Term
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Definition
| a number or other value that appears directly in the source code. |
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Term
| How are conditionals evaluated? |
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Definition
Left -> Right
Example: Will stop at 1 > 2
if (3 < 4 || 1 > 2 || doge == null)
1>2 stops. |
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Term
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Definition
| int[] multiple = new int[8]; |
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Term
Convert this to an enchanced loop:
int[] primes = { 2, 3, 5, 7, 11, 13 };
for (int i = 0; i < primes.length; i++) {
System.out.println(primes[i]);
} |
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Definition
int[] primes = { 2, 3, 5, 7, 11, 13 };
for (int a : primes) {
System.out.println(a);
} |
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Term
| The code that calls the function is referred to as ..... |
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Definition
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Term
int counter = 0;
for (int index = 0; index < 10; index++) {
if (index > 4) {
continue;
counter--;
}
counter--;
}
What does this return/do? |
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Definition
| Line 5, Column 14: Statement is unreachable |
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Term
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Definition
| function name and the the list of arguments and types |
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Term
char[][] currentBoard =
{{'X', 'O', 'a'}, {'O', 'X', '.'}, {'O', '.', 'X'}};
how do I print 'a' from that? |
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Definition
| System.out.println(currentBoard[0][2]); |
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Term
int i = 10;
double d = 34.23;
i = d;
How do I make this work? |
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Definition
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Term
| Objects combine ___________ |
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Definition
| state (like variables) and behavior (like functions). |
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Term
Java classes _______________ be modified as the program runs
(insert blank) |
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Definition
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Term
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Definition
| the variable can read or written by methods defined on that class or its descendants… in any package |
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Term
| Java classes can access their parent’s constructor using _____. |
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Definition
the super keyword.
This must be the first thing done in a child constructor.
Example:
public class Pet {
protected String type;
Pet(String setType) {
this.type = setType;
}
}
public class Dog extends Pet {
private String breed;
Dog(String setBreed) {
super("Dog");
this.breed = setBreed;
}
} |
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Term
Object a = new Object("a");
Object b = a
Object c = new Object("a");
What does:
a == b result in?
a == c result in? |
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Definition
a == b is true.
a == c is false. |
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Term
| We can refer to a Java variable that refers to an object as a ______? |
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Definition
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Term
| References are objects, true or false? |
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Definition
FALSE.
See https://cs125.cs.illinois.edu/learn/references/#7
They just refer to the object, but are not object.
Kind of like a phone number |
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Term
Insertion Sort w/ Brief Example
Best/Worst Time
Space |
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Definition
1) Start at start
2) Sort next value
Example:
8 5 7 1 10
5 8 7 1 10
5 7 8 1 10
1 5 7 8 10
1 5 7 8 10
Worst O(n^2)
Best O(n)
Avg O(n^2)
Space:
O(1) |
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Term
| Write mergesort after having a merge() function. |
|
Definition
if (input.length == 1) {
return input;
}
int mid = input.length /2
int[] first = Arrays.copyOfRange(input, 0, mid);
in[] second = Arrays.copyOfRange(input, mid, input.length);
return merge(mergesort(first), mergesort(second)); |
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Term
| Space and time for mergesort |
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Definition
| Always O(nlogn) for time. Always O(n) for space. |
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Term
| Best sort on small array? |
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Definition
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Term
| What defines a stable/unstable sort? |
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Definition
Stable -> two items with the same value cannot switch positions
Unstable -> two items with the same value may switch positions |
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Term
| How many protocols are there limited on the internet? |
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Definition
| Many! Examples include http (web), smtp (email), dns (domain name service), or ynp (your protocol) |
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Term
| How to use query parameter in GET? How does it differ for multiple queries? |
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Definition
| Use the ? sign. Use the & sign for multiple. |
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Term
| What is the World Wide Web? |
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Definition
| A protocol (HTTP), a markup language (html), a styling language (CSS), a programming language (JS) |
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Term
| End to end principle (internet) |
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Definition
| Reliable delivery not guaranteed by core network. |
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Term
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Definition
| Determinism, Uniformity, Efficiency |
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Term
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Definition
Map a = new HashMap();
a.put("doge", 3);
sout(a.get("doge"));
// Prints 3 |
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Term
| Java exceptions are broken into three distinct categories. What are they? |
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Definition
| Checked exceptions, Unchecked exceptions, errors |
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Term
|
Definition
| public static void main(String[] unused) |
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