Answer Posted / brindha

Char* const p -> Here pointer P is a const pointer, which
means that this pointer can point to only one memory
location. eg. char* const p = &arr;
p++ ; -> This is invalid


const char* p -> this indicates that the data pointed by
the pointer p is constant & the value in that address
cannot be modified. eg. const char* p = 'a';
*p = 'b'; -> This is invalid

why to assign a pointer to null sometimes??how can a pointer we declare get assigned with a garbage value by default???

1502

why use functions a) writing functions avoids rewriting the same code over and over b) using functions it becomes easier to write programs and keep track of what they are doing c) a & b d) none of the above

644

What is volatile keyword in c?

567

What is the difference between declaring a variable and defining a variable?

708

What does %p mean?

576

Write a program to maintain student’s record. Record should not be available to any unauthorized user. There are three (3) categories of users. Each user has its own type. It depends upon user’s type that which kind of operations user can perform. Their types and options are mentioned below: 1. Admin (Search Record [by Reg. No or Name], View All Records, Insert New Record, Modify Existing Record) 2. Super Admin (Search Record [by Reg. No or Name], View All Records, Insert New Record, Modify Existing Record, Delete Single Record) 3. Guest (Search Record [by Reg. No or Name], View All Records) When first time program runs, it asks to create accounts. Each user type has only 1 account (which means that there can be maximum 3 accounts). In account creation, following options are required: Login Name: <6-10 alphabets long, should be unique> Password: <6-10 alphabets long, should not display characters when user type> Confirm Password: Account Type: Login Name, Password and Account Type should be stored in a separate file in encrypted form. (Encryption means that actual information should be changed and Decryption means that Encrypted information is changed back to the actual information) If any of the above mentioned requirement(s) does not meet then point out mistake and ask user to specify information again. When Program is launched with already created accounts, it will ask for user name and password to authenticate. On successful authentication, give options according to the user’s type.

1499

What is the difference between #include