WorksheetsAssessment Grade 11
Total questions: 113
Worksheet time: 1hrs 25mins
Name
Class
Date
1.
What is the base of the binary system?
a)
2
b)
8
c)
10
d)
16
2.
Which number system uses digits 0–9 only?
a)
Binary
b)
Octal
c)
Denary
d)
Hexadecimal
3.
How many symbols are used in hexadecimal?
a)
8
b)
10
c)
12
d)
16
4.
What is the hexadecimal equivalent of decimal 15?
a)
F
b)
E
c)
D
d)
C
5.
What is ASCII primarily used for?
a)
Storing images
b)
Representing text
c)
Storing videos
d)
Representing sound
6.
How many bits are in standard ASCII?
a)
7
b)
8
c)
16
d)
32
7.
Which encoding supports characters from most languages?
a)
ASCII
b)
Denary
c)
Hexadecimal
d)
Unicode
8.
Which of these is NOT a valid binary number?
a)
1010
b)
1111
c)
2021
d)
1
9.
Convert binary 1010 to decimal.
a)
8
b)
9
c)
10
d)
11
10.
In one’s complement, how is a negative number formed?
a)
Flip all bits
b)
Add 1
c)
Subtract 1
d)
Shift left
11.
What is the two’s complement of binary 0101?
a)
1010
b)
1011
c)
1101
d)
1110
12.
Which advantage does two’s complement have over one’s complement?
a)
Two zeros
b)
Single zero
c)
Simpler decimal conversion
d)
Base 8 support
13.
What is the decimal value of 11111111 in 8-bit two’s complement?
a)
-1
b)
0
c)
127
d)
255
14.
How is -5 represented in 8-bit two’s complement?
a)
11111011
b)
11111010
c)
101
d)
11111101
15.
Which operation does two’s complement simplify?
a)
Multiplication
b)
Addition and subtraction
c)
Division
d)
Bit shifting
16.
What is the one’s complement of 00001111?
a)
11110000
b)
1110
c)
11111111
d)
00000000
17.
In 8-bit two’s complement, what is the range of integers?
a)
0 to 255
b)
-255 to 255
c)
-128 to 127
d)
-127 to 128
18.
How is an image stored in a computer?
a)
Pixels
b)
Frames
c)
Waves
d)
Packets
19.
What does pixel stand for?
a)
Picture element
b)
Point element
c)
Piece of light
d)
Partial element
20.
What is resolution measured in?
a)
Pixels per inch
b)
Frames per second
c)
Bits per sample
d)
Megabytes
21.
Which factor affects image file size?
a)
Colour depth
b)
Frame rate
c)
Frequency
d)
Sampling rate
22.
How is sound stored digitally?
a)
Pixels
b)
Sampling
c)
Frames
d)
Packets
23.
What is the sampling rate?
a)
Samples per second
b)
Frames per second
c)
Pixels per inch
d)
Bytes per file
24.
Which unit is used for sampling rate?
a)
Hz
b)
dB
c)
MB
d)
cm
25.
What increases sound quality?
a)
Higher sampling rate
b)
Lower bit depth
c)
Less channels
d)
More compression
26.
What is packet switching?
a)
Dividing data into packets
b)
Sending in one stream
c)
Encrypting data
d)
Error detection
27.
What does each packet contain?
a)
Only data
b)
Data and header
c)
Only header
d)
Encryption key
28.
Why is packet switching efficient?
a)
Uses one fixed route
b)
Uses multiple routes
c)
Encrypts data
d)
Sends without delay
29.
Which method checks packet errors?
a)
Parity check
b)
Header info
c)
Compression
d)
Packet routing
30.
What happens if a packet is lost?
a)
Ignored
b)
Request resend
c)
End transmission
d)
Skip data
31.
What is latency?
a)
Delay in transmission
b)
Packet loss
c)
Data encryption
d)
File compression
32.
What is bandwidth measured in?
a)
Hz
b)
Bytes
c)
Bits per second
d)
Packets
33.
Which device directs packets?
a)
Router
b)
Monitor
c)
Printer
d)
CPU
34.
What ensures packets arrive in order?
a)
Header information
b)
Encryption
c)
Compression
d)
Protocol
35.
Which base is hexadecimal?
a)
2
b)
8
c)
10
d)
16
36.
Convert decimal 255 to hexadecimal.
a)
FF
b)
AA
c)
11
d)
F0
37.
Convert hex A to decimal.
a)
9
b)
10
c)
11
d)
12
38.
Which of these is NOT hexadecimal?
a)
1F
b)
2A
c)
G5
d)
9C
39.
How many bits are in Unicode (UTF-16)?
a)
8
b)
16
c)
32
d)
64
40.
