Learn and Master C Programming - Using 'strstr' to search for a substring inside another string

The video tutorial covers the use of string search functions, focusing on STRSTR for finding substrings within strings. It explains the case sensitivity of these functions and demonstrates how to implement and test a word count function that counts occurrences of a word in a string. The tutorial concludes with a summary of the function's applications.

What is the primary purpose of the 'strachn' function discussed in the previous lecture?

• To concatenate two strings

• To replace a character in a string

• To search for a specific character within a string

• To find a substring within a string

What does the 'STR' function return if the substring is not found?

• An error message

• A pointer to the last character

• The length of the string

• A null value

How does the 'STR' function handle case sensitivity?

• It ignores case differences

• It treats uppercase and lowercase as the same

• It is case sensitive

• It converts all characters to lowercase

What is the result of searching for 'man' in the string 'many' using the 'STR' function?

• It returns null

• It returns a pointer to 'n'

• It returns a pointer to 'a'

• It returns a pointer to 'm'

What is the purpose of converting the 'STR' function usage into a separate function?

• To reduce memory usage

• To improve code readability

• To increase execution speed

• To count occurrences of a word in a string

What does the function return if either the string or the word is null?

• A null pointer

• The length of the string

• The length of the word

• Zero

How does the function handle finding multiple occurrences of a word?

• It returns an error if more than one occurrence is found

• It only finds the last occurrence

• It continues searching until the end of the string

• It stops after the first occurrence