2020 WAEC (WASSCE) Computer Studies Past Questions & Answers

Question 1

A rectangular image consisting of black lines and white spaces representing data which can be optically read is called?

Accepted Answer

A.  barcode.

Answer

B. decoder.

Answer

C. mnemonics.

Answer

D. pseudocode.

Question 2

A single hexadecimal digit is represented by?

Accepted Answer

C. four bits

Answer

A. one bit.

Answer

B. two bits.

Answer

D.  eight bits.

Question 3

Files that contain machine language instructions are called?

Accepted Answer

B. executable files

Answer

A. interpreter files.

Answer

C. batch files

Answer

D. source files.

Question 4

In Figure 1, the value of Z when X = 1 and Y=0 is?

Accepted Answer

D. 11.

Answer

A.   0.

Answer

B. 1.

Answer

C. 10.

Question 5

Choose the incorrect statement about microcomputers?

Accepted Answer

B. A microcomputer can have more processing capability than a mainframe model.

Answer

A. A microcomputer can be placed on a single silicon chip.

Answer

C. ROM chips may be used in micros to permanently store program instruction.

Answer

D. Most micros use rigid disk storage devices rather than floppy disk drives.

Question 6

An algorithm can be described as?

Accepted Answer

D. a sequence of instructions for solving a problem.

Answer

A. the output of the instruction to computer.

Answer

B. the required to be processed.

Answer

C. problem definition.

Question 7

What will the following BASIC statement produce? PRINT "Afrikom Computer School" A .

Accepted Answer

C. Afrikon Computer School displayed on the screen.

Answer

A. blank on Screen message.

Answer

B. An error indicating on the screen.

Answer

D. Afrikom Computer School printed on paper.

Question 8

If a computer user wants to access the national database from a remote location, the user will require a?

Accepted Answer

D. modem, communication software and telephone

Answer

A. modem, telephone line and decoder.

Answer

B.  teleprinter, telephone line and facsimile.

Answer

C. communication software, telephone line and decoder.

Question 9

The stages of software development do not include?

Accepted Answer

B.  conversion.

Answer

A. analysis.

Answer

C. design.

Answer

D. maintenance.

Question 10

The following are functions of database management system except?

Accepted Answer

B. operation.

Answer

A.   backup and replication.

Answer

C. rule enforcement.

Answer

D. security

Question 11

A feature on the computer desktop that indicates the current active applications is called?

Accepted Answer

D. task bar.

Answer

A.  icon.

Answer

B. menu bar.

Answer

C.  ribbon.

Question 12

The decimal fraction 0.9375 converts to binary?

Accepted Answer

C.  0.1111.

Answer

A. 0.0111.

Answer

B.  0.1011.

Answer

D. O.1001.

Question 13

In a Windows operation involving dragging and dropping an item on the desktop, the item will be?

Accepted Answer

C. moved to a new location.

Answer

A. deleted from the screen.

Answer

B.  duplicated.

Answer

D.  renamed.

Question 14

Handwritten letters, typeset documents or printout Characters can be read into the computer by?

Accepted Answer

C. Optical Character Recognition.

Answer

A.  Barcode Reader.

Answer

B. Magnetic Ink Character Recognition.

Answer

D. Optical Mark Reader.

Question 15

Pascal's calculating machine was useful in?

Accepted Answer

A. addition and subtraction only.

Answer

B.  division only.

Answer

C. multiplication and division only.

Answer

D. multiplication only.

Question 16

To centre worksheet titles across a range of cells MS Excel, the user must?

Accepted Answer

C.   select the cells containing the title text and use the fill handle to centre the text across the range of cells.

Answer

A.  widen the rows to centres the titles across the range of cells.

Answer

B. widen the columns to centre the titles across range of cell

Answer

D. select any cell containing the title text and use the fill handle to centre the text across a range of cells.

Question 17

Arrange the following inventions in chronological order. I. Slide Rule ll. Pascaline llI. Analytical Engine IV. Difference Engine

Accepted Answer

A.  I, II, IV and IIl

Answer

B.  I, IV, III and Il

Answer

C. III, IV, II and I

Answer

D. I, II, III and IV

Question 18

Express P(1 + $\frac{R}{100}$)$^N$ as a BASIC programming notation.

Accepted Answer

D. P *(1 + R /100) ^N

Answer

A. P x (1 + R ÷ 100)$^N$

Answer

B. P * (1 + $\frac{R}{100}$)$^N$

Answer

C. P x (1 + R ÷ 100)^N

Question 19

The major difference between low level programming language and high level programming language Is that?

Accepted Answer

D. low level languages do not need translators while high level languages do.

Answer

A.  low level languages need an interpreter while a high level languages need a compiler.

Answer

B.  high level languages will not need a translator but low level languages do.

Answer

C.  low level languages need a compiler while high level languages need an interpreter.

Question 20

One attribute of the Read Only Memory is that it?

Accepted Answer

C.  stores the BIOS.

Answer

A. can be modified.

Answer

B. is volatile.

Answer

D. stores the POST.

Question 21

Antivirus software is an example of?

Accepted Answer

D. utility software.

Answer

A. application software.

Answer

B. operating system

Answer

C. system software.

Question 22

In graphics, a subscript text refers to a text that is positioned?

Accepted Answer

B.  a little bit below a normal line of text.

Answer

A. a little bit above a normal line of text

Answer

C. at the end of a line of text.

Answer

D.  at the front of a line of text

Question 23

A data bus that is capable of transferring 8 bytes of data at once can be rated as?

