Answered: How many times will the following code…

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Question

Athough third multiple choice is longer but still it is a single question

1.) How many times will the following code print "Welcome to Java"?

int count = 0;
while (count < 10) {
System.out.println("Welcome to Java");
Count--;
}
a. 8
b. 9
c. 10
d. infinity

2.) What will be displayed when the following code is executed?

int number = 6;
while (number > 0) {
number -= 3;
System.out.print(number + " ");
}
a. 6 3 0
b. 6 3
c. 3 0
d. 3 0 -3
e. 0 -3

3.) Which of the following loops correctly computes 1/2 + 2/3 + 3/4 + ... + 99/100?

A:
double sum = 0;
for (int i = 1; i <= 99; i++) {
sum = i / (i + 1);
}
System.out.println("Sum is " + sum);

B:
double sum = 0;
for (int i = 1; i < 99; i++) {
sum += i / (i + 1);
}

System.out.println("Sum is " + sum);

C:
double sum = 0;
for (int i = 1; i <= 99; i++) {
sum += 1.0 * i / (i + 1);
}
System.out.println("Sum is " + sum);

D:
double sum = 0;
for (int i = 1; i <= 99; i++) {
sum += i / (i + 1.0);
}
System.out.println("Sum is " + sum);

E:
double sum = 0;
for (int i = 1; i < 99; i++) {
sum += i / (i + 1.0);
}
System.out.println("Sum is " + sum);

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