Graphics and Bit Manipulation

Problems involving bit manipulation and computer graphics are common in interviews. Bit manipulation problems are more common than graphics problems. Depending on the type of programming, programmer may not use bit operations often, so refamiliarize himself/herself with the bit operators and their use before the interview. Computer graphics involves drawing with pixels. Programmer always needs to check for rounding errors, gaps, and special cases in computer graphics. Most computer languages have facilities to allow programmers access to the individual bits of a variable. Bit operators may appear more frequently in interviews than in day‐to‐day programming, so they merit a review. To work with bit operators, he/she needs to start thinking on the levels of bits. Most languages include a series of bitwise operators, operators that affect the individual bits of an integer value. C and C++ bitwise operators share the same syntax and behaviors.