CUSTOMER_CODE
SMUDE
DIVISION_CODE
SMUDE
EVENT_CODE
OCTOBER15
ASSESSMENT_CODE BC0051_OCTOBER15
QUESTION_TYPE
DESCRIPTIVE_QUESTION
QUESTION_ID
3450
QUESTION_TEXT
Write a short on
a. Lexical analysis
b. Syntax analysis.
SCHEME OF EVALUATION
a.Lexical analysis(5 marks)
b.Syntax analysis(5 marks)
QUESTION_TYPE
DESCRIPTIVE_QUESTION
QUESTION_ID
72897
QUESTION_TEXT
Discuss the purpose of following intelx86 registers.
a. AX
b. DX
c. CX
d. DI
e.
a.
b.
SCHEME OF EVALUATION c.
d.
e.
SI
AX: 2 mark
DX: 2 mark
CX: 2 mark
DI: 2 mark
SI: 2 mark
QUESTION_TYPE
DESCRIPTIVE_QUESTION
QUESTION_ID
72898
QUESTION_TEXT
Discuss Linking versus Loading.
a. Program Loading: 3 marks
b. Relocation: 3 marks
SCHEME OF EVALUATION
c. Symbol resolution: 3 marks
Concluding note: 1 mark
QUESTION_TYPE
DESCRIPTIVE_QUESTION
QUESTION_ID
114583
Explain the following LPDT:
QUESTION_TEXT
a.
LEX
b.
YACC
a.
LEX: LEX is a tool for automatically generating lexical analyzers.
A LEX source program is a specifications of a lexical analyzer,
consisting of a set of regular expressions together with an action for each
regular expression .The action is a piece of code which is to be executed
whenever a token specified by the corresponding regular expression is
recognized. Typically, an action will pass an indication of the token
found to the parser, perhaps with side effects such as making an entry in
the symbol table. The output of LEX is a lexical analyzer program
constructed from the LEX source specification.
(5 marks)
SCHEME OF
EVALUATION
b.
YACC: The main component of the input to YACC is a syntax
directed definition for the translation of the source program into an IR or
the target program. YACC allows the user to specify a possibly
ambiguous grammar along with precedence and associatively
information about operators and how YACC resolves any parsing action
conflicts that arise. The user provides YACC with a grammar, and
YACC builds the LALR states. YACC then attempts to select the
parsing actions for each state.
(5 marks)
QUESTION_TYPE
DESCRIPTIVE_QUESTION
QUESTION_ID
114585
QUESTION_TEXT
What is MASM? Explain its features.
The Microsoft Macro Assembler (MASM) is an assembler for the x86
family of microprocessors, originally produces Microsoft MS-DOS
operating system. (1-mark)
SCHEME OF
EVALUATION
1.
It supported a wide variety of macro facilities and structured
programming idioms, including high level constructions for looping.
(1.5 marks)
2.
MASM is one of the few Microsoft development tools for which
there was no separate 16 bit and 32 bit version. (1.5 marks)
3.
It affords the programmer looking for additional performance a
three pronged approach to performance based solutions. (1.5 marks)
4.
MASM can build very small high performance executable files
that are well suited where size and speed matter. (1.5 marks)
5.
When additional performance is required for other languages,
MASM can enhance the performance of these languages with small fast
and powerful dynamic link libraries. (1.5 mark)
6.
For programmers who work in Microsoft visual C/C++, MASM
builds modules and libraries that are in the same format (1.5 marks)
QUESTION_TYPE
DESCRIPTIVE_QUESTION
QUESTION_ID
114587
QUESTION_TEXT
Write a note on relocation and bootstrapping.
SCHEME OF
EVALUATION
Relocation: Relocation occurs both when a linker combines object files
and when a loader copies an executable file into memory in preparation
for execution………. (7 marks)
Boot strapping: In computing, bootstrapping refers to a process where
simple system activates another more complicated system that serves
the same purpose……… (3 marks)