Types of Programming Language (OCR A Level Computer Science): Exam Questions

A charity uses a desktop computer to record financial donations that it receives. The computer contains a single core, 2.4GHz processor with 2MB cache.

Fig. 1 shows assembly code written using the Little Man Computer (LMC). The program calculates and outputs the total amount that is donated to the charity in any particular day. Depending on the amount, an additional bonus may be added to each amount donated.

Write LMC code that will reset the value of the memory location labelled total to zero and then stop the program.

In assembly language, different modes of addressing memory can be used.

Discuss the different modes used. You should include:

• How the operand value is determined

• What an operand of 27 would refer to in that mode

• The reasons for requiring multiple modes of addressing

The table below shows the Little Man Computer instruction set.

Complete the table above to show the missing mnemonics and instructions

A team of programmers create a robot that will be used in a factory. The robot will be able to do the work of multiple humans.

The programmers discuss whether to write the instructions for the robot in assembly language or a high-level language.

Describe two differences between assembly language and high-level languages.

A text-based computer game allows a user to dig for treasure on an island. The island is designed as a grid with 10 rows and 20 columns to store the treasure. Each square is given an x and y coordinate. Some of the squares in the grid store the name of a treasure object. Each treasure object has a value, e.g. 100 and a level, e.g. "Bronze."

Describe two benefits of using an object-oriented paradigm rather than a procedural paradigm.

Fig. 1 shows assembly code written using the Little Man Computer (LMC). The program calculates and outputs the total amount that is donated to the charity in any particular day. Depending on the amount, an additional bonus may be added to each amount donated.

Fig. 1

The program shown in Fig. 1 is run once using three different inputs. Therefore, while the program is running once, it will output the updated total three times.

Give the total values that are output when the values 10, 50 and 120 are input into this program.

The table below shows the Little Man Computer instruction set.

Write a program using the Little Man Computer instruction set that will allow a user to input two numbers and then output the larger of the two numbers. The program should loop continuously.

Procedural programming and object-oriented programming are two paradigms commonly used by programmers when developing computer games.

Discuss the advantages of using object-oriented programming over procedural programming when developing computer games.

You should refer to inheritance, encapsulation and polymorphism in your answer.

A program written using the Little Man Computer instruction set is shown in Fig. 1.

Complete the table below to show the output(s) from this program given the inputs.