PPSC Important Solved MCQs of Computer Science
1). GUI Stands for:
a). Graphical user interface
b). Global User Interface
c). Graphical User Interface
d). None of the above
2). MS DOS is an example of ________ interface.
a). GUI
b). CLI
c). MAC
d). All of the above
3). ________ operating system are uses to control machinery, scientific instruments and industrial system:
a). Batch
b). Single User
c). Real Time Â
d). All of the above
4). An icon present on the Windows desktop that enables users to view drives, folders, and files is called:
a). My Documents
b). My Computer
c). Internet Explorer Â
d). Opera Explorer
5). Windows Explorer is look like:
a). My Documents
b). My Computer
c). Internet Explorer Â
d). Opera Explorer
6). Internet Explorer was first introduced in:
a). 2005
b). 1998
c). 1995
d). 1990
7). An area that runs across the bottom of the windows desktop is called:
a). Property bar
b). Title bar
c). System Tray
d). Task Bar
8). ___________ a pictorial representation of a program or software function or feature:
a). Picture
b). Symbol
c). Icon Â
d). Graphical Image
9). A temporary lineup of print requests waiting to be printed a printer:
a). Printer Request
b). Print Queue Â
c). Print Waiting
d). None of the above
10). The shortest period of time is a:
a). millisecond
b). nanosecond
c). picosecond Â
d). microsecond
11). An organic chip is called:
a). Storage chip
b). biochipÂ
c). microchip
d). silicon chip
12). One Megabyte is equivalent to:
a). 210 bytes
b). 230 bytes
c). 220 bytes Â
d). None of the above
13). A person who gains illegal access to a computer system:
a). Hacker Â
b). Worm
c). Software
d). Zapper
14). When the control unit directs the ALU to perform an operating on the data, the machine cycle is involved in its:
a). First step
b). Third Step Â
c). Second step
d). Fourth step
15). A type of computer that is faster because it has few instruction:
a). Symbolic
b). RISC
c). ASCII-8
d). ROM burner
16). An emerging technology that provides nonvolatile memory chips is:
a). Flash Memory Â
b). PROM
c). CMOS
d). CISC
17). Tool to change PROM Chip are Called:
a). Chip Kits
b). RAM burner
c). PROM burner
d). none of these
18). Assuming 8 bit for data, 1 bit for parity, 1 start bit and 2 stop bits, the number of characters that 1200 BPS communication line can transmit is:
a). 10 CPS
b). 120 CPS
c). 12 CPS
d). None of the these
19). The widely used code in data communication is:
a). a bit ASCII
b). 7 bit ASCII
c). EBCDIC
d). None of the above
20). Rearranging data in a new sequence is known as:
a). Updating
b). Batching
c). SortingÂ
d). Summarizing
21). If a processor does not have direct and unassisted access to data items these items are said to be:
a). Off line
b). Time shared
c). On line
d). None of these
22). Which of the following is not a component of telecommunications?
