C INTERVIEW QUESTIONS AND ANSWERS PDF FOR FRESHER
Mar 19, 1) How do you construct an increment statement or decrement statement in C? There are actually two ways you can do this. One is to use the. C interview questions are given with the answers in this website. We have given C interview questions faced by freshers and experienced in real interviews in IT. Commonly Asked C Programming Interview Questions | Set 1. What is the See print “Geeks for Geeks” without using a semicolon for answer. When should we.
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C Interview Questions and Answers for Freshers or Experienced Pdf. These Questions are frequently asked in all Upcoming Entrance Exams and Bank IBPS . Mar 24, C language allows the use of the prefix register in primitive variable declarations. Such variables are called Read Top C programming interview questions and answers. Download C programming interview questions PDF. C Programming Interview Questions - Learn ANSI, GNU and K/R standard of C subject and later they continue based on further discussion and what you answer − .. If you are fresher then interviewer does not expect you will answer very.
What are the types of qualifiers in C? What is const keyword in C?
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What is volatile keyword in C? What is storage class specifier in C language? What are the types of storage class specifiers in C? Can all variables stored in register memory for faster access?
What is auto specifier in C? What is static specifier in C? What is extern specifier in C? What is register specifier in C? What is array in C? What are the different types of array in C language?
How are data stored in 2 dimensional arrays in C? What is string in C language? What is the difference between strcat and strncat functions in C?
Which string function can be used to compare two strings irrespective of the case in C? Can the content of a pointer be a string in C? What is the size of int pointer and char pointer in C? What is function in C? Why are functions used in C language?
What is meant by function declaration, function call and function definition in C?
How can we call a function in C program? What is call by value in C? What is call by reference in C? What is the difference between function declaration and function definition in C?
Can a function be called either with or without arguments in C? When a function can return some value to the calling function in C program?
Is it possible to return more than one value from a function in C program? What can be done if we want to return many values from a function in C program? What is library function or inbuilt function in C programming?
What are the advantages of using library functions over writing our own functions in C program? What does each library function contain in C? All dynamic memory allocation functions are declared in which header file in C? Is exit function declared in which header file in C? What is the difference between header file and precompiled version of header file in C? What is command line argument in C? How will you pass arguments to the main function in C?
What is variable length argument in C? How is variable length argument denoted in C? Variable length argument functions are declared in which header file in C?
Which function is must in a C program? How many times a function can be called in a C program? Is main function necessary in compilation time in C? Or Can we compile a program without main function in C?
Can we execute a program without main function in C? What are the types of functions in C language? What is the output for the below? Which library function is used to check whether character is alphabetic or not? Which library function is used to check whether character is alphanumeric or not? What is buffer manipulation function in C? Which function is used to modify system date in C?
Which function is used to get current system time in C? What is dynamic memory allocation in C? What are the dynamic memory allocation functions in C? What is malloc in C? What is calloc in C?
C Interview questions pdf and answers Freshers experienced.pdf
What is realloc in C What is free in C? What is the difference between malloc and calloc function in C? What happens if you try to allocate memory for the same pointer variable twice using malloc function in C? What happens if you try to free the memory for the same pointer variable twice that was allocated using malloc function in C?
What is the difference between static memory allocation and dynamic memory allocation in C? What is type casting in C? How will you convert string into integer or float in C? How will you convert integer into string in C? What is structure in C? What is member in a C structure? How can we access structure members in C? Can you copy one structure into another in C?
What is the difference between variable, array and structure in C? What are the uses of structures in C? What is array of structure or structure array in C?
Ca we have more than one structure variable declared for one structure in C? What is nested structure in C? How are structure members stored in memory? What is structure padding in C? How to avoid structure padding in C? Why is structure memory size not always same as we expected? What is typedef in C? What is union in C? What is pre-processor and pre-processing in C?
What is pre-processor directive in C? What are pre-processor, compiler, assembler, linker and loader? It also saves you time and effort on having to retype the codes if you have deleted it in the first place. A stack is one form of a data structure. At any particular instance, only the top of the stack is accessible, which means that in order to retrieve data that is stored inside the stack, those on the upper part should be extracted first. When writing programs that will store and retrieve data in a file, it is possible to designate that file into different forms.
A sequential access file is such that data are saved in sequential order: To access a particular data within the sequential access file, data has to be read one data at a time, until the right one is reached.
This refers to the process wherein a variable is assigned an initial value before it is used in the program. Without initialization, a variable would have an unknown value, which can lead to unpredictable outputs when used in computations or other operations. Spaghetti programming refers to codes that tend to get tangled and overlapped throughout the program. This unstructured approach to coding is usually attributed to lack of experience on the part of the programmer.
Spaghetti programing makes a program complex and analyzing the codes difficult, and so must be avoided as much as possible. Source codes are codes that were written by the programmer. It is made up of the commands and other English-like keywords that are supposed to instruct the computer what to do. However, computers would not be able to understand source codes. Therefore, source codes are compiled using a compiler. The resulting outputs are object codes, which are in a format that can be understood by the computer processor.
In C programming, source codes are saved with the file extension. C, while object codes are saved with the file extension. This is a common problem for beginners because quotes are normally part of a printf statement. It is referred to as a terminating null character, and is used primarily to show the end of a string value. It is used to assign a value to a given variable. The modulus operator outputs the remainder of a division. For example: A nested loop is a loop that runs within another loop.
Put it in another sense, you have an inner loop that is inside an outer loop. In this scenario, the inner loop is performed a number of times as specified by the outer loop. For each turn on the outer loop, the inner loop is first performed.
Instead, the operator! Compilers and interpreters often deal with how program codes are executed. Interpreters execute program codes one line at a time, while compilers take the program as a whole and convert it into object code, before executing it.
