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DIGITAL TECH
DIGITAL TECH
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Answers
1
Select the statements that are true about a key field within a database
a key field uniquely identifies a record
A key field usually consists of multiple fields in a table
A key field is usually from one field in each table
2
Which of the following file formats are examples of data portability?
MP3
PDF
Docx
MP4
3
The greater the resolution the greater the file size
False
True
4
How many bits are in a nibble
8
4
12
1
5
Streaming
Allows a video to be viewed on a website without a time delay
part of the memory used to store a downloaded part of the video.
6
What does ADC stand for
Analogue to Digital Conversion
Analogue to Digital Converter
7
Select which database is more appropriate in everyday database management systems
One to many
One to one
8
What data type is 1st of December 2022
Character
Numeric
String
Date/Time
9
The wifi network in your house is most likely a ________ area network
wide
local
short
long
10
The frequency that at which samples are taken at are measured in
gigabyte
mgb
hertz
11
What are the three v's in relation to big data
Variety, Velcro and Velocity
volume, variety and velocity
12
Does a one to many database have to have a primary key
True
False
13
Which of the following statements are true about data encryption
file transfer protocol is a specific protocol for protecting
data encryption uses software to scramble data before it is sent
if the data is accepted without the encryption key the data is useless
only the user with the decryption key can unscramble the data
14
Which of the following statements is UNTRUE about a ring network
All data must pass through the file server
all data travels in one direction visiting each computer
Data can travel in both directions along the backbone
Each computer is directly connected to two other adjacent computers
15
Does a foreign key be present in more than one table in a database?
True
False
16
There are 1025 bits in one kilobyte
False
True
17
What is the role of anti-virus software
ensures that your computer doesnt slow down
Guarantees that if your computer is infected that your files are 100% safe
scans all storage devices connected to a computer like usb memory keys
detect, locate and remove a virus that can infect a computer sytem
18
What are the three core components of the CPU
Anti-Virus Software
IAS
AlU
Control Unit
19
Why might you use a macro in a spreadsheet
reduces the chance of mistakes happening
cheaper
Saves time as the same instruction can be repeated over and over
20
Select which of the following are utility applications
Anti Virus Software
Disc Defragmentation
Task Scheudling
21
Choose the correct steps for the fetch execute cycle
Program Counter, memory address register, MDR, IR and Accumulator
memory address register, MDR, IR Program Counter, and Accumulator
MDR, IR, Program Counter, memory address register, and Accumulator
22
Is a foreign key needed for a database?
Yes
No
23
Disc Defragementation
rearranges the data stored in the hard disc so files are stored in blocks
is a process that only a computer expert can do
is a process that is expensive to do
Speeds up time because all the data is stored in the same area of the disk
24
Application software
enables the computer to do a particular task such as word processing
interface between computer hardware and user application programs
25
Which of the following statements is true about a bus network
to add a new computer its cable is attached to the backbone
They are connected by their own cable to a file server
Data can travel in both directions along the backbone
an additional computer can be added by attaching it to the file server
26
Real time processing is
data that is processed IMMEDIATELY after it is inputted
it is used for concert tickets and airline seats
data is inputted at an off peak time
27
Sample rate is
The number of audio samples captured (ps) to represent the sounds digitally
the quantity of data measured in bits that is processed in a given time
28
Which of these are data types in digital data?
Yes/No
date/time
Numeric
29
what symbol does a cell have to have for to be an absolute cell reference?
$
£
"
30
Which of the following statements are true about bitmap graphics
they store details about every individual element of the image
the image can also be compressed, reducing its size
they store information about the components that make up the image
Based on mathematical objects like lines curves and shapes
