Computer Science I
Textbook Exam Questions
Course Introduction
Computer Science I is an introductory course designed to provide students with a foundational understanding of computer science concepts and programming principles. The course covers topics such as algorithms, data types, control structures, problem-solving techniques, and software development. Through hands-on programming assignments often using languages like Python or Java students will learn how to design, implement, test, and debug basic programs. This course emphasizes logical thinking, computational problem solving, and the development of efficient, readable, and maintainable code, preparing students for more advanced study in the field.
Recommended Textbook
Starting Out with Java From Control Structures through Data Structures 2nd Edition by Tony Gaddis
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Chapter 1: Introduction to Computers and Java
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Sample Questions
Q1) A runtime error is usually the result of:
A) A logical error
B) A syntax error
C) A compilation error
D) Bad data
Answer: A
Q2) Byte code instructions are:
A) Another name for source code
B) Syntax errors
C) Machine code instructions
D) Read and interpreted by the JVM
Answer: D
Q3) When an object's internal data is hidden from outside code and access to that data is restricted to the object's methods,the data is protected from accidental corruption.
A)True
B)False
Answer: True
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Chapter 2: Java Fundamentals
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Sample Questions
Q1) Variables are classified according to their
A) value
B) data type
C) names
D) location in the program
Answer: B
Q2) In Java the variable named one is the same as the variable named One.
A)True
B)False
Answer: False
Q3) A Java program must have at least one of these:
A) Class definition
B) Variable
C) Comment
D) System.out.println();statement
Answer: A
Q4) All Java statements end with semicolons.
A)True
B)False
Answer: False
Page 4
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Chapter 3: Decision Structures
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Sample Questions
Q1) Which of the following correctly tests the char variable chr to determine whether it is not equal to the character B?
A) if (chr > 'B')
B) if (chr < 'B')
C) if (chr != 'B')
D) if (chr != "B")
Answer: C
Q2) When testing for character values,the switch statement does not test for the case of the character.
A)True
B)False
Answer: False
Q3) If chr is a character variable,which of the following if statements is written correctly?
A) if (chr = "a")
B) if (chr == "a")
C) if (chr = 'a')
D) if (chr == 'a')
Answer: D
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Chapter 4: Loops and Files
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Sample Questions
Q1) Which of the following are pre-test loops?
A) while,for,do-while
B) while,do-while
C) while,for
D) for,do-while
Q2) The do-while loop must be terminated with a semicolon.
A)True
B)False
Q3) A loop that executes as long as a particular condition exists is called a(n)
A) sentinel loop
B) conditional loop
C) count-controlled loop
D) infinite loop
Q4) When you pass the name of a fi le to the PrintWriter constructor,and the file already exists,it will be erased and a new empty file with the same name will be created.
A)True
B)False
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Chapter 5: Methods
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Sample Questions
Q1) What will be returned from the following method? public static int methodA()
{ Double a = 8.5 + 9.5; Return a;
} A) 18.0
B) 18 (as an integer)
C) 8.0
D) This is an error
Q2) What will be returned from the following method? public static double methodA()
{
Double a = 8.5 + 9.5;
Return a; }
A) 18.0
B) 18 (as an integer)
C) 8
D) This is an error
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Chapter 6: A First Look at Classes
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Sample Questions
Q1) Two or more methods in a class may have the same name as long as
A) they have different return types
B) they have different parameter lists
C) they have different return types,but the same parameter list
D) you cannot have two methods with the same name
Q2) A class specifies the ________ and ________ that a particular type of object has.
A) relationships;methods
B) fields;object names
C) fields;methods
D) relationships;object names
Q3) The scope of a public instance field is
A) only the class in which it is defined
B) inside the class,but not inside any method
C) inside the parentheses of a method header
D) the instance methods and methods outside the class
Q4) Instance methods should be declared static.
A)True
B)False
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Chapter 7: A First Look at Gui Applications
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Sample Questions
Q1) Which of the following statements is not true?
A) Radio buttons are round and check boxes are square.
B) Radio buttons are often grouped together and are mutually exclusive;Check boxes are not
C) Radio buttons and check boxes both implement the ActionListener interface
D) They are all true
Q2) If button1 is a JButton object,which of the following statements will make its background blue?
A) button1.makeBackground(BLUE);
B) button1.setBackground(Color.BLUE);
C) button1.makeBackground(Color.BLUE);
D) button1.set.Background(BLUE);
Q3) When this is the argument passed to the JFrame class's setDefaultCloseOperation()method,the application is hidden,but not closed.
A) HIDE_ON_CLOSE
B) JFrame.HIDE_ON_CLOSE
C) JFrame.EXIT_ON_CLOSE
D) JFrame.HIDE_NOT_CLOSE
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Chapter 8: Arrays and the Arraylist Class
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Sample Questions
Q1) You can use this ArrayList class method to replace an item at a specific location in an ArrayList.
A) replace
B) add
C) store
D) set
Q2) Which of the following is a correct method header for receiving a two-dimensional array as an argument?
