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COP 3514 Question and answers verified to pass 2024

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COP 3514 Question and answers verified to pass 2024 COP 3514 Which of the function definitions for a function isletter will correctly determine whether a character is an alphabetic letter and returns 1 for true and 0 for false? 1. int isletter(char ch) { if((ch >= 'a' && ch <= 'z')||(...

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  • September 7, 2024
  • 21
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers

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  • cop 3514
  • cop 3514 question and answers verified to pass 202

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COP 3514
Which of the function definitions for a function isletter will correctly determine
whether a character is an alphabetic letter and returns 1 for true and 0 for
false?
1.
int isletter(char ch)
{
if((ch >= 'a' && ch <= 'z')||(ch >= 'A' && ch <= 'Z'))
return 1;
else
return 0;
}


2.
int isletter(char ch)
{
if((ch >= 'a' || ch <= 'z')&&(ch >= 'A' || ch <= 'Z))
return 1;
else
return 0;
} - correct answer ✔1


The following program supposes to sum all entered int values that are greater
than 5. It takes integer input and -1 indicates the end of input. It compiles
without any error message, and it executes without error message, but
nevertheless is wrong. What is wrong with the program?
#include <stdio.h>

,int main()
{
int x, sum = 0;
while (x != -1)
{
scanf("%d", &x);
if (x > 5);
sum = sum +x;
}
printf("The sum of values > 5 is %d\n", sum);
} - correct answer ✔The semicolon at the end of the if statement causes all
entered values to be summed.


Which one of the following would exchange the values of the variables x and y
successfully?
a)
int tmp;
tmp = x;
x=y;
y=x;
b)
int tmp;
tmp = x;
x=y;
y=tmp;
c)
int tmp;

, tmp = y;
x=y;
y=tmp; - correct answer ✔b


Consider the following recursive function.
int compute(int low, int high){
if (low == high) return 0;
else return 1 + compute(low+1, high);
}




What does a call compute(3, 5) return? - correct answer ✔2


Which of the following defines a recursive function for calculating the factorial
of a number?
a)
int fact(int n)
{
if (n==1) return 1;
else return fact(n*(n-1));
}


b)
int fact(int n)
{
if (n==1) return 1;

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