c语言面试时会问到的问题及答案吗英语

Introduction

C language is one of the most widely used programming languages in the world. It was created in 1972 and is still used in many applications today. If you are looking for a job as a programmer or developer, it is likely that you will be asked questions about C language during your job interview. Here are some of the most common C language interview questions and answers to help you prepare for your interview.

Basic Questions

During the C language interview, the interviewer may ask you some basic questions to assess your understanding of the language. Here are some of the basic C language questions and their answers:

1. What is C programming language?

C language is a programming language designed for system programming, embedded systems, and other applications that require low-level memory access.

2. What are the data types in C language?

The basic data types in C language are integer, char, float, and double.

3. What are the storage classes in C language?

The four storage classes in C language are automatic, static, register and external. Automatic variables are stored in the stack, static variables are stored in the data segment, register variables are stored in CPU registers, and external variables are shared between different files in a program.

4. What is a pointer in C language?

A pointer is a variable that stores the memory address of another variable. Pointers are used in C language to manipulate memory and access data structures such as arrays and linked lists.

Advanced Questions

If you pass the basic C language questions, the interviewer may ask you some advanced questions to evaluate your knowledge of the language. Here are some of the advanced C language questions and their answers:

1. What is the difference between a character array and a string?

A character array is a collection of characters stored in contiguous memory locations. Strings are also a collection of characters, but they are terminated by a null character ('').

2. What is the difference between the ++i and i++ operators?

The ++i operator increments the value of i before it is used in an expression, while the i++ operator increments the value of i after it is used in an expression.

3. What is recursion in C language?

Recursion is a process in which a function calls itself. It is used in C language to solve problems that can be divided into smaller sub-problems. Recursion can be very powerful, but it can also lead to stack overflow if not used carefully.

4. What is a structure in C language?

A structure is a user-defined data type in C language that groups related data items. Each data item in a structure is called a member. Structures can be used to represent complex data structures such as trees and graphs.

Conclusion

In conclusion, C language interview questions can range from basic to advanced depending on the position you are interviewing for. It is important to prepare and practice your answers to these questions before the interview to increase your chances of getting the job. Remember to be confident and clear in your responses, and showcase your knowledge and skills to the interviewer.