History of C Programming Language

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Who proposed the C language at Bell Laboratories in 1972?

Dennis M. Ritchie (correct)

Ken Thompson

Martin Richard

Brian Kernighan

Which programming language is most frequently associated with UNIX?

C (correct)

Java

Python

HTML

What was one of C's earlier forms before it evolved from BCPL?

HTML

Java

Python

The B language (correct)

Which book, published in 1978, was the first book on C programming?

The C Programming Language by Brian Kernighan and Dennis Ritchie Signup and view all the answers

What was the goal of the ANSI committee established in 1983 regarding the C language?

Produce an unambiguous and machine independent definition of the language C Signup and view all the answers

What comes after local declarations in the main function?

Statements Signup and view all the answers

What is the purpose of a return function in a program?

To return a value when specified Signup and view all the answers

Which file type is NOT generated during the compilation process of a C program?

.txt Signup and view all the answers

What does the Linker do in the compilation process of a C program?

Link object files to library functions Signup and view all the answers

Which component stores the address of the next instructions to be executed by the CPU?

Program Counter Signup and view all the answers

What is the purpose of the 'ceil()' function in C Math?

Rounds up the given number to the nearest integer Signup and view all the answers

Which keyword in C language is used to define a loop?

Break Signup and view all the answers

What is the purpose of identifiers in C programming?

Name variables and other program elements Signup and view all the answers

Why is it important to declare variables in C programming?

To inform the compiler about variable data types Signup and view all the answers

What is the purpose of the 'pow()' function in C Math?

Returns the power of a given number Signup and view all the answers

What is the range of the 'Short int' basic data type in 'C'?

-32768 to 32767 Signup and view all the answers

Which data type is used in 'C' to store a set of data values?

Arrays Signup and view all the answers

How are string constants represented in 'C'?

As a sequence of zero or more characters surrounded by double quotes Signup and view all the answers

Which constant type is used to associate constant values with names in 'C'?

Enumeration constant Signup and view all the answers

What is the main purpose of declaring an unsigned constant in 'C'?

To increase the range of storage Signup and view all the answers

What is the purpose of the preprocessor section in a C program?

Include necessary header files Signup and view all the answers

Which organization established the ANSI C standard?

ANSI Signup and view all the answers

What is the significance of the main() function in a C program?

Is the first function executed by the computer Signup and view all the answers

What is a key feature of C programming that makes it highly portable?

Code written in one machine can be moved to another Signup and view all the answers

Which section of a C program usually includes declarations for global variables?

Preprocessor section Signup and view all the answers

What is a variable in C used for?

To store data Signup and view all the answers

Which of the following rules for defining variables in C is correct?

Variable names must not be reserved words or keywords Signup and view all the answers

What type of variable must be initialized before it is used?

Local variable Signup and view all the answers

Which storage class in C retains its value between multiple function calls?

Static Signup and view all the answers

What happens to the memory assigned to automatic variables upon exiting a block in C?

Memory is automatically freed Signup and view all the answers

What will be printed when the first code snippet is executed?

garbage garbage garbage Signup and view all the answers

Which type of variables can hold their value between multiple function calls?

Static Signup and view all the answers

What is not allowed for register variables while using the & operator?

Dereferencing Signup and view all the answers

Which storage class should be used for variables intended to be stored in the CPU registers?

Register Signup and view all the answers

What does the external storage class signify in C programming?

Variable declared elsewhere in the program Signup and view all the answers

What happens when a static global variable is declared?

Memory allocation happens at compile time Signup and view all the answers

Who proposed the C language at Bell Laboratories in 1972?

Dennis Ritchie Signup and view all the answers

What was the original programming language that C evolved from?

BCPL Signup and view all the answers

Which book marked the first publication on C programming in 1978?

The C Programming Language Signup and view all the answers

What is the primary reason for the association between C programming language and UNIX?

Bulk of UNIX and applications written in C Signup and view all the answers

Which characteristic of C programming contributes to its high portability?

Isolation of machine-specific features within a few modules Signup and view all the answers

What is the purpose of the 'return' function in C programming?

To return a value and end the execution of a function Signup and view all the answers

What happens when a C program file is compiled without any errors?

It generates an executable '.obj' file Signup and view all the answers

What is the function of the Loader in a C program execution process?

It informs the CPU about the starting point of the loaded program Signup and view all the answers

What is the role of the Linker in the compilation process of a C program?

Generates the final executable file by linking object files and library functions Signup and view all the answers

Which file extension is used for an intermediate file generated during the compilation process of a C program?

'.obj' Signup and view all the answers

What is the purpose of using the 'scanf' function in C programming?

To read input from the user Signup and view all the answers

Which function in C can be used to find the power of a given number?

pow() Signup and view all the answers

What is the significance of declaring variables before using them in C programming?

