WJEC Eduqas A Level Computer Science

C2 Section 2: Data Transmission and Representation: revision quiz and key terms

Free practice for C2 Section 2: Data Transmission and Representation in WJEC Eduqas A Level Computer Science. It covers: full topic test for C2 Section 2: Data Transmission and Representation. Try the questions, then check the key terms.

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Question 1 · Multiple choice

What is the denary value of the 8-bit two's complement number 11111110?

Question 2 · True or false?

A standardised character set ensures text displays correctly across systems.

Question 3 · Multiple choice

What is the hexadecimal equivalent of the binary number 10101111?

Question 4 · True or false?

Unicode can represent fewer characters than 7-bit ASCII.

Question 5 · Multiple choice

Which method of data transmission sends several bits at the same time along multiple wires?

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Key terms for C2 Section 2: Data Transmission and Representation

ASCII: Assigns a numeric code to common letters, digits and symbols.
Exponent: The part of a floating point number that states how far the binary point is moved.
Half duplex transmission: Allows data both ways, but only one direction at a time.
Logical shift: Moves every bit left or right, filling new positions with zeros.
Mantissa: The part of a floating point number that holds its significant digits.
Parity bit: An extra bit added to data so the number of 1s is odd or even, allowing simple error detection.
Two's complement: A method of representing signed integers in binary in which the most significant bit has a negative place value.
Unicode: Designed to represent a wider range of characters from many scripts.

What C2 Section 2: Data Transmission and Representation covers

In RADevo this topic has a full topic test and a focused quiz for each part:

C2 Section 2: Bit Patterns and Character Encoding
C2 Section 2: Data Transmission
C2 Section 2: Data Types and Number Representation

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