Lecturer Computer Science Past Papers

 SPSC,PPSC Lecturer Computer Science MCQs Past Papers
(1) AX register is also known as:
(a) Accumulator
(b) Collector
(c) Distributor
(d) Counter
(e) None of these
(2) In the Base + Offset addressing, Offset address is also known as:
(a) Physical Address
(b) Logical Address
(c) Actual Address
(d) Instruction Address
(e) None of these
(3) The technique for allowing a unit to check the status of another independently function unit is known as?
(a) Interrupt
(b) System call
(c) Polling
(d) Trape
(e) None of these
(4) The method for storing data temporarily such that the input-output of the same job is overlapped with its own processing, is known as:
(a) Spooling
(b) Contention
(c) I/O wait
(d) Buffering
(e) None of these
(5) The DMA that uses Busses when CPU is not using them is termed as:
(a) Shared DMA
(b) Cycle Stealing
(c) Channel
(d) Transparent DMA
(e) None of these
(6) _________ Scheduler deals with the decision as to whether to admit another new job to the system.
(a) High Level
(b) Medium Level
(c) Low Level
(d) Short term
(e) None of these
7) When the process is in the states of Blocked Suspended or Ready Suspended, its relevant data is
stored in:
(a) Main Memory
(b) Hard Disk
(c) Magnetic Tape
(d) Buffer
(e) None of these
(8) Priority, P = (Time Waiting + Run Time) / Run Time is used to calculate priority in __________ scheduling algorithm:
(a) Shortest Job First
(b) Priority Scheduling
(c) Longest Wait First
(d) Highest Response Ratio Next
(e) None of these
(9) HDLC Protocol stands for:
(a) High-Level Data Link Control
(b) High Level Development Protocol
(c) Huge Level Data Link Control
(d) High Development Level Control
(e) None of these
(10) _________ is the generic name for a set of standards issued by the International CommunicationsStandards Body CCITT, designed to support Message Handling Systems; i.e. Electronic Mail.
(a) TCP/IP
(b) ISDN
(c) X.400
(d) X.25
(e) None of these
(11) ________ layer is responsible for the transfer of a packet of data along one link in the network. It organizes data into frames and detects errors in transmission.
(a) Physical Layer
(b) Data Link Layer
(c) Network Layer
(d) Transport Layer
(e) None of these
(12) Encryption is the conversion of data in some intelligible format into an unintelligible format called _________ to prevent the data from being understood if read by an unauthorized party.
(a) Clear Text
(b) Encrypted Text
(c) Cipher Text
(d) Coded Text
(e) None of these
(13) Binary search requires about ______ comparisons with an initial list of 1,000,000 elements.
(a) 10
(b) 20
(c) 35
(d) 100
(e) None of these
(14) A _________ header list is a header list where the last node contains the null pointer.
(a) Grounded
(b) Circular
(c) One way
(d) Rooted
(e) None of these
(15) ________ are small applications that are accessed on an internet server, transported over the internet, automatically installed and run as part of a web document.
(a) Applets
(b) Java Bean
(c) Sockets
(d) Java Component
(e) None of these
(16) AWT stands for:
(a) Abstract Window Technique
(b) Abstract Window Toolkit
(c) Actual Window Technique
(d) Added Window Toolkit
(e) None of these
17) GIF images can have only upto _______ colors.
(a) 128
(b) 256
(c) 512
(d) 1024
(e) None of these
(18) ________ is stored on a client and contains state information of the website visited.
(a) Cookies
(b) Servelet
(c) History
(d) Resident Page
(e) None of these
(19) In software Engineering KPA denotes.
(a) Key Process Audit
(b) Key Process Area
(c) Key Process Analysis
(d) Key Problem Area
(e) None of these
(20) The ________ Process Model defines a series of events that will trigger transitions from state to state for each of software engineering activities.
(a) Spiral
(b) Operational
(c) RAD
(d) Concurrent Development
(e) None of these
21.  Which of the following best describes “virtual memory?”
(a)A portion of the hard disk considered as RAM
(b)Extended memory on the secondary storage thatis used whenever physical memory is full
(c)The abstraction of separating logical memory–memory as seen by the process–from physical
memory–memory as seen by the processor
(d)It is the page file in Windows folder  (e)None of these
22.  The ‘cmp’ instruction modifies the:
(a)Instruction register  (b)Flags register  (c)Segment register (d)None of these
23.  Consider the following page reference string: 1, 2, 3, 4, 2, 1, 5, 6, 2, 1, 2, 3, 7, 6, 3, 2, 1 Assuming there
are 4 page frames available and that all frames are initially empty, what is the total number of page
faults that would occur for the page reference string above if the least-recently-used (LRU) replacement
policy is used?