To allocate storage space Signup and view all the answers

Which of the following functions in C returns the square root of a given number?

sqrt() Signup and view all the answers

In C programming, what is the main purpose of using the 'pow()' function?

To calculate the power of a number Signup and view all the answers

What is the significance of the 'main()' function in a C program?

It is the first function executed by the computer Signup and view all the answers

Why is it important to declare variables in C programming?

To ensure that a variable exists before it's used Signup and view all the answers

What is the primary purpose of the preprocessor section in a C program?

To include header files in the program Signup and view all the answers

Which section of a C program includes declarations for global variables?

Global declaration section Signup and view all the answers

What does the 'define' section in a C program typically comprise of?

Global constants declared using the define keyword Signup and view all the answers

What is the visibility of global variables in C programming?

Available to all functions Signup and view all the answers

Which keyword is used to define static variables in C?

static Signup and view all the answers

What is the default value assigned to automatic variables in C?

Garbage value Signup and view all the answers

Which storage class in C has the shortest lifetime?

Automatic Signup and view all the answers

What is the main difference between global and external variables in C?

The memory location Signup and view all the answers

What is the purpose of 'typedef' in 'C' programming?

To create new data type names defined by the user Signup and view all the answers

Which escape sequence is used for a new line in 'C' character constants?

\n Signup and view all the answers

What is the range of values for an 'Unsigned int' basic data type in 'C'?

0 to 4,294,967,295 Signup and view all the answers

What is the importance of declaring an unsigned constant in 'C'?

To increase the range of storage Signup and view all the answers

Which data type should be used in 'C' to store a set of data values?

Arrays and Structures Signup and view all the answers

What is a key feature of static variables in C programming?

Hold their value between multiple function calls Signup and view all the answers

Which storage class in C allows variables to be stored in CPU registers?

Register Signup and view all the answers

What is the default initial value of external variables in C?

0 Signup and view all the answers

When using the 'extern' storage class, what does the compiler expect?

External linkage elsewhere Signup and view all the answers

What is a limitation of register variables in C?

& operator can be used on them Signup and view all the answers

Which statement accurately describes the visibility of static global variables in C?

Accessible from any file within the program Signup and view all the answers

What differentiates automatic variables from static variables in C?

Automatic variables are not initialized by default Signup and view all the answers

Which keyword is used to define a variable that should be stored in CPU registers?

'register' Signup and view all the answers

'extern' storage class is primarily used to declare variables with what kind of linkage?

external Signup and view all the answers

What is a common characteristic of all register variables in C?

Faster access time Signup and view all the answers

What was the main goal of the American National Standards Institute (ANSI) committee that was established in 1983 in relation to the C programming language?

To develop a machine-independent definition of the language C Signup and view all the answers

Which computer system was one of the first portable operating systems due to the fact that the C language does not directly rely on specific hardware architecture?

UNIX OS Signup and view all the answers

Who wrote the book 'The C Programming Language' which was first published in 1978?

Ken Thompson and Brian Kernighan Signup and view all the answers

Which early form of the C language was written by Ken Thompson for the DEC PDP-7 computer?

B language Signup and view all the answers

Which individual designed C programming for use with UNIX on DEC PDP-11 computers?

Dennis Ritchie Signup and view all the answers

What is the purpose of the Loader in the C program execution process?

Loads the executable file in RAM and informs the CPU with the starting point Signup and view all the answers

In C programming, what is the role of the Linker in the compilation process?

Links object files to library functions Signup and view all the answers

Which section of a C program includes user-defined functions like color(), sum(), and division()?

Program Execution Signup and view all the answers

What happens when a C program file is compiled without any errors?

It saves the file as a .obj file of the same name Signup and view all the answers

Which of the following statements accurately describes expressions in C programming?

Expressions are formulas linking operands with operators Signup and view all the answers

Which section of a C program includes declarations for global variables?

Global declaration Signup and view all the answers

What is the purpose of the 'pow()' function in C Math?

Returning the power of a given number Signup and view all the answers

What is the primary difference between local and global variables in C programming?

Local variables are defined within functions, while global variables are declared outside functions Signup and view all the answers

What is the main purpose of using the 'typedef' keyword in C programming?

Renaming data types Signup and view all the answers

Which keyword is used to define a variable that should be stored in CPU registers?

register Signup and view all the answers

Which feature contributes to the high portability of C programming language?

Availability of multiple data types Signup and view all the answers

What is a common characteristic of all static variables in C programming?

They retain their value between function calls Signup and view all the answers

What does the 'define' section in a C program typically comprise of?

Constant declarations Signup and view all the answers

Which storage class in C retains its value between multiple function calls?

Static Signup and view all the answers

What is the purpose of the Linker in the compilation process of a C program?

