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level: High and Low level languages

Questions and Answers List

level questions: High and Low level languages

QuestionAnswer
Give two features of Machine codeBinary commands No translation required
Give two features of Assembly languageCommands are combinations of English characters Before running the program it must be translated to MC
Give Four advantages Low level languageRuns faster takes less space Can use the special features of processor Can work with the internal components of processor(Register)
Give three disadvantages of of low level languageNot portable Harder to debug Instruction harder to remember
Give three advantages of high level languagesEasier to remember Portable Instruction easier to remember
Give 5 disadvantages of high level languagesCannot use special features of processor Translated MC program will run slower than one written in MC Translated MC program will be longer than one written in MC Has to be translated before execution One high level instruction converts to multiple MC instructions
Where are low level languages used ?Used to write programs that will have to access special features of the processor Eg: Device driver
Where are high level languages used ?When writing simple small programs Eg: Calculating payrolls
What is source code ?Programs written by humans
What is object code ?Machine code which is created by a translator
What is a translator?Converts source code into object code
Name two translators which can translate from high level to machine codeInterpreter Compiler
Name a translator which translates from Assembly language to machine codeAssembler
What are the advantages of an interpreter?Translates one line at a time and executes the line. Nothing is saved Easier to debug: If an error is detected it is corrected and translation continues from that point
What are the disadvantages of an interpreter ?Since no executable file of machine code is produced , the interpreted program cannot be used without the interpreter
What are the advantages of a compiler?Translates the entire program into machine code in one session and saves the machine code program on the disk Compiled program runs faster Compiled program can run without compiler or source program Can distribute/sell compiled program without worrying about it being altered
What are the disadvantages of a compiler?Takes time to debug because if an error is detected it must be corrected and recompiled takes a lot of computer resources
Where are compilers and interpreters used and why?Interpreter is used to debug since it can debug more easier and compilers are used to create machine code program for distribution after debugging
What are assemblers?Converts assembly language to machine code Works like a compiler, creates machine code programs
What are syntax errors ?Violating the grammatical rules of a language
What are logic errors ?An error in the reasoning used in the program which makes the computer produce a different result from the one that was expected
What are the methods of error detection ?Detected by testing Running the program with test data and checking if the actual result is the same as expected result Working through the program using a trace table on paper