Question 1

Consider the following code snippet, where the array lists contain elements that are stored in ascending order:  Which one of the following descriptions is correct for the given code snippet?

Accepted Answer

The answer of Consider the following code snippet, where the...

Question 2

Which statement is true about the code snippet below?

Accepted Answer

The answer of Which statement is true about the code...

Question 3

What is the output of the following statements?

Accepted Answer

The given statement is not a valid method or operation in Java. It does not have any output and will result in an error.

Question 4

What is the output of the following statements?

Accepted Answer

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

Question 5

A collection of test cases that can be used on future versions of a program is called:

Accepted Answer

A collection of test cases is called a test suite, which can be run on future versions of a program to ensure that the new changes or updates have not introduced errors or bugs. Cycling refers to the iterative process of software development, debugging is the process of finding and fixing errors or bugs, and version control is the management of changes made to a program's code over time.

Question 6

What should you check for when calculating the smallest value in an array list?

Accepted Answer

To calculate the smallest value in an array list, it's essential to ensure that the array list contains at least one element. Without any elements, it's impossible to determine a smallest value. The number of elements, whether the maximum or minimum value is in the first element, does not affect the ability to calculate the smallest value as long as there is at least one element to compare.

Question 7

Which statement is true about the code snippet below?

Accepted Answer

The code snippet displays an index out of bounds exception indicating that the array list is full and cannot accommodate more than 100 numbers. Therefore, option C is incorrect. Option B is also incorrect as there is no compile-time error in the code. Option A is not relevant to the code snippet. Thus, option D is the correct answer as it represents the run-time error that occurs when the array list is full.

Question 8

What will be printed by the statements below?

Accepted Answer

The answer of What will be printed by the statements...

Question 9

Which statement is true about the code snippet below?

Accepted Answer

The answer of Which statement is true about the code...

Question 10

When an integer literal is added to an array list declared as ArrayList<Integer>, Java performs:

Accepted Answer

Java performs auto-boxing when an integer literal is added to an ArrayList<Integer>. Auto-boxing is the process of automatically converting a primitive data type (such as int) to its corresponding object wrapper class (such as Integer). In this case, the integer literal is automatically converted to an Integer object before being added to the ArrayList.

Question 11

What will be printed by the statements below?

Accepted Answer

The answer of What will be printed by the statements...

Question 12

What is the output of the following statements?

Accepted Answer

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

Question 13

Regression testing is:

Accepted Answer

Regression testing involves testing each version or iteration of a program against a test suite to ensure that previously working functionalities have not been broken or affected by new changes or additions. Therefore, option C is the correct choice. Options A and B refer to different testing practices, while option D is incomplete and does not provide enough context.

Question 14

Consider the following code snippet:  Which statement is true after the main method is executed?

Accepted Answer

The answer of Consider the following code snippet:  Which...

Question 15

Which one of the following is a correct declaration for a method named passAList that has as arguments an array list myList of size 10 and an integer array intArr of size 20, and that modifies the contents of myList and intArr?

Accepted Answer

Option C is the correct declaration as it takes an ArrayList parameter named myList and an integer array parameter named intArr without specifying their sizes. This allows the method to accept ArrayList and integer arrays of any size and modify their contents. Options A and B have syntax errors while option D misspells the ArrayList type.

Question 16

Which statement is true about the code snippet below?

Accepted Answer

The code snippet creates two arrays, names and friends, and initializes them both with a single element. The method System.arraycopy is then used to copy the contents of the names array into the friends array, starting at index 1. This means that the first element of the friends array is unchanged, while the second element is taken from the names array. Therefore, the final size of names is 3 (the original element plus the two copied elements), and the final size of friends is 2 (the original element plus the copied element).

Question 17

Which one of the following is the correct code snippet for calculating the largest value in an integer array list aList?

Accepted Answer

The correct code snippet for finding the largest value in an integer array list would involve initializing a variable to store the maximum value, and then iterating through the list to compare each element with the current maximum and updating it accordingly. Option B is the only one that closely resembles this algorithm. The other options either have errors in syntax or do not involve iterating through the list to find the maximum value.

Quiz 7: Arrays and Array Lists

Consider the following code snippet, where the array lists contain elements that are stored in ascending order: Which one of the following descriptions is correct for the given code snippet?

Which statement is true about the code snippet below?

What is the output of the following statements?

What is the output of the following statements?

A collection of test cases that can be used on future versions of a program is called:

What should you check for when calculating the smallest value in an array list?

Which statement is true about the code snippet below?

What will be printed by the statements below?

Which statement is true about the code snippet below?

When an integer literal is added to an array list declared as ArrayList<Integer>, Java performs:

What will be printed by the statements below?

What is the output of the following statements?

Regression testing is:

Consider the following code snippet: Which statement is true after the main method is executed?

Which one of the following is a correct declaration for a method named passAList that has as arguments an array list myList of size 10 and an integer array intArr of size 20, and that modifies the contents of myList and intArr?

Which statement is true about the code snippet below?

Which one of the following is the correct code snippet for calculating the largest value in an integer array list aList?