Which character set can represent emojis?
a)
ASCII
b)
Unicode
c)
Hexadecimal
d)
Binary
41.
What is the ASCII code for capital 'A'?
a)
65
b)
66
c)
97
d)
64
42.
What is the ASCII code for lowercase 'a'?
a)
65
b)
66
c)
97
d)
98
43.
In 8-bit one’s complement, what is the range of integers?
a)
0 to 255
b)
-127 to 127
c)
-128 to 127
d)
-255 to 255
44.
What is the two’s complement of binary 1111?
a)
0000
b)
1
c)
1110
d)
1001
45.
Why is two’s complement widely used?
a)
Easier subtraction
b)
More digits
c)
Supports hex
d)
Faster multiplication
46.
How many representations of zero exist in one’s complement?
a)
0
b)
1
c)
2
d)
None
47.
How many representations of zero exist in two’s complement?
a)
1
b)
2
c)
0
d)
Infinite
48.
What is -128 in 8-bit two’s complement?
a)
10000000
b)
1111111
c)
11111111
d)
1
49.
Which unit is used for colour depth?
a)
Bits per pixel
b)
Bytes per pixel
c)
Pixels per inch
d)
Frames per second
50.
Increasing colour depth increases…?
a)
File size
b)
Frame rate
c)
Frequency
d)
Compression
51.
Which affects video quality?
a)
Resolution
b)
Frame rate
c)
Colour depth
d)
All of these
52.
What is lossy compression?
a)
Removes data permanently
b)
Compresses without loss
c)
Increases quality
d)
Slows transmission
53.
What is lossless compression?
a)
No data lost
b)
Some data lost
c)
Increases size
d)
Removes noise
54.
Which file type is lossy?
a)
JPEG
b)
PNG
c)
BMP
d)
TIFF
55.
Which file type is lossless?
a)
MP3
b)
JPEG
c)
PNG
d)
MPEG
56.
Which factor affects sound quality?
a)
Bit depth
b)
Frame rate
c)
Resolution
d)
File type
57.
What is bit depth in sound?
a)
Number of bits per sample
b)
Number of samples per second
c)
Number of frames per second
d)
File size
58.
Which protocol ensures reliable transmission?
a)
IP
b)
HTTP
c)
TCP
d)
FTP
59.
Which layer breaks data into packets?
a)
Application
b)
Network
c)
Transport
d)
Physical
60.
Which protocol routes packets?
a)
TCP
b)
IP
c)
HTTP
d)
FTP
61.
What is packet header used for?
a)
Encryption
b)
Addressing
c)
Compression
d)
Sampling
62.
Which term refers to data rate of a channel?
a)
Bandwidth
b)
Latency
c)
Throughput
d)
Resolution
63.
Which method reduces file size?
a)
Compression
b)
Packet switching
c)
Error checking
d)
Sampling
64.
Which type of compression is used for text files?
a)
Lossless
b)
Lossy
c)
Both
d)
None
65.
Which unit measures transmission speed?
a)
Mbps
b)
Hz
c)
dB
d)
Pixels
66.
Which device connects different networks?
a)
Switch
b)
Router
c)
Hub
d)
Repeater
67.
What is the base of the binary system?
a)
2
b)
8
c)
10
d)
16
68.
Which number system uses digits 0–9 only?
a)
Binary
b)
Octal
c)
Denary
d)
Hexadecimal
69.
How many symbols are used in hexadecimal?
a)
8
b)
10
c)
12
d)
16
70.
What is the hexadecimal equivalent of decimal 15?
a)
F
b)
E
c)
D
d)
C
71.
What is ASCII primarily used for?
a)
Storing images
b)
Representing text
c)
Storing videos
d)
Representing sound
72.
How many bits are in standard ASCII?
a)
7
b)
8
c)
16
d)
32
73.
Which encoding supports characters from most languages?
a)
ASCII
b)
Denary
c)
Hexadecimal
d)
Unicode
74.
How many bits does UTF-8 use at minimum?
a)
4
b)
2
c)
1
d)
8
75.
Which of these is NOT a valid binary number?
a)
1010
b)
1111
c)
2021
d)
1
76.
Convert binary 1010 to decimal.
a)
8
b)
9
c)
10
d)
11
77.
Which transmission sends one bit at a time over a single channel?
a)
Serial
b)
Parallel
c)
Half-duplex
d)
Full-duplex
78.
Which transmission sends multiple bits simultaneously?
a)
Serial
b)
Parallel
c)
Half-duplex
d)
Full-duplex
79.
Which transmission type is more reliable over long distances?
a)
Serial
b)
Parallel
c)
Both same
d)
None
80.
