WorksheetsComputer Science
Total questions: 25
Worksheet time: 19mins
In order to store letters in computer memory, what must they be encoded as?
Binary
ASCII
Java
Pseudocode
What is the name of google’s search algorithm?
RankPage
GoogleSearch
Spider
pagerank
An algorithm is
a step by step procedure of precision instructions
consists of selection, repetition and sequence control blocks
something that can solve any problem
a representation of an abstraction
What is the deciml value of 0011 0110 1011
512
875
1028
300
Binary string can represent
numbers
letters
colors
all of the above
A model of a complex system that includes only the details essential of the viewer is known as:
Algorithm
Animation
Inheritance
Abstraction
Unambiguous instructions for solving a problem or subproblem in a finite amount of time using a finite amount of data
Algorithm
Animation
Inheritance
Abstraction
Binary numbers expressed with two digits, 0 and 1
true
false
Which of the following values is the largest?
E816
19210
101 1012
1275
Octal is which type of numbering system?
base 2
base 10
base 16
base 8
We are increasingly being watched not by people, but by algorithms.
true
false
What are the advantages of algorithms?
No need to repeat work
Reusbility
Easier to change
All options are advantages
All algorithms can be constructed using what three basic parts?
sequence, selection, and standards
standards, iteration, and Sequence
iteration, standards, and selection
sequence, selection, and iteration
What is the first step in the software development process?
analyze requirements
code the design
design solutions
validate the design
Why do we separate our code into a number of shorter methods?
make it easier to read
Makes it run faster
So java know which order to execute the code
Sour code will look impressively complicated
Which of the following helps to decline computer science?
Computational thinking practices
Computer programming
Social impact on society
Problem solving
all of the above
Convert the decimal (base-10) number 20 to binary (base-2).
10110
10100
10001
11000
Which of the following binary (base-2) numbers is LARGEST?
11000000
10100000
10010000
10000001
Convert the binary (base-2) number 1001 to decimal (base-10)
5
8
9
12
How many total numbers can be represented with an 8-bit binary (base-2) system?
128
64
512
256
Your computer uses 4 bits to represent decimal numbers (0, 1, 2, 3 and so on) in binary. What is the SMALLEST number for which an overflow error occur?
16
32
64
128
Which of the following binary (base-2) numbers is LARGEST?
1001
1111
10001
1010
Bit is Binary Digit, the single unit of information in a computer.
true
false
Bit rate is the number of bits that are processed in a unit of time
true
false
Which of the following binary (base-2) numbers is LARGEST?
1111111111
1010010101
1111111110
10101000110
