Intro to CS: Java - Chapter 4-6 Review

Question 1

What data type are int, char, and boolean?

Accepted Answer

primitive

Question 2

Given, int x = 2, int y = 7, and double z = 1.5. Find the value of z + y / x.

Accepted Answer

4.5

Question 3

A graphical application shows information inside a _______ object.

Accepted Answer

JFrame

Question 4

What would word1.compareTo(word2) < 0; return if word1 = "Bob" and word2 = "Ted"?

Accepted Answer

true

Question 5

What method is used to extract part of a string?

Accepted Answer

subString

Question 6

What is a problem with the following general code layout? if(x == 3)...if(x < 7)...if(x > 20)

Accepted Answer

Will execute first two segments if x is 3. What we want?, What happens if x is 10? Should have else at the end.

Question 7

What can be done to convert a value to a different type?

Accepted Answer

casting

Question 8

Which is the assignment operator in Java?

Accepted Answer

=

Question 9

What are methods that do not operate on an object?

Accepted Answer

static

Question 10

Given, int x = 2, int y = 7, and double z = 1.5. Find the value of y % x

Accepted Answer

1

Question 11

A predicate method is one that...

Accepted Answer

returns a boolean value

Question 12

The operators !, &&, and || are ______ operators.

Accepted Answer

boolean

Question 13

What operator tests the relationship between two values?

Accepted Answer

relational

Question 14

Given, int m = 2, int n = 7, double x = 1.5, double y = -3.1. Find: !(m > n) && (x > y)

Accepted Answer

true

Question 15

What class can be used to read input from a console window?

Accepted Answer

Scanner

Question 16

What type of variable is constant, once it is set, it can't be changed?

Accepted Answer

final

Question 17

Given this series, how many code segments would run? if (A), else if (B), else if (C), else (D)

Accepted Answer

just one, A, B, C, or D

Question 18

Lexicographical ordering is similar to alphabetical order, but things are ordered as follows...

Accepted Answer

numbers, capital letters, lowercase letters

Question 19

Which statement would return true if a number x was between an upper and lower number?

Accepted Answer

(x > lower) || (x < upper), (x > lower) && (x < upper)

Question 20

Which statement would be needed in order to use the Scanner class?

Accepted Answer

Scanner in = new Scanner(System.in);

Question 21

An object reference can have a value of ______ which means it is assigned no object.

Accepted Answer

null

Question 22

Which operator calculates the remainder for division of two integers?

Accepted Answer

%

Questions 22