C Language
Multiple Choice Questions

A Language

B Language

BCPL

C++ Language

Dennis Ritchie

Ken Thompson

Bill Gates

Peter Norton

1972

1970

1976

1979

High level

Low level

Middle level

Machine level

DOS

Windows

Unix

All of these

|

#

^

;

Keywords

Variables

Constants

All of these

0 to 256

-32768 to +32767

-65536 to +65536

None of these

Float

Union

Array

Pointer

!

#

$

;

Single quotes

Double quotes

Both A and B

None of these

8

16

32

64 (ANSI standard)

2

1

0

3

*

&

%

->

Left to right

Right to left

Both

None

&

&&

|

||

2 bytes

4 bytes

8 bytes

1 byte

The size of a variable in bytes

The address of a variable

The value of a variable

The type of a variable

break

continue

return

exit

Yes

No

Error

None

for

while

do-while

All of these

To implement multi-way branching

To loop until a condition is met

To define a function

To declare variables

It executes when no case matches

It executes before all cases

It is mandatory

It executes after all cases

0 1 2

0 1 2 3

1 2 3

No output

1

0

-1

Any

20 bytes

40 bytes

10 bytes

4 bytes

int arr[3][4];

int arr[3,4];

int arr(3)(4);

int arr[3] [4];

arr[0]

arr[1]

arr

arr[last]

1

2

3

Error

1

2

No limit

3

int

void

float

char

function

def

void

There is no keyword; functions are defined by their return type and name

Local to the function

Global

File scope

Block scope

int sum(int a, int b);

sum(int a, int b) int;

int sum(a,b);

void sum(int a, b);

To exit the function and optionally return a value

To declare a variable

To call another function

To print something

Function calling itself

Function calling another function

Function without a return type

Function with multiple parameters

A variable that stores the address of another variable

A data type

A function

A loop

*

&

%

->

*

&

%

->

2 bytes

4 bytes

8 bytes

1 byte

A pointer that points to nothing

A pointer that points to address 0

A pointer that is not initialized

Both A and B

A pointer that stores the address of a function

A function that returns a pointer

A data type

A loop

A collection of variables of different data types under a single name

An array of similar data types

A pointer

A function

Union members share the same memory location; structure members have separate memory

Union can hold only one data type

Structure members share memory

There is no difference

.

->

&

*

struct { int x; float y; } variable;

structure { int x; float y; } variable;

typedef struct { int x; float y; } variable;

Both A and C

Sum of sizes of all members

Size of the largest member

Average of sizes

Size of the first member

Yes

No

Only by reference

Only pointers

stdio.h

stdlib.h

string.h

math.h

fopen()

open()

file_open()

create_file()

r

w

a

rw

fclose()

close()

file_close()

clos()

fgets()

fgetline()

gets()

scanf()

Checks for end-of-file

Reads a file

Writes to a file

Closes a file

9

6

12

Error

To include header files

To define macros

To conditionally compile

To declare functions

#ifdef

#undef

#pragma

All of these

To check if a macro is not defined

To check if a macro is defined

To include a file

To define a macro

To provide additional instructions to the compiler

To define a macro

To include a header

To conditionally compile

<> searches in system directories, '' searches in current directory first

Both are same

<> searches in current directory, '' in system directories

None

malloc()

calloc()

realloc()

All of these

malloc allocates uninitialized memory; calloc allocates zero-initialized memory

malloc takes one argument; calloc takes two

Both A and B

They are identical

free()

delete()

release()

dealloc()

void*

int*

char*

float*

Changes the size of previously allocated memory

Allocates new memory

Frees memory

Initializes memory

Memory that is allocated but never freed

Memory that is freed twice

Memory that is not accessible

Memory that is corrupted

string.h

stdlib.h

stdio.h

ctype.h

5

6

4

7

strcpy()

strncpy()

strdup()

All of these

strcat concatenates full string; strncat appends a specified number of characters

strcat is faster

strncat is safer

Both A and C

strcmp()

strncmp()

Both A and B

strdiff()

11

10

12

0

A dynamic data structure consisting of nodes with pointers

An array of structures

A type of file

A function

A LIFO (Last In First Out) data structure

A FIFO data structure

An array

A linked list

A FIFO (First In First Out) data structure

A LIFO data structure

A file

A function

To tell the compiler that a variable's value may change unexpectedly

To make a variable read-only

To declare a static variable

To initialize a variable

To create an alias for a data type

To define a function

To declare a variable

To create a structure

To make the variable retain its value across function calls

To make the variable global

To initialize the variable to 0

To make the function inline

A structure member that occupies a specified number of bits

An array of bits

A pointer to bits

A function that manipulates bits

To make a variable read-only

To declare a constant

To prevent modification

All of the above

int

void

float

char

\n

\t

\r

\b

1 byte

2 bytes

4 bytes

8 bytes

wchar_t

char

short

long

3.33

3

4

0

=

==

!=

===

One

Default

OneDefault

Error

for

while

do-while

All

0

3

Garbage value

Error

By passing the array name

By passing a pointer to the first element

Both A and B

By passing the array size

auto

static

register

extern

return

exit

break

continue

Adding or subtracting integers to a pointer to move to other memory locations

Multiplying pointers

Dividing pointers

Comparing pointers

A pointer to a pointer

A pointer to a structure

A pointer to an array

A function pointer

struct

union

typedef

class

Yes

No

Only if typedef is used

Only in C++

fputc()

fprintf()

putc()

All of these

FILE*

file*

FILE

File

20

15

10

Error

#define

#undef

#ifdef

#include

calloc()

malloc()

realloc()

free()

To release allocated memory

To allocate memory

To reallocate memory

To initialize memory

toupper()

strupr()

strtoupper()

toupper() is for characters, not strings; no standard function

strtok splits strings, strchr finds a character

strchr splits strings, strtok finds a character

Both split strings

Both find characters

A function that calls itself

A function that calls another function

A function that returns void

A function that has no parameters

To declare a variable that is defined in another file

To define a static variable

To make a variable global

To initialize a variable

1

2

3

No minimum

int

float

string

double

Highest

Lowest

Same as relational

None

continue

break

return

goto

sort()

qsort()

bubble_sort()

No standard sorting function

A function that is expanded at the call site to reduce function call overhead

A function that cannot be called

A function that returns void

A function with no parameters

A pointer that can point to any data type

A pointer that points to nothing

A pointer that cannot be dereferenced

Both A and C

Yes

No

Only with typedef

Only in C++

fgetc()

fread()

getc()

All of these

To produce a compile-time error message

To stop preprocessing

To include a file

To define a macro

Nothing happens

Memory leak

Segmentation fault

Error

strlen()

size()

length()

strlength()

To suggest the compiler to store the variable in a CPU register

To make a variable read-only

To make a variable global

To define a function

A pointer that stores the address of a function

A function that returns a pointer

A pointer to an array

A data type