download instant at
Name:______Covers Chapter 4 / CSCI 1301 Introduction to Programming
ArmstrongAtlanticStateUniversity
Instructor: Y. Daniel Liang
I pledge by honor that I will not discuss this exam with anyone until my instructor reviews the exam in the class. Signed by ______.
PartI.
(a) (3 pts) If you enter input 9, show the printout of the following code:
import java.util.Scanner;
public class Test {
public static void main(String[] args) {
Scanner input = new Scanner(System.in);
System.out.print("Enter an integer: ");
int number = input.nextInt();
int i;
boolean isPrime = true;
for (i = 2; i < number & isPrime; i++) {
if (number % i == 0) {
isPrime = false;
}
}
System.out.println("i is " + i);
if (isPrime)
System.out.println(number + " is prime");
else
System.out.println(number + " is not prime");
}
}
(b) (2 pts)
public class Test {
public static void main(String[] args) {
for (int i = 0; i < 5; i++)
System.out.print((i + 4) + " ");
}
}
(c)(4 pts)
public class Test {
public static void main(String[] args) {
int i = 1;
while (i <= 4) {
int num = 1;
for (int j = 1; j <= i; j++) {
System.out.print(num + "bb");
num *= 3;
}
System.out.println();
i++;
}
}
}
Part II: (10 pts each):
1. Write a complete program that prints numbers from 1 to 50, but if numbers that are multiples of 5, print HiFive, else if numbers that are divisible by 2, print HiTwo, and else if numbers that are divisible by 3 or 7, print HiThreeOrSeven.
2. Write a loop that computes (No need to write a complete program)
Part III: Multiple Choice Questions: (1 pts each)
(1. Mark your answers on the sheet. 2. Login and click Take Instructor Assigned Quiz for Quiz2. 3. Submit it online within 5 mins. 4. Close the Internet browser.)
1 What is the output for y?
int y = 0;
for (int i = 0; i<10; ++i) {
y += i;
}
System.out.println(y);
a. 45
b. 11
c. 13
d. 12
e. 10
#
2Analyze the following code.
int x = 1;
while (0 < x) & (x < 100)
System.out.println(x++);
a.The loop runs forever.
b.The code does not compile because the loop body is not in the braces.
c.The code does not compile because (0 < x) & (x < 100) is not enclosed in a pair of parentheses.
d.The numbers 1 to 99 are displayed.
e.The numbers 2 to 100 are displayed.
#
3 How many times will the following code print "Welcome to Java"?
int count = 0;
do {
System.out.println("Welcome to Java");
count++;
} while (count < 10);
A. 8
B. 0
C. 11
D. 10
E. 9
#
4 What is i after the following for loop is finished?
int y = 0;
for (int i = 0; i<10; ++i) {
y += i;
}
A. 10
B. undefined
C. 9
D. 11
#
5 Analyze the following code:
public class Test {
public static void main (String[] args) {
int i = 0;
for (i = 0; i < 10; i++);
System.out.println(i + 4);
}
}
A. The program compiles despite the semicolon (;) on the for loop line, and displays 4.
B. The program compiles despite the semicolon (;) on the for loop line, and displays 14.
C. The program has a compile error because of the semicolon (;) on the for loop line.
D. The program has a runtime error because of the semicolon (;) on the for loop line.
#
6 Which of the following expression yields an integer between 0 and 100, inclusive?
A. (int)(Math.random() * 100 + 1)
B. (int)(Math.random() * 101)
C. (int)(Math.random() * 100)
D. (int)(Math.random() * 100) + 1
#
7 Analyze the following code.
int count = 0;
while (count < 100) {
// Point A
System.out.println("Welcome to Java!");
count++;
// Point B
}
// Point C
A. count < 100 is always false at Point A
B. count < 100 is always true at Point B
C. count < 100 is always false at Point C
D. count < 100 is always true at Point C
E. count < 100 is always false at Point B
#
8. What is the output of the following fragment?
int i = 1;
int j = 1;
while (i < 5) {
i++;
j = j * 2;
}
System.out.println(j);
a. 4
b. 8
c. 16
d. 32
e. 64
Please double check your answer before clicking the Submit button. Whatever submitted to LiveLab is FINAL and counted for your grade.
Have you submitted your answer to LiveLib? ______
What is your score? ______
download instant at