C Quiz - Linkedin

Question 1 of 32

1

Which Code sample will eventually cause the computer to run out of memory ?

Select one of the following:

c while(1) { char *smallString = (char *) malloc(10); } ```
c long long number = 1; while(1) number *= 2; ```
c while(1) { char hugeString[1000000L]; memset(hugeString, 0, 1000000L); } ```
c while(1) { long *bigArray = (long *) malloc(sizeof(long) * 1000); memset(bigArray, 1000000, 1000); free(bigArray); } ```

Explanation

Question 2 of 32

1

What will this code print on the screen?
int f1 (int a, int b)
{
if (a > b)
{
printf("A is greater than B\n");
return 1;
}
else
{
printf("B is greater than A");
return 0;
}
}

main()
{
if (f1(20,10) || f1(10,20))
printf("C is fun!\n");
}

Select one of the following:

A is greater then B C is fun!
A is greater then B B is greater then A C is fun!
A is greater then B B is greater then A
Northing is printed on Screen

Explanation

Question 3 of 32

1

What is the name for calling a function inside the same function?

Select one of the following:

recursion
subfunction
inner call
infinite loop

Explanation

Question 4 of 32

1

What does the declaration of variable c2 demonstrate?
main(){
char c1 ='a';
char c2 = c1+10;
}

Select one of the following:

character arithmetic
undefined assignment
type conversion
invalid declaration

Explanation

Question 5 of 32

1

A pointer to void named vptr, has been set to point to a floating point variable named g. What is the valid way to dereference vptr to assign its pointed value to a float variable named f later in this program?
float g;
void *vptr=&g;

Select one of the following:

f = _(float _)vptr;
f = (float *)vptr;
f = *(float *)vptr;
f = *(float)vptr;

Explanation

Question 6 of 32

1

What is this declaration an example of?
struct s {
int i;
struct s s1;
struct s s2;
};

Select one of the following:

a node
a linked list
a stack
a binary tree

Explanation

Question 7 of 32

1

A C header file is a file with extension .h that contains function declarations and macro definitons to be shared between several source files. Header files are listed using the preprocessing directive #include, and can have one of the following formats: #include <fileA> or #include "fileB". What is the difference between these two formats?

Select one of the following:

The preprocessor will try to locate the fileA in same directory as the source file, and the fileB in a predetermined directory path.
The preprocessor will try to locate the fileA in the fixed system directory. It will try to locate fileB in the directory path designated by the -l option added to the command line while compiling the source code.
The file using fileA syntax must be system files, of unlimited number. fileB must be a user file at a maximun of one per source file.
The preprocessor will try to locate the fileA in a predetermined directory path. It will try to locate fileB in the same directory as the source file along with a custom directory path.

Explanation

Question 8 of 32

1

Using a for loop, how could you write a C code to count down from 10 to 1 and display each number on its own line?

Select one of the following:

c for (int i = 0; i>=0, i--){ printf("%d\n", i); }//end of loop ```
c int i; for (i=1; i<=10; i++){ printf("%d", i); } ```
c int i = 10; while (i>0){ printf("%d\n", i); i--; } ```
c int i; for (i= 10; i>0; i--){ printf("%d\n", i); }// end of loop ```

Explanation

Question 9 of 32

1

What is not one of the reserved words in standard C?

Select one of the following:

volatile
typeof
register
typedef

Explanation

Question 10 of 32

1

What does the program shown below return?
int main(){
int a=1, b=2, c=3, d=4;
int x = a;
if (a>b)
if (b<c) x=b;
else x=c;
return(x);
}

Select one of the following:

1
3
2
0

Explanation

Question 11 of 32

1

Using the Union declaration below, how many bytes of memory space will the data of this type occupy?
union Cars {
char make[20];
char model[30];
short year;
} car;

Select one of the following:

32
54
30
52

Explanation

Question 12 of 32

1

In this code sample, what is not a problem for C compiler?
main(){
constant int PI = 3.14;
printf("%f\n", pi);
}

Select one of the following:

The value of PI needs to be set to 3.141593, not 3.14
The declaration of PI needs to say const, not constant.
The data type of PI needs to be float not int.
The printf statement needs to use PI, not pi.

Explanation

Question 13 of 32

1

Which is the smallest program to compile and run without errors?

Select one of the following:

main()
int main() {return 0;}
main() { }
main() { ; }

Explanation

Question 14 of 32

1

What is optional in a function declaration?

