Test Review CSC 115 Midterm 1

Question 1

How to print in Java?

Answer 1

System.out.println()

Question 2

What does a Java program always start with?

Answer 2

Class Declaration with Class name(public class _____)

Question 3

What is the equivalent of functions(blocks of code) in Java?

Answer 3

Methods

Question 4

Allows us to convert a value from one type to another

Answer 4

Casting

Question 5

Converting a variable to another of higher precision

Answer 5

Implicit casting

Example:
int i = 4;
double j = i; // j is 4.0

Question 6

Forcing the conversion of a variable to a specified type

Answer 6

Explicit casting

Example:
double x = 4.95; // x is 4.95
int y = (int) x; // y is 4

Question 7

How to declare Methods?

Answer 7

public static <returnType> <name> (<parameters>) {
statement inside method;
}</parameters></name></returnType>

Question 8

“and” operator

Answer 8

&&

Question 9

“or” operator

Answer 9

||

Question 10

1. Always execute the block of code once
2. and continue to execute the block of code as long as a specified condition is met

Answer 10

do-while loops

Question 11

How to declare an array if we know what values to put in it?

Answer 11

type[] name = {<comma>};</comma>

Question 12

How to declare an array if we don’t know what values to put in it(only know the size or know nothing at all)?

Answer 12

type[] name = new type[<size>];</size>

Question 13

What can we use to determine the length of an array?

Answer 13

int[] numsArray = {7, 9, 6, 4};
System.out.println(numsArray.length); //outputs 4

Question 14

How to declare Multi-dimensional Arrays?

Answer 14

int c[][] = new int[3][4];
or
int c[][] = {{1, 2}, {3, 4, 5}, {6, 7}, {8, 9, 10}};

Question 15

Error caused by improperly formatted code(missing semicolons/wrong capitalizations)

Answer 15

Syntax errors

Question 16

Error caused by the incorrect way we are trying to
use a variable or object (out of bound indexes for arrays)

Answer 16

Runtime errors