IB Computer Science HL standards

Introduction

These are the standards for IB computer science, Higher Level (HL). Pay attention to the command term at the start of each standard. It describes at what level you must understand the standard. Please reference levels of knowing for a deeper discussion of this important idea.

IB standards are the intellectual property of the International Baccalaureate Organization.

Assessment Statement	Big Idea
System fundamentals
Identify the context for which a new system is planned.	System fundamentals
Describe the need for change management.	System fundamentals
Outline compatibility issues resulting from situations including legacy systems or business mergers.	System fundamentals
Compare the implementation of systems using a client’s hardware with hosting systems remotely.	System fundamentals
Evaluate alternative installation processes.	System fundamentals
Discuss problems that may arise as a part of data migration.	System fundamentals
Suggest various types of testing.	System fundamentals
Describe the importance of user documentation.	System fundamentals
Evaluate different methods of providing user documentation.	System fundamentals
Evaluate different methods of delivering user training.	System fundamentals
Identify a range of causes of data loss.	System fundamentals
Outline the consequences of data loss in a specified situation.	System fundamentals
Describe a range of methods that can be used to prevent data loss.	System fundamentals
Describe strategies for managing releases and updates.	System fundamentals
Define the terms: hardware, software, peripheral, network, human resources.	System fundamentals
Describe the roles that a computer can take in a networked world.	System fundamentals
Discuss the social and ethical issues associated with a networked world.	System fundamentals
Identify the relevant stakeholders when planning a new system.	System fundamentals
Describe methods of obtaining requirements from stakeholders.	System fundamentals
Describe appropriate techniques for gathering the information needed to arrive at a workable solution.	System fundamentals
Construct suitable representations to illustrate system requirements.	System fundamentals
Describe the purpose of prototypes to demonstrate the proposed system to the client.	System fundamentals
Discuss the importance of iteration during the design process.	System fundamentals
Explain the possible consequences of failing to involve the end-user in the design process.	System fundamentals
Discuss the social and ethical issues associated with the introduction of new IT systems.	System fundamentals
Define the term usability.	System fundamentals
Identify a range of usability problems with commonly used digital devices.	System fundamentals
Identify methods that can be used to improve the accessibility of systems.	System fundamentals
Identify a range of usability problems that can occur in a system.	System fundamentals
Discuss the moral, ethical, social, economic and environmental implications of the interaction between humans and machines.	System fundamentals
Computer Organization
Outline the architecture and function of the CPU, ALU, CU and the registers within the CPU	Computer organization
Explain the use of cache memory.	Computer organization
Explain the machine instruction cycle.	Computer organization
Identify the need for persistent storage.	Computer organization
Describe the main functions of an operating system.	Computer organization
Outline the use of a range of application software.	Computer organization
Identify common features of applications.	Computer organization
Define the terms: bit, byte, binary, denary/decimal, hexadecimal.	Computer organization
Outline the way in which data is represented in the computer.	Computer organization
Define the Boolean operators: AND, OR, NOT, NAND, NOR and XOR.	Computer organization
Construct truth tables using the above operators.	Computer organization
Construct a logic diagram using AND, OR, NOT, NAND, NOR and XOR gates.	Computer organization
Networks
Identify different types of networks.	Networks
Outline the importance of standards in the construction of networks.	Networks
Describe how communication over networks is broken down into different layers.	Networks
Identify the technologies required to provide a VPN.	Networks
Evaluate the use of a VPN.	Networks
Define the terms: protocol, data packet.	Networks
Explain why protocols are necessary.	Networks
Explain why the speed of data transmission across a network can vary.	Networks
Explain why compression of data is often necessary when transmitting across a network.	Networks
Outline the characteristics of different transmission media.	Networks
Explain how data is transmitted by packet switching.	Networks
Outline the advantages and disadvantages of wireless networks.	Networks
Describe the hardware and software components of a wireless network.	Networks
Describe the characteristics of wireless networks.	Networks
Describe the different methods of network security.	Networks
Evaluate the advantages and disadvantages of each method of network security.	Networks
Computational thinking, problem-solving and programming
Identify the procedure appropriate to solving a problem.	Computational Thinking
Evaluate whether the order in which activities are undertaken will result in the required outcome.	Computational Thinking
Explain the role of sub-procedures in solving a problem.	Computational Thinking
Identify when decision-making is required in a specified situation.	Computational Thinking
Identify the decisions required for the solution to a specified problem.	Computational Thinking
Identify the condition associated with a given decision in a specified problem.	Computational Thinking
Explain the relationship between the decisions and conditions of a system.	Computational Thinking
Deduce logical rules for real-world situations.	Computational Thinking
Identify the inputs and outputs required in a solution.	Computational Thinking
Identify pre-planning in a suggested problem and solution.	Computational Thinking
Explain the need for pre-conditions when executing an algorithm.	Computational Thinking
Outline the pre- and post-conditions to a specified problem.	Computational Thinking
Identify exceptions that need to be considered in a specified problem solution.	Computational Thinking
Identify the parts of a solution that could be implemented concurrently.	Computational Thinking
Describe how concurrent processing can be used to solve a problem.	Computational Thinking
Evaluate the decision to use concurrent processing in solving a problem.	Computational Thinking
Identify examples of abstraction.	Computational Thinking
Explain why abstraction is required in the derivation of computational solutions for a specified situation.	Computational Thinking
Construct an abstraction from a specified situation.	Computational Thinking
Distinguish between a real-world entity and its abstraction.	Computational Thinking
Describe the characteristics of standard algorithms on linear arrays.	Computational Thinking
Outline the standard operations of collections.	Computational Thinking
Discuss an algorithm to solve a specific problem.	Computational Thinking
Analyse an algorithm presented as a flow chart.	Computational Thinking
Analyse an algorithm presented as pseudocode.	Computational Thinking
Construct pseudocode to represent an algorithm.	Computational Thinking
Suggest suitable algorithms to solve a specific problem.	Computational Thinking
Deduce the efficiency of an algorithm in the context of its use.	Computational Thinking
Determine the number of times a step in an algorithm will be performed for given input data.	Computational Thinking
State the fundamental operations of a computer.	Computational Thinking
Distinguish between fundamental and compound operations of a computer.	Computational Thinking
Explain the essential features of a computer language.	Computational Thinking
Explain the need for higher level languages.	Computational Thinking
Outline the need for a translation process from a higher level language to machine executable code.	Computational Thinking
Define the terms: variable, constant, operator, object.	Computational Thinking
Define common operators.	Computational Thinking
Analyse the use of variables, constants and operators in algorithms.	Computational Thinking
Construct algorithms using loops, branching.	Computational Thinking
Describe the characteristics and applications of a collection.	Computational Thinking
Construct algorithms using the access methods of a collection.	Computational Thinking
Discuss the need for sub-programmes and collections within programmed solutions.	Computational Thinking
Construct algorithms using pre- defined sub-programmes, one- dimensional arrays and/or collections.	Computational Thinking
Abstract Data Structures
Identify a situation that requires the use of recursive thinking.	Abstract data structures
Identify recursive thinking in a specified problem solution.	Abstract data structures
Trace a recursive algorithm to express a solution to a problem.	Abstract data structures
Describe the characteristics of a two- dimensional array.	Abstract data structures
Construct algorithms using two- dimensional arrays.	Abstract data structures
Describe the characteristics and applications of a stack.	Abstract data structures
Construct algorithms using the access methods of a stack.	Abstract data structures
Describe the characteristics and applications of a queue.	Abstract data structures
Construct algorithms using the access methods of a queue.	Abstract data structures
Explain the use of arrays as static stacks and queues.	Abstract data structures
Describe the features and characteristics of a dynamic data structure.	Abstract data structures
Describe how linked lists operate logically.	Abstract data structures
Sketch linked lists (single, double and circular).	Abstract data structures
Describe how trees operate logically (both binary and non-binary).	Abstract data structures
Define the terms: parent, left-child, right-child, subtree, root and leaf.	Abstract data structures
State the result of inorder, postorder and preorder tree traversal.	Abstract data structures
Sketch binary trees.	Abstract data structures
Define the term dynamic data structure.	Abstract data structures
Compare the use of static and dynamic data structures.	Abstract data structures
Suggest a suitable structure for a given situation.	Abstract data structures
Resource Management
Identify the resources that need to be managed within a computer system.	Resource management
Evaluate the resources available in a variety of computer systems.	Resource management
Identify the limitations of a range of resources in a specified computer system.	Resource management
Describe the possible problems resulting from the limitations in the resources in a computer system.	Resource management
Explain the role of the operating system in terms of managing memory, peripherals and hardware interfaces.	Resource management
Outline OS resource management techniques: scheduling, policies, multitasking, virtual memory, paging, interrupt, polling.	Resource management
Discuss the advantages of producing a dedicated operating system for a device.	Resource management
Outline how an operating system hides the complexity of the hardware from users and applications.	Resource management
Control
Discuss a range of control systems.	Control
Outline the uses of microprocessors and sensor input in control systems.	Control
Evaluate different input devices for the collection of data in specified situations.	Control
Explain the relationship between a sensor, the processor and an output transducer.	Control
Describe the role of feedback in a control system.	Control
Discuss the social impacts and ethical considerations associated with the use of embedded systems.	Control
Compare a centrally controlled system with a distributed system.	Control
Outline the role of autonomous agents acting within a larger system.	Control