A) public static void passArray(int[1,2])
B) public static void passArray(int [][])
C) public static void passArray(int[1],[2])
D) public static void passArray(int[],int[])
Q3) The String[] args parameter in the main method header allows the program to receive arguments from the operating system command-line.
A)True
B)False
Q4) Java limits the number of dimensions that an array may have to 15.
A)True
B)False
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Chapter 9: A Second Look at Classes and Objects
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Sample Questions
Q1) If the this variable is used to call a constructor,
A) a compiler error will result,if it is not the first statement of the constructor.
B) a compiler error will result,if it is the first statement of the constructor.
C) nothing will happen.
D) The this variable cannot be used as a constructor call.
Q2) When the this variable is used to call a constructor,
A) it must be the first statement in the constructor making the call
B) it must be the last statement in the constructor making the call
C) it can be anywhere in the constructor making the call
D) You cannot use the this variable in a constructor call.
Q3) A deep copy of an object
A) is an assignment of that object to another object
B) is an operation that copies an aggregate object,and all the objects it references
C) is a bogus term,it has no meaning
D) is always a private method
Q4) An enumerated data type is actually a special type of class.
A)True
B)False
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Page 11
Chapter 10: Text Processing and More About Wrapper
Classes
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Sample Questions
Q1) For the following code,how many times would the while loop execute? StringTokenizer strToken = New StringTokenizer("Ben and Jerry's ice cream is great."); While (strToken.hasMoreTokens()) { System.out.println(strToken.nextToken());
}
A) 1
B) 3
C) 5
D) 7
Q2) What will be the value of matches after the following code is executed? boolean matches; String[] productCodes = {"456HI345","3456hj"}; Matches = productCodes[0].regionMatches(true,1, ProductCodes[1],2,3);
A) 56H B) 56h
C) true
D) false
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Chapter 11: Inheritance
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Sample Questions
Q1) In the following statement,which is the interface? public class ClassA extends ClassB implements ClassC
A) ClassA
B) ClassB
C) ClassC
D) Cannot tell
Q2) Look at the following code and determine what the call to super will do. public class ClassB extends ClassA { Public ClassB() { Super(10); } }
A) This cannot be determined form the code shown.
B) It will call the constructor of ClassA that receives an integer as an argument.
C) It will call the method named super and pass the value 10 to it as an argument.
D) The method super will have to be defined before we can say what will happen.
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Chapter 12: Exceptions and Advanced File Io
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Sample Questions
Q1) Classes that inherit from the Error class are
A) for exceptions that are thrown when a critical error occurs,and the application program should not try to handle them.
B) for exceptions that are thrown when a critical error occurs,and the application program should try to handle them.
C) for exceptions that are thrown when an IOException occurs,and the application program should not try to handle them.
D) for exceptions that are thrown when an IOException error occurs,and the application program should try to handle them.
Q2) If a random access file contains a stream of characters,which of the following would you use to set the pointer on the fifth character?
A) file.seek(4);
B) file.seek(5); C) file.seek(9);
D) file.seek(8);
Q3) The throws clause causes an exception to be thrown.
A)True
B)False
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Chapter 13: Advanced Gui Applications
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Sample Questions
Q1) Which of the following statements creates a horizontal slider component with a minimum value of 0,a maximum value of 50,and an initial value of 25?
A) JSlider slider = New JSlider(0,50,25,JSlider.HORIZONTAL);
B) JSlider slider = New JSlider(JSlider.HORIZONTAL,0,50,25);
C) JSlider slider = New JSlider(JSlider.HORIZONTAL,25,0,50);
D) JSlider slider = New JSlider(JSlider.HORIZONTAL,50,0,25);
Q2) When you create an instance of the JList class,
A) you pass an array of objects to the constructor.
B) the list has a default selection mode of Single Selection Mode.
C) the values in the list are automatically sorted.
D) you must indicate the maximum number of list items the user may select at any one time.
Q3) You can create a label with an image,or with both an image and text.
A)True B)False
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Page 15
Chapter 14: Applets and More
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Sample Questions
Q1) The delay parameter in the Timer constructor is the amount of time between action events,measured in milliseconds.
A)True
B)False
Q2) In the link produced by the following HTML,what word would you click to go to the linked location? Click here to learn more about < a href="http://www.applications.com" >applications.< /a >
A) Click
B) here
C) Click here to learn more about D) applications
Q3) Given the following code,how many times per second will the TimerListener event be generated? Timer timer = new Timer(1000,new TimerListener());
A) 1
B) 10
C) 100
D) 1000
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Chapter 15: Recursion
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Sample Questions
Q1) How many times will the following method call itself,if 10 is passed as the argument? public static void message(int n)
{ If (n < 0)
{ System.out.println("Print this line. \ n");
Message(n + 1);
A) 0
B) 9
C) 10
D) An infinite number of times
Q2) Which of the following problems cannot be programmed recursively?
