Question 1

Consider the following code snippet. Assuming that the user inputs 75 as the age, what is the output?
Int age = 0;
Scanner in = new Scanner(System.in);
System.out.print("Please enter your age: ");
Age = in.nextInt();
If (age < 10)
{
System.out.print("Child ");
}
If (age < 30)
{
System.out.print("Young adult ");
}
If (age < 70)
{
System.out.print("Old ");
}
If (age < 100)
{
System.out.print("Impressively old ");
}

Accepted Answer

The answer of Consider the following code snippet. Assuming that...

Question 2

What is the value of the price variable after the following code snippet is executed?
Int price = 42;
If (price < 40)
{
Price = price + 10;
}
If (price > 30)
{
Price = price * 2;
}
If (price < 100)
{
Price = price - 20;
}

Accepted Answer

The answer of What is the value of the price...

Question 3

Consider the following code snippet. What is the potential problem with the if statement?
Double average;
Average = (g1 + g2 + g3 + g4) / 4.0;
If (average == 90.0)
{
System.out.println("You earned an A in the class!");
}

Accepted Answer

The answer of Consider the following code snippet. What is...

Question 4

Assuming that a user enters 5 as the value for num, what is the output of the following code snippet?
Int num = 0;
Scanner in = new Scanner(System.in);
System.out.print("Enter a number: ");
Num = in.nextInt();
If (num < 50)
{
Num = num + 5;
}
If (num < 10)
{
Num = num - 2;
}
If (num > 5)
{
Num++;
}
Else
{
Num--;
}
System.out.println(num);

Accepted Answer

The user enters 5 as the value for num. After that, the code checks the value of num and sees that it is less than 50, so it adds 5 to it, making num equal to 10. Then it checks if num is less than 10, which is not true anymore since num is now 10. Therefore, it skips the second if statement. Next, it checks if num is greater than 5, which is true since num is 10. So it increments num by 1, making num equal to 11. Finally, it prints the value of num, which is 11.

Question 5

The two strings "Aardvark" and "Aardvandermeer" are exactly the same up to the first six letters. What is their correct lexicographical ordering?

Accepted Answer

Lexicographical ordering compares strings character by character from left to right. Since "Aardvark" and "Aardvandermeer" are the same up to the first six letters, the comparison moves to the seventh letter, where "Aardvandermeer" has 'd' and "Aardvark" has 'v'. Since 'd' comes before 'v' in the alphabet, "Aardvandermeer" is first in lexicographical order.

Question 6

What is the output of the following code snippet?
String str1 = "her";
String str2 = "cart";
If (str1.compareTo(str2) < 0)
{
System.out.print(str2);
}
Else
{
System.out.print(str1);
}

Accepted Answer

The answer of What is the output of the following...

Question 7

Which of the following options is a legally correct expression for inverting a condition?

Accepted Answer

Option A uses the logical NOT operator (!) before the condition (a == 10) to invert it. This is the correct syntax in many programming languages. Option B is incorrect because it applies the NOT operator to only the variable a, not the entire condition. Option C uses the strict inequality operator (!==) which is not the same as inverting a condition. Option D is syntactically incorrect because there is no operator between the variable a and the value 10.

Question 8

Write an if-statement condition that is true if the length of string s1 is greater than 42.

Accepted Answer

The condition "s1.length() > 42" checks if the length of s1 is greater than 42.

Question 9

What is the problem with the following if statement?
Double count = 15.0;
If (count / 3.0)
{
System.out.println("The value of count is ");
}

Accepted Answer

The condition in the if statement is a division operation, which evaluates to a numeric value rather than a Boolean value. Therefore, it will not work as a valid condition for the if statement.

Question 10

Which condition, when supplied in the if statement below in place of (. . .), will correctly protect against division by zero?
If (. . .)
{
Result = grade / num;
System.out.println("Just avoided division by zero!");
}

Accepted Answer

The condition (num != 0) checks if the variable num is not equal to zero. This will protect against division by zero because if the num variable is equal to zero, the division operation will result in an arithmetic error.

Question 11

Consider the following code snippet. Assuming that the user enters first 20 and then 12 as the two input values, what is the output of the code snippet?
Int num1 = 0;
Int num2 = 0;
Int num3 = 0;
Int num4 = 0;
Int num5 = 0;
Scanner in = new Scanner(System.in);
System.out.print("Enter a number: ");
Num1 = in.nextInt();
System.out.print("Enter a number: ");
Num2 = in.nextInt();
If (num1 < num2)
{
Num3 = num1;
}
Else
{
Num3 = num2;
}
If (num1 < num2 + 10)
{
Num4 = num1;
}
Else if (num1 < num2 + 20)
{
Num5 = num1;
}
System.out.println("num1 = " + num1 + " num2 = " + num2
+ " num3 = " + num3 + " num4 = " + num4
+ " num5 = " + num5);

Accepted Answer

The first two input values are stored in num1 and num2 respectively. Then, the program checks if num1 is less than num2. Since 20 is greater than 12, the if statement evaluates to false and the program executes the statements under the else clause. So, num3 is assigned the value of num2 which is 12.

Next, the program checks if num1 is less than num2 + 10. 12 + 10 is 22 which is greater than 20. So, this if statement evaluates to false and the program moves to the next if condition. Here, num1 is less than num2 + 20 which evaluates to true since 12 + 20 is 32 which is greater than 20. So, num5 is assigned the value of num1 which is 20.

