Answer to Question #176066 in Software Engineering for Sarah

Question

 Suppose you have an empty generic stack. Indicate which of the following instructions will invoke a stack underflow.

 

1.     Push 1

2.     Push 2

3.     Pop

4.     Push 9

5.     Pop

6.     Pop

7.     Pop

8.     Pop

9.     Push 3

Answer 1

1.         Push 1             1

2.         Push 2             2 1

3.         Pop                  1

4.         Push 9             9 1

5.         Pop                  1

6.         Pop             stack underflow