Question 1

Which of the following loops will print the odd numbers between 0 and 20?

Accepted Answer

A)   
B)   
C)   
D)   
A)   
B)   
C)   
D)

Question 2

The command line interface of your operating system provides a way to link a file to the input of a program.What is this process called?

Accepted Answer

A) debugging 
B) redirection 
C) profiling 
D) compiling 
A) debugging 
B) redirection 
C) profiling 
D) compiling

Question 3

What for loop can be used in the indicated area so the code will print:

Accepted Answer

A) for (int num = 0; num  0; num--) 
A) for (int num = 0; num  0; num--)

Question 4

What is the output of the following code fragment?

Accepted Answer

A)  The value of sum is 0 . 
B)  The value of sum is 9 . 
C)  The value of sum is 12 . 
D)  The value of sum is 21 . 
A)  The value of sum is 0 . 
B)  The value of sum is 9 . 
C)  The value of sum is 12 . 
D)  The value of sum is 21 .

Question 5

How many times will the following loop run?

Accepted Answer

A) 0 
B) 8 
C) 9 
D) 10 
A) 0 
B) 8 
C) 9 
D) 10

Question 6

Is the following code snippet legal?

Accepted Answer

A) Yes, it is legal but does not print anything. 
B) Yes, it is legal and prints "Do you think in Java?" once. 
C) Yes, it is legal and prints "Do you think in Java?" twice. 
D) No, it is not legal and gives a compilation error. 
A) Yes, it is legal but does not print anything. 
B) Yes, it is legal and prints "Do you think in Java?" once. 
C) Yes, it is legal and prints "Do you think in Java?" twice. 
D) No, it is not legal and gives a compilation error.

Question 7

Consider the following loop: 
int n=1;
double x=0;
double s;
do
{
s=1.0 /(n * n) ;
x=x+5 ;
n++;
}
while (s>0.01);
System. out. println(x);
Which loop below is an equivalent loop?

Accepted Answer

A)  double x=0;
double s=1;
for (int k=1 ; s>0.01 ; k++ )
{
s=1.0 /(k * k) ;
x=x+s ;
}
System. out. println(x); 
B)  double x=0;
double s=1;
for (int k=1 ; k0.01)
{
s=1.0 /(k * k) ;
x=x+s ;
k++;
}
System.out. println(x); 
D)  double x=0;
double s=10;
int k=1;
while (s>0.01)
{
s=1.0 /(k * k) ;
x=x+s;
k++;
}
System.out. println(x); 
A)  double x=0;
double s=1;
for (int k=1 ; s>0.01 ; k++ )
{
s=1.0 /(k * k) ;
x=x+s ;
}
System. out. println(x); 
B)  double x=0;
double s=1;
for (int k=1 ; k0.01)
{
s=1.0 /(k * k) ;
x=x+s ;
k++;
}
System.out. println(x); 
D)  double x=0;
double s=10;
int k=1;
while (s>0.01)
{
s=1.0 /(k * k) ;
x=x+s;
k++;
}
System.out. println(x);

Question 8

Which of the following should be used when you need to ask a user to enter one data item and repeat the prompt if the data is invalid?
I.the for loop
II.the while loop
III.the do loop

Accepted Answer

A) I only 
B) I and II 
C) III only 
D) II only 
A) I only 
B) I and II 
C) III only 
D) II only

Question 9

What is the output of the following code fragment?

Accepted Answer

A) The value of sum is 65. 
B) The value of sum is 66. 
C) The value of sum is 55. 
D) The value of sum is 56. 
A) The value of sum is 65. 
B) The value of sum is 66. 
C) The value of sum is 55. 
D) The value of sum is 56.

Question 10

How many times does the code snippet given below display "Loop Execution"?

Accepted Answer

A) infinite times 
B) 8 times 
C) 9 times 
D) 10 times 
A) infinite times 
B) 8 times 
C) 9 times 
D) 10 times

Question 11

Given the following code snippet, what should we change to have 26 alphabet characters in the string str?

Accepted Answer

A) int c = 'A' 
B) str = c + str; 
C) c <= 'Z' 
D) must change to use a do loop 
A) int c = 'A' 
B) str = c + str; 
C) c <= 'Z' 
D) must change to use a do loop

Question 12

How many times does the loop execute in the following code fragment?

Accepted Answer

A) 11 
B) 12 
C) 13 
D) 14 
A) 11 
B) 12 
C) 13 
D) 14

Question 13

What is the output of the code snippet given below?