Finally, the program prints the values of all variables which are num1=20, num2=12, num3=12, num4=20, and num5=0.

Question 12

What is the output of the following code snippet?
Int num = 100;
If (num != 100)
{
System.out.println("100");
}
Else
{
System.out.println("Not 100");
}

Accepted Answer

The condition in the if statement is false because num is indeed equal to 100. Therefore, the code inside the if statement is not executed and the code inside the else statement is executed, printing "Not 100".

Question 13

In a switch statement, if a break statement is missing

Accepted Answer

The answer of In a switch statement, if a break...

Question 14

What is the conditional required to check whether the length of a string s1 is odd?

Accepted Answer

To check whether the length of a string s1 is odd, we need to check if the remainder of dividing the length of the string by 2 is not equal to 0. This would mean that there is a remainder when dividing the length by 2, indicating an odd length. Hence, option B is the correct choice.

Question 15

Assuming that the user enters 60 as the input, what is the output after running the following code snippet?
Int num = 0;
Scanner in = new Scanner(System.in);
System.out.print("Enter a number: ");
Num = in.nextInt();
If (num < 10)
{
System.out.println("Too small!");
}
Else if (num < 50)
{
System.out.println("Intermediate!");
}
Else if (num < 100)
{
System.out.println("High!");
}
Else
{
System.out.println("Too high!");
}

Accepted Answer

Since the user enters 60, which is between 50 and 100, the output will be "High!". The code first checks if the input is less than 10 (which is false), then checks if it is less than 50 (which is also false), and finally checks if it is less than 100 (which is true). Therefore, the output will be "High!".

Question 16

Consider a situation where multiple if statements are combined into a chain to evaluate a complex condition. Which of the following reserved words is used to define the branch to be executed when none of the conditions are true?

Accepted Answer

The reserved word "else" is used to define the branch to be executed when none of the conditions in the if-else chain are true. It is the final branch in the chain and does not have a condition associated with it.

Question 17

What is the output of the following code snippet?
Int s1 = 20;
If (s1 <= 20)
{
System.out.print("1");
}
If (s1 <= 40)
{
System.out.print("2");
}
If (s1 <= 20)
{
System.out.print("3");
}

Accepted Answer

The answer of What is the output of the following...

Question 18

When an if statement is nested inside another if statement, it creates the possibility of

Accepted Answer

When an if statement is nested inside another if statement, it creates the possibility of having a dangling else, which occurs when an else statement is associated with the nearest if statement, even if it's not the intended one. This can result in unexpected behavior and bugs in the code.

Question 19

Suppose you want to write an if statement with multiple alternatives to print out the single tax bracket that someone is in, based on their income. Assume the integer variable income holds the annual income. What is wrong with the following if statement?
If (income < 10000)
{
System.out.println("Lowest tax bracket");
}
If (income < 20000)
{
System.out.println("Low-Middle tax bracket");
}
If (income < 30000)
{
System.out.println("Middle tax bracket");
}
System.out.println("High tax bracket");

Accepted Answer

The answer of Suppose you want to write an if...

Question 20

Consider the following code snippet:
Int number = 0;
Scanner in = new Scanner(System.in);
System.out.print("Enter a number: ");
Number = in.nextInt();
If (number > 30) { . . . }
Else if (number > 20) { . . .. }
Else if (number > 10) { . . . }
Else { . . . }
Assuming that the user input is 40, which block of statements is executed?

Accepted Answer

Since the user input is 40, the condition in the first if statement is true, and therefore, the block of statements inside that if statement is executed. The other else if and else statements are skipped.

Quiz 3: Decisionseasy

What is the value of the price variable after the following code snippet is executed? Int price = 42; If (price < 40) { Price = price + 10; } If (price > 30) { Price = price * 2; } If (price < 100) { Price = price - 20; }

Consider the following code snippet. What is the potential problem with the if statement? Double average; Average = (g1 + g2 + g3 + g4) / 4.0; If (average == 90.0) { System.out.println("You earned an A in the class!") ; }

The two strings "Aardvark" and "Aardvandermeer" are exactly the same up to the first six letters. What is their correct lexicographical ordering?

What is the output of the following code snippet? String str1 = "her"; String str2 = "cart"; If (str1.compareTo(str2) < 0) { System.out.print(str2) ; } Else { System.out.print(str1) ; }

Which of the following options is a legally correct expression for inverting a condition?

Write an if-statement condition that is true if the length of string s1 is greater than 42.

What is the problem with the following if statement? Double count = 15.0; If (count / 3.0) { System.out.println("The value of count is ") ; }

Which condition, when supplied in the if statement below in place of (. . .) , will correctly protect against division by zero? If (. . .) { Result = grade / num; System.out.println("Just avoided division by zero!") ; }

What is the output of the following code snippet? Int num = 100; If (num != 100) { System.out.println("100") ; } Else { System.out.println("Not 100") ; }

In a switch statement, if a break statement is missing

What is the conditional required to check whether the length of a string s1 is odd?

Consider a situation where multiple if statements are combined into a chain to evaluate a complex condition. Which of the following reserved words is used to define the branch to be executed when none of the conditions are true?

What is the output of the following code snippet? Int s1 = 20; If (s1 <= 20) { System.out.print("1") ; } If (s1 <= 40) { System.out.print("2") ; } If (s1 <= 20) { System.out.print("3") ; }

When an if statement is nested inside another if statement, it creates the possibility of