Unit 1

Question 1

What type of code is typed into a .java file?

a. class file
b. source file
c. java file

Answer 1

b. source code

Question 2

Source code is compiled to produce what type of file for each class you define

a. .class file
b. .java file
c. .java.lang file

Answer 2

a. .class file

Question 3

One .class file must contain a method called _____ (which accepts only an array of Strings) which the Java Virtual Machine will call to start the program running

a. .class file
b. .java.lang file
c. main file

Answer 3

c. main file

Question 4

what is the correct term for the following

class Person

what is Person here?

Answer 4

identifier

Question 5

what is the correct term for the following

public static void main(String[] args)

what is static void here?

Answer 5

keywords

Question 6

a java program
is a collection of 1 or more __________?

a. methods
b. attributes
c. classes

Answer 6

c. classes

Question 7

1 java class MUST contain the method called __________

Answer 7

main method

Question 8

_________ never returns a value

a. void
b. static
c. return

Answer 8

a void

Question 9

_______ keyword is used only one per class, not one per object

a. void
b. int
c. static
d. boolean

Answer 9

c. static

Question 10

1 byte = ________ bits

Answer 10

8

Question 11

bits consists of

a. 1s and 1s
b. 0s and 1s
c. 0s and 0s

Answer 11

b. 0s and 1s

Question 12

A ________ value is a value which we directly type into the code

a. literal
b. direct
c. constant

Answer 12

a. literal

Question 13

‘\n ‘ precedented backslash is used for

a. previous line
b. new line
c. next string

Answer 13

b. new line

Question 14

what is the example of char

a. ‘\r’
b. 1
c. name
d. 1.0

Answer 14

a. ‘\r’

Question 15

what is this?
int myInteger = 5;

a. assignment
b. instantiation
c. declaration

Answer 15

c. declaration

Question 16

Words and sentences that are stored in memory can be considered as a sequence of individual characters in __________ class

a. integer class
b. main method
c. String class

Answer 16

c. String class

Question 17

pay *= 1.2 is equivalent to

a. pay * 1.2
b. pay * = pay * 1.2
c. pay = pay * 1.2

Answer 17

c. pay = pay * 1.2

Question 18

total = total + sub * sub;
is equivalent to

a. total +=sub * sub;
b. total = +sub * sub;
c. total = sub + sub * sub;

Answer 18

a. total +=sub * sub;

Question 19

total– is equivalent to

a. total = total - 1
b. total -1

Answer 19

a. total = total - 1

Question 20

a = 6;
b = ++a - 1;

then b =

a. b = 6
b. b = 7
c. b = 5

Answer 20

a. b = 6

Question 21

x + 3 <= y * 5

a. expression
b. variable

Answer 21

a. expression

Question 22

int a= 1, b= 2, c = 3, d ;

if ((a<b) || (c < a))
d = 10;
else
d = 20;

Answer 22

d= 10

Question 23

for (ctr = 1; ctr < 10; ctr ++){
System.out.print(ctr * ctr);
System.out.print(“ ”);

a. 1 4 9 16 25 36 49 64 81
b. 1 3 8 15 24 36 47 62 80
c. 1 4 9 16 25 35 48 64 81

Answer 23

a. 1 4 9 16 25 36 49 64 81

Question 24

which loop to use when the number of iterations is known

a. for loop
b. do while loop
c. case statement

Answer 24

a. for loop

Question 25

which loop runs at least once

Answer 25

do while loop

Question 26

int number = 1; marks[number] = 38; what index number will store 38? a. marks [0] b. marks[number] c. marks[1]

Answer 26

c. marks[1]

Question 27

public static void introduction() { String name = "Thomas"; int age = 40; System.out.println("My name is " + name + " and I am " + age + " years old."); } what is the name of the method?

Answer 27

introduction()