Which transmission type is faster for short distances?
a)
Serial
b)
Parallel
c)
Full duplex
d)
Half duplex
81.
USB uses which type of transmission?
a)
Serial
b)
Parallel
c)
Half-duplex
d)
Full-duplex
82.
Which transmission allows data in both directions but not at the same time?
a)
Simplex
b)
Half-duplex
c)
Full-duplex
d)
Parallel
83.
Which transmission allows simultaneous two-way communication?
a)
Simplex
b)
Half-duplex
c)
Full-duplex
d)
Serial
84.
Walkie-talkies are an example of…
a)
Simplex
b)
Half-duplex
c)
Full-duplex
d)
Parallel
85.
A telephone call is an example of…
a)
Simplex
b)
Half-duplex
c)
Full-duplex
d)
Serial
86.
A TV broadcast is an example of…
a)
Simplex
b)
Half-duplex
c)
Full-duplex
d)
Parallel
87.
Which error detection method adds up byte values and sends the total?
a)
Checksum
b)
Parity check
c)
Echo check
d)
ARQ
88.
Which error detection method adds an extra bit to make number of 1s even or odd?
a)
Checksum
b)
Parity check
c)
Echo check
d)
ARQ
89.
Which method involves sending data back to the sender for verification?
a)
Checksum
b)
Parity check
c)
Echo check
d)
ARQ
90.
Which method requests retransmission if errors are detected?
a)
Checksum
b)
Parity check
c)
Echo check
d)
ARQ
91.
In even parity, what is the parity bit for 1011?
a)
0
b)
1
c)
Even
d)
Odd
92.
In odd parity, what is the parity bit for 1100?
a)
0
b)
1
c)
2
d)
None
93.
Which method is most reliable among parity, checksum, echo, and ARQ?
a)
Parity
b)
Checksum
c)
Echo
d)
ARQ
94.
How many bytes are in 1 kilobyte (KB)?
a)
1000
b)
1024
c)
100
d)
512
95.
How many bits are in 1 byte?
a)
2
b)
4
c)
8
d)
16
96.
How many bytes are in 1 megabyte (MB)?
a)
1000000
b)
1024000
c)
1048576
d)
1024
97.
How many megabytes are in 1 gigabyte (GB)?
a)
1000
b)
1024
c)
2048
d)
512
98.
An image has resolution 200 × 100 pixels with 8-bit colour. File size (no compression)?
a)
2000 bytes
b)
20000 bytes
c)
160000 bits
d)
Both B and C
99.
A sound file has sample rate 1000 Hz, duration 10s, bit depth 8 bits. File size?
a)
80000 bits
b)
10000 bytes
c)
100000 bits
d)
Both A and B
100.
A video has 10 frames/sec, each frame = 1000 bytes, duration 5s. File size?
a)
10000 bytes
b)
50000 bytes
c)
1000 bytes
d)
15000 bytes
101.
An image has 1024×768 pixels, 24-bit colour. File size?
a)
1.8 MB
b)
2.25 MB
c)
2.36 MB
d)
2.5 MB
102.
A text file has 1000 characters in ASCII. File size?
a)
1000 bits
b)
1000 bytes
c)
7000 bits
d)
8000 bits
103.
A Unicode file with 500 characters (UTF-16). File size?
a)
500 bytes
b)
1000 bytes
c)
8000 bits
d)
2000 bytes
104.
If parity is even, what is the parity bit for 1001101?
a)
0
b)
1
c)
Even
d)
Odd
105.
If parity is odd, what is the parity bit for 1110001?
a)
0
b)
1
c)
Even
d)
Odd
106.
A 4-byte message has values 10, 20, 30, 40. Checksum?
a)
100
b)
255
c)
0
d)
None
107.
If checksum received is different from calculated?
a)
Error detected
b)
No error
c)
Data correct
d)
Ignore
108.
ARQ requires which feature?
a)
Acknowledgment
b)
Checksum only
c)
Parity only
d)
Echo
109.
Which error detection method is simplest?
a)
Checksum
b)
Parity
c)
ARQ
d)
Echo
110.
If data 1010 sent, echo received 1011, what happened?
a)
Error detected
b)
No error
c)
Checksum failed
d)
ARQ needed
111.
Which factor affects transmission speed?
a)
Bandwidth
b)
Duplex mode
c)
Transmission type
d)
All of these
112.
Which is more expensive: serial or parallel?
a)
Serial
b)
Parallel
c)
Both equal
d)
None
113.
Which transmission is used in computer buses (internal)?
a)
Serial
b)
Parallel
c)
Half-duplex
d)
Full-duplex
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