Accepted Answer

C. a 64-bit data bus.

Answer

A. a 16-bit data bus.

Answer

B. a 32-bit data bus.

Answer

D. an 8- bit data bus.

Question 24

Which of the following application packages is most suitable for database management?

Accepted Answer

D. Fox Pro

Answer

A.  Photoshop

Answer

B. MS Publisher

Answer

C.  Macromedia Flash

Question 25

To make the entire slides in a presentation to have the same "look" in MS PowerPoint, a user  should?

Accepted Answer

C. use a presentation design template.

Answer

A. use the slide layout option.

Answer

B. use outline  view

Answer

D. add a slide option.

Question 26

In database application, the field length determines the?

Accepted Answer

A. maximum number of characters the field can accommodate.

Answer

B. maximum number of operations that can be performed on the field.

Answer

C.  level of security of the database.

Answer

D. maximum number of datatype the field can contain.

Question 27

The following are types of data network except?

Accepted Answer

A. MAC.

Answer

B. MAN.

Answer

C. PAN.

Answer

D. WAN.

Question 28

Which of the following statements best describes sequential file organization?

Accepted Answer

C. Records are sorted according to a key field.

Answer

A.  Records are arranged in no particular order.

Answer

B. Records are directly addressed to the key value.

Answer

D.  Records are used as index to access the database.

Question 29

The operation of a computer and peripherals attached to it is controlled by?

Accepted Answer

D.  system software

Answer

A.  application software.

Answer

B.  hardware

Answer

C.  liveware.

Question 30

A pre-designed document coordinating fonts, a layout and a background is also known as?

Accepted Answer

D. template

Answer

A. guide.

Answer

B.  model.

Answer

C.  ruler.

Question 31

Which of the following options best shows the arrangement of file structure?    I File ll. Field III. Character IV, Record

Accepted Answer

C.  IlI, II, IV and I

Answer

A. III, II, I and IV

Answer

B.  II, III, I  and IV

Answer

D. II, III, IV and I

Question 32

In networking, bandwidth means?

Accepted Answer

C. transmission capacity of a communication channel.

Answer

A. class of IP address used in the network

Answer

B. number of interconnected computers in the network

Answer

D. types of nodes in a communication channel

Question 33

The minimum number of computers that can constitute a network is?

Accepted Answer

D. two.

Answer

A. thirty.

Answer

B. twenty.

Answer

C. ten.

Question 34

Under classification by data representation. computers can be?

Accepted Answer

A. analogue, digital and hybrid.

Answer

B. hybrid, mainframes and analogue.

Answer

C. mini- computers, digital and supercomputers.

Answer

D.  supercomputers and mini-computers.

Question 35

Which of the following is not a criterion files?

Accepted Answer

D. Type of data

Answer

A.  Nature of content

Answer

B. Organizational method

Answer

C. Storage medium

Question 36

In order to avoid damages caused by security breaches, the user must?

Accepted Answer

A. configure firewall.

Answer

B. encourage piracy.

Answer

C.  install cracked software

Answer

D. promote cyber crime

Question 37

The EBCDIC coding system was developed on?

Accepted Answer

A.  IBM mainframe computers.

Answer

B. HP mainframe and minicomputers.

Answer

C.  Dell mainframe computer

Answer

D. Apple mainframe computers.

Question 38

The equivalent of the decimal number 89 in base 4 is?

Accepted Answer

D. 1121.

Answer

A. 1021.

Answer

B. 1201.

Answer

C. 1211.

Question 39

which of the following logic operations would select a record when at least one condition is satisfied?

Accepted Answer

D. OR

Answer

A. AND

Answer

B. NOR

Answer

C. NOT

Question 40

Removing a program on a computer properly requires?

Accepted Answer

D. uninstalling.

Answer

A. deleting.

Answer

B. archiving.

Answer

C.  disabling.

Question 41

Which of the following devices will not require the use of system software to operate?

Accepted Answer

A. Analogue camera

Answer

B. MICR

Answer

C. Mobile phones

Answer

D.  OCR

Question 42

Viruses, worms and trojan horses are all?

Accepted Answer

B.  malicious software.

Answer

A. application software

Answer

C.  robust software.

Answer

D. system software

Question 43

In MS Excel, the average of 10 numbers give B1, B2,...,B10 is?

Accepted Answer

B. @SUM(B1:B10).

Answer

A. = B1 + B2 ... B10)/10

Answer

C. #SUM(B1:B10)/10,

Answer

D. = B1 +B2 +... + B10/10.

Question 44

Digital signals can be represented by:    I. Binary Codes Il.0 and 1 III. High and Low Which of the following options is correct?

Accepted Answer

D.  I, Il and III

Answer

A.  l and Il only

Answer

B.   I and lIl only

Answer

C.  II and lIl only

Question 45

Which of the following is not a step involved in data conversion?

Accepted Answer

D. Transfer

Answer

A.  Input

Answer

B. Output

Answer

C. Process

Question 46

The communication of knowledge, concepts and ideas is referred to as?

Accepted Answer

B. information transmission.

Answer

A. information processing.

Answer

C. telecasting.

Answer

D.  webcasting.

Question 47

Which of the following memory types are nonvolatile? I. PROM II. SRAM II. EEPROM IV. DRAM

Accepted Answer

A.    I and lll only

Answer

B.  I and IV only

Answer

C. Il and ll only

Answer

D. IIl and IV only

Question 48

The following are types of errors in programming except?

Accepted Answer

A. grammar error.

Answer

B. syntax error.

Answer

C. logic error.

Answer

D. arithmetic error.

2020 WAEC (WASSCE) Computer Studies Past Questions

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