The three examples of code shown in Figure 4 are all equivalent to one another.
Figure 4
Example 1 | Example 2 | Example 3 |
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Identify one choice to show the statement that is true about Figure 4
None of the examples of code is in a low-level language.
Only one of the examples of code is in a low-level language
Only two of the examples of code are in low-level languages
All three of the examples of code are in low-level languages
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Figure 4 shows three programs (A, B, C) that add two numbers and output the result. The programs are written in different programming languages.
Figure 4
A | B | C |
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Identify the type of programming language used for each program shown in Figure 4 by writing A, B or C in the correct row of Table 2.
You must only use each letter once.
Table 2
A, B or C | |
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Assembly language | |
High-level language | |
Machine code |
Identify one choice to show which statement is true about program translators.
A compiler translates all the original program code before execution
Compiled code still needs the original program code to execute
Compiled code executes more slowly than code that is being interpreted.
Interpreters generate machine code directly.
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Programming languages can be classified as low-level or high-level.
Identify two choices to show the statements that are true about code written using a low-level language instead of a high-level language.
The code more closely resembles English.
The code is easier to write
The code is not translated using a compiler.
The code is quicker to write
The code can directly manipulate computer registers.
The code never needs to be translated before being executed.
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Assemblers and interpreters are two types of program translator.
State the purpose of an assembler.
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The following are three types of program translator:
A Assembler
B Compiler
C Interpreter
Write the label (A–C) for the type of translator next to the description
Description | Label (A–C) |
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Converts a low-level language designed to be human-readable into machine code | |
Reads a high-level program line-by-line and calls corresponding subroutines. | |
Takes the entire high-level program as input and produces machine code. |
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Explain why a developer, who is good at both low-level and high-level programming, would normally use high-level languages when writing programs.
The three examples of code shown in Figure 4 are all equivalent to one another.
Figure 4
Example 1 | Example 2 | Example 3 |
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Statements A and B refer to two different types of program translator.
Statement A: This type of translator can convert a high-level language program into machine code. The source code is analysed fully during the translation process. The result of this translation can be saved, meaning the translation process does not need to be repeated.
Statement B: This type of translator was used to convert the code in Example 2 to the code in Example 3 in Figure 4.
State the type of program translators referred to in statements A and B.
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State one advantage of writing programs in assembly language instead of a high-level language.
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State two advantages of programming using a high-level language compared with programming using a low-level language.
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Explain how an interpreter works.
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