a). Sender
b). Office Device
c). MediumÂ
d). Receiver
23). In Time Division Multiplexing:
a). Time is doubled between bits of a byte
b). Time slicing at CPU level takes place
c). Total time available in the channel is divided between several users and each user is allotted a time slice
d). None of these
24). Point of Sale terminal to:
a). Terminals associated with MICR
b). Smart terminal
c). Terminal associated with OCR
d). None of the above
25). A bootstrap is:
a). The flat cable that connects the CPU to the printer
b). The flat cable from the disk controller card to the disk drive
c). Additional Memory Device
d). A small initialization program to start up the computer Â
26). Data verification is a process of:
a). Rechecking the data entered by one person through re-entry by another person
b). Entering data on two different media and comparing them
c). Checking whether the instruction in a program are in proper order
d). checking the computer results with manual outputs
27). An A/D converter does the conversion from:
a). Digital Analog
b). Analog to Digital
c). Voltage to ampere
d). Analog to digital  Â
28). Program maintenance means:
a). Maintaining a program exactly the way it was initially development
b). Changing a program due to changes in the organization Â
c). Adopting an altogether new program
d). Removing the errors from a program
29). A conceptual error in a program is a/an:
a). Logical error   Â
b). Execution error
c). Syntactical error
d). None of the above
30). Implementation of a Program involves:
a). Complication of the program
b). Debugging the program
c). Testing the program with data
d). All of the above   Â
31). Temporary storage areas within the CPU are called:
a). ROMs
b). Registers Â
c). Accumulators
d). Address
32). Distribution data entry means that data can be:
a). Entered at different location where it originates
b). Sent to different locations from a central place
c). Access from different places known as distribution points
d). Distributed through network
33). Excess -3 Code is known as:
a). Weighted code
b). Cylic Redundancy code
c). Self-complementing Â
d). Algebraic code
34). A computer has a word length of 32 bits. The maximum address that can be generated is:
a). 232
b). 232-1
c). 232-1
d). None of these
35). Which of the following is associated with optics:
a). Winchester
b). RAM Â
c). C ( D) ROM
d). None of these
36). The number 7F00 in Hexadecimal when multiplied by 61 is:
a). 7F16
b). 167F00
c). 7F006
d). None of these  Â
37). The output of a sequential circuits depends upon:
a). Present input
b). Past input
c). Both a and b
d). none of a and b
38). Which of the following descriptions relates to a floppy diskette:
a). 9 – track 1600 BPI
b). Double sided double density Â
c). 33 Mhz – zero wait time
d). 40 MB capacity
39). A parallel interface:
a). transmit one bit at a time
b). transmit one or more bits at a time using a single wire
c). transmit 8 or more bits at a time using a many wires
d). cannot be used to connect a printer to a PC
40). Pick out the CORRECT statement:
a). In a positional number system, each symbol represents the same value irrespective of its position
b). The highest symbol in a position number system has a value equal to the number of symbols in the system
c). It is not always possible to find the exact binary number equivalent to a decimal number with a fraction Â
d). Each hexadecimal digit can be represented as a sequence of three binary symbols.
41). Which of the following is NOT correct?
a). A memory location is identified by a unique number called its address
b). The content of a memory location does not change its address
c). Entering data into a memory location does not change is address
d). A memory location can hold only a data item and not a program instruction   Â
42). Error reports are an example of:
a). Scheduled report
b). On demand reports
c). exception reports Â
d). external
43). Computer follows a simple principle called GIGO which means:
a). Garbage input good output
b). Garbage in garbage out Â
c). Great instruction great output
d). Good input Good Output
44). When the control unit gets an instruction it is called:
a). E-mail
b). Machine Time
c). I-Time
d). ALU Time
45). Which of the following is not hardware:
a). Magnetic Tap
b). Printer
c). VDU terminal
d). Assembler   Â
46). Pick out the wrong definition:
a). Access time – time needed to access the output   Â
b). EDP – acronym for Electronic Data Processing
c). COBOL – a language used for business data processing
d). Control Unit – Heart of a Computer
47). The lowest level of management is concerned with:
a). Operational Information
b). Traditional Information Â
c). Long Term Planning
d). Strategic Information
48). Which of the following is not hardware:
a). Magnetic Tape
b). VDU Terminal
c). Hard Disk
d). Assembler   Â
49). Pick out the wrong definition:
a). Access time – time needed to access the output   Â
b). EDP – acronym for Electronic Data Processing
c). COBOL a language used for business 1 Data Processing
d). Control Unit – Heart of a computer
50). By word processing we mean:
a). Processing only words and not the number
b). String manipulation
c). A method of providing facility of text processing Â
d). A software game for playing with words like “ Hang man:
 Useful Links:
Computer Science Practice Test No. 1
Computer Science Practice Test No. 2
Computer Science Practice Test No. 3
Computer Science Practice Test No. 4
Computer Science Practice Test No. 5
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