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WorksheetsOCR J275 - Data Representation
Total questions: 23
Worksheet time: 12mins
Name
Class
Date
1.
Computers use binary because they have circuits which are either on or off, which gives them two states to work from to make calculations and run processes - True or False?
a)
True
b)
False
2.
Which is the smallest storage unit in a computer?
a)
Bit
b)
Megabyte
c)
Nibble
d)
Terabyte
3.
How many bits are in a nibble?
a)
2 bits
b)
4 bits
c)
6 bits
d)
8 bits
4.
How many bytes are in a kilobyte?
a)
2
b)
124
c)
1024
d)
102440
5.
How many kilobytes are in megabyte?
a)
600
b)
1001
c)
1008
d)
1024
6.
How many megabytes are in a gigabyte?
a)
750
b)
1024
c)
2000
d)
20024
7.
How many gigabytes are in a terabyte?
a)
1024
b)
1016
c)
1098
d)
999
8.
What is the denary value?
a)
59
b)
64
c)
160
d)
192
9.
Value?
a)
84
b)
168
c)
76
d)
96
10.
Convert the denary value 56 into an 8-bit binary number
a)
11000000
b)
00001111
c)
00111000
d)
01010101
11.
Convert the denary value 112 into an 8-bit binary number
a)
01110000
b)
11000000
12.
What is the largest number you can represent with 8 bits?
a)
64
b)
128
c)
200
d)
255
13.
Explain what is meant by machine code or machine language
a)
Instructions executed by CPU in binary format
b)
A menomic used to represent an opcode.
c)
A language written using language humans understand.
d)
A group of instructions for a specific processor to use
14.
Explain what is meant by assembly language
a)
Instructions executed by the CPU in binary format.
b)
Instructions in the form of mnenomics e.g. ADD, STORE.
c)
A language using commands that humans can understand e.g. Java
15.
Explain what is meant by a high-level programming language.
a)
A language written using language that humans can understand e.g. Java
b)
The use of mnemonics like ADD and STORE which are easy to understand.
c)
Instructions executed by the CPU in binary format.
16.
What is the name given to the range of instructions that can be executed?
a)
Opcode
b)
Number bits
c)
Operand
d)
The instruction set
17.
Is there a common or unique set of instructions for each processor or family or processors?
a)
Common
b)
Unique
18.
Why are mnemonics used by programmers?
a)
Easy to understand
b)
Hard to use
19.
What are the 3 parts of a bit pattern?
a)
Opcode, number bit, operand
b)
CPU, ALU and Control Unit
20.
Which part of a bit pattern comes first - Operand, Opcode or Number bit?
a)
Operand
b)
Opcode
c)
Number bit
21.
What is the Opcode?
a)
Group of bits in machine code(binary) that represent the operation or instruction
b)
Tells the computer if information is a value
or address
c)
Data to be used in operation OR
address where
data can be found.
22.
What is the number bit?
a)
Tells the computer if information
in operand is a value
or address
b)
Group of bits in machine
code(binary) that represent the
operation or instruction.
23.
What is the Operand?
a)
Data to be used in operation OR
address where
data can be found.
b)
Group of bits in machine
code(binary) that represent the
operation or instruction.
c)
Tells the computer if information
in operand is a value
or address
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