COMPUTER SCIENCE - PAGE 6
1. Which of the following instruction need not to be executed in kernel mode ?
1) Change memory management registers
2) Set the time of day clock
3) Change processor priority
4) Write the program counter
Ans: 4
2. Which one is not true related to segmentation ?
1) Segmentation is faster than paging.
2) Program is divided into variable size segments.
3) Compiler divides program into segments.
4) Offset must be added to starting segment address.
Ans: 1
3. Size of virtual memory depends on the size of ?
1) Data bus
2) Address Bus
3) Main Memory
4) None of these
Ans: 2
4. Sector interleaving in disks is done by ?
1) Disk Manufacturer
2) Disk Controller
3) Operating System
4) None of these
Ans: 3
5. In round robin CPU scheduling , as the time quantum is increased , the average turn around time
1) Increases
2) Decreases
3) Remain constant
4) Varies irregularly
Ans: 4
6. In operating system which one of the following is not a scheduling algorithms ?
1) FCFS
2) SJF
3) Round Robin
4) Starvation
Ans: 4
7. Fence register is used for ?
1) Memory Protection
2) File Protection
3) CPU Protection
4) All of these
Ans: 1
8. Amount of work completed in a unit of time is ?
1) Throughput
2) Response
3) Turn Around
4) Latency
Ans: 1
9. Which one the following is a technique to prevent starvation ?
1) Context Switching
2) Flooding
3) Aging
4) Dispatching
Ans: 3
10. Which of the following is not a memory allocation method ?
1) First fit
2) Best fit
3) Worst fit
4) Not fit
Ans: 4
11. Physical memory is broken into fixed size blocks called ?
1) Frames
2) Pages
3) Chunks
4) Buffer
Ans: 1
12. Which of the following system objects that are neither files nor directories ?
1) Semaphore
2) Monitor
3) Both Semaphore and Monitor
4) None of these
Ans: 3
13. Solution to critical section problem is ?
1) Mutual exclusion , Progress, Bounded waiting
2) Mutual exclusion , Progress, Race Condition
3) Bounded Waiting, Progress, Unbounded Buffer
4) Race Condition, Unbounded buffer, Progress
Ans: 1
14. A successful " fork " system call in unix return __________ to child process.
1) PID (Parent)
2) 0
3) 1
4) NULL
Ans: 2
15. Number of arguments specified in a Unix command line argument is identified by :
1) $$
2) $?
3) $*
4) $#
Ans: 4
16. Which among the following is language processor ?
1) Assembler
2) Compiler
3) Interpreter
4) All of these
Ans: 4
17. RAID stands for ?
1) Redundant array of inexpensive disks
2) Relative array of inexpensive disks
3) Redundant array of interrelated disks
4) Relative array of interrelated disks
Ans: 1
18. Which of the statement is not true related to threads ?
1) Thread is a light weight process.
2) User level threads are managed by thread library
3) Kernel level threads are faster to create and manage than user level threads
4) Thread minimize context switching time
Ans: 3
19. Which of the following is not a valid mode of file opening for " open " system call in Unix ?
1) O_RDONLY
2) O_WRONLY
3) O_WRRD
4) O_RDWR
Ans: 3
20. What is the return type of " write ' system call in Unix ?
1) size_t
2) ssize_t
3) int
4) char
Ans: 2
21. " head " Unix command , when used without an option , displays how many lines of the file ?
1) 3
2) 5
3) 10
4) 100
Ans: 3
22. What will be the output of the following Unix command tail c + 512 filename
1) Copies last 512 bytes from file
2) Copies every byte after skipping 511 bytes
3) Copies last 512 lines from file
4) Copies every line after skipping 511 lines
Ans: 2
23. Which of the following wait is undesirable for a process ?
1) Waiting in ready queue
2) Waiting for input/output
3) Waiting for semaphore
4) Busy waiting
Ans: 4
24. Which is false statement :
1) The dispatcher module gives control to CPU, to process the selected short term scheduler (STS)
2) The dispatcher may invoke during process context switch
3) Dispatch latency , stop one process and start another process
4) The dispatcher is not used in CPU scheduling
Ans: 4
25. On a system using non preemptive scheduling , process with expected runtime of 5, 18 , 9 ,12 are in ready
queue . In what order they should be run to minimize wait time ?
