SPRING 2020 CSIS 212-B01 LUO

SPRING 2020 CSIS 212-B01 LUO

• Question 1

• out of 3 points

Which software product release category is "generally feature complete and supposedly bug free, and ready for use by the community?"

Selected Answer: Release candidate.

• Question 2

• out of 3 points

Which of the following statements is false?

Selected

Answer:

Today’s fastest Internet speeds are on the order of trillionsof bits per second with quadrillion-bit-per-second speeds on the horizon.

• Question 3

• out of 3 points

Which of the following statements is false?

Selected Answer: Each class can be used only once to build many objects.

• Question 4

• out of 3 points

Which of the following statements is false?

Selected

Answer:

A quadrillion-instruction-per-section computer can perform in one second more than 100,000 instructions for every person on the planet.

• Question 5

• out of 3 points

Which of the following statements is false?

Selected

Answer:

Android—the fastest-growing mobile and smartphone operating system—is based on the Windows kernel and uses Java.

• Question 6

• out of 3 points

________ involves reworking programs to make them clearer and easier to maintain while preserving their correctness and functionality.

Selected Answer: Refactoring

• Question 7

• out of 3 points

________ models software in terms similar to those that people use to describe real- world objects.

Selected Answer: Object-oriented design

• Question 8

• out of 3 points

Which of the following statements is true?

Selected Answer: The Internet is just a network of computers.

• Question 9

• out of 3 points

All import declarations must be placed

Selected Answer: before the class declaration.

• Question 10

• out of 3 points

Which of the following is a variable declaration statement?

Selected Answer: int total;

• Question 11

• out of 3 points

Which of the following does not contain a syntax error?

Selected Answer: System.out.println("Hello

world!");

• Question 12

• out of 3 points

Which of the following statements does not alter the value stored in a memory location?

Selected Answer: int a;

• Question 13

• out of 3 points

Each of the following is a relational or equality operator except:

Selected Answer: =!

• Question 14

• out of 3 points

When method printf requires multiple arguments, the arguments are separated with

________.

Selected Answer: commas (,).

• Question 15

• out of 3 points

Which of the following cannot cause a syntax error to be reported by the Java compiler?

Selected Answer: An extra blank line.

• Question 16

• out of 3 points

Which of the following statements would display the phase Java is fun?

Selected Answer: System.out.println("hellois fun\rJava ");

• Question 17

• out of 3 points

Which of the following statements is false?

Selected

Answer:

Each class declaration that begins with the access modifier private must be stored in a file that has the same name as the class and ends with the .java filename extension.

• Question 18

• out of 3 points

Floating-point literals are of type ________ by default.

Selected Answer: double

• Question 19

• out of 3 points

An import declaration is not required if you always refer to a class with its ________ name, which includes its package name and class name.

Selected Answer: fully qualified name

• Question 20

• out of 3 points

Which of the following statements is true?

Selected

Answer:

Every instance variable has a default initial value—a value provided by Java when you do not specify the instance variable’s initial value.

• Question 21

• out of 3 points

Which of the following statements is false?

Selected

Answer:

To distinguish a constructor from a class’s operations, the UML places the word “constructor” between double quotes before the constructor’s name.

• Question 22

• out of 3 points

The format specifier %.2f specifies that two digits of precision should be output ________ in the floating-point number.

Selected Answer: to the right of the decimal point

• Question 23

• out of 3 points

Types in Java are divided into two categories. The primitive types are boolean, byte, char, short, int, long, float and double. All other types are ________ types.

Selected Answer: reference

• Question 24

• out of 3 points

Java requires a ________ call for every object that’s created.

Selected Answer: constructor

• Question 25

• out of 3 points

Which of the following statements about the conditional operator (?:) is false?

Selected

Answer:

The second operand is the result value if the condition evaluates to false.

• Question 26

• out of 3 points

What is the size in bits of an int?

Selected Answer: 32

• Question 27

• out of 3 points

Which primitive type can hold the largest value?

Selected Answer: double

• Question 28

• out of 3 points

Which of the following statements is true?

Selected

Answer:

Logic errors are caught by the compiler. Syntax errors have effects at execution time.

• Question 29

• out of 3 points

How many times is the body of the loop below executed?int counter = 1;

while (counter > 20) {