Lecture 1

Question 1

Binary code?

Answer 1

0101010101000011

Question 2

Machine code?

Answer 2

9E 67 8F A4 4F BA

Question 3

Assembly?

Answer 3

mov eax, 4
mov ebx, 1
add eax, ebx
call printf

Question 4

High-level programming languages?

Answer 4

C, C++, C#, Java, Python, PHP, Go

Question 5

What is interpreting?

Answer 5

Translating one line of higher language code into machine code and executing it

Question 6

What is compiling?

Answer 6

Translating an entire program written in a higher level language into machine cod, so that it can be executed

Question 7

Which high-level programming languages are compiled for a certain platform?

Answer 7

C, C++, Haskell, Go

Question 8

What high-level programming languages are compiled into an intermediate format?

Answer 8

Java, C#, Scala

Question 9

Which high-level programming languages are interpreted?

Answer 9

Python, Ruby, PHP

Question 10

How is the intermediate format of Java called?

Answer 10

bytecode

Question 11

How are bytecode files executed?

Answer 11

by a virtual machine, the JVM

Question 12

What are the three different types of high-level programming languages?

Answer 12

• Compiled for a specific platform
• Compiled into an intermediate format, so that they can be executed on any platform
• Interpreted

Question 13

What data types, do the java primitive data types cover?

Answer 13

Booleans,
integers,
floating-point numbers,
characters

Question 14

What are the two types of data in Java

Answer 14

Primitive and reference

Question 15

What binary number representation does java use for integers?

Answer 15

Two’s complement

Question 16

How are 32-bit real numbers stored?

How many bits are used for which values?

Answer 16

Floating-point. 
1 bit for sign,
8 for exponent,
23 for mantissa
sign X mantissa x 2^exponent

Question 17

How many primitive data types does java have?

Answer 17

8

Question 18

What primitive data types does java have?

Answer 18

boolean, byte, short, int, long, float, double, char

Question 19

How many bits is a boolean and what can this represent?

Answer 19

1, true/false

Question 20

how many bits is a byte and what can it represent

Answer 20

8, integers

Question 21

how many bits is a short and what can it represent

Answer 21

16, integers

Question 22

how many bits is an int and what can it represent?

Answer 22

32, integers

Question 23

how many bits is a long and what can it represent?

Answer 23

64, integers

Question 24

how many bits is a float and what can it represent?

Answer 24

32, real numbers

Question 25

How many bits is a double and what can it represent?

Answer 25

64, real numbers

Question 26

What is the standard java type for real numbers?

Answer 26

double

Question 27

What is the standard java data type for integers?

Answer 27

int

Question 28

How many bits is a char?

Answer 28

16 (ASCII VALUE?)