Which regular expression will match a phone number with a hyphen(s), either with or without an area code, such as 555-5555 or 555-555-5555? a. /[\b\d{3}-\d{3}-\d{4}\b][\b\d{3}-\d{4}\b]/ b. /\b\d{3}-\d{3}-\d{4}\b|\b\d{3}-\d{4}\b/ c. /\b\d+-\d+-\d*\b|\b\d+-\d*\b/ d. /\b\d{3}(-\d{3}-\d{4}\b|\b\d{3}-\d{4})?\b/

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Concept of memory addresses in pointers

The concept of pointers in high-level languages was introduced in C programming. Pointers are simply the variables that are used to store memory addresses of another variable. These special variables are generally used in the languages such as C Programming and C++ Programming, where it allows the programmer to work more deeply with memory and its addresses.