Computing Basics Interview Questions

Use recursion to write a function that determines the length of a string

int strlen(char * str) {
  if (str[0] == 0)
    return 0;
  return 1 + strlen(str + 1);
}

What’s the number after F in hexadecimal?0x10
Bitwise: what is 7 | 1? 7 & 1? ~7?

7 (0111). 1 (0001). -8 (1000).

Write a script that prints the numbers from 1 to 100. But for multiples of four print “Four” instead of the number and for the multiples of seven print “Seven”. For numbers which are multiples of both four and seven print “FourSeven”.

for (int ii = 1; ii <= 100; ii++) {
	boolean isMultipleOfFour = (ii % 4 == 0);
	boolean isMultipleOfSeven = (ii % 7 == 0);
	if (isMultipleOfFour && isMultipleOfSeven)
		System.out.println("FourSeven");
 	else if (isMultipleOfFour)
		System.out.println("Four");
 	else if (isMultipleOfSeven)
 		System.out.println("Seven");
	else
		System.out.println(ii);
}

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Computing Basics Interview Questions

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