1) 5 , 18 , 9 , 12
2) 5 , 9 , 12 , 18
3) 18 , 12 , 9 , 5
4) 18 , 5 , 9 , 12
Ans: 2
26:-What are units of width and height specified in HTML tag ?
A:-Pixels
B:-Bytes
C:-Bits
D:-All of the above
Ans: A
27:-What will be the values of x, m and n after execution of the following statements ?
int x, m, n;
m = 10;
n = 15;
x = ++m + n++;
A:-x = 25, m = 10, n = 15
B:-x = 27, m = 10, n = 15
C:-x = 26, m = 11, n = 16
D:-x = 27, m = 11, n = 16
Ans: C
28:-What will be the result of the expression 13 and 25 ?
A:-38
B:-9
C:-25
D:-12
Ans: B
29:-Which of the following will produce a value of 22 if x = 22.9 ?
A:-ceil(x)
B:-log(x)
C:-abs(x)
D:-floor(x)
Ans: D
1) Change memory management registers
2) Set the time of day clock
3) Change processor priority
4) Write the program counter
Ans: 4
2. Which one is not true related to segmentation ?
1) Segmentation is faster than paging.
2) Program is divided into variable size segments.
3) Compiler divides program into segments.
4) Offset must be added to starting segment address.
Ans: 1
3. Size of virtual memory depends on the size of ?
1) Data bus
2) Address Bus
3) Main Memory
4) None of these
Ans: 2
4. Sector interleaving in disks is done by ?
1) Disk Manufacturer
2) Disk Controller
3) Operating System
4) None of these
Ans: 3
5. In round robin CPU scheduling , as the time quantum is increased , the average turn around time
1) Increases
2) Decreases
3) Remain constant
4) Varies irregularly
Ans: 4
6. In operating system which one of the following is not a scheduling algorithms ?
1) FCFS
2) SJF
3) Round Robin
4) Starvation
Ans: 4
7. Fence register is used for ?
1) Memory Protection
2) File Protection
3) CPU Protection
4) All of these
Ans: 1
8. Amount of work completed in a unit of time is ?
1) Throughput
2) Response
3) Turn Around
4) Latency
Ans: 1
9. Which one the following is a technique to prevent starvation ?
1) Context Switching
2) Flooding
3) Aging
4) Dispatching
Ans: 3
10. Which of the following is not a memory allocation method ?
1) First fit
2) Best fit
3) Worst fit
4) Not fit
Ans: 4
11. Physical memory is broken into fixed size blocks called ?
1) Frames
2) Pages
3) Chunks
4) Buffer
Ans: 1
12. Which of the following system objects that are neither files nor directories ?
1) Semaphore
2) Monitor
3) Both Semaphore and Monitor
4) None of these
Ans: 3
13. Solution to critical section problem is ?
1) Mutual exclusion , Progress, Bounded waiting
2) Mutual exclusion , Progress, Race Condition
3) Bounded Waiting, Progress, Unbounded Buffer
4) Race Condition, Unbounded buffer, Progress
Ans: 1
14. A successful " fork " system call in unix return __________ to child process.
1) PID (Parent)
2) 0
3) 1
4) NULL
Ans: 2
15. Number of arguments specified in a Unix command line argument is identified by :
1) $$
2) $?
3) $*
4) $#
Ans: 4
16. Which among the following is language processor ?
1) Assembler
2) Compiler
3) Interpreter
4) All of these
Ans: 4
17. RAID stands for ?
1) Redundant array of inexpensive disks
2) Relative array of inexpensive disks
3) Redundant array of interrelated disks
4) Relative array of interrelated disks
Ans: 1
18. Which of the statement is not true related to threads ?
1) Thread is a light weight process.
2) User level threads are managed by thread library
3) Kernel level threads are faster to create and manage than user level threads
4) Thread minimize context switching time
Ans: 3
19. Which of the following is not a valid mode of file opening for " open " system call in Unix ?
1) O_RDONLY
2) O_WRONLY
3) O_WRRD
4) O_RDWR
Ans: 3
20. What is the return type of " write ' system call in Unix ?
1) size_t
2) ssize_t
3) int
4) char
Ans: 2
21. " head " Unix command , when used without an option , displays how many lines of the file ?
