Question 1

Assume the method doSomething has been defined as follows:   What does the method do?

Accepted Answer

A) It copies the integer array values to a new array. 
B) It swaps the integer values stored in positions p1 and p2 of the array values. 
C) It moves each element of the array values to a higher index position. 
D) It overwrites the value stored in the integer array values at position p1 with the value stored in position p2. 
A) It copies the integer array values to a new array. 
B) It swaps the integer values stored in positions p1 and p2 of the array values. 
C) It moves each element of the array values to a higher index position. 
D) It overwrites the value stored in the integer array values at position p1 with the value stored in position p2.

Question 2

Java 7 introduced enhanced syntax for declaring array lists, which is termed

Accepted Answer

A) angle brackets. 
B) method lists. 
C) diamond syntax. 
D) symmetric slants. 
A) angle brackets. 
B) method lists. 
C) diamond syntax. 
D) symmetric slants.

Question 3

Complete the following code snippet with the correct enhanced for loop so it iterates over the array without using an index variable.

Accepted Answer

A) for (String str : arr) 
B) for (str : String arr) 
C) for (str[] : arr) 
D) for (arr[] : str) 
A) for (String str : arr) 
B) for (str : String arr) 
C) for (str[] : arr) 
D) for (arr[] : str)

Question 4

What will be printed by the statements below?

Accepted Answer

A) 7 5 6 4 
B) 7 6 5 4 
C) 7 5 6 7 
D) 4 5 6 4 
A) 7 5 6 4 
B) 7 6 5 4 
C) 7 5 6 7 
D) 4 5 6 4

Question 5

Assume the array of integers values has been created and process is a method that has a single integer parameter.Which of the following is equivalent to the loop below?

Accepted Answer

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

Question 6

What is the result of the following code?

Accepted Answer

A) The elements of the array values are initialized to zero. 
B) The elements of the array element are initialized to zero. 
C) The first element of the array values is initialized to zero. 
D) The array values is not modified. 
A) The elements of the array values are initialized to zero. 
B) The elements of the array element are initialized to zero. 
C) The first element of the array values is initialized to zero. 
D) The array values is not modified.

Question 7

When the order of the elements is unimportant, what is the most efficient way to remove an element from an array?

Accepted Answer

A) Delete the element and move each element after that one to a lower index. 
B) Replace the element to be deleted with the last element in the array. 
C) Replace the element to be deleted with the first element in the array. 
D) Replace the element with the next element. 
A) Delete the element and move each element after that one to a lower index. 
B) Replace the element to be deleted with the last element in the array. 
C) Replace the element to be deleted with the first element in the array. 
D) Replace the element with the next element.

Question 8

What (if anything) is wrong with the following code snippet, which searches for the searchedValue variable in the array data?

Accepted Answer

A) There is nothing wrong. 
B) There is a compile-time error. 
C) There is a bounds error. 
D) There is a logic error. 
A) There is nothing wrong. 
B) There is a compile-time error. 
C) There is a bounds error. 
D) There is a logic error.

Question 9

What is the output of the following code snippet?

Accepted Answer

A) 24 0 30 16 
B) 24 0 30 6 
C) 24 7 30 16 
D) 24 16 24 16 
A) 24 0 30 16 
B) 24 0 30 6 
C) 24 7 30 16 
D) 24 16 24 16

Question 10

Which one of the following statements is correct about the given code snippet?

Accepted Answer

A) The for loop initializes all the elements of the array. 
B) The for loop initializes all the elements except the first element. 
C) The for loop initializes all the elements except the last element. 
D) The for loop initializes all the elements except the first and last elements. 
A) The for loop initializes all the elements of the array. 
B) The for loop initializes all the elements except the first element. 
C) The for loop initializes all the elements except the last element. 
D) The for loop initializes all the elements except the first and last elements.

Question 11

What will be printed by the statements below?

Accepted Answer

A) [Annie, Bob, Charles, Annie, Bob, Charles] 
B) [Annie, Bob, Charles, Charles, Bob, Annie] 
C) [Annie, Annie, Bob, Bob, Charles, Charles] 
D) [Annie, Bob, Charles, Bob, Charles] 
A) [Annie, Bob, Charles, Annie, Bob, Charles] 
B) [Annie, Bob, Charles, Charles, Bob, Annie] 
C) [Annie, Annie, Bob, Bob, Charles, Charles] 
D) [Annie, Bob, Charles, Bob, Charles]

Question 12

Which code snippet calculates the sum of all the elements in even positions in an array?

Accepted Answer

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

Question 13

Consider the code snippet below:   When the loop finishes what does the value of the boolean variable found indicate?

Accepted Answer

A) the size of the array values 
B) whether or not the value 42 was found in the array 
C) whether or not the value 0 was found in the array 
D) the position where the value 42 is located in the array 
A) the size of the array values 
B) whether or not the value 42 was found in the array 
C) whether or not the value 0 was found in the array 
D) the position where the value 42 is located in the array

Question 14

When an array myArray is only partially filled, how can the programmer keep track of the current number of elements?

Accepted Answer

A) access myArray.length() 
B) maintain a companion variable that stores the current number of elements 
C) access myArray.currentElements() 
D) access myArray.length() - 1 
A) access myArray.length() 
B) maintain a companion variable that stores the current number of elements 
C) access myArray.currentElements() 
D) access myArray.length() - 1

Question 15

Which statement is true about the code snippet below?

Accepted Answer

A) The final size of names is 2; the final size of friends is 3. 
B) The final size of names is 3; the final size of friends is 2. 
C) The final size of names is 3; the final size of friends is 3. 
D) compilation error 
A) The final size of names is 2; the final size of friends is 3. 
B) The final size of names is 3; the final size of friends is 2. 
C) The final size of names is 3; the final size of friends is 3. 
D) compilation error

Question 16

Consider the following code snippet:   What is the output of the given code snippet?

Accepted Answer

A) 00 
B) 31 
C) 30 
D) 03 
A) 00 
B) 31 
C) 30 
D) 03

Question 17

Which one of the following is a valid signature of a method with an integer two-dimensional array parameter of size 10 x 10?

Accepted Answer

A) public void func(int[][] arr) 
B) public void func(int[10][] arr) 
C) public void func(int[][10] arr) 
D) public void func(int[10][10] arr) 
A) public void func(int[][] arr) 
B) public void func(int[10][] arr) 
C) public void func(int[][10] arr) 
D) public void func(int[10][10] arr)

Exam 7: Arrays and Array Lists

Assume the method doSomething has been defined as follows: What does the method do?

Java 7 introduced enhanced syntax for declaring array lists, which is termed

Complete the following code snippet with the correct enhanced for loop so it iterates over the array without using an index variable.

What will be printed by the statements below?

Assume the array of integers values has been created and process is a method that has a single integer parameter.Which of the following is equivalent to the loop below?

What is the result of the following code?

When the order of the elements is unimportant, what is the most efficient way to remove an element from an array?

What (if anything) is wrong with the following code snippet, which searches for the searchedValue variable in the array data?

What is the output of the following code snippet?

Which one of the following statements is correct about the given code snippet?

What will be printed by the statements below?

Which code snippet calculates the sum of all the elements in even positions in an array?

Consider the code snippet below: When the loop finishes what does the value of the boolean variable found indicate?

When an array myArray is only partially filled, how can the programmer keep track of the current number of elements?

Which statement is true about the code snippet below?

Consider the following code snippet: What is the output of the given code snippet?

Which one of the following is a valid signature of a method with an integer two-dimensional array parameter of size 10 x 10?

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