The declaration: char str = "Sunny Day"; declares str to be a string of an unspecified length. (11) As parameters, two-dimensional arrays are passed either by value or by reference. (15,16)
(Data processing) Your professor has asked you to write a C++ program that determines grades at the end of the semester. For each student, identified by an integer number between 1 and 60, four exam grades must be kept, and two final grade averages must be computed. The first grade average is simply the average of all four grades. The second grade average is computed by weighting the four grades as follows: The first grade gets a weight of 0.2, the second grade gets a weight of 0.3, the third grade gets a weight of 0.3, and the fourth grade gets a weight of 0.2. That is, the final grade is computed as follows: 0.2grade1+0.3grade2+0.3grade3+0.2grade4 Using this information, construct a 60-by-7 two-dimensional array, in which the first column is used for the student number, the next four columns for the grades, and the last two columns for the computed final grades. The program’s output should be a display of the data in the completed array. For testing purposes, the professor has provided the following data:
(Conversion) a. Write a C++ program to convert meters to feet. The program should request the starting meter value, the number of conversions to be made, and the increment between metric values. The display should have appropriate headings and list the meters and the corresponding feet value. If the number of iterations is greater than 10, have your program substitute a default increment of 10. Use the relationship that 1 meter = 3.281 feet. b. Run the program written in Exercise 6a on a computer. Verify that your program begins at the correct starting meter value and contains the exact number of conversions specified in your input data. c. Modify the program written in Exercise 6a to request the starting meter value, the ending meter value, and the increment. Instead of the condition checking for a fixed count, the condition checks for the ending meter value. If the number of iterations is greater than 20, have your program substitute a default increment of (ending value - starting value) / 19.
(Statistics) a. Write a C++ program that reads a list of double-precision grades from the keyboard into an array named grade. The grades are to be counted as they’re read, and entry is to be terminated when a negative value has been entered. After all grades have been input, your program should find and display the sum and average of the grades. The grades should then be listed with an asterisk (*) placed in front of each grade that’s below the average. b. Extend the program written for Exercise 1a to display each grade and its letter equivalent, using the following scale: Between90and100=AGreaterthanorequalto80andlessthan90=BGreaterthanorequalto70andlessthan80=CGreaterthanorequalto60andlessthan70=DLessthan60=F
(For thought) a. What’s an advantage of namespaces? b. What’s a possible disadvantage of namespaces?