CSE121

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Questions and Answers

What does the 'NULL' pointer represent in C programming?

It represents a pointer that points to the beginning of the memory
It represents a pointer that points to the end of the memory
It represents a pointer that points to a specific memory location
It represents a pointer that does not point to any memory location (correct)

What is the purpose of the 'gets()' function in C programming?

To perform arithmetic operations on integers
To read a string from the standard input and store it in a character array (correct)
To print the contents of an array
To allocate memory for a new array

What is the purpose of the '*' (Dereference operator) in C programming?

It is used to find the memory address of a variable
It is used to access the value pointed to by a pointer (correct)
It is used to perform multiplication operations
It is used to declare a pointer variable

What does the 'end of string' in a character array in C programming indicate?

<p>It indicates the termination of the string (A)</p> Signup and view all the answers

What happens if the keyboard input string in C programming is too big (>= 8 characters) for the character array?

<p>An error will occur (B)</p> Signup and view all the answers

Study Notes

Pointers and Strings in C

NULL pointer represents a null or empty pointer, indicating that it does not point to a valid memory location.

Input and Output in C

The gets() function is used to read a line of text from the standard input (usually the keyboard) and store it in a character array.

Operators in C

The * (Dereference operator) is used to access the value stored at a memory address held by a pointer.

Strings in C

The 'end of string' in a character array is indicated by a null character (\0), which marks the end of the string.

Input and Buffer Overflow in C

If the keyboard input string is too big (≥ 8 characters) for the character array, it can lead to a buffer overflow, causing the extra characters to overwrite adjacent memory locations, potentially causing errors or security vulnerabilities.

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Description

Test your knowledge of computer programming with this quiz for CSE121: Computer Programming. Covering topics such as algorithms, data structures, and problem-solving, this quiz is designed for 1st-year Computer and Systems Engineering students at Zagazig University.