Cs 142 Final Review
CS 142 Finals Review
- 1.The programs that computer executes are called
- A.
Programming languages
- B.
Software
- C.
Integrated development environment
- D.
Browsers
- 2.The ENIAC computer was build from which components:
- A.
Integrated circuits
- B.
Flash memory
- C.
Transistors
- D.
Vacuum tubes
- 3.The Java code on the Internet and that are run by Web browsers are called:
- A.
Scripts
- B.
Applets
- C.
Databases
- D.
Style sheets
- 4.The free Java modules that perform various specific tasks and that make Java arich and portable language are called:
- A.
Library packages
- B.
Portlets
- C.
Servlets
- D.
Style sheets
- 5.Which one of the following statements is true about a Java compiler?
- A.
It translates the object code into the source code.
- B.
It translates the library code into the virtual machine code.
- C.
It translates the source code into the virtual machine code.
- D.
It translates the virtual machine code into the source code.
- 6.Which one of the following programs can execute Java class files?
- A.
Assembler
- B.
Linker
- C.
Editor
- D.
Virtual machine
- 7.Is there anything wrong with this code?System.out.print("3 + 3 =")System.out.println(3 + 3);
- A.
Compile-time error
- B.
Run-time error
- C.
Programming error
- D.
No error
- 8.Java can be used to develop rich applications for the Web that are called
- A.
Operating systems
- B.
Applets
- C.
Libraries
- D.
Cookies
- 9.A major difference between C++ and Java is that:
- A.
C++ is a high-level, while Java is a low-level language
- B.
C++ is designed for consumers, while Java is designed for commerce
- C.
C++ is object-oriented, while Java is not
- D.
C++ is not portable, while Java is portable
- 10.An example of a Java integrated development environment is:
- A.
NetBeans
- B.
Turbo Pascal
- C.
Visual Studio .NET
- D.
PHP
- 11.A Java class with the name Printer has to be saved using the source file name:
- A.
Printer.java
- B.
Printer.java
- C.
Printer.txt
- D.
Printer.java
- 12.This statement starts the declaration of a class in Java:
- A.
Public static void main(String[] args)
- B.
Public class Classname
- C.
System.out.println("Hello, World!");
- D.
Java class
- 13.This Java statement prints a blank line:
- A.
Public static void main(String[] args)
- B.
System.out.print();
- C.
System.out.println();
- D.
System.out.Println();
- 14.Which Java statement does not contain an error?
- A.
System.out.print(;
- B.
System.out.print()
- C.
System.out.printl();
- D.
System.out.printl();
- 15.In order to run Java programs on a computer, the computer needs to have softwarecalled a(n):
- A.
Assembler
- B.
Virtual machine
- C.
Windows
- D.
Debugger
- 16.The Java statement "public static void main(String[] args)" declares a :
- A.
Class
- B.
Variable
- C.
Constant
- D.
Method
- 17.What is the output of the following code snippet?System.out.print("Hello");System.out.println("Good Day!");
- A.
Hello Good Day!
- B.
Hello Good Day!
- C.
HelloGood Day!
- D.
No output due to compilation errors
- 18.What is the purpose of the following algorithm?num = 0Repeat the following steps for 100 timesinput var1if var1 > numnum = var1print num
- A.
To find the highest among 100 numbers
- B.
To print out the 100 numbers
- C.
To find the smallest among 100 numbers
- D.
To search for a particular number among 100 numbers
- 19.Consider the following pseudocode. What does it produce?Create a list of consecutive integers from two to n: (2, 3, 4, ..., n).Initially, let p equal 2.Repeat following steps until p2 is greater than n.Strike from the list all multiples of p less than or equal to n.Find the first number remaining on the list greater than p; replace p with thisnumber.
- A.
All even numbers from 2 to n
- B.
All Fibonacci numbers from 2 to n
- C.
All prime numbers from 2 to n
- D.
All factorial numbers from 2 to n
- 20.What operation is least efficient in an ArrayList?
- A.
Add element to the middle of the list
- B.
Linear traversal step
- C.
Read element
- D.
Modify element
- 21.Which data structure would best be used for keeping track of bank customerswaiting for a teller?
- A.
Queue
- B.
Stack
- C.
List
- D.
Array
- 22.What must be included in a LinkedList class node?I a reference to the next nodeII a reference to the previous nodeIII a data element
- A.
I
- B.
I and II
- C.
III
- D.
I, II, and III
- 23.Assuming that staff is a LinkedList object, what is the content and iteratorposition in the staff object?public static void main(String[] args){LinkedList staff = new LinkedList();staff.addLast("Diana");staff.addLast("Tom");staff.addLast("Harry");staff.addLast("Romeo");// | in the comments indicates the iterator positionListIterator iterator = staff.listIterator(); // |DTHRiterator.next();iterator.next();iterator.add("Juliet");iterator.add("Nina");iterator.previous();iterator.remove();…}
- A.
DTJNHJ
- B.
DTN|HR
- C.
DT|JHR
- D.
DTJ|HR
- 24.Which method in the ListIterator class cannot be called twice in a row?
- A.
Previous
- B.
Remove
- C.
Next
- D.
There is no restriction
- 25.Why is it important to understand the underlying implementations of data structuretypes?(e.g. HashSet, TreeSet, ArrayList, LinkedList, etc.)
- A.
It helps you choose a better coding implementation
- B.
It helps you choose a data structure with best efficiency in all operations
- C.
It helps you choose a data structure with best efficiency in operations you need most
- D.
Nothing, because we do not know about implementation details
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