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Choose the correct alternatives (more than one may be correct) and write the corresponding letters only:
The following sequence of operations is performed on a stack:
PUSH  (10), PUSH (20), POP, PUSH (10), PUSH (20), POP, POP, POP, PUSH (20), POP
The sequence of values popped out is
  • a)
    20,10,20,10,20
  • b)
    20,20,10,10,20
  • c)
    10,20,20,10,20
  • d)
    20,20,10,20,10
Correct answer is option 'B'. Can you explain this answer?
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Choose the correct alternatives (more than one may be correct) and wri...
Lets try something different when you read the word pop then delete the last pushed element and print it ..now delete the push word which we have already executed ..now go on from left to right and do the same
So, Output will be 20, 20, 10, 10, 20
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Choose the correct alternatives (more than one may be correct) and wri...
Answer:

The given sequence of operations on a stack is as follows:
1. PUSH (10): This operation pushes the value 10 onto the stack.
2. PUSH (20): This operation pushes the value 20 onto the stack.
3. POP: This operation removes the topmost element from the stack, which is 20.
4. PUSH (10): This operation pushes the value 10 onto the stack.
5. PUSH (20): This operation pushes the value 20 onto the stack.
6. POP: This operation removes the topmost element from the stack, which is 20.
7. POP: This operation removes the topmost element from the stack, which is 10.
8. POP: This operation removes the topmost element from the stack, which is 10.
9. PUSH (20): This operation pushes the value 20 onto the stack.
10. POP: This operation removes the topmost element from the stack, which is 20.

The sequence of values popped out from the stack is: 20, 20, 10, 10, 20.

Explanation:

To understand the sequence of values popped out, let's go step by step through the given operations:

1. The first two operations are PUSH (10) and PUSH (20), which push the values 10 and 20 onto the stack, respectively.

2. The third operation is POP, which removes the topmost element from the stack. Since the last element pushed onto the stack was 20, it is the first value popped out.

3. The fourth and fifth operations are PUSH (10) and PUSH (20), which push the values 10 and 20 onto the stack, respectively.

4. The sixth operation is POP, which removes the topmost element from the stack. Since the last element pushed onto the stack was 20, it is the second value popped out.

5. The seventh, eighth, and ninth operations are POP, which remove the topmost elements from the stack. The last three elements pushed onto the stack were 10, 10, and 20, respectively. Therefore, the third, fourth, and fifth values popped out are 10, 10, and 20, respectively.

6. The tenth operation is POP, which removes the topmost element from the stack. Since the last element pushed onto the stack was 20, it is the sixth and final value popped out.

Therefore, the sequence of values popped out from the stack is: 20, 20, 10, 10, 20.

Hence, the correct answer is option B: 20, 20, 10, 10, 20.
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Choose the correct alternatives (more than one may be correct) and write the corresponding letters only:The following sequence of operations is performed on a stack:PUSH (10), PUSH (20), POP, PUSH (10), PUSH (20), POP, POP, POP, PUSH (20), POPThe sequence of values popped out isa)20,10,20,10,20b)20,20,10,10,20c)10,20,20,10,20d)20,20,10,20,10Correct answer is option 'B'. Can you explain this answer?
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