Resolving references to functions defined in other files Signup and view all the answers

Which keyword is used in C to declare a variable that retains its value between multiple function calls?

static Signup and view all the answers

In C programming, where should a global variable typically be declared to make it accessible to all functions?

Outside any function or block Signup and view all the answers

What is the default value assigned to automatic variables in C?

Garbage Value Signup and view all the answers

Which storage class in C has the shortest lifetime, limited to the block in which it is defined?

Auto Signup and view all the answers

What happens to the memory assigned to automatic variables upon exiting from the block in which they are defined?

Memory is deallocated immediately Signup and view all the answers

What is the storage size of a 'Char' basic data type in C?

8 bits Signup and view all the answers

In C programming, what is the value range of an 'Unsigned long' basic data type?

0 to 4,294,967,295 Signup and view all the answers

Which data type in C is used for creating new data type names defined by the user?

Typedef Signup and view all the answers

In C programming, what does the suffix 'f' or 'F' indicate when used with floating point constants?

Float constant Signup and view all the answers

What is the numerical value of the character constant 'a' in a C program?

'a' Signup and view all the answers

What is a key feature of static variables in C?

Their value persists between multiple function calls Signup and view all the answers

What is a limitation of register variables in C?

They cannot be dereferenced Signup and view all the answers

Which storage class in C retains its value between multiple function calls?

Static Signup and view all the answers

What is the default initial value of external integral type variables in C?

0 Signup and view all the answers

What does the 'extern' storage class indicate about a variable in C?

The variable is declared with an external linkage elsewhere Signup and view all the answers

Which statement accurately describes the visibility of static global variables in C?

Limited to the file they are declared in Signup and view all the answers

What was the original name of the language C before it evolved further?

B language Signup and view all the answers

Which computer was the C language first designed for by Dennis Ritchie?

DEC PDP-7 Signup and view all the answers

What is one of the key characteristics of UNIX operating system code written in C?

Highly adaptable to different hardware architectures Signup and view all the answers

Who co-authored the first book on C programming published in 1978 along with Dennis Ritchie?

Brian Kernighan Signup and view all the answers

What is one of the main reasons why UNIX was one of the first portable operating systems?

Isolation of machine-specific features within the kernel Signup and view all the answers

What is the primary purpose of defining the 'define' section in a C program?

Define constants using the define keyword Signup and view all the answers

Which section of a C program is responsible for including header files?

Preprocessor section Signup and view all the answers

What is the purpose of the 'main()' function in a C program?

Starting point of execution Signup and view all the answers

Which part of the C program contains all the global declarations?

Global declaration Signup and view all the answers

What type of memory is assigned to automatic variables in C?

Stack memory Signup and view all the answers

Which component in a C program is responsible for linking the object files to library functions?

Linker Signup and view all the answers

What is the purpose of the 'return' function in C programming?

To end the execution of a function Signup and view all the answers

What file extension is given to an object file generated by the C compiler?

.obj Signup and view all the answers

In the context of C programming, what is the significance of declaring variables before using them?

It informs the compiler about variable types Signup and view all the answers

What is the role of the Loader in the execution of a C program?

Load the object file into RAM Signup and view all the answers

What type of operations can be performed using the 'pow()' function in C Math?

Calculate and return the power of a given number Signup and view all the answers

How does the 'ceil()' function in C Math differ from the 'floor()' function?

ceil() rounds up the given number, while floor() rounds down Signup and view all the answers

What does the 'int_amt' variable store in the INTEREST CALCULATIONS program?

Result of multiplying principle and rate of interest Signup and view all the answers

What is the key difference between Keywords and Identifiers in C programming?

Keywords are reserved words with predefined meaning, while Identifiers are names for variables and program elements Signup and view all the answers

In C programming, what is a common characteristic of all register variables?

They are stored in CPU registers for faster access Signup and view all the answers

What is the range of the 'Float' basic data type in 'C'?

3.410E-38 to 3.410E38 Signup and view all the answers

Which escape sequence in 'C' represents a Carriage return?

\r Signup and view all the answers

What is the purpose of the 'typedef' keyword in 'C' programming?

To create new data type names defined by the user Signup and view all the answers

Which constant type is used to increase the range of storage in 'C'?

Unsigned constants Signup and view all the answers

In C programming, what is the significance of declaring an unsigned constant?

To increase the range of storage Signup and view all the answers

Which type of variable retains its value between multiple function calls in C programming?

Static variable Signup and view all the answers

What is the default visibility scope of automatic variables in C programming?

Block scope Signup and view all the answers

In C programming, what is the primary reason for initializing local variables before use?

To ensure predictable behavior Signup and view all the answers

Which storage class in C has memory allocated automatically at runtime?

Automatic Signup and view all the answers

What happens to the memory assigned to automatic variables upon exiting from the block in C programming?