Select one of the following:

data type of parameters
return type of function
parameter names
number of parameters

Explanation

Question 15 of 32

1

C treats all devices, such as the display and the keyboard, as files. Which files opens automatically when a program executes?

Select one of the following:

stdout
stdio.h
default.h
string.h

Explanation

Question 16 of 32

1

In which segment does dynamic memory allocation takes place?

Select one of the following:

BSS Segment
stack
heap
data segment

Explanation

Question 17 of 32

1

Which of the following do you use to deallocate memory?

Select one of the following:

dalloc()
dealloc()
release()
free()

Explanation

Question 18 of 32

1

In C language what are the basic building blocks that are constructed together to write a program?

Select one of the following:

keywords
identifiers
tokens
functions

Explanation

Question 19 of 32

1

When is memory for a variable allocated?

Select one of the following:

during the assigment of the variable
during the initialization of the variable
during the declaration of the variable
during the definition of the variable

Explanation

Question 20 of 32

1

By default c uses the call by value method to pass arguments to functions. How can you invoke the call by reference method?

Select one of the following:

by using pointers
by declaring functions separately from defining them
by using recursive functions
by using global variables

Explanation

Question 21 of 32

1

A union allows you to store different _ in the same _.

Select one of the following:

Objects; Structure
Variables; Declaration
Data types; Memory location
Arrays; Header file

Explanation

Question 22 of 32

1

What is the output of this program?
main() {
char c1='a' , c2='A';
int i=c2-c1;
printf("%d", i);
}

Select one of the following:

32
runtime error
-32
0

Explanation

Question 23 of 32

1

What is the difference between scanf() and sscanf() functions?

Select one of the following:

The scanf() function reads data formatted as a string; The sscanf() function reads string input from the screen.
The scanf() function reads formatted data from the keyboard; The sscanf() function reads formatted input from a string.
The scanf() function reads string data from the keyboard; The sscanf() function reads string data from a string.
The scanf() function reads formatted data from a file; The sscanf() function reads input from a selected string

Explanation

Question 24 of 32

1

What is not a valid command with this declaration?
char *string[20] = { "one", "two", "three"};

Select one of the following:

printf("%c", string[1][2]);
printf("%s", string[1][2]);
printf("%s", string[1]);
printf(string[1]);

Explanation

Question 25 of 32

1

What is the expression player->name equivalent to?

Select one of the following:

player.name
(*player).name
*player.name
player.*name

Explanation

Question 26 of 32

1

Which program will compile and run without errors?

Select one of the following:

c main() { for(i=0; i<10; i++) ; } ```
c main() { int i=0; for(; i<10; i++) ; } ```
c main() { int i; for(i=0; i<j; i++) ; } ```
c main() { int i; for (i= 10; i<10; i++) } ```

Explanation

Question 27 of 32

1

What does this function call return?
1 main() { float x = f1(10, 5); }
2 float f1(int a, int b) { return (a/b); }

Select one of the following:

2
2.000000
a runtime error
a compiler error

Explanation

Question 28 of 32

1

What does this program create?
#include <stdio.h>
int main() {
int *p = NULL;
return 0;
}

Select one of the following:

a runtime error
a NULL pointer
a compile error
a void pointer

Explanation

Question 29 of 32

1

What is an alternative way to write the expression (*x).y?

Select one of the following:

There is no equivalent.
x->y
*x->y
y->x

Explanation

Question 30 of 32

1

Compile time errors are static errors that can be found where in the code?

Select one of the following:

in declarations and definitions
in functions and expressions
in syntax and semantics
in objects and statements

Explanation

Question 31 of 32

1

File input and output (I/O) in C is heavily based on the way it is done ___?

Select one of the following:

in Unix
in C++
in C#
in DOS

Explanation

Question 32 of 32

1

What does the strcmp(str1, str2); function return?

Select one of the following:

0 if str1 and str2 are the same, a negative number if str1 is less than str2, a positive number if str1 is greater than str2
true (1) if str1 and str2 are the same, false (0) if str1 and str2 are not the same
true (1) if str1 and str2 are the same, NULL if str1 and str2 are not the same
0 if str1 and str2 are the same, a negative number if str2 is less than str1, a positive number if str2 is greater than str1

	Created by Bianca Alexandra almost 5 years ago

https://github.com/Ebazhanov/linkedin-skill-assessments-quizzes/blob/master/c-(programming-language)/c-quiz.md

C Quiz - Linkedin

Question 1 of 32

Which Code sample will eventually cause the computer to run out of memory ?

