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Computers carry out mathematical operations - Edexcel - GCSE Computer Science - Question 5 - 2019 - Paper 1
Question 5
Computers carry out mathematical operations. (a) Give the result of applying a logical shift left by 2 to the 8-bit binary pattern 00110110. (b) Describe the funct... show full transcript
Worked Solution & Example Answer:Computers carry out mathematical operations - Edexcel - GCSE Computer Science - Question 5 - 2019 - Paper 1
Step 1
Give the result of applying a logical shift left by 2 to the 8-bit binary pattern 00110110.
Answer
To perform a logical shift left by 2 on the binary number 00110110, we remove the leftmost bits and fill in 0s from the right.
- Original binary number:
00110110 - After shifting left by 2 positions:
11000000
Thus, the result of the logical shift left is 11000000.
Step 2
Describe the function of the component labelled A.
Answer
The component labelled A in the diagram represents a data bus or cache memory function. Its primary role is to facilitate the transfer of data between the Central Processing Unit (CPU) and the Main Memory. This allows the CPU to retrieve or store data efficiently, contributing to the overall speed and performance of the computer system.
Step 3
Convert the binary number 00111101 to hexadecimal.
Answer
To convert the binary number 00111101 to hexadecimal, we can group the bits in sets of four starting from the right:
- Group 1:
0011corresponds to3 - Group 2:
1101corresponds toD
Thus, the binary number 00111101 is equivalent to the hexadecimal number 3D.