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Computers represent data in binary form - OCR - GCSE Computer Science - Question 1 - 2023 - Paper 1
Question 1
Computers represent data in binary form. (a) Tick (✓) one box to identify the statement about binary that is true. - Binary digits can only be the values 0, 1 and ... show full transcript
Worked Solution & Example Answer:Computers represent data in binary form - OCR - GCSE Computer Science - Question 1 - 2023 - Paper 1
Step 1
Tick (✓) one box to identify the statement about binary that is true.
Answer
The correct statement is: 'Binary is used because computers are made of switches that can only be on or off.' This statement reflects the fundamental nature of binary, which consists of only two values, 0 and 1, representing the off and on states of switches.
Step 2
Complete the table by writing the missing denary, 8-bit binary or hexadecimal values.
Answer
- For the denary value 49, the 8-bit binary equivalent is 00110001, which can be derived by converting 49 to binary.
- The hexadecimal equivalent of 01100110 (binary) is 66. This can be calculated by grouping the binary into nibbles and converting each nibble.
- The denary value 244 corresponds to the 8-bit binary value 11110100. This is the binary representation of 244.
Step 3
Step 4
Identify the binary shift that has been applied to the 8-bit binary number 10111000 to get the result 10000000.
Answer
The binary shift applied is a left shift. This can be proven as the leftmost bit (1) moves one place to the left, filling the rightmost position with a 0, thus transforming 10111000 into 10000000.