Accepted Answer

A) no output 
B) abcd 
C) abcde 
D) bcde 
A) no output 
B) abcd 
C) abcde 
D) bcde

Question 14

Which of the following statements is true about the variable sum in the code snippet below?

Accepted Answer

A) It contains the value 10 after the loop is finished executing. 
B) It contains the value 11 after the loop is finished executing. 
C) It is the cause of an infinite loop. 
D) It disappears after the loop is done executing. 
A) It contains the value 10 after the loop is finished executing. 
B) It contains the value 11 after the loop is finished executing. 
C) It is the cause of an infinite loop. 
D) It disappears after the loop is done executing.

Question 15

What does the following code snippet display?

Accepted Answer

A) It displays random Unicode characters. 
B) It displays random ASCII characters. 
C) Nothing because it has compilation error. 
D) It displays the hexadecimal characters between '0' and 'F.' 
A) It displays random Unicode characters. 
B) It displays random ASCII characters. 
C) Nothing because it has compilation error. 
D) It displays the hexadecimal characters between '0' and 'F.'

Question 16

What does the following code snippet print?

Accepted Answer

A) 10 
B) 20 
C) 30 
D) 40 
A) 10 
B) 20 
C) 30 
D) 40

Question 17

Which of the following conditions can be added to the code below so it will loop until the user enters "no" or "NO"?

Accepted Answer

A) response.equals("no") != response.equals("NO") 
B) !(response.equals("no") || response.equals("NO")) 
C) !response.equals("no") || !response.equals("NO") 
D) !(response.equals("no") && response.equals("NO")) 
A) response.equals("no") != response.equals("NO") 
B) !(response.equals("no") || response.equals("NO")) 
C) !response.equals("no") || !response.equals("NO") 
D) !(response.equals("no") && response.equals("NO"))

Question 18

This code snippet is intended to calculate the balance of an account after twenty years of gaining interest.Select the statement that correctly completes the loop.

Accepted Answer

A) years++; 
B) years--; 
C) balance++; 
D) balance--; 
A) years++; 
B) years--; 
C) balance++; 
D) balance--;

Question 19

Suppose you must design a program to calculate the roll-out (number of inches travelled in one revolution of the pedals of a bicycle based on its gear combinations). The user will provide the gear sizes, which must be converted into roll-out for all different gear combinations. How can the flow of user interaction for this problem be designed?

Accepted Answer

A) Hand-tracing can confirm code that implements gear selection. 
B) Pseudocode can guide algorithm design through divide-and-conquer strategy. 
C) A storyboard can be used. 
D) The physical gears can lead to ideas for the correct algorithm to use. 
A) Hand-tracing can confirm code that implements gear selection. 
B) Pseudocode can guide algorithm design through divide-and-conquer strategy. 
C) A storyboard can be used. 
D) The physical gears can lead to ideas for the correct algorithm to use.

Question 20

Which code snippet produces the sum of the first n even numbers?

Accepted Answer

A)   
B)   
C)   
D)   
A)   
B)   
C)   
D)

Exam 6: Loops

Which of the following loops will print the odd numbers between 0 and 20?

The command line interface of your operating system provides a way to link a file to the input of a program.What is this process called?

What for loop can be used in the indicated area so the code will print:

What is the output of the following code fragment?

How many times will the following loop run?

Is the following code snippet legal?

Consider the following loop: int n=1; double x=0; double s; do { s=1.0 /(n * n) ; x=x+5 ; n++; } while (s>0.01); System. out. println(x); Which loop below is an equivalent loop?

Which of the following should be used when you need to ask a user to enter one data item and repeat the prompt if the data is invalid? I.the for loop II.the while loop III.the do loop

What is the output of the following code fragment?

How many times does the code snippet given below display "Loop Execution"?

Given the following code snippet, what should we change to have 26 alphabet characters in the string str?

How many times does the loop execute in the following code fragment?

What is the output of the code snippet given below?

Which of the following statements is true about the variable sum in the code snippet below?

What does the following code snippet display?

What does the following code snippet print?

Which of the following conditions can be added to the code below so it will loop until the user enters "no" or "NO"?

This code snippet is intended to calculate the balance of an account after twenty years of gaining interest.Select the statement that correctly completes the loop.

Which code snippet produces the sum of the first n even numbers?

Introduction

Using Objects

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Fundamental Data Types

Decisions

Arrays and Array Lists

Designing Classes

Inheritance

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Input/Output and Exception Handling

Object-Oriented Design

Recursion

Sorting and Searching

The Java Collections Framework

Basic Data Structures

Tree Structures

Generic Classes

Stream Processing

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