ZIMSEC O Level Computer Science Paper 2 Past Papers

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Programming Computer System Structure Computer TerminologyExpert systemsSystems Analysis System SoftwareNetworks and communicationRoboticsDatabasesFlowcharts and trace tables

Explained questions

Which term describes the physical components of a computer system, such as a mouse, keyboard, printer or scanner?
Which term describes the set of programs that controls computer hardware, such as a word processor, spreadsheet or operating system?
Which of the following statements about ROM and RAM is true?
Which of the following is a method of data collection used during systems analysis fact-finding?
During which stage of the systems development life cycle are data flow diagrams produced and requirements analysis carried out?
Give the term for the study carried out to help management decide whether a proposed computer system is worth developing.
Which of the following best describes a peer-to-peer network?
In computer terminology, the physical components of a computer system -- such as the mouse, keyboard, printer and scanner -- are collectively known as the computer's ___.
A group of 8 bits that represents a single character, such as 0101 0110, is known as a...
Data processing in which transactions are collected together and processed periodically in groups, with processing running from start to end with little or no human interaction (e.g. water billing, payroll), is called ___.
A system is tested to ensure workers are paid no less than $1 and no more than $800 per week. Which of the following is an example of extreme test data for this test?
A system is tested to ensure workers are paid no less than $1 and no more than $800 per week. Give an example of abnormal (invalid) test data for this test.
Give the term for the loss of work-related skills that occurs when computer systems are introduced into a workplace, for example through office automation or robotics.
Give the term for a program that self-replicates and spreads into other computers, corrupting files and damaging hardware, such as a boot sector or file type.
Which of the following best describes e-commerce?
The gaining of illegal or unauthorised access into a computer system, often by cracking passwords, is called ______.
The scrambling of computer data into an unreadable form, to prevent it from being read by unauthorised users such as hackers, is called ______.
A value or character appended to the end of a numeric code, used to check the validity of the code after it is copied or entered, is called a
What term refers to the physical, tangible components of a computer system, such as the keyboard, mouse and scanner?
What term refers to the set of programs and instructions that control computer hardware and are used to solve a task?
What is the name of the mode of transmission where data can be sent in both directions, but not at the same time (for example a walkie-talkie or a police radio)?
What is the name for the exchange of signals between devices, such as a printer and a computer, used to establish that they are both ready to send and receive data?
In the standard block diagram of a computer system, name the component of the Central Processing Unit (CPU) that performs arithmetic and logical operations on data.
Which of the following is NOT one of the five basic hardware components of a computer system?

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