c语言面试经常问到的问题有哪些呢英文-捕鱼10元起上10元下

commonly asked questions in c language interviews

c language is one of the most crucial programming languages, and every programmer has to know it to some degree. job interviews on this topic usually include some common questions that help the interviewer judge a candidate's expertise in the subject. understanding these questions and their answers will help you prepare better for interviews and have a better chance of getting the job you desire. in this article, we will discuss some of the most common questions that interviewers ask about c language.

what are the data types in c language?

one of the fundamental questions that you are likely to face in an interview is about c language's data types. the basic data types in c language are: int, char, float, and double. "int" is used for integer values, "char" for characters, "float" for floating values with single-precision, and "double" for double-precision floating values.

in addition to these basic data types, c language also provides modifiers to these data types. for example, the "short" modifier can be used with "int" to reduce the number of bits used to store an integer. similarly, the "long" modifier can be used to increase the number of bits used to store an integer.

what is the difference between "i " and " i" in c language?

the increment and decrement operators are commonly used in loops, and a question about the difference between the "i " and " i" operators is often asked in interviews. the main difference between the two operators is the order of evaluation. in "i ," the current value of "i" is used first, and then the value of "i" is incremented. on the other hand, in " i," the value of "i" is incremented first, and then the incremented value is used.

for instance, consider the statement "a = i ." in this case, the value of "i" will be assigned to "a" first, and then the increment operation will take place. however, if "a = i," then the increment operation will occur first, and the incremented value will be assigned to "a."

what is a pointer in c language?

another essential topic for a c language interview is pointers. a pointer is a variable that holds the memory address of another variable. in c language, a pointer is declared using an asterisk (*) before the variable name. for example, "int *ptr" declares a pointer variable named "ptr," which points to an integer value.

pointers are pervasive in c language programming and are popularly used for manipulating arrays and dynamically allocating memory. when dealing with pointers, it's common for programmers to accidentally overwrite memory they don't own or access uninitialized memory. a pointer-related question might ask about preventing such errors with debugging tools or programming techniques like using asserts or testing for null pointers.

final words

these are just a few of the many questions that can be asked in a c language interview. answers to these questions won't guarantee that you'll get a job, but they will help you demonstrate expertise in the topic during an interview. preparing for a c language interview requires studying data types, loops, operators, pointers, and memory allocation. by practicing questions and reflecting on your responses, you'll feel more confident and prepared when the time comes to face the interview panel.