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  • INTERVIEW QUESTIONS DATA STRUCTURE DETAILS
    Question :
    Define and explain ?push? and ?pop??
    Category Data Structure Interview Questions
    Rating (0.4) By 1356 users
    Added on 9/14/2009
    Views 1675
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    Answers:

    The insertion operation is referred to as ?push? and the deletion operation is referred to as ?pop?. Since, insertion and deletion operations are performed at one end of the stack; the elements can only be removed in the opposite order from that in which they were added to the stack. This phenomenon is observed in conjunction with recursive functions.



    #define MAX 10;
    struct stack
    {
    int top;
    int item[MAX];
    };
    typedef struct stack st;
    void push(st *s,int x)
    {
    if(s->top==MAX-1)
    {
    printf("stack is overflow");
    }
    else
    {
    s->top++;
    s->item[s->top]=x;
    }
    }

    int pop(st *s)
    {
    if(s->top==MAX-1)
    {
    printf(stack is under flow");
    }
    else
    {
    return s->item[s->top--];
    }
    }



    Posted by: ansar husain rkgit    

    Contact ansar husain rkgit Contact ansar husain rkgit

    Plase correct in the pop function. The condition s->top==MAX-1 should be raplaced with s->top==0.



    Posted by: jayaram    

    Contact jayaram Contact jayaram

    push and pop are two types of keywords used in stacks.
    push: whenever you want to insert an element in a stack we have to use this push operation.
    pop: whenever we want to delete an element from the stack we have to use this operation.



    Posted by: charishma    

    Contact charishma Contact charishma

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