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Examination Preparation and Interview questions on Strings for C Programming
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Strings for C Programming MCQ Practice Questions
A string is defined as a contiguous sequence of code units terminated by the first zero code unit (often called the NUL code unit). This means a string cannot contain the zero code unit, as the first one seen marks the end of the string. The length of a string is the number of code units before the zero code unit. The memory occupied by a string is always one more code unit than the length, as space is needed to store the zero terminatorGenerally, the term string means a string where the code unit is of type char, which is exactly 8 bits on all modern machines. C90 defines wide strings which use a code unit of type wchar t, which is 16 or 32 bits on modern machines. This was intended for Unicode but it is increasingly common to use UTF-8 in normal strings for Unicode instead. Strings are passed to functions by passing a pointer to the first code unit. Since char* and w char* are different types, the functions that process wide strings are different than the ones processing normal strings and have different namesString literals (“text” in the C source code) are converted to arrays during compilation. The result is an array of code units containing all the characters plus a trailing zero code unit. In C90 L”text” produces a wide string. A string literal can contain the zero code unit (one way is to put into the source), but this will cause the string to end at that point. The rest of the literal will be placed in memory (with another zero code unit added to the end) but it is impossible to know those code units were translated from the string literal, therefore such source code is not a string literalThese questions will give you basic idea for Examination Preparation and/or interview on Strings for C Programming. Please Note: These questions are only for practice and understanding level of knowledge only. It is not necessary that these questions may or may not appear for examinations and/or interview questionsIn this practice test, because of large amount of questions (around49 questions) some of questions may have repeatedI had to put as 70% pass rate because there may also be wrong answers from my side.
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