1) 3
2) 5
3) 10
4) 100
Ans: 3
22. What will be the output of the following Unix command tail c + 512 filename
1) Copies last 512 bytes from file
2) Copies every byte after skipping 511 bytes
3) Copies last 512 lines from file
4) Copies every line after skipping 511 lines
Ans: 2
23. Which of the following wait is undesirable for a process ?
1) Waiting in ready queue
2) Waiting for input/output
3) Waiting for semaphore
4) Busy waiting
Ans: 4
24. Which is false statement :
1) The dispatcher module gives control to CPU, to process the selected short term scheduler (STS)
2) The dispatcher may invoke during process context switch
3) Dispatch latency , stop one process and start another process
4) The dispatcher is not used in CPU scheduling
Ans: 4
25. On a system using non preemptive scheduling , process with expected runtime of 5, 18 , 9 ,12 are in ready
queue . In what order they should be run to minimize wait time ?
1) 5 , 18 , 9 , 12
2) 5 , 9 , 12 , 18
3) 18 , 12 , 9 , 5
4) 18 , 5 , 9 , 12
Ans: 2
26:-What are units of width and height specified in HTML tag ?
A:-Pixels
B:-Bytes
C:-Bits
D:-All of the above
Ans: A
27:-What will be the values of x, m and n after execution of the following statements ?
int x, m, n;
m = 10;
n = 15;
x = ++m + n++;
A:-x = 25, m = 10, n = 15
B:-x = 27, m = 10, n = 15
C:-x = 26, m = 11, n = 16
D:-x = 27, m = 11, n = 16
Ans: C
28:-What will be the result of the expression 13 and 25 ?
A:-38
B:-9
C:-25
D:-12
Ans: B
29:-Which of the following will produce a value of 22 if x = 22.9 ?
A:-ceil(x)
B:-log(x)
C:-abs(x)
D:-floor(x)
