Cambridge AS Level Computer Science
Theory Questions And Answers 100%
Verified.
176 - correct answer.Convert Denary 374 to Hexadecimal.
2DF - correct answer.Convert Denary 735 to Hexadecimal.
110110110111 - correct answer.Convert Hexadecimal DB7 to Binary.
64001 - correct answer.Convert Hexadecimal FA01 to Decimal.
The binary number obtained by subtracting each digit in a binary number from 1. -
correct answer.Define one's compliment.
The one's compliment of a binary number plus 1. (for negatives only) - correct
answer.Define two's compliment.
1111 - correct answer.Show Decimal -7 as a 4 bit sign and magnitude binary.
0110 - correct answer.Show Decimal 6 as a 4 bit sign and magnitude binary.
0101 - correct answer.Convert Decimal 5 to 4 bit One's Compliment Binary
1001 - correct answer.Convert Decimal -6 to 4 bit One's Compliment Binary
0111 - correct answer.Convert Decimal 7 to 4 bit Two's Compliment
1001 - correct answer.Convert Decimal -7 to 4 bit Two's Compliment
-8 - correct answer.In 4 Bit two's compliment what is the value of the most significant
bit?
-8 - correct answer.What is the Two's Compliment of the Binary 1000?
A nibble - correct answer.What is the term for 4 bits?
Binary Coded Decimal - correct answer.What does BCD stand for?
One BCD digit per byte. Two BCD Digits per byte - correct answer.What are two
options for storing BCD?
, 13, 7, 14 - correct answer.Convert 110101111110 BCD (Two BCD Digits per Byte) to
Decimal
A graphic consisting of components defined by geometric formulae and associated
properties, such as line colour and style. - correct answer.Define a vector graphic.
A pixel (picture element) is the smallest identifiable component of a bitmap image,
defined by just two properties: its position and its colour. - correct answer.Define Pixel.
The number of bits per pixel - correct answer.Define the colour depth.
Vector images are smaller than corresponding bitmap images. - correct
answer.Compare a Bitmap image to a Vector image.
A prefix representing the factor 2¹⁰ (1024) written as the symbol Ki - correct
answer.Define Kibi. (Kibibyte)
A prefix representing the factor 2²⁰ (1048576) written as the symbol Mi - correct
answer.Define Mebi. (Mebibyte)
A prefix representing the factor 2³⁰ written as the symbol Gi - correct answer.Define
Gibi. (Gibibyte)
about 3 MiB - correct answer.If the resolution of an image is 1366 by 768 and the
colour depth is 24 bits, what is the file size in mebi bytes?
band-limiting filter and an analogue-to-digital converter (ADC) - correct answer.What
are the two components of a sound encoder?
A band-limiting filter removes high-frequency components as the human ear cannot
detect these and they would cause problems for coding. - correct answer.Define a
band-limiting filter.
Sampling rate and sampling resolution - correct answer.When coding for sound, what
two factors make an impact on the file size?
The number of samples (of sound) taken per second - correct answer.Define sampling
rate.
the accuracy of the amplitude (loudness) of the digitised sound wave - correct
answer.Define sampling resolution.
Sampling must be done at a frequency at least twice the highest frequency in the given
sample. - correct answer.State Nyquist's theorem.
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