Provide an answer from a number of possibilities. Recognize and state briefly a distinguishing fact or feature.

The circumstances that form the setting for an event, statement, or idea, and in terms of which it can be fully understood and assessed.

Give a detailed account or picture of a situation, event, pattern or process.

Give a brief account.

A state in which two things are able to exist or occur together without problems or conflict.

Assess the implications and limitations; make judgments about the ideas, works, solutions or methods in relation to selected criteria.

Offer a considered and balanced review that includes a range of arguments, factors or hypotheses. Opinions or conclusions should be presented clearly and supported by appropriate evidence.

Propose a solution, hypothesis or other possible answer.

Give the precise meaning of a word, phrase, concept or physical quantity.

a group or system of interconnected people or things.

Develop information in a diagrammatic or logical form.

Prove or make clear by reasoning or evidence, illustrating with examples or practical application.

Produce a plan, simulation or model.

Give a detailed account including reasons or causes.

a group or system of interconnected people or things.

a group or system of interconnected people or things.

Reach a conclusion from the information given.

anomalous or exceptional conditions requiring special processing – often changing the normal flow of program execution

Make clear the differences between two or more concepts or items.

Break down in order to bring out the essential elements or structure. To identify parts and relationships, and to interpret information to reach conclusions.

Obtain the only possible answer.

A unit of abstract mathematical system subject to the laws of arithmetic.

Give a specific name, value or other brief answer without explanation or calculation.

Give a specific name, value or other brief answer without explanation or calculation.

Follow and record the action of an algorithm.

Represent by means of a diagram or graph (labelled as appropriate). The sketch should give a general idea of the required shape or relationship, and should include relevant features.