It is freed up for reuse Signup and view all the answers

What is the primary reason for using the 'static' keyword with variables in C?

To retain the value of the variable between multiple function calls Signup and view all the answers

Which storage class in C provides faster access time compared to automatic variables?

Register Signup and view all the answers

What happens when a static global variable is declared in a C program?

It retains its value between multiple function calls Signup and view all the answers

Which of the following is true about external variables in C?

They are only declared to have external linkage elsewhere Signup and view all the answers

Why can't static variables be stored in CPU registers?

Only one storage specifier can be used for a variable Signup and view all the answers

What is a key feature of register variables in C?

The compiler allocates memory into CPU registers for them Signup and view all the answers

Which keyword is used to define a variable that retains its value between multiple function calls?

__static Signup and view all the answers

What does the 'extern' storage class indicate in C?

It is intended to specify that the variable is declared elsewhere in the program Signup and view all the answers

When a variable is declared as 'register' in C, why can't pointers be stored in the register?

'register' variables cannot hold addresses Signup and view all the answers

History of C Programming Language

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Questions and Answers

Who proposed the C language at Bell Laboratories in 1972?

Which programming language is most frequently associated with UNIX?

What was one of C's earlier forms before it evolved from BCPL?

Which book, published in 1978, was the first book on C programming?

What was the goal of the ANSI committee established in 1983 regarding the C language?

What comes after local declarations in the main function?

What is the purpose of a return function in a program?

Which file type is NOT generated during the compilation process of a C program?

What does the Linker do in the compilation process of a C program?

Which component stores the address of the next instructions to be executed by the CPU?

What is the purpose of the 'ceil()' function in C Math?

Which keyword in C language is used to define a loop?

What is the purpose of identifiers in C programming?

Why is it important to declare variables in C programming?

What is the purpose of the 'pow()' function in C Math?

What is the range of the 'Short int' basic data type in 'C'?

Which data type is used in 'C' to store a set of data values?

How are string constants represented in 'C'?

Which constant type is used to associate constant values with names in 'C'?

What is the main purpose of declaring an unsigned constant in 'C'?

What is the purpose of the preprocessor section in a C program?

Which organization established the ANSI C standard?

What is the significance of the main() function in a C program?

What is a key feature of C programming that makes it highly portable?

Which section of a C program usually includes declarations for global variables?

What is a variable in C used for?

Which of the following rules for defining variables in C is correct?

What type of variable must be initialized before it is used?

Which storage class in C retains its value between multiple function calls?

What happens to the memory assigned to automatic variables upon exiting a block in C?

What will be printed when the first code snippet is executed?

Which type of variables can hold their value between multiple function calls?

What is not allowed for register variables while using the & operator?

Which storage class should be used for variables intended to be stored in the CPU registers?

What does the external storage class signify in C programming?

What happens when a static global variable is declared?

Who proposed the C language at Bell Laboratories in 1972?

What was the original programming language that C evolved from?

Which book marked the first publication on C programming in 1978?

What is the primary reason for the association between C programming language and UNIX?

Which characteristic of C programming contributes to its high portability?

What is the purpose of the 'return' function in C programming?

What happens when a C program file is compiled without any errors?

What is the function of the Loader in a C program execution process?

What is the role of the Linker in the compilation process of a C program?

Which file extension is used for an intermediate file generated during the compilation process of a C program?

What is the purpose of using the 'scanf' function in C programming?

Which function in C can be used to find the power of a given number?

What is the significance of declaring variables before using them in C programming?

Which of the following functions in C returns the square root of a given number?

In C programming, what is the main purpose of using the 'pow()' function?

What is the significance of the 'main()' function in a C program?

Why is it important to declare variables in C programming?

What is the primary purpose of the preprocessor section in a C program?

Which section of a C program includes declarations for global variables?

What does the 'define' section in a C program typically comprise of?

What is the visibility of global variables in C programming?

Which keyword is used to define static variables in C?

What is the default value assigned to automatic variables in C?

Which storage class in C has the shortest lifetime?

What is the main difference between global and external variables in C?

What is the purpose of 'typedef' in 'C' programming?

Which escape sequence is used for a new line in 'C' character constants?

What is the range of values for an 'Unsigned int' basic data type in 'C'?

What is the importance of declaring an unsigned constant in 'C'?

Which data type should be used in 'C' to store a set of data values?

What is a key feature of static variables in C programming?

Which storage class in C allows variables to be stored in CPU registers?

What is the default initial value of external variables in C?

When using the 'extern' storage class, what does the compiler expect?

What is a limitation of register variables in C?

Which statement accurately describes the visibility of static global variables in C?

What differentiates automatic variables from static variables in C?

Which keyword is used to define a variable that should be stored in CPU registers?

'extern' storage class is primarily used to declare variables with what kind of linkage?

What is a common characteristic of all register variables in C?