A) Towers of Hanoi
B) Summing a range of array elements
C) Finding the greatest common divisor
D) All of the above can be programmed recursively
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Chapter 16: Sorting, Searching, and Algorithm Analysis
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Sample Questions
Q1) If a[ ] is an array of integers,the pseudo code
Int k = 0
Int m = 1
While m < a.length If a[m] < a[k] Then K = m
End If M = m+1
End While
Describes a strategy for
A) sorting an array in ascending order
B) sorting an array in descending order
C) implementing a part of the logic for bubble sort
D) determining the location of the smallest value in the array
Q2) The two criteria most often used to measure the efficiency of an algorithm are
A) efficiency and style
B) space and time
C) style and time
D) execution and speed
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Chapter 17: Generics
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Sample Questions
Q1) When a generic method is called,
A) the programmer must explicitly specify the actual types to use for the type parameters
B) the compiler determines the actual types to use for the type parameters from the context
C) the compiler uses information explicitly specified by the programmer,if available;otherwise,the type defaults to Object
D) None of the above
Q2) Let Point< T > be a generic type.We want to write a method that takes as parameter Point objects whose type parameter is the Number class,or any subclass of Number.We can do this by declaring the type of the method parameter as
A) Point< Number >
B) Point< ? super Number >
C) Point< ? extends Number >
D) Point< ? sub Number >
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Chapter 18: Collections
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Sample Questions
Q1) LinkedHashSet differs from HashSet because
A) the LinkedHashSet stores objects that have the same hash code in the same bucket
B) the LinkedHashSet is a subclass of TreeSet
C) the LinkedHashSet allows elements to be retrieved in the same order as they were added
D) the LinkedHashSet is a subclass of LinkedList
Q2) Which of the following is true?
A) Both the Set and List interfaces extend the Collection interface
B) Both the Set and Map interfaces extend the Collection interface
C) Both the List and Map interfaces extend the Collection interface
D) None of the above
Q3) When the next( )method of Iterator is called at the end of a collection,it
A) throws NoSuchElementException
B) returns null
C) wraps around to the beginning of the collection and returns the first element
D) returns the a copy of the last element returned
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Chapter 19: Array-Based Lists
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Sample Questions
Q1) A constructor for an array-based list takes an integer parameter,to be used as the capacity of the internal array of the list.Which exception should the constructor throw if its parameter is zero or negative?
A) IllegalArgumentException
B) IllegalStateException
C) RuntimeException
D) NullPointerException
Q2) Assume an array-based list implemented by a class that uses the fields String [ ] list; int nElements; to represent the array of elements,and the number of elements currently stored.Show the code for a method void clear()that removes all elements from the list.
Q3) The position of an item within a list is called its A) index
B) rank C) level
D) number
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21
Chapter 20: Linked Lists
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Sample Questions
Q1) A doubly linked list makes it easy to
A) move from any node to its successor,and from any node to its predecessor
B) skip two nodes at a time when moving forward through the list
C) skip two nodes at a time when moving backward through the list
D) to create a second copy of the linked list
Q2) In a linked list,the successor of a node X
A) may not exist
B) is the node that comes after X,and it always exists
C) is the last node in the list
D) is the node whose index is one greater than the index of X
Q3) A linked list class keeps its elements in the order in which they are added,with the index of an element X being greater than the index of any element added to the list before X.Addition of new elements to such a list can be made more efficient
A) by keeping a reference to the element with the least index
B) by starting at the head,and quickly traversing the list to locate the place where a new element should be added
C) by keeping a reference to the last element added
D) None of the above
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Chapter 21: Stacks and Queues
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Sample Questions
Q1) A queue is a container that allows elements to be stored and removed
A) in a last-in-first-out fashion
B) in a first-in-first-out fashion
C) in a first-in-last-out fashion
D) quickly and efficiently
Q2) A queue invariant is a condition
A) obeyed by queues that need to remain constant
B) that is required to be true after the execution of each queue class method
C) that is more stringent than invariants for other types of collections
D) that is true regardless of the actual type used to instantiate a generic queue.
Q3) The stack pop operation
A) removes all items currently on the stack
B) extracts one element from the stack and returns it
C) removes from the stack the number of elements specified by its integer parameter D) does not exist: There is no such stack operation
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Chapter 22: Binary Trees, Avl Trees, and Priority Queues
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Sample Questions
Q1) To find the minimum node in a binary search tree
A) you should start at the root,and then keep passing from each node to its left child until you come to a node with no left child
B) you should start at the root,and then keep passing from each node to its right child until you come to a node with no right child
C) you should look at the root of the binary tree
D) you need to examine every node,and then pick the one with the least value
Q2) The depth of a binary tree
A) is the length of the longest path from the root to a leaf
B) is the length of the shortest path from the root to a leaf
C) is the total number of leaves in the tree
D) is the depth of one of the subtrees plus one
Q3) A binary tree traversal method that recursively traverses the left subtree,then visits the root,then traverses the right subtree is called
A) root-centric traversal
B) priority order traversal
C) postorder traversal
D) inorder traversal
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