Ans: D
30. Full form of URL is
A) Uniform Resource Locator B) Uniform Resource Link
C) Uniform Registered Link D) Unified Resource Link
Ans: A
31. Arrange in descending order the units of memory TB, KB, GB, MB.
A) TB>MB>GB>KB B) MB>GB>TB>KB
C) TB>GB>MB>KB D) GB>MB>KB>TB
Ans: C
32. Symbols used in an assembly language are
A) Codes B) Mnemonics
C) Assembler D) All of the above
Ans: B
33. A process is
A) Program in High level language kept on disk
B) Contents of main memory
C) A program in execution
D) A job in secondary memory
Ans: C
34. Thrashing is
A) A natural consequence of virtual memory systems
B) Can always be avoided by swapping
C) Always occurs on large computers
D) Can be caused by poor paging algorithms
Ans: D
35. A computer with more than one processor is known as
A) Uniprocess B) Multiprocessor
C) Multithreaded D) Multiprogramming
Ans: B
36. The FIFO algorithm
A) Executes the first job that last entered the queue
B) Executes the first job that first entered the queue
C) Execute the first job that has been in the queue the longest
D) Executes the first job with the least processor needs
Ans: B
37. A collection of interrelated records is called
A) Management Information System B) Spread Sheet
C) Database D) Text file
Ans: C
A) Uniform Resource Locator B) Uniform Resource Link
C) Uniform Registered Link D) Unified Resource Link
Ans: A
31. Arrange in descending order the units of memory TB, KB, GB, MB.
A) TB>MB>GB>KB B) MB>GB>TB>KB
C) TB>GB>MB>KB D) GB>MB>KB>TB
Ans: C
32. Symbols used in an assembly language are
A) Codes B) Mnemonics
C) Assembler D) All of the above
Ans: B
33. A process is
A) Program in High level language kept on disk
B) Contents of main memory
C) A program in execution
D) A job in secondary memory
Ans: C
34. Thrashing is
A) A natural consequence of virtual memory systems
B) Can always be avoided by swapping
C) Always occurs on large computers
D) Can be caused by poor paging algorithms
Ans: D
35. A computer with more than one processor is known as
A) Uniprocess B) Multiprocessor
C) Multithreaded D) Multiprogramming
Ans: B
36. The FIFO algorithm
A) Executes the first job that last entered the queue
B) Executes the first job that first entered the queue
C) Execute the first job that has been in the queue the longest
D) Executes the first job with the least processor needs
Ans: B
37. A collection of interrelated records is called
A) Management Information System B) Spread Sheet
C) Database D) Text file
Ans: C
38. Which is the device that converts computer output into a form that can be transmitted over a telephone line ?
A) Teleport B) Multiplexer
C) Concentrator D) Modem
Ans: D
39. A distributed network configuration in which all data/information pass through a central computer is
A) Bus network B) Star network
C) Duplex D) Ring network
Ans: B
40. Firmware means
A) Software B) Hardware
C) Software available on hardware D) None of these
Ans: C
41. A magnetic tape can serve as
A) Input media B) Output media
C) Secondary storage media D) All of the above
Ans: D
42. Which of the following is the ascending order of data hierarchy ?
A) bit – byte – record – field – database – file
B) bit – byte – field – record – file – database
C) bit – byte – file – field – record – database
D) bit – record – byte – field – file – database
Ans: B
43. Which device is required for the internet connection ?
A) Joystick B) Modem
C) CD Drive D) NIC Card
Ans: B
44. Which of the following registers is used to keep track of address of the memory location where the next instruction is located ?
A) Memory address register B) Memory data register
C) Instruction register D) Program counter
Ans: D
45. What is a light pen ?
A) Mechanical input device B) Optical input device
C) Electronic input device D) Optical output device
Ans: B
46. Daisy wheel printer is a type of
A) Matrix printer B) Impact printer
C) Laser printer D) Manual printer
Ans: B
47. The translator program that converts source code in high level language into machine codeline by line is called
A) Assembler B) Compiler
C) Loader D) Interpreter
Ans: D
A) Teleport B) Multiplexer
C) Concentrator D) Modem
Ans: D
39. A distributed network configuration in which all data/information pass through a central computer is
A) Bus network B) Star network
C) Duplex D) Ring network
Ans: B
40. Firmware means
A) Software B) Hardware
C) Software available on hardware D) None of these
Ans: C
41. A magnetic tape can serve as
A) Input media B) Output media
C) Secondary storage media D) All of the above
Ans: D
42. Which of the following is the ascending order of data hierarchy ?
A) bit – byte – record – field – database – file
B) bit – byte – field – record – file – database
C) bit – byte – file – field – record – database
D) bit – record – byte – field – file – database
Ans: B
43. Which device is required for the internet connection ?
A) Joystick B) Modem
C) CD Drive D) NIC Card
Ans: B
44. Which of the following registers is used to keep track of address of the memory location where the next instruction is located ?
A) Memory address register B) Memory data register
C) Instruction register D) Program counter
Ans: D
45. What is a light pen ?
A) Mechanical input device B) Optical input device
C) Electronic input device D) Optical output device
Ans: B
46. Daisy wheel printer is a type of
A) Matrix printer B) Impact printer
C) Laser printer D) Manual printer
Ans: B
47. The translator program that converts source code in high level language into machine codeline by line is called
A) Assembler B) Compiler
C) Loader D) Interpreter
Ans: D
48. The operating system manages
A) Memory B) Processor
C) Disk and I/O devices D) All of the above
Ans: D
49. A name or number used to identify a storage location is called
A) A byte B) A record
C) An address D) All of above
Ans: C
50. Communication circuits that transmit data in both directions but not at the same time are operating in
A) Simplex mode B) Half-duplex mode
C) Full-duplex mode D) Asynchronous mode
Ans: B
51. Which of these is a quick way to copy formatting from a selected cell to two other cells on the same worksheet ?
A) Use CTRL to select all three cells, then click the Paste Button image button on the standard toolbar
B) Copy the selected cell, then select the other two cells, click Style on the format menu, then click modify
C) Click Format Painter Button image on the Formatting toolbar twice, then click in each cell you want to copy the formatting to
D) Use Alt to select all three cells, then click the Paste Button image button on the standard toolbar