(a)6  (b)9  (c)10  (d)11  (e)None of these
24.  The Banker’s algorithm is used to ____________.
(a)Rectify deadlock  (b)Detect deadlock  (c)Prevent deadlock
(d)Avoid deadlock  (e)None of these
25.  The necessary conditions needed before deadlock can occur are ______.
(a)  No Mutual Exclusion, Hold and wait, Preemption, Circular Wait
(b)  Mutual Exclusion, No Hold and wait, Preemption, Circular Wait
(c)  Mutual Exclusion, Hold and wait, No Preemption, Circular Wait
(d)  Mutual Exclusion, Hold and wait, Preemption, No Circular Wait  (e)None of these
26.  Difference between data link layer and transport layer error detection is that:
(a)Data link detects transmission errors while transport layer detects segmentation faults
(b)Data link detects node‐to‐node errors while transport layer detects end‐to‐end errors
(c)Data link detects end‐to‐end errors while transport layer detects node‐to‐node errors
(d)Data link detects segmentation errors while transport layer detects bit error  (e)None of these
27.  Phase shift keying (PSK.) method is used to modulate digital signals at 9600 bps using 16 levels. The
line signals speed (i.e. modulation rate) will be:
(a)  1200 bands  (b)  2400 bands  (c)  4800 bands  (d)  9600 bands   (e)None of these
28.  Exception handling is a powerful technique that separates error-handling code from ______ code.
(a)Buggy  (b)Faulty  (c)Normal  (d)Exceptional (e)None of these
29.  When a subroutine is called, the address of the instruction following the CALL instructions stored in/on
the:
(a)Stack pointer  (b)Accumulator  (c)Program counter (d)Stack  (e)None of these
30.  Binary tree “preorder” traversal isdefined recursively as follows:
(a)Traverse left subtree, visit th
e root, traverse right subtree
(b)Traverse right subtree, visit the root, traverse left subtree
(c)Visit the root, traverse leftsubtree, traverse right subtree
(d)Traverse left subtree, traverse right subtree , visit the root  (e)None of these
31.  The advantages of creating a prototype are:
(a)  It allows developers to experiment with number of different design options
(b)  It can serve as means of communication between developers and customers
(c)  It is better than water fall model   (d)  Both (a) and (b)     (e)None of these
32.  Choose the correct statement.
(a)  Testing can show the presence of bugs but never their absence
(b)  Testing can always find all the bugs
(c)  Testing can always be exhaustive
(d)  If we test enough then we can find all of the bugs  (e)None of these
33.  Which of the following operations need the participating relations to be union compatible?
(a)  UNION  (b)INTERSECTION  (c)DIFFERENCE (d)All of these (e)None of these
34.  The language used in application programs to requestdata from the DBMS isreferred to as the:
(a)DML  (b)DDL  (c)VDL  (d)SDL  (e)None of these
35.  What is the correct XHTML for a paragraph?
(a)
(b)
(c)    (d)
(e)None of these
36.  Which of the following HTML form method is suitable when you need to send larger form
submissions?
(a)  Get  (b)  Post  (c)  Both Get and Post  (d)  Ajax  (e)None of these
37.  (2,4) is a point on a circle that has center at the origin. Which of the following points are also on circle?
(a)  (2,-4)  (b)  (-2,4)  (c)  (4,-2)  (d)  All of above  (e)None of these
38.  In Bresenham’s algorithm, while generating a circle , it is easy to generate?
(a)  One octant first and other by successive reflection
(b)  One octant first and other by successive rotation
(c)  One octant first and other by successive translation
(d)  All octants  (e)None of these
(39) Object (also called ____) is a common data type that includes photograph, audio, video, or a
document created in other applications.
(a) Number (b) BLOB (c) Integer  (d) Binary  (e) None of these
(40) In a database, a(n) ____ is a group of related fields.
(a) Table  (b) Key (c) Record (d) Primary Field (e) None of these
(41) In a database, a(n) ____ field is a field that uniquely identifies each record in a file.
(a) Main (b) Identifying (c) Master (d) Key (e) None of these
(42) If the lowest annual fee at a discount warehouse is Rs.2025 and the highest is Rs. 5550, a(n) ____
on the Annual Fee field ensures it is a value between Rs. 2025 and Rs. 5550.
(a) Range Check (b) Completeness Check (c) consistency check
(d) alphabetic/numeric check (e) None of these
(43) A DBMS uses the ____ to perform validation checks.
(a) Data Server (b) data mart (c) data warehouse  (d) data dictionary
(e) None of these
(44) _______ is a network technology that defines how messages are routed from one end of a
network to the other, ensuring the data arrives correctly by dividing it into packets.
(a) HTML (b) XML (c) HTTP (d) TCP/IP (e) None of these
(45) When a computer sends data over the Internet, the data is divided into small pieces, or ____.
(a) Bundles (b) Packets (c) Slices (d) Baskets (e) None of these
47) The amount of data, instructions, and information that can travel over a communications channel
sometimes is called the ____.
(a) Broadband (b) Baseband (c) Latency (d) Bandwidth (e) None of these
(48) Fiber-optic cables have all of the following advantages over cables that use wire except____.
(a) lower costs and easier installation and modification
(b) faster data transmission and smaller size
(c) less susceptible to noise from other devices
(d) better security for signals during transmission
(e) None of these
(49) A _________ is a network that connects computers and devices in a limited geographical area,
such as a home, school computer laboratory, or office building.
(a) local area network (LAN) (b) metropolitan area network (MAN)
(c) wide area network (WAN) (d) variable area network (VAN) (e) None of these
(50) With ____ memory, the operating system allocates a portion of a storage medium, usually the
hard disk, to function as additional RAM.
(a) Virtual (b) Performance (c) Device (d) Managed (e) None of these

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