Select one of the following:

Explanation

Question 2 of 32

What will this code print on the screen? int f1 (int a, int b) { if (a > b) { printf("A is greater than B\n"); return 1; } else { printf("B is greater than A"); return 0; } } main() { if (f1(20,10) || f1(10,20)) printf("C is fun!\n"); }

Select one of the following:

Explanation

Question 3 of 32

What is the name for calling a function inside the same function?

Select one of the following:

Explanation

Question 4 of 32

What does the declaration of variable c2 demonstrate? main(){ char c1 ='a'; char c2 = c1+10; }

Select one of the following:

Explanation

Question 5 of 32

A pointer to void named vptr, has been set to point to a floating point variable named g. What is the valid way to dereference vptr to assign its pointed value to a float variable named f later in this program? float g; void *vptr=&g;

Select one of the following:

Explanation

Question 6 of 32

What is this declaration an example of? struct s { int i; struct s *s1; struct s *s2; };

Select one of the following:

Explanation

Question 7 of 32

Select one of the following:

Explanation

Question 8 of 32

Using a for loop, how could you write a C code to count down from 10 to 1 and display each number on its own line?

Select one of the following:

Explanation

Question 9 of 32

What is not one of the reserved words in standard C?

Select one of the following:

Explanation

Question 10 of 32

What does the program shown below return? int main(){ int a=1, b=2, c=3, d=4; int x = a; if (a>b) if (b<c) x=b; else x=c; return(x); }

Select one of the following:

Explanation

Question 11 of 32

Using the Union declaration below, how many bytes of memory space will the data of this type occupy? union Cars { char make[20]; char model[30]; short year; } car;

Select one of the following:

Explanation

Question 12 of 32

In this code sample, what is not a problem for C compiler? main(){ constant int PI = 3.14; printf("%f\n", pi); }

Select one of the following:

Explanation

Question 13 of 32

Which is the smallest program to compile and run without errors?

Select one of the following:

Explanation

Question 14 of 32

What is optional in a function declaration?

Select one of the following:

Explanation

Question 15 of 32

C treats all devices, such as the display and the keyboard, as files. Which files opens automatically when a program executes?

Select one of the following:

Explanation

Question 16 of 32

In which segment does dynamic memory allocation takes place?

Select one of the following:

Explanation

Question 17 of 32

Which of the following do you use to deallocate memory?

Select one of the following:

Explanation

Question 18 of 32

In C language what are the basic building blocks that are constructed together to write a program?

Select one of the following:

Explanation

Question 19 of 32

When is memory for a variable allocated?

Select one of the following:

Explanation

Question 20 of 32

By default c uses the call by value method to pass arguments to functions. How can you invoke the call by reference method?

Select one of the following:

What will this code print on the screen?
int f1 (int a, int b)
{
if (a > b)
{
printf("A is greater than B\n");
return 1;
}
else
{
printf("B is greater than A");
return 0;
}
}

main()
{
if (f1(20,10) || f1(10,20))
printf("C is fun!\n");
}

What does the declaration of variable c2 demonstrate?
main(){
char c1 ='a';
char c2 = c1+10;
}

A pointer to void named vptr, has been set to point to a floating point variable named g. What is the valid way to dereference vptr to assign its pointed value to a float variable named f later in this program?
float g;
void *vptr=&g;

What is this declaration an example of?
struct s {
int i;
struct s s1;
struct s s2;
};

What does the program shown below return?
int main(){
int a=1, b=2, c=3, d=4;
int x = a;
if (a>b)
if (b<c) x=b;
else x=c;
return(x);
}

Using the Union declaration below, how many bytes of memory space will the data of this type occupy?
union Cars {
char make[20];
char model[30];
short year;
} car;

In this code sample, what is not a problem for C compiler?
main(){
constant int PI = 3.14;
printf("%f\n", pi);
}

A union allows you to store different _ in the same _.

What is the output of this program?
main() {
char c1='a' , c2='A';
int i=c2-c1;
printf("%d", i);
}

What is not a valid command with this declaration?
char *string[20] = { "one", "two", "three"};

What does this function call return?
1 main() { float x = f1(10, 5); }
2 float f1(int a, int b) { return (a/b); }

What does this program create?
#include <stdio.h>
int main() {
int *p = NULL;
return 0;
}