Ans: C
52. What displays the content of the active cell in Excel ?
A) Name box B) Row headings
C) Formula bar D) Task pane
Ans: C
A) Memory B) Processor
C) Disk and I/O devices D) All of the above
Ans: D
49. A name or number used to identify a storage location is called
A) A byte B) A record
C) An address D) All of above
Ans: C
50. Communication circuits that transmit data in both directions but not at the same time are operating in
A) Simplex mode B) Half-duplex mode
C) Full-duplex mode D) Asynchronous mode
Ans: B
51. Which of these is a quick way to copy formatting from a selected cell to two other cells on the same worksheet ?
A) Use CTRL to select all three cells, then click the Paste Button image button on the standard toolbar
B) Copy the selected cell, then select the other two cells, click Style on the format menu, then click modify
C) Click Format Painter Button image on the Formatting toolbar twice, then click in each cell you want to copy the formatting to
D) Use Alt to select all three cells, then click the Paste Button image button on the standard toolbar
Ans: C
52. What displays the content of the active cell in Excel ?
A) Name box B) Row headings
C) Formula bar D) Task pane
Ans: C
53. In Windows, which of the following is suitable after installing new drivers ?
A) Shut Down B) Restart
C) Sleep D) Hibernate
Ans: B
54. Which of the following is the extension of graphics files ?
A) .doc B) .mdb
C) .gif D) .tmp
Ans: C
55. Which of the following is a type of system software ?
A) Device driver
B) Word processor
C) Write once read-only-memory
D) Anti-virus
Ans: A
56. What is the best way to have a data and the slide number appear on every slide ?
A) Choose Tools, Header and Footer, click Slide tab, select the desired options, click Apply to All
B) Choose Insert, Header and Footer, click Slide tab, select the desired options, click Apply to All
C) Choose View, Header and Footer, click Slide tab, select the desired options, click Apply to All
D) Choose File, Header and Footer, click Slide tab, select the desired options, click Apply to All
Ans: B
57. A Hyperlink is
A) Connection between two computers
B) Connection between two countries on the net
C) Gateway to the next web page
D) Gateway between five continents
Ans: C
A) Shut Down B) Restart
C) Sleep D) Hibernate
Ans: B
54. Which of the following is the extension of graphics files ?
A) .doc B) .mdb
C) .gif D) .tmp
Ans: C
55. Which of the following is a type of system software ?
A) Device driver
B) Word processor
C) Write once read-only-memory
D) Anti-virus
Ans: A
56. What is the best way to have a data and the slide number appear on every slide ?
A) Choose Tools, Header and Footer, click Slide tab, select the desired options, click Apply to All
B) Choose Insert, Header and Footer, click Slide tab, select the desired options, click Apply to All
C) Choose View, Header and Footer, click Slide tab, select the desired options, click Apply to All
D) Choose File, Header and Footer, click Slide tab, select the desired options, click Apply to All
Ans: B
57. A Hyperlink is
A) Connection between two computers
B) Connection between two countries on the net
C) Gateway to the next web page
D) Gateway between five continents
Ans: C
58. The principle of locality of reference justifies the use of
A) Re-enterable B) Non reusable
C) Virtual memory D) Cache memory
Ans: D
59. Where is RAM located ?
A) Expansion Board B) External Drive
C) Mother Board D) All of above
Ans: C
60. The term associated with the comparison of processing speeds of different computer systems is
A) EFTS B) MPG
C) MIPS D) CPS
Ans: C
61. Software instruction intended to satisfy a user’s specific processing needs are called
A) System software B) A microcomputer
C) Documentation D) Applications software
Ans: D
62. ‘Bluetooth’ technology allows
A) Landline phone to mobile phone communication
B) Signal transmission on mobile phones only
C) Wireless communication between equipments
D) Satellite television communication
Ans: C
63. UNIX is typically used for
A) Desktop computers B) Laptop computers
C) Supercomputers D) All of these
Ans: D
64. Which of the following is the universal gate ?
A) NAND B) OR
C) AND D) NOT
Ans: A
A) Re-enterable B) Non reusable
C) Virtual memory D) Cache memory
Ans: D
59. Where is RAM located ?
A) Expansion Board B) External Drive
C) Mother Board D) All of above
Ans: C
60. The term associated with the comparison of processing speeds of different computer systems is
A) EFTS B) MPG
C) MIPS D) CPS
Ans: C
61. Software instruction intended to satisfy a user’s specific processing needs are called
A) System software B) A microcomputer
C) Documentation D) Applications software
Ans: D
62. ‘Bluetooth’ technology allows
A) Landline phone to mobile phone communication
B) Signal transmission on mobile phones only
C) Wireless communication between equipments
D) Satellite television communication
Ans: C
63. UNIX is typically used for
A) Desktop computers B) Laptop computers
C) Supercomputers D) All of these
Ans: D
64. Which of the following is the universal gate ?
A) NAND B) OR
C) AND D) NOT
Ans: A
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