You have been hired to analyze a hacked database. The data is stored in a linked list,constructed from nodes described as follows:struct node{char *fname;char *Iname;struct node *next;};The list has a sentinel node, which is accessible with the already-initialized variablestruct node *sent;The hacker created a series of records where the first name and the last name are the same. Yourgoal is to determine how many hacked records exist.(a) write a function with the protoypeint hackCount(struct node *);whose purpose is to count the number of nodes where the first name is equal to the last name,and return that value.(b) write a function with the prototypetag(struct node*);that accepts a sentinel node, and inserts a new node at the beginning of the list (immediately afterthe sentinel) with fname and Iname each set to the string "hacked"

A function prototype is simply the declaration of a function that specifies function's name,…

You have been hired to analyze a hacked database. The data is stored in a linked lis constructed from nodes described as follows: struct node{ char *fname; char *lname; struct node *next; }; The list has a sentinel node, which is accessible with the already-initialized variable struct node *sent:

You have been hired to analyze a hacked database. The data is stored in a linked lis constructed from nodes described as follows: struct node{ char fname; char lname; struct node next; }; The list has a sentinel node, which is accessible with the already-initialized variable struct node sent:

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Concept explainers

Hash Table

A hash table also called a hash map, is a data structure that maps key-value pairs. The hash table can be used in complex systems to provide fast access and compact storage. A hash table is a structure that stores data in an abstract data type kind of associative array. It keeps data in an array format, with a distinct index value for every data value. If the index of the required data is known, then the data can be accessed very easily.

Question

You have been hired to analyze a hacked database. The data is stored in a linked list,
constructed from nodes described as follows:
struct node{
char *fname;
char *Iname;
struct node *next;
};
The list has a sentinel node, which is accessible with the already-initialized variable
struct node *sent;
The hacker created a series of records where the first name and the last name are the same. Your
goal is to determine how many hacked records exist.
(a) write a function with the protoype
int hackCount(struct node *);
whose purpose is to count the number of nodes where the first name is equal to the last name,
and return that value.
(b) write a function with the prototype
tag(struct node*);
that accepts a sentinel node, and inserts a new node at the beginning of the list (immediately after
the sentinel) with fname and Iname each set to the string "hacked"

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