The key difference here is that in the case of interpreters, a program may encounter syntax errors in the middle of execution, and will stop from there. On the other hand, compilers check the syntax of the entire program and will only proceed to execution when no syntax errors are found.
The char keyword can only hold 1 character value at a time. By creating an array of characters, you can store string values in it. While curly brackets are mainly used to group several lines of codes, it will still work without error if you used it for a single line. Some programmers prefer this method as a way of organizing codes to make it look clearer, especially in conditional statements. Header files are also known as library files.
They contain two essential things: Simply put, commands that you use in C programming are actually functions that are defined from within each header files. Each header file contains a set of functions. Syntax errors are associated with mistakes in the use of a programming language. It maybe a command that was misspelled or a command that must was entered in lowercase mode but was instead entered with an upper case character.
C Programming Interview Questions
A misplaced symbol, or lack of symbol, somewhere within a line of code can also lead to syntax error. Variables and constants may at first look similar in a sense that both are identifiers made up of one character or more characters letters, numbers and a few allowable symbols. Both will also hold a particular value. Values held by a variable can be altered throughout the program, and can be used in most operations and computations. Constants are given values at one time only, placed at the beginning of a program.
This value is not altered in the program. For example, you can assigned a constant named PI and give it a value 3. You can then use it as PI in the program, instead of having to write 3. Arrays contain a number of elements, depending on the size you gave it during variable declaration. Each element is assigned a number from 0 to number of elements To assign or retrieve the value of a particular element, refer to the element number.
Since each header file contains different function definitions and prototype, you would be using only those header files that would contain the functions you will need. Declaring all header files in every program would only increase the overall file size and load of the program, and is not considered a good programming style. When declaring functions, you will decide whether that function would be returning a value or not.
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Compound statements are made up of two or more program statements that are executed together. Compound statements can also be executed within a loop. Before a program can be written, an algorithm has to be created first. An algorithm provides a step by step procedure on how a solution can be derived. It also acts as a blueprint on how a program will start and end, including what process and computations are involved. When storing multiple related data, it is a good idea to use arrays.
This is because arrays are named using only 1 word followed by an element number. With arrays, only 1 name is used, the rest are accessible through the index name grade, grade, grade… grade. This is a common mistake for programmers, often leading to logical errors.
Random numbers are generated in C using the rand command. The most probable reason behind this error is that the header file for that function was not indicated at the top of the program. Header files contain the definition and prototype for functions and commands used in a C program.
Comments are a great way to put some remarks or description in a program. It can serves as a reminder on what the program is all about, or a description on why a certain code or function was placed there in the first place. Comments can be a single line, or can even span several lines.
It can be placed anywhere in the program. Debugging is the process of identifying errors within a program. During program compilation, errors that are found will stop the program from executing completely. At this state, the programmer would look into the possible portions where the error occurred. Debugging ensures the removal of errors, and plays an important role in ensuring that the expected program output is met.
When using this operator, all conditions specified must be TRUE before the next action can be performed. There is no single command or function in C that can check if a number is odd or even. However, this can be accomplished by dividing that number by 2, then checking the remainder. If the remainder is 0, then that number is even, otherwise, it is odd. You can write it in code as:.
This format is used for two things: The number before the decimal point is for the allotted space, in this case it would allot 10 spaces for the output number. If the number of space occupied by the output number is less than 10, addition space characters will be inserted before the actual output number. Program that contains logical errors tend to pass the compilation process, but the resulting output may not be the expected one.
This happens when a wrong formula was inserted into the code, or a wrong sequence of commands was performed.
Syntax errors, on the other hand, deal with incorrect commands that are misspelled or not recognized by the compiler. There are 3 main control structures in programming: Sequence, Selection and Repetition. Sequential control follows a top to bottom flow in executing a program, such that step 1 is first perform, followed by step 2, all the way until the last step is performed.
This also means that not all codes may be executed, and there are alternative flows within. Repetitions are also known as loop structures, and will repeat one or two program statements set by a counter. The is also known as the OR operator in C programming.
For comparing string values, there is another function called strcmp that deals specifically with strings. Preprocessor directives are placed at the beginning of every C program. This is where library files are specified, which would depend on what functions are to be used in the program. Another use of preprocessor directives is the declaration of constants.
Preprocessor directives begin with the symbol. The outcome will be TRUE. Just the same, s! Order of precedence determines which operation must first take place in an operation statement or conditional statement. On the top most level of precedence are the unary operators! Instead, use the strcpy function. The correct statement would be: To get the length of a string value, use the function strlen. For example, if you have a variable named FullName, you can get the length of the stored string value by using this statement: This is because C language is rich in features that make it behave like a high level language while at the same time can interact with hardware using low level methods.
The use of a well structured approach to programming, coupled with English-like words used in functions, makes it act as a high level language. On the other hand, C can directly access memory structures similar to assembly language routines.
Source codes in C are saved with. C file extension. Header files or library files have the. H file extension. Every time a program source code is successfully compiled, it creates an. OBJ object file, and an executable. EXE file. Reserved words are words that are part of the standard C language library.
C Interview questions pdf and answers Freshers experienced.pdf
This means that reserved words have special meaning and therefore cannot be used for purposes other than what it is originally intended for.This is because C language is rich in features that make it behave like a high level language while at the same time can interact with hardware using low level methods.
This happens when a wrong formula was inserted into the code, or a wrong sequence of commands was performed. So, data and function mapping is difficult in C. Apple is Red The reverse of the string is: Arrays contain a number of elements, depending on the size you gave it during variable declaration.
C programming language was designed by Dennis Ritchie in Bells Lab. However, recall that reserved words are express in lowercase, so the C compiler will not interpret this as a reserved word. To get address of a variable 2.
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